$(TOP)/ext/expert/sqlite3expert.c \
  $(TOP)/ext/expert/test_expert.c \
  $(TOP)/ext/misc/amatch.c \
  $(TOP)/ext/misc/carray.c \
  $(TOP)/ext/misc/closure.c \
  $(TOP)/ext/misc/csv.c \
  $(TOP)/ext/misc/eval.c \

  $(TOP)/ext/misc/fileio.c \
  $(TOP)/ext/misc/fuzzer.c \
  $(TOP)/ext/fts5/fts5_tcl.c \
  $(TOP)/ext/fts5/fts5_test_mi.c \
  $(TOP)/ext/fts5/fts5_test_tok.c \
  $(TOP)/ext/misc/ieee754.c \
  $(TOP)/ext/misc/mmapwarm.c \

  $(TOP)/ext/expert/sqlite3expert.c \
  $(TOP)/ext/expert/test_expert.c \
  $(TOP)/ext/misc/amatch.c \
  $(TOP)/ext/misc/carray.c \
  $(TOP)/ext/misc/closure.c \
  $(TOP)/ext/misc/csv.c \
  $(TOP)/ext/misc/eval.c \
  $(TOP)/ext/misc/explain.c \
  $(TOP)/ext/misc/fileio.c \
  $(TOP)/ext/misc/fuzzer.c \
  $(TOP)/ext/fts5/fts5_tcl.c \
  $(TOP)/ext/fts5/fts5_test_mi.c \
  $(TOP)/ext/fts5/fts5_test_tok.c \
  $(TOP)/ext/misc/ieee754.c \
  $(TOP)/ext/misc/mmapwarm.c \

  $(TOP)\ext\expert\sqlite3expert.c \
  $(TOP)\ext\expert\test_expert.c \
  $(TOP)\ext\misc\amatch.c \
  $(TOP)\ext\misc\carray.c \
  $(TOP)\ext\misc\closure.c \
  $(TOP)\ext\misc\csv.c \
  $(TOP)\ext\misc\eval.c \

  $(TOP)\ext\misc\fileio.c \
  $(TOP)\ext\misc\fuzzer.c \
  $(TOP)\ext\fts5\fts5_tcl.c \
  $(TOP)\ext\fts5\fts5_test_mi.c \
  $(TOP)\ext\fts5\fts5_test_tok.c \
  $(TOP)\ext\misc\ieee754.c \
  $(TOP)\ext\misc\mmapwarm.c \

  $(TOP)\ext\expert\sqlite3expert.c \
  $(TOP)\ext\expert\test_expert.c \
  $(TOP)\ext\misc\amatch.c \
  $(TOP)\ext\misc\carray.c \
  $(TOP)\ext\misc\closure.c \
  $(TOP)\ext\misc\csv.c \
  $(TOP)\ext\misc\eval.c \
  $(TOP)\ext\misc\explain.c \
  $(TOP)\ext\misc\fileio.c \
  $(TOP)\ext\misc\fuzzer.c \
  $(TOP)\ext\fts5\fts5_tcl.c \
  $(TOP)\ext\fts5\fts5_test_mi.c \
  $(TOP)\ext\fts5\fts5_test_tok.c \
  $(TOP)\ext\misc\ieee754.c \
  $(TOP)\ext\misc\mmapwarm.c \

3.25.0

3.26.0

#-----------------------------------------------------------------------
#   --enable-session
#
AC_ARG_ENABLE(session, [AS_HELP_STRING(
  [--enable-session], [enable the session extension [default=no]])], 
  [], [])
if test x"$enable_session" = "xyes"; then
  BUILD_CFLAGS="$BUILD_CFLAGS-DSQLITE_ENABLE_SESSION -DSQLITE_ENABLE_PREUPDATE_HOOK"
fi
#-----------------------------------------------------------------------

#-----------------------------------------------------------------------
#   --enable-debug
#
AC_ARG_ENABLE(debug, [AS_HELP_STRING(

#-----------------------------------------------------------------------
#   --enable-session
#
AC_ARG_ENABLE(session, [AS_HELP_STRING(
  [--enable-session], [enable the session extension [default=no]])], 
  [], [])
if test x"$enable_session" = "xyes"; then
  BUILD_CFLAGS="$BUILD_CFLAGS -DSQLITE_ENABLE_SESSION -DSQLITE_ENABLE_PREUPDATE_HOOK"
fi
#-----------------------------------------------------------------------

#-----------------------------------------------------------------------
#   --enable-debug
#
AC_ARG_ENABLE(debug, [AS_HELP_STRING(

#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.69 for sqlite 3.25.0.
#
#
# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
#
#
# This configure script is free software; the Free Software Foundation
# gives unlimited permission to copy, distribute and modify it.
................................................................................
subdirs=
MFLAGS=
MAKEFLAGS=

# Identity of this package.
PACKAGE_NAME='sqlite'
PACKAGE_TARNAME='sqlite'
PACKAGE_VERSION='3.25.0'
PACKAGE_STRING='sqlite 3.25.0'
PACKAGE_BUGREPORT=''
PACKAGE_URL=''

# Factoring default headers for most tests.
ac_includes_default="\
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
................................................................................
#
# Report the --help message.
#
if test "$ac_init_help" = "long"; then
  # Omit some internal or obsolete options to make the list less imposing.
  # This message is too long to be a string in the A/UX 3.1 sh.
  cat <<_ACEOF
\`configure' configures sqlite 3.25.0 to adapt to many kinds of systems.

Usage: $0 [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.
................................................................................
  --build=BUILD     configure for building on BUILD [guessed]
  --host=HOST       cross-compile to build programs to run on HOST [BUILD]
_ACEOF
fi

if test -n "$ac_init_help"; then
  case $ac_init_help in
     short | recursive ) echo "Configuration of sqlite 3.25.0:";;
   esac
  cat <<\_ACEOF

Optional Features:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
................................................................................
    cd "$ac_pwd" || { ac_status=$?; break; }
  done
fi

test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
  cat <<\_ACEOF
sqlite configure 3.25.0
generated by GNU Autoconf 2.69

Copyright (C) 2012 Free Software Foundation, Inc.
This configure script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it.
_ACEOF
  exit
................................................................................
  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

} # ac_fn_c_check_header_mongrel
cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by sqlite $as_me 3.25.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  $ $0 $@

_ACEOF
exec 5>>config.log
{
................................................................................
test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1

cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
# Save the log message, to keep $0 and so on meaningful, and to
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
This file was extended by sqlite $as_me 3.25.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  CONFIG_FILES    = $CONFIG_FILES
  CONFIG_HEADERS  = $CONFIG_HEADERS
  CONFIG_LINKS    = $CONFIG_LINKS
  CONFIG_COMMANDS = $CONFIG_COMMANDS
  $ $0 $@
................................................................................

Report bugs to the package provider."

_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
sqlite config.status 3.25.0
configured by $0, generated by GNU Autoconf 2.69,
  with options \\"\$ac_cs_config\\"

Copyright (C) 2012 Free Software Foundation, Inc.
This config.status script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it."

#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.69 for sqlite 3.26.0.
#
#
# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
#
#
# This configure script is free software; the Free Software Foundation
# gives unlimited permission to copy, distribute and modify it.
................................................................................
subdirs=
MFLAGS=
MAKEFLAGS=

# Identity of this package.
PACKAGE_NAME='sqlite'
PACKAGE_TARNAME='sqlite'
PACKAGE_VERSION='3.26.0'
PACKAGE_STRING='sqlite 3.26.0'
PACKAGE_BUGREPORT=''
PACKAGE_URL=''

# Factoring default headers for most tests.
ac_includes_default="\
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
................................................................................
#
# Report the --help message.
#
if test "$ac_init_help" = "long"; then
  # Omit some internal or obsolete options to make the list less imposing.
  # This message is too long to be a string in the A/UX 3.1 sh.
  cat <<_ACEOF
\`configure' configures sqlite 3.26.0 to adapt to many kinds of systems.

Usage: $0 [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.
................................................................................
  --build=BUILD     configure for building on BUILD [guessed]
  --host=HOST       cross-compile to build programs to run on HOST [BUILD]
_ACEOF
fi

if test -n "$ac_init_help"; then
  case $ac_init_help in
     short | recursive ) echo "Configuration of sqlite 3.26.0:";;
   esac
  cat <<\_ACEOF

Optional Features:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
................................................................................
    cd "$ac_pwd" || { ac_status=$?; break; }
  done
fi

test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
  cat <<\_ACEOF
sqlite configure 3.26.0
generated by GNU Autoconf 2.69

Copyright (C) 2012 Free Software Foundation, Inc.
This configure script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it.
_ACEOF
  exit
................................................................................
  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

} # ac_fn_c_check_header_mongrel
cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by sqlite $as_me 3.26.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  $ $0 $@

_ACEOF
exec 5>>config.log
{
................................................................................
test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1

cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
# Save the log message, to keep $0 and so on meaningful, and to
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
This file was extended by sqlite $as_me 3.26.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  CONFIG_FILES    = $CONFIG_FILES
  CONFIG_HEADERS  = $CONFIG_HEADERS
  CONFIG_LINKS    = $CONFIG_LINKS
  CONFIG_COMMANDS = $CONFIG_COMMANDS
  $ $0 $@
................................................................................

Report bugs to the package provider."

_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
sqlite config.status 3.26.0
configured by $0, generated by GNU Autoconf 2.69,
  with options \\"\$ac_cs_config\\"

Copyright (C) 2012 Free Software Foundation, Inc.
This config.status script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it."

/*
** 2018-09-16
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file demonstrates an eponymous virtual table that returns the
** EXPLAIN output from an SQL statement.
**
** Usage example:
**
**     .load ./explain
**     SELECT p2 FROM explain('SELECT * FROM sqlite_master')
**      WHERE opcode='OpenRead';
*/
#if !defined(SQLITEINT_H)
#include "sqlite3ext.h"
#endif
SQLITE_EXTENSION_INIT1
#include <assert.h>
#include <string.h>

#ifndef SQLITE_OMIT_VIRTUALTABLE

/* explain_vtab is a subclass of sqlite3_vtab which will
** serve as the underlying representation of a explain virtual table
*/
typedef struct explain_vtab explain_vtab;
struct explain_vtab {
  sqlite3_vtab base;  /* Base class - must be first */
  sqlite3 *db;        /* Database connection for this explain vtab */
};

/* explain_cursor is a subclass of sqlite3_vtab_cursor which will
** serve as the underlying representation of a cursor that scans
** over rows of the result from an EXPLAIN operation.
*/
typedef struct explain_cursor explain_cursor;
struct explain_cursor {
  sqlite3_vtab_cursor base;  /* Base class - must be first */
  sqlite3 *db;               /* Database connection for this cursor */
  char *zSql;                /* Value for the EXPLN_COLUMN_SQL column */
  sqlite3_stmt *pExplain;    /* Statement being explained */
  int rc;                    /* Result of last sqlite3_step() on pExplain */
};

/*
** The explainConnect() method is invoked to create a new
** explain_vtab that describes the explain virtual table.
**
** Think of this routine as the constructor for explain_vtab objects.
**
** All this routine needs to do is:
**
**    (1) Allocate the explain_vtab object and initialize all fields.
**
**    (2) Tell SQLite (via the sqlite3_declare_vtab() interface) what the
**        result set of queries against explain will look like.
*/
static int explainConnect(
  sqlite3 *db,
  void *pAux,
  int argc, const char *const*argv,
  sqlite3_vtab **ppVtab,
  char **pzErr
){
  explain_vtab *pNew;
  int rc;

/* Column numbers */
#define EXPLN_COLUMN_ADDR     0   /* Instruction address */
#define EXPLN_COLUMN_OPCODE   1   /* Opcode */
#define EXPLN_COLUMN_P1       2   /* Operand 1 */
#define EXPLN_COLUMN_P2       3   /* Operand 2 */
#define EXPLN_COLUMN_P3       4   /* Operand 3 */
#define EXPLN_COLUMN_P4       5   /* Operand 4 */
#define EXPLN_COLUMN_P5       6   /* Operand 5 */
#define EXPLN_COLUMN_COMMENT  7   /* Comment */
#define EXPLN_COLUMN_SQL      8   /* SQL that is being explained */


  rc = sqlite3_declare_vtab(db,
     "CREATE TABLE x(addr,opcode,p1,p2,p3,p4,p5,comment,sql HIDDEN)");
  if( rc==SQLITE_OK ){
    pNew = sqlite3_malloc( sizeof(*pNew) );
    *ppVtab = (sqlite3_vtab*)pNew;
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
    pNew->db = db;
  }
  return rc;
}

/*
** This method is the destructor for explain_cursor objects.
*/
static int explainDisconnect(sqlite3_vtab *pVtab){
  sqlite3_free(pVtab);
  return SQLITE_OK;
}

/*
** Constructor for a new explain_cursor object.
*/
static int explainOpen(sqlite3_vtab *p, sqlite3_vtab_cursor **ppCursor){
  explain_cursor *pCur;
  pCur = sqlite3_malloc( sizeof(*pCur) );
  if( pCur==0 ) return SQLITE_NOMEM;
  memset(pCur, 0, sizeof(*pCur));
  pCur->db = ((explain_vtab*)p)->db;
  *ppCursor = &pCur->base;
  return SQLITE_OK;
}

/*
** Destructor for a explain_cursor.
*/
static int explainClose(sqlite3_vtab_cursor *cur){
  explain_cursor *pCur = (explain_cursor*)cur;
  sqlite3_finalize(pCur->pExplain);
  sqlite3_free(pCur->zSql);
  sqlite3_free(pCur);
  return SQLITE_OK;
}


/*
** Advance a explain_cursor to its next row of output.
*/
static int explainNext(sqlite3_vtab_cursor *cur){
  explain_cursor *pCur = (explain_cursor*)cur;
  pCur->rc = sqlite3_step(pCur->pExplain);
  if( pCur->rc!=SQLITE_DONE && pCur->rc!=SQLITE_ROW ) return pCur->rc;
  return SQLITE_OK;
}

/*
** Return values of columns for the row at which the explain_cursor
** is currently pointing.
*/
static int explainColumn(
  sqlite3_vtab_cursor *cur,   /* The cursor */
  sqlite3_context *ctx,       /* First argument to sqlite3_result_...() */
  int i                       /* Which column to return */
){
  explain_cursor *pCur = (explain_cursor*)cur;
  if( i==EXPLN_COLUMN_SQL ){
    sqlite3_result_text(ctx, pCur->zSql, -1, SQLITE_TRANSIENT);
  }else{
    sqlite3_result_value(ctx, sqlite3_column_value(pCur->pExplain, i));
  }
  return SQLITE_OK;
}

/*
** Return the rowid for the current row.  In this implementation, the
** rowid is the same as the output value.
*/
static int explainRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){
  explain_cursor *pCur = (explain_cursor*)cur;
  *pRowid = sqlite3_column_int64(pCur->pExplain, 0);
  return SQLITE_OK;
}

/*
** Return TRUE if the cursor has been moved off of the last
** row of output.
*/
static int explainEof(sqlite3_vtab_cursor *cur){
  explain_cursor *pCur = (explain_cursor*)cur;
  return pCur->rc!=SQLITE_ROW;
}

/*
** This method is called to "rewind" the explain_cursor object back
** to the first row of output.  This method is always called at least
** once prior to any call to explainColumn() or explainRowid() or 
** explainEof().
**
** The argv[0] is the SQL statement that is to be explained.
*/
static int explainFilter(
  sqlite3_vtab_cursor *pVtabCursor, 
  int idxNum, const char *idxStr,
  int argc, sqlite3_value **argv
){
  explain_cursor *pCur = (explain_cursor *)pVtabCursor;
  char *zSql = 0;
  int rc;
  sqlite3_finalize(pCur->pExplain);
  pCur->pExplain = 0;
  if( sqlite3_value_type(argv[0])!=SQLITE_TEXT ){
    pCur->rc = SQLITE_DONE;
    return SQLITE_OK;
  }
  sqlite3_free(pCur->zSql);
  pCur->zSql = sqlite3_mprintf("%s", sqlite3_value_text(argv[0]));
  if( pCur->zSql ){
    zSql = sqlite3_mprintf("EXPLAIN %s", pCur->zSql);
  }
  if( zSql==0 ){
    rc = SQLITE_NOMEM;
  }else{
    rc = sqlite3_prepare_v2(pCur->db, zSql, -1, &pCur->pExplain, 0);
    sqlite3_free(zSql);
  }
  if( rc ){
    sqlite3_finalize(pCur->pExplain);
    pCur->pExplain = 0;
    sqlite3_free(pCur->zSql);
    pCur->zSql = 0;
  }else{
    pCur->rc = sqlite3_step(pCur->pExplain);
    rc = (pCur->rc==SQLITE_DONE || pCur->rc==SQLITE_ROW) ? SQLITE_OK : pCur->rc;
  }
  return rc;
}

/*
** SQLite will invoke this method one or more times while planning a query
** that uses the explain virtual table.  This routine needs to create
** a query plan for each invocation and compute an estimated cost for that
** plan.
*/
static int explainBestIndex(
  sqlite3_vtab *tab,
  sqlite3_index_info *pIdxInfo
){
  int i;

  pIdxInfo->estimatedCost = (double)1000000;
  pIdxInfo->estimatedRows = 500;
  for(i=0; i<pIdxInfo->nConstraint; i++){
    struct sqlite3_index_constraint *p = &pIdxInfo->aConstraint[i];
    if( p->usable
     && p->iColumn==EXPLN_COLUMN_SQL
     && p->op==SQLITE_INDEX_CONSTRAINT_EQ
    ){
      pIdxInfo->estimatedCost = 10.0;
      pIdxInfo->idxNum = 1;
      pIdxInfo->aConstraintUsage[i].argvIndex = 1;
      pIdxInfo->aConstraintUsage[i].omit = 1;
      break;
    }
  }
  return SQLITE_OK;
}

/*
** This following structure defines all the methods for the 
** explain virtual table.
*/
static sqlite3_module explainModule = {
  0,                         /* iVersion */
  0,                         /* xCreate */
  explainConnect,            /* xConnect */
  explainBestIndex,          /* xBestIndex */
  explainDisconnect,         /* xDisconnect */
  0,                         /* xDestroy */
  explainOpen,               /* xOpen - open a cursor */
  explainClose,              /* xClose - close a cursor */
  explainFilter,             /* xFilter - configure scan constraints */
  explainNext,               /* xNext - advance a cursor */
  explainEof,                /* xEof - check for end of scan */
  explainColumn,             /* xColumn - read data */
  explainRowid,              /* xRowid - read data */
  0,                         /* xUpdate */
  0,                         /* xBegin */
  0,                         /* xSync */
  0,                         /* xCommit */
  0,                         /* xRollback */
  0,                         /* xFindMethod */
  0,                         /* xRename */
  0,                         /* xSavepoint */
  0,                         /* xRelease */
  0,                         /* xRollbackTo */
};

#endif /* SQLITE_OMIT_VIRTUALTABLE */

int sqlite3ExplainVtabInit(sqlite3 *db){
  int rc = SQLITE_OK;
#ifndef SQLITE_OMIT_VIRTUALTABLE
  rc = sqlite3_create_module(db, "explain", &explainModule, 0);
#endif
  return rc;
}

#ifdef _WIN32
__declspec(dllexport)
#endif
int sqlite3_explain_init(
  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  rc = sqlite3ExplainVtabInit(db);
#endif
  return rc;
}

/*
** 2018-09-27
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file demonstrates an eponymous virtual table that returns information
** from sqlite3_status64() and sqlite3_db_status().
**
** Usage example:
**
**     .load ./memstat
**     .mode quote
**     .header on
**     SELECT * FROM memstat;
*/
#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_MEMSTATVTAB)
#if !defined(SQLITEINT_H)
#include "sqlite3ext.h"
#endif
SQLITE_EXTENSION_INIT1
#include <assert.h>
#include <string.h>

#ifndef SQLITE_OMIT_VIRTUALTABLE

/* memstat_vtab is a subclass of sqlite3_vtab which will
** serve as the underlying representation of a memstat virtual table
*/
typedef struct memstat_vtab memstat_vtab;
struct memstat_vtab {
  sqlite3_vtab base;  /* Base class - must be first */
  sqlite3 *db;        /* Database connection for this memstat vtab */
};

/* memstat_cursor is a subclass of sqlite3_vtab_cursor which will
** serve as the underlying representation of a cursor that scans
** over rows of the result
*/
typedef struct memstat_cursor memstat_cursor;
struct memstat_cursor {
  sqlite3_vtab_cursor base;  /* Base class - must be first */
  sqlite3 *db;               /* Database connection for this cursor */
  int iRowid;                /* Current row in aMemstatColumn[] */
  int iDb;                   /* Which schema we are looking at */
  int nDb;                   /* Number of schemas */
  char **azDb;               /* Names of all schemas */
  sqlite3_int64 aVal[2];     /* Result values */
};

/*
** The memstatConnect() method is invoked to create a new
** memstat_vtab that describes the memstat virtual table.
**
** Think of this routine as the constructor for memstat_vtab objects.
**
** All this routine needs to do is:
**
**    (1) Allocate the memstat_vtab object and initialize all fields.
**
**    (2) Tell SQLite (via the sqlite3_declare_vtab() interface) what the
**        result set of queries against memstat will look like.
*/
static int memstatConnect(
  sqlite3 *db,
  void *pAux,
  int argc, const char *const*argv,
  sqlite3_vtab **ppVtab,
  char **pzErr
){
  memstat_vtab *pNew;
  int rc;

/* Column numbers */
#define MSV_COLUMN_NAME    0   /* Name of quantity being measured */
#define MSV_COLUMN_SCHEMA  1   /* schema name */
#define MSV_COLUMN_VALUE   2   /* Current value */
#define MSV_COLUMN_HIWTR   3   /* Highwater mark */

  rc = sqlite3_declare_vtab(db,"CREATE TABLE x(name,schema,value,hiwtr)");
  if( rc==SQLITE_OK ){
    pNew = sqlite3_malloc( sizeof(*pNew) );
    *ppVtab = (sqlite3_vtab*)pNew;
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
    pNew->db = db;
  }
  return rc;
}

/*
** This method is the destructor for memstat_cursor objects.
*/
static int memstatDisconnect(sqlite3_vtab *pVtab){
  sqlite3_free(pVtab);
  return SQLITE_OK;
}

/*
** Constructor for a new memstat_cursor object.
*/
static int memstatOpen(sqlite3_vtab *p, sqlite3_vtab_cursor **ppCursor){
  memstat_cursor *pCur;
  pCur = sqlite3_malloc( sizeof(*pCur) );
  if( pCur==0 ) return SQLITE_NOMEM;
  memset(pCur, 0, sizeof(*pCur));
  pCur->db = ((memstat_vtab*)p)->db;
  *ppCursor = &pCur->base;
  return SQLITE_OK;
}

/*
** Clear all the schema names from a cursor
*/
static void memstatClearSchema(memstat_cursor *pCur){
  int i;
  if( pCur->azDb==0 ) return;
  for(i=0; i<pCur->nDb; i++){
    sqlite3_free(pCur->azDb[i]);
  }
  sqlite3_free(pCur->azDb);
  pCur->azDb = 0;
  pCur->nDb = 0;
}

/*
** Fill in the azDb[] array for the cursor.
*/
static int memstatFindSchemas(memstat_cursor *pCur){
  sqlite3_stmt *pStmt = 0;
  int rc;
  if( pCur->nDb ) return SQLITE_OK;
  rc = sqlite3_prepare_v2(pCur->db, "PRAGMA database_list", -1, &pStmt, 0);
  if( rc ){
    sqlite3_finalize(pStmt);
    return rc;
  }
  while( sqlite3_step(pStmt)==SQLITE_ROW ){
    char **az, *z;
    az = sqlite3_realloc(pCur->azDb, sizeof(char*)*(pCur->nDb+1));
    if( az==0 ){
      memstatClearSchema(pCur);
      return SQLITE_NOMEM;
    }
    pCur->azDb = az;
    z = sqlite3_mprintf("%s", sqlite3_column_text(pStmt, 1));
    if( z==0 ){
      memstatClearSchema(pCur);
      return SQLITE_NOMEM;
    }
    pCur->azDb[pCur->nDb] = z;
    pCur->nDb++;
  }
  sqlite3_finalize(pStmt);
  return SQLITE_OK;
}


/*
** Destructor for a memstat_cursor.
*/
static int memstatClose(sqlite3_vtab_cursor *cur){
  memstat_cursor *pCur = (memstat_cursor*)cur;
  memstatClearSchema(pCur);
  sqlite3_free(cur);
  return SQLITE_OK;
}


/*
** Allowed values for aMemstatColumn[].eType
*/
#define MSV_GSTAT   0          /* sqlite3_status64() information */
#define MSV_DB      1          /* sqlite3_db_status() information */
#define MSV_ZIPVFS  2          /* ZIPVFS file-control with 64-bit return */

/*
** An array of quantities that can be measured and reported by
** this virtual table
*/
static const struct MemstatColumns {
  const char *zName;    /* Symbolic name */
  unsigned char eType;  /* Type of interface */
  unsigned char mNull;  /* Bitmask of which columns are NULL */
                        /* 2: dbname,  4: current,  8: hiwtr */
  int eOp;              /* Opcode */
} aMemstatColumn[] = {
 {"MEMORY_USED",            MSV_GSTAT,  2, SQLITE_STATUS_MEMORY_USED          },
 {"MALLOC_SIZE",            MSV_GSTAT,  6, SQLITE_STATUS_MALLOC_SIZE          },
 {"MALLOC_COUNT",           MSV_GSTAT,  2, SQLITE_STATUS_MALLOC_COUNT         },
 {"PAGECACHE_USED",         MSV_GSTAT,  2, SQLITE_STATUS_PAGECACHE_USED       },
 {"PAGECACHE_OVERFLOW",     MSV_GSTAT,  2, SQLITE_STATUS_PAGECACHE_OVERFLOW   },
 {"PAGECACHE_SIZE",         MSV_GSTAT,  6, SQLITE_STATUS_PAGECACHE_SIZE       },
 {"PARSER_STACK",           MSV_GSTAT,  6, SQLITE_STATUS_PARSER_STACK         },
 {"DB_LOOKASIDE_USED",      MSV_DB,     2, SQLITE_DBSTATUS_LOOKASIDE_USED     },
 {"DB_LOOKASIDE_HIT",       MSV_DB,     6, SQLITE_DBSTATUS_LOOKASIDE_HIT      },
 {"DB_LOOKASIDE_MISS_SIZE", MSV_DB,     6, SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE},
 {"DB_LOOKASIDE_MISS_FULL", MSV_DB,     6, SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL},
 {"DB_CACHE_USED",          MSV_DB,    10, SQLITE_DBSTATUS_CACHE_USED         },
#if SQLITE_VERSION_NUMBER >= 3140000
 {"DB_CACHE_USED_SHARED",   MSV_DB,    10, SQLITE_DBSTATUS_CACHE_USED_SHARED  },
#endif
 {"DB_SCHEMA_USED",         MSV_DB,    10, SQLITE_DBSTATUS_SCHEMA_USED        },
 {"DB_STMT_USED",           MSV_DB,    10, SQLITE_DBSTATUS_STMT_USED          },
 {"DB_CACHE_HIT",           MSV_DB,    10, SQLITE_DBSTATUS_CACHE_HIT          },
 {"DB_CACHE_MISS",          MSV_DB,    10, SQLITE_DBSTATUS_CACHE_MISS         },
 {"DB_CACHE_WRITE",         MSV_DB,    10, SQLITE_DBSTATUS_CACHE_WRITE        },
#if SQLITE_VERSION_NUMBER >= 3230000
 {"DB_CACHE_SPILL",         MSV_DB,    10, SQLITE_DBSTATUS_CACHE_SPILL        },
#endif
 {"DB_DEFERRED_FKS",        MSV_DB,    10, SQLITE_DBSTATUS_DEFERRED_FKS       },
#ifdef SQLITE_ENABLE_ZIPVFS
 {"ZIPVFS_CACHE_USED",      MSV_ZIPVFS, 8, 231454 },
 {"ZIPVFS_CACHE_HIT",       MSV_ZIPVFS, 8, 231455 },
 {"ZIPVFS_CACHE_MISS",      MSV_ZIPVFS, 8, 231456 },
 {"ZIPVFS_CACHE_WRITE",     MSV_ZIPVFS, 8, 231457 },
 {"ZIPVFS_DIRECT_READ",     MSV_ZIPVFS, 8, 231458 },
 {"ZIPVFS_DIRECT_BYTES",    MSV_ZIPVFS, 8, 231459 },
#endif /* SQLITE_ENABLE_ZIPVFS */
};
#define MSV_NROW (sizeof(aMemstatColumn)/sizeof(aMemstatColumn[0]))

/*
** Advance a memstat_cursor to its next row of output.
*/
static int memstatNext(sqlite3_vtab_cursor *cur){
  memstat_cursor *pCur = (memstat_cursor*)cur;
  int i;
  assert( pCur->iRowid<=MSV_NROW );
  while(1){
    i = (int)pCur->iRowid - 1;
    if( i<0 || (aMemstatColumn[i].mNull & 2)!=0 || (++pCur->iDb)>=pCur->nDb ){
      pCur->iRowid++;
      if( pCur->iRowid>MSV_NROW ) return SQLITE_OK;  /* End of the table */
      pCur->iDb = 0;
      i++;
    }
    pCur->aVal[0] = 0;
    pCur->aVal[1] = 0;    
    switch( aMemstatColumn[i].eType ){
      case MSV_GSTAT: {
        if( sqlite3_libversion_number()>=3010000 ){
          sqlite3_status64(aMemstatColumn[i].eOp,
                           &pCur->aVal[0], &pCur->aVal[1],0);
        }else{
          int xCur, xHiwtr;
          sqlite3_status(aMemstatColumn[i].eOp, &xCur, &xHiwtr, 0);
          pCur->aVal[0] = xCur;
          pCur->aVal[1] = xHiwtr;
        }
        break;
      }
      case MSV_DB: {
        int xCur, xHiwtr;
        sqlite3_db_status(pCur->db, aMemstatColumn[i].eOp, &xCur, &xHiwtr, 0);
        pCur->aVal[0] = xCur;
        pCur->aVal[1] = xHiwtr;
        break;
      }
      case MSV_ZIPVFS: {
        int rc;
        rc = sqlite3_file_control(pCur->db, pCur->azDb[pCur->iDb],
                                  aMemstatColumn[i].eOp, (void*)&pCur->aVal[0]);
        if( rc!=SQLITE_OK ) continue;
        break;
      }
    }
    break;
  }
  return SQLITE_OK;
}
  

/*
** Return values of columns for the row at which the memstat_cursor
** is currently pointing.
*/
static int memstatColumn(
  sqlite3_vtab_cursor *cur,   /* The cursor */
  sqlite3_context *ctx,       /* First argument to sqlite3_result_...() */
  int iCol                    /* Which column to return */
){
  memstat_cursor *pCur = (memstat_cursor*)cur;
  int i;
  assert( pCur->iRowid>0 && pCur->iRowid<=MSV_NROW );
  i = (int)pCur->iRowid - 1;
  if( (aMemstatColumn[i].mNull & (1<<iCol))!=0 ){
    return SQLITE_OK;
  }
  switch( iCol ){
    case MSV_COLUMN_NAME: {
      sqlite3_result_text(ctx, aMemstatColumn[i].zName, -1, SQLITE_STATIC);
      break;
    }
    case MSV_COLUMN_SCHEMA: {
      sqlite3_result_text(ctx, pCur->azDb[pCur->iDb], -1, 0);
      break;
    }
    case MSV_COLUMN_VALUE: {
      sqlite3_result_int64(ctx, pCur->aVal[0]);
      break;
    }
    case MSV_COLUMN_HIWTR: {
      sqlite3_result_int64(ctx, pCur->aVal[1]);
      break;
    }
  }
  return SQLITE_OK;
}

/*
** Return the rowid for the current row.  In this implementation, the
** rowid is the same as the output value.
*/
static int memstatRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){
  memstat_cursor *pCur = (memstat_cursor*)cur;
  *pRowid = pCur->iRowid*1000 + pCur->iDb;
  return SQLITE_OK;
}

/*
** Return TRUE if the cursor has been moved off of the last
** row of output.
*/
static int memstatEof(sqlite3_vtab_cursor *cur){
  memstat_cursor *pCur = (memstat_cursor*)cur;
  return pCur->iRowid>MSV_NROW;
}

/*
** This method is called to "rewind" the memstat_cursor object back
** to the first row of output.  This method is always called at least
** once prior to any call to memstatColumn() or memstatRowid() or 
** memstatEof().
*/
static int memstatFilter(
  sqlite3_vtab_cursor *pVtabCursor, 
  int idxNum, const char *idxStr,
  int argc, sqlite3_value **argv
){
  memstat_cursor *pCur = (memstat_cursor *)pVtabCursor;
  int rc = memstatFindSchemas(pCur);
  if( rc ) return rc;
  pCur->iRowid = 0;
  pCur->iDb = 0;
  return memstatNext(pVtabCursor);
}

/*
** SQLite will invoke this method one or more times while planning a query
** that uses the memstat virtual table.  This routine needs to create
** a query plan for each invocation and compute an estimated cost for that
** plan.
*/
static int memstatBestIndex(
  sqlite3_vtab *tab,
  sqlite3_index_info *pIdxInfo
){
  pIdxInfo->estimatedCost = (double)500;
  pIdxInfo->estimatedRows = 500;
  return SQLITE_OK;
}

/*
** This following structure defines all the methods for the 
** memstat virtual table.
*/
static sqlite3_module memstatModule = {
  0,                         /* iVersion */
  0,                         /* xCreate */
  memstatConnect,            /* xConnect */
  memstatBestIndex,          /* xBestIndex */
  memstatDisconnect,         /* xDisconnect */
  0,                         /* xDestroy */
  memstatOpen,               /* xOpen - open a cursor */
  memstatClose,              /* xClose - close a cursor */
  memstatFilter,             /* xFilter - configure scan constraints */
  memstatNext,               /* xNext - advance a cursor */
  memstatEof,                /* xEof - check for end of scan */
  memstatColumn,             /* xColumn - read data */
  memstatRowid,              /* xRowid - read data */
  0,                         /* xUpdate */
  0,                         /* xBegin */
  0,                         /* xSync */
  0,                         /* xCommit */
  0,                         /* xRollback */
  0,                         /* xFindMethod */
  0,                         /* xRename */
  0,                         /* xSavepoint */
  0,                         /* xRelease */
  0,                         /* xRollbackTo */
};

#endif /* SQLITE_OMIT_VIRTUALTABLE */

int sqlite3MemstatVtabInit(sqlite3 *db){
  int rc = SQLITE_OK;
#ifndef SQLITE_OMIT_VIRTUALTABLE
  rc = sqlite3_create_module(db, "sqlite_memstat", &memstatModule, 0);
#endif
  return rc;
}

#ifndef SQLITE_CORE
#ifdef _WIN32
__declspec(dllexport)
#endif
int sqlite3_memstat_init(
  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  rc = sqlite3MemstatVtabInit(db);
#endif
  return rc;
}
#endif /* SQLITE_CORE */
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_MEMSTATVTAB) */

**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This SQLite extension implements a functions that compute SHA1 hashes.
** Two SQL functions are implemented:
**
**     sha1(X)
**     sha1_query(Y)
**
** The sha1(X) function computes the SHA1 hash of the input X, or NULL if
** X is NULL.

**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This SQLite extension implements functions that compute SHA1 hashes.
** Two SQL functions are implemented:
**
**     sha1(X)
**     sha1_query(Y)
**
** The sha1(X) function computes the SHA1 hash of the input X, or NULL if
** X is NULL.

**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This SQLite extension implements a functions that compute SHA1 hashes.
** Two SQL functions are implemented:
**
**     sha3(X,SIZE)
**     sha3_query(Y,SIZE)
**
** The sha3(X) function computes the SHA3 hash of the input X, or NULL if
** X is NULL.

**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This SQLite extension implements functions that compute SHA3 hashes.
** Two SQL functions are implemented:
**
**     sha3(X,SIZE)
**     sha3_query(Y,SIZE)
**
** The sha3(X) function computes the SHA3 hash of the input X, or NULL if
** X is NULL.

  return nChar;
}

typedef struct Transliteration Transliteration;
struct Transliteration {
 unsigned short int cFrom;
 unsigned char cTo0, cTo1, cTo2, cTo3;



};

/*
** Table of translations from unicode characters into ASCII.
*/
static const Transliteration translit[] = {
  { 0x00A0,  0x20, 0x00, 0x00, 0x00 },  /*   to   */
................................................................................
**
** The returned string might contain more characters than the input.
**
** Space to hold the returned string comes from sqlite3_malloc() and
** should be freed by the caller.
*/
static unsigned char *transliterate(const unsigned char *zIn, int nIn){



  unsigned char *zOut = sqlite3_malloc64( nIn*4 + 1 );

  int c, sz, nOut;
  if( zOut==0 ) return 0;
  nOut = 0;
  while( nIn>0 ){
    c = utf8Read(zIn, nIn, &sz);
    zIn += sz;
    nIn -= sz;
................................................................................
          zOut[nOut++] = tbl[x].cTo0;
          if( tbl[x].cTo1 ){
            zOut[nOut++] = tbl[x].cTo1;
            if( tbl[x].cTo2 ){
              zOut[nOut++] = tbl[x].cTo2;
              if( tbl[x].cTo3 ){
                zOut[nOut++] = tbl[x].cTo3;





              }
            }
          }
          c = 0;
          break;
        }else if( tbl[x].cFrom>c ){
          xTop = x-1;

  return nChar;
}

typedef struct Transliteration Transliteration;
struct Transliteration {
 unsigned short int cFrom;
 unsigned char cTo0, cTo1, cTo2, cTo3;
#ifdef SQLITE_SPELLFIX_5BYTE_MAPPINGS
 unsigned char cTo4;
#endif
};

/*
** Table of translations from unicode characters into ASCII.
*/
static const Transliteration translit[] = {
  { 0x00A0,  0x20, 0x00, 0x00, 0x00 },  /*   to   */
................................................................................
**
** The returned string might contain more characters than the input.
**
** Space to hold the returned string comes from sqlite3_malloc() and
** should be freed by the caller.
*/
static unsigned char *transliterate(const unsigned char *zIn, int nIn){
#ifdef SQLITE_SPELLFIX_5BYTE_MAPPINGS
  unsigned char *zOut = sqlite3_malloc64( nIn*5 + 1 );
#else
  unsigned char *zOut = sqlite3_malloc64( nIn*4 + 1 );
#endif
  int c, sz, nOut;
  if( zOut==0 ) return 0;
  nOut = 0;
  while( nIn>0 ){
    c = utf8Read(zIn, nIn, &sz);
    zIn += sz;
    nIn -= sz;
................................................................................
          zOut[nOut++] = tbl[x].cTo0;
          if( tbl[x].cTo1 ){
            zOut[nOut++] = tbl[x].cTo1;
            if( tbl[x].cTo2 ){
              zOut[nOut++] = tbl[x].cTo2;
              if( tbl[x].cTo3 ){
                zOut[nOut++] = tbl[x].cTo3;
#ifdef SQLITE_SPELLFIX_5BYTE_MAPPINGS
                if( tbl[x].cTo4 ){
                  zOut[nOut++] = tbl[x].cTo4;
                }
#endif /* SQLITE_SPELLFIX_5BYTE_MAPPINGS */
              }
            }
          }
          c = 0;
          break;
        }else if( tbl[x].cFrom>c ){
          xTop = x-1;

** space used by the RBU handle.
*/
struct rbu_vfs {
  sqlite3_vfs base;               /* rbu VFS shim methods */
  sqlite3_vfs *pRealVfs;          /* Underlying VFS */
  sqlite3_mutex *mutex;           /* Mutex to protect pMain */
  sqlite3rbu *pRbu;               /* Owner RBU object */
  rbu_file *pMain;                /* Linked list of main db files */

};

/*
** Each file opened by an rbu VFS is represented by an instance of
** the following structure.
**
** If this is a temporary file (pRbu!=0 && flags&DELETE_ON_CLOSE), variable
................................................................................
  int nShm;                       /* Number of entries in apShm[] array */
  char **apShm;                   /* Array of mmap'd *-shm regions */
  char *zDel;                     /* Delete this when closing file */

  const char *zWal;               /* Wal filename for this main db file */
  rbu_file *pWalFd;               /* Wal file descriptor for this main db */
  rbu_file *pMainNext;            /* Next MAIN_DB file */

};

/*
** True for an RBU vacuum handle, or false otherwise.
*/
#define rbuIsVacuum(p) ((p)->zTarget==0)

................................................................................
  i64 nDiff = nNew - pFd->sz;
  pRbu->szTemp += nDiff;
  pFd->sz = nNew;
  assert( pRbu->szTemp>=0 );
  if( pRbu->szTempLimit && pRbu->szTemp>pRbu->szTempLimit ) return SQLITE_FULL;
  return SQLITE_OK;
}
































































/*
** Close an rbu file.
*/
static int rbuVfsClose(sqlite3_file *pFile){
  rbu_file *p = (rbu_file*)pFile;
  int rc;
................................................................................
    sqlite3_free(p->apShm[i]);
  }
  sqlite3_free(p->apShm);
  p->apShm = 0;
  sqlite3_free(p->zDel);

  if( p->openFlags & SQLITE_OPEN_MAIN_DB ){
    rbu_file **pp;
    sqlite3_mutex_enter(p->pRbuVfs->mutex);
    for(pp=&p->pRbuVfs->pMain; *pp!=p; pp=&((*pp)->pMainNext));
    *pp = p->pMainNext;
    sqlite3_mutex_leave(p->pRbuVfs->mutex);
    rbuUnlockShm(p);
    p->pReal->pMethods->xShmUnmap(p->pReal, 0);
  }
  else if( (p->openFlags & SQLITE_OPEN_DELETEONCLOSE) && p->pRbu ){
    rbuUpdateTempSize(p, 0);
  }


  /* Close the underlying file handle */
  rc = p->pReal->pMethods->xClose(p->pReal);
  return rc;
}


................................................................................
      rc = xControl(p->pReal, SQLITE_FCNTL_ZIPVFS, &dummy);
      if( rc==SQLITE_OK ){
        rc = SQLITE_ERROR;
        pRbu->zErrmsg = sqlite3_mprintf("rbu/zipvfs setup error");
      }else if( rc==SQLITE_NOTFOUND ){
        pRbu->pTargetFd = p;
        p->pRbu = pRbu;



        if( p->pWalFd ) p->pWalFd->pRbu = pRbu;
        rc = SQLITE_OK;
      }
    }
    return rc;
  }
  else if( op==SQLITE_FCNTL_RBUCNT ){
................................................................................
    /* Release the checkpointer and writer locks */
    rbuUnlockShm(p);
    rc = p->pReal->pMethods->xShmUnmap(p->pReal, delFlag);
  }
  return rc;
}

/*
** Given that zWal points to a buffer containing a wal file name passed to 
** either the xOpen() or xAccess() VFS method, return a pointer to the
** file-handle opened by the same database connection on the corresponding
** database file.
*/
static rbu_file *rbuFindMaindb(rbu_vfs *pRbuVfs, const char *zWal){
  rbu_file *pDb;
  sqlite3_mutex_enter(pRbuVfs->mutex);
  for(pDb=pRbuVfs->pMain; pDb && pDb->zWal!=zWal; pDb=pDb->pMainNext){}
  sqlite3_mutex_leave(pRbuVfs->mutex);
  return pDb;
}

/* 
** A main database named zName has just been opened. The following 
** function returns a pointer to a buffer owned by SQLite that contains
** the name of the *-wal file this db connection will use. SQLite
** happens to pass a pointer to this buffer when using xAccess()
** or xOpen() to operate on the *-wal file.  
*/
................................................................................
      ** (pFd->zWal) to point to a buffer owned by SQLite that contains
      ** the name of the *-wal file this db connection will use. SQLite
      ** happens to pass a pointer to this buffer when using xAccess()
      ** or xOpen() to operate on the *-wal file.  */
      pFd->zWal = rbuMainToWal(zName, flags);
    }
    else if( flags & SQLITE_OPEN_WAL ){
      rbu_file *pDb = rbuFindMaindb(pRbuVfs, zName);
      if( pDb ){
        if( pDb->pRbu && pDb->pRbu->eStage==RBU_STAGE_OAL ){
          /* This call is to open a *-wal file. Intead, open the *-oal. This
          ** code ensures that the string passed to xOpen() is terminated by a
          ** pair of '\0' bytes in case the VFS attempts to extract a URI 
          ** parameter from it.  */
          const char *zBase = zName;
................................................................................
  }
  if( pFd->pReal->pMethods ){
    /* The xOpen() operation has succeeded. Set the sqlite3_file.pMethods
    ** pointer and, if the file is a main database file, link it into the
    ** mutex protected linked list of all such files.  */
    pFile->pMethods = &rbuvfs_io_methods;
    if( flags & SQLITE_OPEN_MAIN_DB ){
      sqlite3_mutex_enter(pRbuVfs->mutex);
      pFd->pMainNext = pRbuVfs->pMain;
      pRbuVfs->pMain = pFd;
      sqlite3_mutex_leave(pRbuVfs->mutex);
    }
  }else{
    sqlite3_free(pFd->zDel);
  }

  return rc;
}
................................................................................
  **
  **   b) if the *-wal file does not exist, claim that it does anyway,
  **      causing SQLite to call xOpen() to open it. This call will also
  **      be intercepted (see the rbuVfsOpen() function) and the *-oal
  **      file opened instead.
  */
  if( rc==SQLITE_OK && flags==SQLITE_ACCESS_EXISTS ){
    rbu_file *pDb = rbuFindMaindb(pRbuVfs, zPath);
    if( pDb && pDb->pRbu && pDb->pRbu->eStage==RBU_STAGE_OAL ){
      if( *pResOut ){
        rc = SQLITE_CANTOPEN;
      }else{
        sqlite3_int64 sz = 0;
        rc = rbuVfsFileSize(&pDb->base, &sz);
        *pResOut = (sz>0);

** space used by the RBU handle.
*/
struct rbu_vfs {
  sqlite3_vfs base;               /* rbu VFS shim methods */
  sqlite3_vfs *pRealVfs;          /* Underlying VFS */
  sqlite3_mutex *mutex;           /* Mutex to protect pMain */
  sqlite3rbu *pRbu;               /* Owner RBU object */
  rbu_file *pMain;                /* List of main db files */
  rbu_file *pMainRbu;             /* List of main db files with pRbu!=0 */
};

/*
** Each file opened by an rbu VFS is represented by an instance of
** the following structure.
**
** If this is a temporary file (pRbu!=0 && flags&DELETE_ON_CLOSE), variable
................................................................................
  int nShm;                       /* Number of entries in apShm[] array */
  char **apShm;                   /* Array of mmap'd *-shm regions */
  char *zDel;                     /* Delete this when closing file */

  const char *zWal;               /* Wal filename for this main db file */
  rbu_file *pWalFd;               /* Wal file descriptor for this main db */
  rbu_file *pMainNext;            /* Next MAIN_DB file */
  rbu_file *pMainRbuNext;         /* Next MAIN_DB file with pRbu!=0 */
};

/*
** True for an RBU vacuum handle, or false otherwise.
*/
#define rbuIsVacuum(p) ((p)->zTarget==0)

................................................................................
  i64 nDiff = nNew - pFd->sz;
  pRbu->szTemp += nDiff;
  pFd->sz = nNew;
  assert( pRbu->szTemp>=0 );
  if( pRbu->szTempLimit && pRbu->szTemp>pRbu->szTempLimit ) return SQLITE_FULL;
  return SQLITE_OK;
}

/*
** Add an item to the main-db lists, if it is not already present.
**
** There are two main-db lists. One for all file descriptors, and one
** for all file descriptors with rbu_file.pDb!=0. If the argument has
** rbu_file.pDb!=0, then it is assumed to already be present on the
** main list and is only added to the pDb!=0 list.
*/
static void rbuMainlistAdd(rbu_file *p){
  rbu_vfs *pRbuVfs = p->pRbuVfs;
  rbu_file *pIter;
  assert( (p->openFlags & SQLITE_OPEN_MAIN_DB) );
  sqlite3_mutex_enter(pRbuVfs->mutex);
  if( p->pRbu==0 ){
    for(pIter=pRbuVfs->pMain; pIter; pIter=pIter->pMainNext);
    p->pMainNext = pRbuVfs->pMain;
    pRbuVfs->pMain = p;
  }else{
    for(pIter=pRbuVfs->pMainRbu; pIter && pIter!=p; pIter=pIter->pMainRbuNext){}
    if( pIter==0 ){
      p->pMainRbuNext = pRbuVfs->pMainRbu;
      pRbuVfs->pMainRbu = p;
    }
  }
  sqlite3_mutex_leave(pRbuVfs->mutex);
}

/*
** Remove an item from the main-db lists.
*/
static void rbuMainlistRemove(rbu_file *p){
  rbu_file **pp;
  sqlite3_mutex_enter(p->pRbuVfs->mutex);
  for(pp=&p->pRbuVfs->pMain; *pp && *pp!=p; pp=&((*pp)->pMainNext)){}
  if( *pp ) *pp = p->pMainNext;
  p->pMainNext = 0;
  for(pp=&p->pRbuVfs->pMainRbu; *pp && *pp!=p; pp=&((*pp)->pMainRbuNext)){}
  if( *pp ) *pp = p->pMainRbuNext;
  p->pMainRbuNext = 0;
  sqlite3_mutex_leave(p->pRbuVfs->mutex);
}

/*
** Given that zWal points to a buffer containing a wal file name passed to 
** either the xOpen() or xAccess() VFS method, search the main-db list for
** a file-handle opened by the same database connection on the corresponding
** database file.
**
** If parameter bRbu is true, only search for file-descriptors with
** rbu_file.pDb!=0.
*/
static rbu_file *rbuFindMaindb(rbu_vfs *pRbuVfs, const char *zWal, int bRbu){
  rbu_file *pDb;
  sqlite3_mutex_enter(pRbuVfs->mutex);
  if( bRbu ){
    for(pDb=pRbuVfs->pMainRbu; pDb && pDb->zWal!=zWal; pDb=pDb->pMainRbuNext){}
  }else{
    for(pDb=pRbuVfs->pMain; pDb && pDb->zWal!=zWal; pDb=pDb->pMainNext){}
  }
  sqlite3_mutex_leave(pRbuVfs->mutex);
  return pDb;
}

/*
** Close an rbu file.
*/
static int rbuVfsClose(sqlite3_file *pFile){
  rbu_file *p = (rbu_file*)pFile;
  int rc;
................................................................................
    sqlite3_free(p->apShm[i]);
  }
  sqlite3_free(p->apShm);
  p->apShm = 0;
  sqlite3_free(p->zDel);

  if( p->openFlags & SQLITE_OPEN_MAIN_DB ){
    rbuMainlistRemove(p);




    rbuUnlockShm(p);
    p->pReal->pMethods->xShmUnmap(p->pReal, 0);
  }
  else if( (p->openFlags & SQLITE_OPEN_DELETEONCLOSE) && p->pRbu ){
    rbuUpdateTempSize(p, 0);
  }
  assert( p->pMainNext==0 && p->pRbuVfs->pMain!=p );

  /* Close the underlying file handle */
  rc = p->pReal->pMethods->xClose(p->pReal);
  return rc;
}


................................................................................
      rc = xControl(p->pReal, SQLITE_FCNTL_ZIPVFS, &dummy);
      if( rc==SQLITE_OK ){
        rc = SQLITE_ERROR;
        pRbu->zErrmsg = sqlite3_mprintf("rbu/zipvfs setup error");
      }else if( rc==SQLITE_NOTFOUND ){
        pRbu->pTargetFd = p;
        p->pRbu = pRbu;
        if( p->openFlags & SQLITE_OPEN_MAIN_DB ){
          rbuMainlistAdd(p);
        }
        if( p->pWalFd ) p->pWalFd->pRbu = pRbu;
        rc = SQLITE_OK;
      }
    }
    return rc;
  }
  else if( op==SQLITE_FCNTL_RBUCNT ){
................................................................................
    /* Release the checkpointer and writer locks */
    rbuUnlockShm(p);
    rc = p->pReal->pMethods->xShmUnmap(p->pReal, delFlag);
  }
  return rc;
}















/* 
** A main database named zName has just been opened. The following 
** function returns a pointer to a buffer owned by SQLite that contains
** the name of the *-wal file this db connection will use. SQLite
** happens to pass a pointer to this buffer when using xAccess()
** or xOpen() to operate on the *-wal file.  
*/
................................................................................
      ** (pFd->zWal) to point to a buffer owned by SQLite that contains
      ** the name of the *-wal file this db connection will use. SQLite
      ** happens to pass a pointer to this buffer when using xAccess()
      ** or xOpen() to operate on the *-wal file.  */
      pFd->zWal = rbuMainToWal(zName, flags);
    }
    else if( flags & SQLITE_OPEN_WAL ){
      rbu_file *pDb = rbuFindMaindb(pRbuVfs, zName, 0);
      if( pDb ){
        if( pDb->pRbu && pDb->pRbu->eStage==RBU_STAGE_OAL ){
          /* This call is to open a *-wal file. Intead, open the *-oal. This
          ** code ensures that the string passed to xOpen() is terminated by a
          ** pair of '\0' bytes in case the VFS attempts to extract a URI 
          ** parameter from it.  */
          const char *zBase = zName;
................................................................................
  }
  if( pFd->pReal->pMethods ){
    /* The xOpen() operation has succeeded. Set the sqlite3_file.pMethods
    ** pointer and, if the file is a main database file, link it into the
    ** mutex protected linked list of all such files.  */
    pFile->pMethods = &rbuvfs_io_methods;
    if( flags & SQLITE_OPEN_MAIN_DB ){
      rbuMainlistAdd(pFd);



    }
  }else{
    sqlite3_free(pFd->zDel);
  }

  return rc;
}
................................................................................
  **
  **   b) if the *-wal file does not exist, claim that it does anyway,
  **      causing SQLite to call xOpen() to open it. This call will also
  **      be intercepted (see the rbuVfsOpen() function) and the *-oal
  **      file opened instead.
  */
  if( rc==SQLITE_OK && flags==SQLITE_ACCESS_EXISTS ){
    rbu_file *pDb = rbuFindMaindb(pRbuVfs, zPath, 1);
    if( pDb && pDb->pRbu && pDb->pRbu->eStage==RBU_STAGE_OAL ){
      if( *pResOut ){
        rc = SQLITE_CANTOPEN;
      }else{
        sqlite3_int64 sz = 0;
        rc = rbuVfsFileSize(&pDb->base, &sz);
        *pResOut = (sz>0);

** each segment is "outside" and the area to the left is "inside".
**
** The on-disk representation consists of a 4-byte header followed by
** the values.  The 4-byte header is:
**
**      encoding    (1 byte)   0=big-endian, 1=little-endian
**      nvertex     (3 bytes)  Number of vertexes as a big-endian integer





*/
typedef struct GeoPoly GeoPoly;
struct GeoPoly {
  int nVertex;          /* Number of vertexes */
  unsigned char hdr[4]; /* Header for on-disk representation */
  GeoCoord a[2];    /* 2*nVertex values. X (longitude) first, then Y */
};






/*
** State of a parse of a GeoJSON input.
*/
typedef struct GeoParse GeoParse;
struct GeoParse {
  const unsigned char *z;   /* Unparsed input */
................................................................................
  t = a[1];
  a[1] = a[2];
  a[2] = t;
}

/* Skip whitespace.  Return the next non-whitespace character. */
static char geopolySkipSpace(GeoParse *p){
  while( p->z[0] && safe_isspace(p->z[0]) ) p->z++;
  return p->z[0];
}

/* Parse out a number.  Write the value into *pVal if pVal!=0.
** return non-zero on success and zero if the next token is not a number.
*/
static int geopolyParseNumber(GeoParse *p, GeoCoord *pVal){
................................................................................
  if( c=='-' ){
    j = 1;
    c = z[j];
  }
  if( c=='0' && z[j+1]>='0' && z[j+1]<='9' ) return 0;
  for(;; j++){
    c = z[j];
    if( c>='0' && c<='9' ) continue;
    if( c=='.' ){
      if( z[j-1]=='-' ) return 0;
      if( seenDP ) return 0;
      seenDP = 1;
      continue;
    }
    if( c=='e' || c=='E' ){
................................................................................
      }
      if( c<'0' || c>'9' ) return 0;
      continue;
    }
    break;
  }
  if( z[j-1]<'0' ) return 0;








  if( pVal ) *pVal = (GeoCoord)atof((const char*)p->z);


  p->z += j;
  return 1;
}

/*
** If the input is a well-formed JSON array of coordinates with at least
** four coordinates and where each coordinate is itself a two-value array,
................................................................................
    }
    if( geopolySkipSpace(&s)==']'
     && s.nVertex>=4
     && s.a[0]==s.a[s.nVertex*2-2]
     && s.a[1]==s.a[s.nVertex*2-1]
     && (s.z++, geopolySkipSpace(&s)==0)
    ){
      int nByte;
      GeoPoly *pOut;
      int x = 1;
      s.nVertex--;  /* Remove the redundant vertex at the end */
      nByte = sizeof(GeoPoly) * s.nVertex*2*sizeof(GeoCoord);
      pOut = sqlite3_malloc64( nByte );
      x = 1;
      if( pOut==0 ) goto parse_json_err;
      pOut->nVertex = s.nVertex;
      memcpy(pOut->a, s.a, s.nVertex*2*sizeof(GeoCoord));
      pOut->hdr[0] = *(unsigned char*)&x;
      pOut->hdr[1] = (s.nVertex>>16)&0xff;
      pOut->hdr[2] = (s.nVertex>>8)&0xff;
................................................................................
      p->a[ii*2+1] = y1;
    }
    sqlite3_result_blob(context, p->hdr, 
       4+8*p->nVertex, SQLITE_TRANSIENT);
    sqlite3_free(p);
  }
}






















/*
** Implementation of the geopoly_area(X) function.
**
** If the input is a well-formed Geopoly BLOB then return the area
** enclosed by the polygon.  If the polygon circulates clockwise instead
** of counterclockwise (as it should) then return the negative of the
................................................................................
static void geopolyAreaFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  GeoPoly *p = geopolyFuncParam(context, argv[0], 0);
  if( p ){
    double rArea = 0.0;

























    int ii;
    for(ii=0; ii<p->nVertex-1; ii++){
      rArea += (p->a[ii*2] - p->a[ii*2+2])           /* (x0 - x1) */
                * (p->a[ii*2+1] + p->a[ii*2+3])      /* (y0 + y1) */
                * 0.5;







    }
    rArea += (p->a[ii*2] - p->a[0])                  /* (xN - x0) */
             * (p->a[ii*2+1] + p->a[1])              /* (yN + y0) */
             * 0.5;

    sqlite3_result_double(context, rArea);

    sqlite3_free(p);
  }            
}



























































/*
** If pPoly is a polygon, compute its bounding box. Then:
**
**    (1) if aCoord!=0 store the bounding box in aCoord, returning NULL
**    (2) otherwise, compute a GeoPoly for the bounding box and return the
**        new GeoPoly
................................................................................
      r = p->a[ii*2+1];
      if( r<mnY ) mnY = (float)r;
      else if( r>mxY ) mxY = (float)r;
    }
    if( pRc ) *pRc = SQLITE_OK;
    if( aCoord==0 ){
      geopolyBboxFill:
      pOut = sqlite3_realloc(p, sizeof(GeoPoly)+sizeof(GeoCoord)*6);
      if( pOut==0 ){
        sqlite3_free(p);
        if( context ) sqlite3_result_error_nomem(context);
        if( pRc ) *pRc = SQLITE_NOMEM;
        return 0;
      }
      pOut->nVertex = 4;
................................................................................
    int jj;
    int nChange = 0;
    sqlite3_bind_int64(pUp, 1, cell.iRowid);
    assert( pRtree->nAux>=1 );
    if( sqlite3_value_nochange(aData[2]) ){
      sqlite3_bind_null(pUp, 2);
    }else{







      sqlite3_bind_value(pUp, 2, aData[2]);


      nChange = 1;
    }
    for(jj=1; jj<pRtree->nAux; jj++){
      nChange++;
      sqlite3_bind_value(pUp, jj+2, aData[jj+2]);
    }
    if( nChange ){
................................................................................
  0,                          /* xRollbackTo */
};

static int sqlite3_geopoly_init(sqlite3 *db){
  int rc = SQLITE_OK;
  static const struct {
    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
    int nArg;

    const char *zName;
  } aFunc[] = {
     { geopolyAreaFunc,          1,    "geopoly_area"             },
     { geopolyBlobFunc,          1,    "geopoly_blob"             },
     { geopolyJsonFunc,          1,    "geopoly_json"             },
     { geopolySvgFunc,          -1,    "geopoly_svg"              },
     { geopolyWithinFunc,        2,    "geopoly_within"           },
     { geopolyContainsPointFunc, 3,    "geopoly_contains_point"   },
     { geopolyOverlapFunc,       2,    "geopoly_overlap"          },
     { geopolyDebugFunc,         1,    "geopoly_debug"            },
     { geopolyBBoxFunc,          1,    "geopoly_bbox"             },
     { geopolyXformFunc,         7,    "geopoly_xform"            },


  };
  static const struct {
    void (*xStep)(sqlite3_context*,int,sqlite3_value**);
    void (*xFinal)(sqlite3_context*);
    const char *zName;
  } aAgg[] = {
     { geopolyBBoxStep, geopolyBBoxFinal, "geopoly_group_bbox"    },
  };
  int i;
  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){

    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
                                 SQLITE_UTF8, 0,
                                 aFunc[i].xFunc, 0, 0);
  }
  for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_function(db, aAgg[i].zName, 1, SQLITE_UTF8, 0,
                                 0, aAgg[i].xStep, aAgg[i].xFinal);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_module_v2(db, "geopoly", &geopolyModule, 0, 0);
  }
  return rc;
}

** each segment is "outside" and the area to the left is "inside".
**
** The on-disk representation consists of a 4-byte header followed by
** the values.  The 4-byte header is:
**
**      encoding    (1 byte)   0=big-endian, 1=little-endian
**      nvertex     (3 bytes)  Number of vertexes as a big-endian integer
**
** Enough space is allocated for 4 coordinates, to work around over-zealous
** warnings coming from some compiler (notably, clang). In reality, the size
** of each GeoPoly memory allocate is adjusted as necessary so that the
** GeoPoly.a[] array at the end is the appropriate size.
*/
typedef struct GeoPoly GeoPoly;
struct GeoPoly {
  int nVertex;          /* Number of vertexes */
  unsigned char hdr[4]; /* Header for on-disk representation */
  GeoCoord a[8];        /* 2*nVertex values. X (longitude) first, then Y */
};

/* The size of a memory allocation needed for a GeoPoly object sufficient
** to hold N coordinate pairs.
*/
#define GEOPOLY_SZ(N)  (sizeof(GeoPoly) + sizeof(GeoCoord)*2*((N)-4))

/*
** State of a parse of a GeoJSON input.
*/
typedef struct GeoParse GeoParse;
struct GeoParse {
  const unsigned char *z;   /* Unparsed input */
................................................................................
  t = a[1];
  a[1] = a[2];
  a[2] = t;
}

/* Skip whitespace.  Return the next non-whitespace character. */
static char geopolySkipSpace(GeoParse *p){
  while( safe_isspace(p->z[0]) ) p->z++;
  return p->z[0];
}

/* Parse out a number.  Write the value into *pVal if pVal!=0.
** return non-zero on success and zero if the next token is not a number.
*/
static int geopolyParseNumber(GeoParse *p, GeoCoord *pVal){
................................................................................
  if( c=='-' ){
    j = 1;
    c = z[j];
  }
  if( c=='0' && z[j+1]>='0' && z[j+1]<='9' ) return 0;
  for(;; j++){
    c = z[j];
    if( safe_isdigit(c) ) continue;
    if( c=='.' ){
      if( z[j-1]=='-' ) return 0;
      if( seenDP ) return 0;
      seenDP = 1;
      continue;
    }
    if( c=='e' || c=='E' ){
................................................................................
      }
      if( c<'0' || c>'9' ) return 0;
      continue;
    }
    break;
  }
  if( z[j-1]<'0' ) return 0;
  if( pVal ){
#ifdef SQLITE_AMALGAMATION
     /* The sqlite3AtoF() routine is much much faster than atof(), if it
     ** is available */
     double r;
     (void)sqlite3AtoF((const char*)p->z, &r, j, SQLITE_UTF8);
     *pVal = r;
#else
     *pVal = (GeoCoord)atof((const char*)p->z);
#endif
  }
  p->z += j;
  return 1;
}

/*
** If the input is a well-formed JSON array of coordinates with at least
** four coordinates and where each coordinate is itself a two-value array,
................................................................................
    }
    if( geopolySkipSpace(&s)==']'
     && s.nVertex>=4
     && s.a[0]==s.a[s.nVertex*2-2]
     && s.a[1]==s.a[s.nVertex*2-1]
     && (s.z++, geopolySkipSpace(&s)==0)
    ){

      GeoPoly *pOut;
      int x = 1;
      s.nVertex--;  /* Remove the redundant vertex at the end */

      pOut = sqlite3_malloc64( GEOPOLY_SZ(s.nVertex) );
      x = 1;
      if( pOut==0 ) goto parse_json_err;
      pOut->nVertex = s.nVertex;
      memcpy(pOut->a, s.a, s.nVertex*2*sizeof(GeoCoord));
      pOut->hdr[0] = *(unsigned char*)&x;
      pOut->hdr[1] = (s.nVertex>>16)&0xff;
      pOut->hdr[2] = (s.nVertex>>8)&0xff;
................................................................................
      p->a[ii*2+1] = y1;
    }
    sqlite3_result_blob(context, p->hdr, 
       4+8*p->nVertex, SQLITE_TRANSIENT);
    sqlite3_free(p);
  }
}

/*
** Compute the area enclosed by the polygon.
**
** This routine can also be used to detect polygons that rotate in
** the wrong direction.  Polygons are suppose to be counter-clockwise (CCW).
** This routine returns a negative value for clockwise (CW) polygons.
*/
static double geopolyArea(GeoPoly *p){
  double rArea = 0.0;
  int ii;
  for(ii=0; ii<p->nVertex-1; ii++){
    rArea += (p->a[ii*2] - p->a[ii*2+2])           /* (x0 - x1) */
              * (p->a[ii*2+1] + p->a[ii*2+3])      /* (y0 + y1) */
              * 0.5;
  }
  rArea += (p->a[ii*2] - p->a[0])                  /* (xN - x0) */
           * (p->a[ii*2+1] + p->a[1])              /* (yN + y0) */
           * 0.5;
  return rArea;
}

/*
** Implementation of the geopoly_area(X) function.
**
** If the input is a well-formed Geopoly BLOB then return the area
** enclosed by the polygon.  If the polygon circulates clockwise instead
** of counterclockwise (as it should) then return the negative of the
................................................................................
static void geopolyAreaFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  GeoPoly *p = geopolyFuncParam(context, argv[0], 0);
  if( p ){
    sqlite3_result_double(context, geopolyArea(p));
    sqlite3_free(p);
  }            
}

/*
** Implementation of the geopoly_ccw(X) function.
**
** If the rotation of polygon X is clockwise (incorrect) instead of
** counter-clockwise (the correct winding order according to RFC7946)
** then reverse the order of the vertexes in polygon X.  
**
** In other words, this routine returns a CCW polygon regardless of the
** winding order of its input.
**
** Use this routine to sanitize historical inputs that that sometimes
** contain polygons that wind in the wrong direction.
*/
static void geopolyCcwFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  GeoPoly *p = geopolyFuncParam(context, argv[0], 0);
  if( p ){
    if( geopolyArea(p)<0.0 ){
      int ii, jj;




      for(ii=2, jj=p->nVertex*2 - 4; ii<jj; ii+=2, jj-=2){
        GeoCoord t = p->a[ii];
        p->a[ii] = p->a[jj];
        p->a[jj] = t;
        t = p->a[ii+1];
        p->a[ii+1] = p->a[jj+1];
        p->a[jj+1] = t;
      }



    }
    sqlite3_result_blob(context, p->hdr, 
       4+8*p->nVertex, SQLITE_TRANSIENT);
    sqlite3_free(p);
  }            
}

#define GEOPOLY_PI 3.1415926535897932385

/* Fast approximation for cosine(X) for X between -0.5*pi and 2*pi
*/
static double geopolyCosine(double r){
  assert( r>=-0.5*GEOPOLY_PI && r<=2.0*GEOPOLY_PI );
  if( r>=1.5*GEOPOLY_PI ){
    r -= 2.0*GEOPOLY_PI;
  }
  if( r>=0.5*GEOPOLY_PI ){
    return -geopolyCosine(r-GEOPOLY_PI);
  }else{
    double r2 = r*r;
    double r3 = r2*r;
    double r5 = r3*r2;
    return 0.9996949*r - 0.1656700*r3 + 0.0075134*r5;
  }
}

/*
** Function:   geopoly_regular(X,Y,R,N)
**
** Construct a simple, convex, regular polygon centered at X, Y
** with circumradius R and with N sides.
*/
static void geopolyRegularFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  double x = sqlite3_value_double(argv[0]);
  double y = sqlite3_value_double(argv[1]);
  double r = sqlite3_value_double(argv[2]);
  int n = sqlite3_value_int(argv[3]);
  int i;
  GeoPoly *p;

  if( n<3 || r<=0.0 ) return;
  if( n>1000 ) n = 1000;
  p = sqlite3_malloc64( sizeof(*p) + (n-1)*2*sizeof(GeoCoord) );
  if( p==0 ){
    sqlite3_result_error_nomem(context);
    return;
  }
  i = 1;
  p->hdr[0] = *(unsigned char*)&i;
  p->hdr[1] = 0;
  p->hdr[2] = (n>>8)&0xff;
  p->hdr[3] = n&0xff;
  for(i=0; i<n; i++){
    double rAngle = 2.0*GEOPOLY_PI*i/n;
    p->a[i*2] = x - r*geopolyCosine(rAngle-0.5*GEOPOLY_PI);
    p->a[i*2+1] = y + r*geopolyCosine(rAngle);
  }
  sqlite3_result_blob(context, p->hdr, 4+8*n, SQLITE_TRANSIENT);
  sqlite3_free(p);
}

/*
** If pPoly is a polygon, compute its bounding box. Then:
**
**    (1) if aCoord!=0 store the bounding box in aCoord, returning NULL
**    (2) otherwise, compute a GeoPoly for the bounding box and return the
**        new GeoPoly
................................................................................
      r = p->a[ii*2+1];
      if( r<mnY ) mnY = (float)r;
      else if( r>mxY ) mxY = (float)r;
    }
    if( pRc ) *pRc = SQLITE_OK;
    if( aCoord==0 ){
      geopolyBboxFill:
      pOut = sqlite3_realloc(p, GEOPOLY_SZ(4));
      if( pOut==0 ){
        sqlite3_free(p);
        if( context ) sqlite3_result_error_nomem(context);
        if( pRc ) *pRc = SQLITE_NOMEM;
        return 0;
      }
      pOut->nVertex = 4;
................................................................................
    int jj;
    int nChange = 0;
    sqlite3_bind_int64(pUp, 1, cell.iRowid);
    assert( pRtree->nAux>=1 );
    if( sqlite3_value_nochange(aData[2]) ){
      sqlite3_bind_null(pUp, 2);
    }else{
      GeoPoly *p = 0;
      if( sqlite3_value_type(aData[2])==SQLITE_TEXT
       && (p = geopolyFuncParam(0, aData[2], &rc))!=0
       && rc==SQLITE_OK
      ){
        sqlite3_bind_blob(pUp, 2, p->hdr, 4+8*p->nVertex, SQLITE_TRANSIENT);
      }else{
        sqlite3_bind_value(pUp, 2, aData[2]);
      }
      sqlite3_free(p);
      nChange = 1;
    }
    for(jj=1; jj<pRtree->nAux; jj++){
      nChange++;
      sqlite3_bind_value(pUp, jj+2, aData[jj+2]);
    }
    if( nChange ){
................................................................................
  0,                          /* xRollbackTo */
};

static int sqlite3_geopoly_init(sqlite3 *db){
  int rc = SQLITE_OK;
  static const struct {
    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
    signed char nArg;
    unsigned char bPure;
    const char *zName;
  } aFunc[] = {
     { geopolyAreaFunc,          1, 1,    "geopoly_area"             },
     { geopolyBlobFunc,          1, 1,    "geopoly_blob"             },
     { geopolyJsonFunc,          1, 1,    "geopoly_json"             },
     { geopolySvgFunc,          -1, 1,    "geopoly_svg"              },
     { geopolyWithinFunc,        2, 1,    "geopoly_within"           },
     { geopolyContainsPointFunc, 3, 1,    "geopoly_contains_point"   },
     { geopolyOverlapFunc,       2, 1,    "geopoly_overlap"          },
     { geopolyDebugFunc,         1, 0,    "geopoly_debug"            },
     { geopolyBBoxFunc,          1, 1,    "geopoly_bbox"             },
     { geopolyXformFunc,         7, 1,    "geopoly_xform"            },
     { geopolyRegularFunc,       4, 1,    "geopoly_regular"          },
     { geopolyCcwFunc,           1, 1,    "geopoly_ccw"              },
  };
  static const struct {
    void (*xStep)(sqlite3_context*,int,sqlite3_value**);
    void (*xFinal)(sqlite3_context*);
    const char *zName;
  } aAgg[] = {
     { geopolyBBoxStep, geopolyBBoxFinal, "geopoly_group_bbox"    },
  };
  int i;
  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
    int enc = aFunc[i].bPure ? SQLITE_UTF8|SQLITE_DETERMINISTIC : SQLITE_UTF8;
    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
                                 enc, 0,
                                 aFunc[i].xFunc, 0, 0);
  }
  for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_function(db, aAgg[i].zName, 1, SQLITE_UTF8, 0,
                                 0, aAgg[i].xStep, aAgg[i].xFinal);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_module_v2(db, "geopoly", &geopolyModule, 0, 0);
  }
  return rc;
}

       )
  FROM geo1
 WHERE geopoly_overlap(_shape,(SELECT poly FROM querypoly));
SELECT geopoly_svg(poly,'style="fill:none;stroke:black;stroke-width:2"')
  FROM querypoly;
ROLLBACK;
.print '</svg>'














.print '</html>'

       )
  FROM geo1
 WHERE geopoly_overlap(_shape,(SELECT poly FROM querypoly));
SELECT geopoly_svg(poly,'style="fill:none;stroke:black;stroke-width:2"')
  FROM querypoly;
ROLLBACK;
.print '</svg>'

.print '<h1>Regular Polygons</h1>'
.print '<svg width="1000" height="200" style="border:1px solid black">'
SELECT geopoly_svg(geopoly_regular(100,100,40,3),'style="fill:none;stroke:red;stroke-width:1"');
SELECT geopoly_svg(geopoly_regular(200,100,40,4),'style="fill:none;stroke:orange;stroke-width:1"');
SELECT geopoly_svg(geopoly_regular(300,100,40,5),'style="fill:none;stroke:green;stroke-width:1"');
SELECT geopoly_svg(geopoly_regular(400,100,40,6),'style="fill:none;stroke:blue;stroke-width:1"');
SELECT geopoly_svg(geopoly_regular(500,100,40,7),'style="fill:none;stroke:purple;stroke-width:1"');
SELECT geopoly_svg(geopoly_regular(600,100,40,8),'style="fill:none;stroke:red;stroke-width:1"');
SELECT geopoly_svg(geopoly_regular(700,100,40,10),'style="fill:none;stroke:orange;stroke-width:1"');
SELECT geopoly_svg(geopoly_regular(800,100,40,20),'style="fill:none;stroke:green;stroke-width:1"');
SELECT geopoly_svg(geopoly_regular(900,100,40,30),'style="fill:none;stroke:blue;stroke-width:1"');
.print '</svg>'

.print '</html>'

    sessionAppendTableHdr(&buf, pGrp->bPatch, pTab, &rc);
    for(i=0; i<pTab->nChange; i++){
      SessionChange *p;
      for(p=pTab->apChange[i]; p; p=p->pNext){
        sessionAppendByte(&buf, p->op, &rc);
        sessionAppendByte(&buf, p->bIndirect, &rc);
        sessionAppendBlob(&buf, p->aRecord, p->nRecord, &rc);
      }
    }

    if( rc==SQLITE_OK && xOutput && buf.nBuf>=SESSIONS_STRM_CHUNK_SIZE ){
      rc = xOutput(pOut, buf.aBuf, buf.nBuf);
      buf.nBuf = 0;
    }


  }

  if( rc==SQLITE_OK ){
    if( xOutput ){
      if( buf.nBuf>0 ) rc = xOutput(pOut, buf.aBuf, buf.nBuf);
    }else{
      *ppOut = buf.aBuf;

    sessionAppendTableHdr(&buf, pGrp->bPatch, pTab, &rc);
    for(i=0; i<pTab->nChange; i++){
      SessionChange *p;
      for(p=pTab->apChange[i]; p; p=p->pNext){
        sessionAppendByte(&buf, p->op, &rc);
        sessionAppendByte(&buf, p->bIndirect, &rc);
        sessionAppendBlob(&buf, p->aRecord, p->nRecord, &rc);



        if( rc==SQLITE_OK && xOutput && buf.nBuf>=SESSIONS_STRM_CHUNK_SIZE ){
          rc = xOutput(pOut, buf.aBuf, buf.nBuf);
          buf.nBuf = 0;
        }
      }
    }
  }

  if( rc==SQLITE_OK ){
    if( xOutput ){
      if( buf.nBuf>0 ) rc = xOutput(pOut, buf.aBuf, buf.nBuf);
    }else{
      *ppOut = buf.aBuf;

  if( db->auth.zAuthUser==0 ) return SQLITE_NOMEM;
  db->auth.zAuthPW = sqlite3_malloc( nPW+1 );
  if( db->auth.zAuthPW==0 ) return SQLITE_NOMEM;
  memcpy(db->auth.zAuthPW,zPW,nPW);
  db->auth.nAuthPW = nPW;
  rc = sqlite3UserAuthCheckLogin(db, "main", &authLevel);
  db->auth.authLevel = authLevel;
  sqlite3ExpirePreparedStatements(db);
  if( rc ){
    return rc;           /* OOM error, I/O error, etc. */
  }
  if( authLevel<UAUTH_User ){
    return SQLITE_AUTH;  /* Incorrect username and/or password */
  }
  return SQLITE_OK;      /* Successful login */

  if( db->auth.zAuthUser==0 ) return SQLITE_NOMEM;
  db->auth.zAuthPW = sqlite3_malloc( nPW+1 );
  if( db->auth.zAuthPW==0 ) return SQLITE_NOMEM;
  memcpy(db->auth.zAuthPW,zPW,nPW);
  db->auth.nAuthPW = nPW;
  rc = sqlite3UserAuthCheckLogin(db, "main", &authLevel);
  db->auth.authLevel = authLevel;
  sqlite3ExpirePreparedStatements(db, 0);
  if( rc ){
    return rc;           /* OOM error, I/O error, etc. */
  }
  if( authLevel<UAUTH_User ){
    return SQLITE_AUTH;  /* Incorrect username and/or password */
  }
  return SQLITE_OK;      /* Successful login */

#
TESTSRC += \
  $(TOP)/ext/misc/amatch.c \
  $(TOP)/ext/misc/carray.c \
  $(TOP)/ext/misc/closure.c \
  $(TOP)/ext/misc/csv.c \
  $(TOP)/ext/misc/eval.c \

  $(TOP)/ext/misc/fileio.c \
  $(TOP)/ext/misc/fuzzer.c \
  $(TOP)/ext/misc/ieee754.c \
  $(TOP)/ext/misc/mmapwarm.c \
  $(TOP)/ext/misc/nextchar.c \
  $(TOP)/ext/misc/normalize.c \
  $(TOP)/ext/misc/percentile.c \

#
TESTSRC += \
  $(TOP)/ext/misc/amatch.c \
  $(TOP)/ext/misc/carray.c \
  $(TOP)/ext/misc/closure.c \
  $(TOP)/ext/misc/csv.c \
  $(TOP)/ext/misc/eval.c \
  $(TOP)/ext/misc/explain.c \
  $(TOP)/ext/misc/fileio.c \
  $(TOP)/ext/misc/fuzzer.c \
  $(TOP)/ext/misc/ieee754.c \
  $(TOP)/ext/misc/mmapwarm.c \
  $(TOP)/ext/misc/nextchar.c \
  $(TOP)/ext/misc/normalize.c \
  $(TOP)/ext/misc/percentile.c \

  ** table.
  */
  v = sqlite3GetVdbe(pParse);
  if( v==0 ){
    goto exit_rename_table;
  }

  /* If this is a virtual table, invoke the xRename() function if
  ** one is defined. The xRename() callback will modify the names
  ** of any resources used by the v-table implementation (including other
  ** SQLite tables) that are identified by the name of the virtual table.
  */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( pVTab ){
    int i = ++pParse->nMem;
    sqlite3VdbeLoadString(v, i, zName);
    sqlite3VdbeAddOp4(v, OP_VRename, i, 0, 0,(const char*)pVTab, P4_VTAB);
    sqlite3MayAbort(pParse);
  }
#endif

  /* figure out how many UTF-8 characters are in zName */
  zTabName = pTab->zName;
  nTabName = sqlite3Utf8CharLen(zTabName, -1);

  /* Rewrite all CREATE TABLE, INDEX, TRIGGER or VIEW statements in
  ** the schema to use the new table name.  */
  sqlite3NestedParse(pParse, 
................................................................................
            "tbl_name = "
              "CASE WHEN tbl_name=%Q COLLATE nocase AND "
              "          sqlite_rename_test(%Q, sql, type, name, 1) "
              "THEN %Q ELSE tbl_name END "
            "WHERE type IN ('view', 'trigger')"
        , zDb, zTabName, zName, zTabName, zDb, zName);
  }















  renameReloadSchema(pParse, iDb);
  renameTestSchema(pParse, zDb, iDb==1);

exit_rename_table:
  sqlite3SrcListDelete(db, pSrc);
  sqlite3DbFree(db, zName);
................................................................................
  if( pExpr->op==TK_TRIGGER 
   && pExpr->iColumn==p->iCol 
   && pWalker->pParse->pTriggerTab==p->pTab
  ){
    renameTokenFind(pWalker->pParse, p, (void*)pExpr);
  }else if( pExpr->op==TK_COLUMN 
   && pExpr->iColumn==p->iCol 
   && p->pTab==pExpr->pTab
  ){
    renameTokenFind(pWalker->pParse, p, (void*)pExpr);
  }
  return WRC_Continue;
}

/*
................................................................................
  memset(&sNC, 0, sizeof(sNC));
  sNC.pParse = pParse;
  assert( pNew->pTabSchema );
  pParse->pTriggerTab = sqlite3FindTable(db, pNew->table, 
      db->aDb[sqlite3SchemaToIndex(db, pNew->pTabSchema)].zDbSName
  );
  pParse->eTriggerOp = pNew->op;






  /* Resolve symbols in WHEN clause */
  if( pNew->pWhen ){
    rc = sqlite3ResolveExprNames(&sNC, pNew->pWhen);
  }

  for(pStep=pNew->step_list; rc==SQLITE_OK && pStep; pStep=pStep->pNext){
    if( pStep->pSelect ){
      sqlite3SelectPrep(pParse, pStep->pSelect, &sNC);
      if( pParse->nErr ) rc = pParse->rc;
    }
    if( rc==SQLITE_OK && pStep->zTarget ){
      Table *pTarget = sqlite3LocateTable(pParse, 0, pStep->zTarget, zDb);
      if( pTarget==0 ){
        rc = SQLITE_ERROR;
      }else{
        SrcList sSrc;
        memset(&sSrc, 0, sizeof(sSrc));
        sSrc.nSrc = 1;
        sSrc.a[0].zName = pStep->zTarget;
        sSrc.a[0].pTab = pTarget;
        sNC.pSrcList = &sSrc;
        if( pStep->pWhere ){
................................................................................
}

/*
** Walker expression callback used by "RENAME TABLE". 
*/
static int renameTableExprCb(Walker *pWalker, Expr *pExpr){
  RenameCtx *p = pWalker->u.pRename;
  if( pExpr->op==TK_COLUMN && p->pTab==pExpr->pTab ){
    renameTokenFind(pWalker->pParse, p, (void*)&pExpr->pTab);
  }
  return WRC_Continue;
}

/*
** Walker select callback used by "RENAME TABLE". 
*/
................................................................................
    sWalker.xExprCallback = renameTableExprCb;
    sWalker.xSelectCallback = renameTableSelectCb;
    sWalker.u.pRename = &sCtx;

    rc = renameParseSql(&sParse, zDb, 1, db, zInput, bTemp);

    if( rc==SQLITE_OK ){

      if( sParse.pNewTable ){
        Table *pTab = sParse.pNewTable;

        if( pTab->pSelect ){

          NameContext sNC;
          memset(&sNC, 0, sizeof(sNC));
          sNC.pParse = &sParse;

          sqlite3SelectPrep(&sParse, pTab->pSelect, &sNC);
          if( sParse.nErr ) rc = sParse.rc;
          sqlite3WalkSelect(&sWalker, pTab->pSelect);

        }else{
          /* Modify any FK definitions to point to the new table. */
#ifndef SQLITE_OMIT_FOREIGN_KEY
          if( db->flags & SQLITE_ForeignKeys ){
            FKey *pFKey;
            for(pFKey=pTab->pFKey; pFKey; pFKey=pFKey->pNextFrom){
              if( sqlite3_stricmp(pFKey->zTo, zOld)==0 ){
................................................................................
#endif

          /* If this is the table being altered, fix any table refs in CHECK
          ** expressions. Also update the name that appears right after the
          ** "CREATE [VIRTUAL] TABLE" bit. */
          if( sqlite3_stricmp(zOld, pTab->zName)==0 ){
            sCtx.pTab = pTab;

            sqlite3WalkExprList(&sWalker, pTab->pCheck);

            renameTokenFind(&sParse, &sCtx, pTab->zName);
          }
        }
      }

      else if( sParse.pNewIndex ){
        renameTokenFind(&sParse, &sCtx, sParse.pNewIndex->zName);

        sqlite3WalkExpr(&sWalker, sParse.pNewIndex->pPartIdxWhere);

      }

#ifndef SQLITE_OMIT_TRIGGER
      else{
        Trigger *pTrigger = sParse.pNewTrigger;
        TriggerStep *pStep;
        if( 0==sqlite3_stricmp(sParse.pNewTrigger->table, zOld) 
            && sCtx.pTab->pSchema==pTrigger->pTabSchema
          ){
          renameTokenFind(&sParse, &sCtx, sParse.pNewTrigger->table);
        }


        rc = renameResolveTrigger(&sParse, bTemp ? 0 : zDb);
        if( rc==SQLITE_OK ){
          renameWalkTrigger(&sWalker, pTrigger);
          for(pStep=pTrigger->step_list; pStep; pStep=pStep->pNext){
            if( pStep->zTarget && 0==sqlite3_stricmp(pStep->zTarget, zOld) ){
              renameTokenFind(&sParse, &sCtx, pStep->zTarget);

            }
          }
        }
      }
#endif
    }

................................................................................
  int NotUsed,
  sqlite3_value **argv
){
  sqlite3 *db = sqlite3_context_db_handle(context);
  char const *zDb = (const char*)sqlite3_value_text(argv[0]);
  char const *zInput = (const char*)sqlite3_value_text(argv[1]);
  int bTemp = sqlite3_value_int(argv[4]);


#ifndef SQLITE_OMIT_AUTHORIZATION
  sqlite3_xauth xAuth = db->xAuth;
  db->xAuth = 0;
#endif

  UNUSED_PARAMETER(NotUsed);
  if( zDb && zInput ){
    int rc;
    Parse sParse;
    rc = renameParseSql(&sParse, zDb, 1, db, zInput, bTemp);
    if( rc==SQLITE_OK ){
      if( sParse.pNewTable && sParse.pNewTable->pSelect ){
        NameContext sNC;
        memset(&sNC, 0, sizeof(sNC));
        sNC.pParse = &sParse;
        sqlite3SelectPrep(&sParse, sParse.pNewTable->pSelect, &sNC);
        if( sParse.nErr ) rc = sParse.rc;
      }

      else if( sParse.pNewTrigger ){

        rc = renameResolveTrigger(&sParse, bTemp ? 0 : zDb);

        if( rc==SQLITE_OK ){
          int i1 = sqlite3SchemaToIndex(db, sParse.pNewTrigger->pTabSchema);
          int i2 = sqlite3FindDbName(db, zDb);
          if( i1==i2 ) sqlite3_result_int(context, 1);
        }
      }
    }

  ** table.
  */
  v = sqlite3GetVdbe(pParse);
  if( v==0 ){
    goto exit_rename_table;
  }















  /* figure out how many UTF-8 characters are in zName */
  zTabName = pTab->zName;
  nTabName = sqlite3Utf8CharLen(zTabName, -1);

  /* Rewrite all CREATE TABLE, INDEX, TRIGGER or VIEW statements in
  ** the schema to use the new table name.  */
  sqlite3NestedParse(pParse, 
................................................................................
            "tbl_name = "
              "CASE WHEN tbl_name=%Q COLLATE nocase AND "
              "          sqlite_rename_test(%Q, sql, type, name, 1) "
              "THEN %Q ELSE tbl_name END "
            "WHERE type IN ('view', 'trigger')"
        , zDb, zTabName, zName, zTabName, zDb, zName);
  }

  /* If this is a virtual table, invoke the xRename() function if
  ** one is defined. The xRename() callback will modify the names
  ** of any resources used by the v-table implementation (including other
  ** SQLite tables) that are identified by the name of the virtual table.
  */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( pVTab ){
    int i = ++pParse->nMem;
    sqlite3VdbeLoadString(v, i, zName);
    sqlite3VdbeAddOp4(v, OP_VRename, i, 0, 0,(const char*)pVTab, P4_VTAB);
    sqlite3MayAbort(pParse);
  }
#endif

  renameReloadSchema(pParse, iDb);
  renameTestSchema(pParse, zDb, iDb==1);

exit_rename_table:
  sqlite3SrcListDelete(db, pSrc);
  sqlite3DbFree(db, zName);
................................................................................
  if( pExpr->op==TK_TRIGGER 
   && pExpr->iColumn==p->iCol 
   && pWalker->pParse->pTriggerTab==p->pTab
  ){
    renameTokenFind(pWalker->pParse, p, (void*)pExpr);
  }else if( pExpr->op==TK_COLUMN 
   && pExpr->iColumn==p->iCol 
   && p->pTab==pExpr->y.pTab
  ){
    renameTokenFind(pWalker->pParse, p, (void*)pExpr);
  }
  return WRC_Continue;
}

/*
................................................................................
  memset(&sNC, 0, sizeof(sNC));
  sNC.pParse = pParse;
  assert( pNew->pTabSchema );
  pParse->pTriggerTab = sqlite3FindTable(db, pNew->table, 
      db->aDb[sqlite3SchemaToIndex(db, pNew->pTabSchema)].zDbSName
  );
  pParse->eTriggerOp = pNew->op;
  /* ALWAYS() because if the table of the trigger does not exist, the
  ** error would have been hit before this point */
  if( ALWAYS(pParse->pTriggerTab) ){
    rc = sqlite3ViewGetColumnNames(pParse, pParse->pTriggerTab);
  }

  /* Resolve symbols in WHEN clause */
  if( rc==SQLITE_OK && pNew->pWhen ){
    rc = sqlite3ResolveExprNames(&sNC, pNew->pWhen);
  }

  for(pStep=pNew->step_list; rc==SQLITE_OK && pStep; pStep=pStep->pNext){
    if( pStep->pSelect ){
      sqlite3SelectPrep(pParse, pStep->pSelect, &sNC);
      if( pParse->nErr ) rc = pParse->rc;
    }
    if( rc==SQLITE_OK && pStep->zTarget ){
      Table *pTarget = sqlite3LocateTable(pParse, 0, pStep->zTarget, zDb);
      if( pTarget==0 ){
        rc = SQLITE_ERROR;
      }else if( SQLITE_OK==(rc = sqlite3ViewGetColumnNames(pParse, pTarget)) ){
        SrcList sSrc;
        memset(&sSrc, 0, sizeof(sSrc));
        sSrc.nSrc = 1;
        sSrc.a[0].zName = pStep->zTarget;
        sSrc.a[0].pTab = pTarget;
        sNC.pSrcList = &sSrc;
        if( pStep->pWhere ){
................................................................................
}

/*
** Walker expression callback used by "RENAME TABLE". 
*/
static int renameTableExprCb(Walker *pWalker, Expr *pExpr){
  RenameCtx *p = pWalker->u.pRename;
  if( pExpr->op==TK_COLUMN && p->pTab==pExpr->y.pTab ){
    renameTokenFind(pWalker->pParse, p, (void*)&pExpr->y.pTab);
  }
  return WRC_Continue;
}

/*
** Walker select callback used by "RENAME TABLE". 
*/
................................................................................
    sWalker.xExprCallback = renameTableExprCb;
    sWalker.xSelectCallback = renameTableSelectCb;
    sWalker.u.pRename = &sCtx;

    rc = renameParseSql(&sParse, zDb, 1, db, zInput, bTemp);

    if( rc==SQLITE_OK ){
      int isLegacy = (db->flags & SQLITE_LegacyAlter);
      if( sParse.pNewTable ){
        Table *pTab = sParse.pNewTable;

        if( pTab->pSelect ){
          if( isLegacy==0 ){
            NameContext sNC;
            memset(&sNC, 0, sizeof(sNC));
            sNC.pParse = &sParse;

            sqlite3SelectPrep(&sParse, pTab->pSelect, &sNC);
            if( sParse.nErr ) rc = sParse.rc;
            sqlite3WalkSelect(&sWalker, pTab->pSelect);
          }
        }else{
          /* Modify any FK definitions to point to the new table. */
#ifndef SQLITE_OMIT_FOREIGN_KEY
          if( db->flags & SQLITE_ForeignKeys ){
            FKey *pFKey;
            for(pFKey=pTab->pFKey; pFKey; pFKey=pFKey->pNextFrom){
              if( sqlite3_stricmp(pFKey->zTo, zOld)==0 ){
................................................................................
#endif

          /* If this is the table being altered, fix any table refs in CHECK
          ** expressions. Also update the name that appears right after the
          ** "CREATE [VIRTUAL] TABLE" bit. */
          if( sqlite3_stricmp(zOld, pTab->zName)==0 ){
            sCtx.pTab = pTab;
            if( isLegacy==0 ){
              sqlite3WalkExprList(&sWalker, pTab->pCheck);
            }
            renameTokenFind(&sParse, &sCtx, pTab->zName);
          }
        }
      }

      else if( sParse.pNewIndex ){
        renameTokenFind(&sParse, &sCtx, sParse.pNewIndex->zName);
        if( isLegacy==0 ){
          sqlite3WalkExpr(&sWalker, sParse.pNewIndex->pPartIdxWhere);
        }
      }

#ifndef SQLITE_OMIT_TRIGGER
      else{
        Trigger *pTrigger = sParse.pNewTrigger;
        TriggerStep *pStep;
        if( 0==sqlite3_stricmp(sParse.pNewTrigger->table, zOld) 
            && sCtx.pTab->pSchema==pTrigger->pTabSchema
          ){
          renameTokenFind(&sParse, &sCtx, sParse.pNewTrigger->table);
        }

        if( isLegacy==0 ){
          rc = renameResolveTrigger(&sParse, bTemp ? 0 : zDb);
          if( rc==SQLITE_OK ){
            renameWalkTrigger(&sWalker, pTrigger);
            for(pStep=pTrigger->step_list; pStep; pStep=pStep->pNext){
              if( pStep->zTarget && 0==sqlite3_stricmp(pStep->zTarget, zOld) ){
                renameTokenFind(&sParse, &sCtx, pStep->zTarget);
              }
            }
          }
        }
      }
#endif
    }

................................................................................
  int NotUsed,
  sqlite3_value **argv
){
  sqlite3 *db = sqlite3_context_db_handle(context);
  char const *zDb = (const char*)sqlite3_value_text(argv[0]);
  char const *zInput = (const char*)sqlite3_value_text(argv[1]);
  int bTemp = sqlite3_value_int(argv[4]);
  int isLegacy = (db->flags & SQLITE_LegacyAlter);

#ifndef SQLITE_OMIT_AUTHORIZATION
  sqlite3_xauth xAuth = db->xAuth;
  db->xAuth = 0;
#endif

  UNUSED_PARAMETER(NotUsed);
  if( zDb && zInput ){
    int rc;
    Parse sParse;
    rc = renameParseSql(&sParse, zDb, 1, db, zInput, bTemp);
    if( rc==SQLITE_OK ){
      if( isLegacy==0 && sParse.pNewTable && sParse.pNewTable->pSelect ){
        NameContext sNC;
        memset(&sNC, 0, sizeof(sNC));
        sNC.pParse = &sParse;
        sqlite3SelectPrep(&sParse, sParse.pNewTable->pSelect, &sNC);
        if( sParse.nErr ) rc = sParse.rc;
      }

      else if( sParse.pNewTrigger ){
        if( isLegacy==0 ){
          rc = renameResolveTrigger(&sParse, bTemp ? 0 : zDb);
        }
        if( rc==SQLITE_OK ){
          int i1 = sqlite3SchemaToIndex(db, sParse.pNewTrigger->pTabSchema);
          int i2 = sqlite3FindDbName(db, zDb);
          if( i1==i2 ) sqlite3_result_int(context, 1);
        }
      }
    }

  Table *pTab = 0;      /* The table being read */
  const char *zCol;     /* Name of the column of the table */
  int iSrc;             /* Index in pTabList->a[] of table being read */
  int iDb;              /* The index of the database the expression refers to */
  int iCol;             /* Index of column in table */

  assert( pExpr->op==TK_COLUMN || pExpr->op==TK_TRIGGER );

  if( db->xAuth==0 ) return;
  iDb = sqlite3SchemaToIndex(pParse->db, pSchema);
  if( iDb<0 ){
    /* An attempt to read a column out of a subquery or other
    ** temporary table. */
    return;
  }
................................................................................
){
  sqlite3 *db = pParse->db;
  int rc;

  /* Don't do any authorization checks if the database is initialising
  ** or if the parser is being invoked from within sqlite3_declare_vtab.
  */

  if( db->init.busy || IN_SPECIAL_PARSE ){
    return SQLITE_OK;
  }

  if( db->xAuth==0 ){
    return SQLITE_OK;
  }

  Table *pTab = 0;      /* The table being read */
  const char *zCol;     /* Name of the column of the table */
  int iSrc;             /* Index in pTabList->a[] of table being read */
  int iDb;              /* The index of the database the expression refers to */
  int iCol;             /* Index of column in table */

  assert( pExpr->op==TK_COLUMN || pExpr->op==TK_TRIGGER );
  assert( !IN_RENAME_OBJECT || db->xAuth==0 );
  if( db->xAuth==0 ) return;
  iDb = sqlite3SchemaToIndex(pParse->db, pSchema);
  if( iDb<0 ){
    /* An attempt to read a column out of a subquery or other
    ** temporary table. */
    return;
  }
................................................................................
){
  sqlite3 *db = pParse->db;
  int rc;

  /* Don't do any authorization checks if the database is initialising
  ** or if the parser is being invoked from within sqlite3_declare_vtab.
  */
  assert( !IN_RENAME_OBJECT || db->xAuth==0 );
  if( db->init.busy || IN_SPECIAL_PARSE ){
    return SQLITE_OK;
  }

  if( db->xAuth==0 ){
    return SQLITE_OK;
  }

    for(i=0; i<pTab->nCol; i++){
      if( (pTab->aCol[i].colFlags & COLFLAG_PRIMKEY)!=0 ){
        pTab->aCol[i].notNull = OE_Abort;
      }
    }
  }

  /* The remaining transformations only apply to b-tree tables, not to
  ** virtual tables */
  if( IN_DECLARE_VTAB ) return;

  /* Convert the P3 operand of the OP_CreateBtree opcode from BTREE_INTKEY
  ** into BTREE_BLOBKEY.
  */
  if( pParse->addrCrTab ){
    assert( v );
    sqlite3VdbeChangeP3(v, pParse->addrCrTab, BTREE_BLOBKEY);
  }
................................................................................
  ** to the elements of the FROM clause.  But we do not want these changes
  ** to be permanent.  So the computation is done on a copy of the SELECT
  ** statement that defines the view.
  */
  assert( pTable->pSelect );
  pSel = sqlite3SelectDup(db, pTable->pSelect, 0);
  if( pSel ){




    n = pParse->nTab;
    sqlite3SrcListAssignCursors(pParse, pSel->pSrc);
    pTable->nCol = -1;
    db->lookaside.bDisable++;
#ifndef SQLITE_OMIT_AUTHORIZATION
    xAuth = db->xAuth;
    db->xAuth = 0;
................................................................................
    }else{
      pTable->nCol = 0;
      nErr++;
    }
    sqlite3DeleteTable(db, pSelTab);
    sqlite3SelectDelete(db, pSel);
    db->lookaside.bDisable--;



  } else {
    nErr++;
  }
  pTable->pSchema->schemaFlags |= DB_UnresetViews;
  if( db->mallocFailed ){
    sqlite3DeleteColumnNames(db, pTable);
    pTable->aCol = 0;

    for(i=0; i<pTab->nCol; i++){
      if( (pTab->aCol[i].colFlags & COLFLAG_PRIMKEY)!=0 ){
        pTab->aCol[i].notNull = OE_Abort;
      }
    }
  }





  /* Convert the P3 operand of the OP_CreateBtree opcode from BTREE_INTKEY
  ** into BTREE_BLOBKEY.
  */
  if( pParse->addrCrTab ){
    assert( v );
    sqlite3VdbeChangeP3(v, pParse->addrCrTab, BTREE_BLOBKEY);
  }
................................................................................
  ** to the elements of the FROM clause.  But we do not want these changes
  ** to be permanent.  So the computation is done on a copy of the SELECT
  ** statement that defines the view.
  */
  assert( pTable->pSelect );
  pSel = sqlite3SelectDup(db, pTable->pSelect, 0);
  if( pSel ){
#ifndef SQLITE_OMIT_ALTERTABLE
    u8 eParseMode = pParse->eParseMode;
    pParse->eParseMode = PARSE_MODE_NORMAL;
#endif
    n = pParse->nTab;
    sqlite3SrcListAssignCursors(pParse, pSel->pSrc);
    pTable->nCol = -1;
    db->lookaside.bDisable++;
#ifndef SQLITE_OMIT_AUTHORIZATION
    xAuth = db->xAuth;
    db->xAuth = 0;
................................................................................
    }else{
      pTable->nCol = 0;
      nErr++;
    }
    sqlite3DeleteTable(db, pSelTab);
    sqlite3SelectDelete(db, pSel);
    db->lookaside.bDisable--;
#ifndef SQLITE_OMIT_ALTERTABLE
    pParse->eParseMode = eParseMode;
#endif
  } else {
    nErr++;
  }
  pTable->pSchema->schemaFlags |= DB_UnresetViews;
  if( db->mallocFailed ){
    sqlite3DeleteColumnNames(db, pTable);
    pTable->aCol = 0;

  if( op==TK_REGISTER ) op = pExpr->op2;
#ifndef SQLITE_OMIT_CAST
  if( op==TK_CAST ){
    assert( !ExprHasProperty(pExpr, EP_IntValue) );
    return sqlite3AffinityType(pExpr->u.zToken, 0);
  }
#endif
  if( (op==TK_AGG_COLUMN || op==TK_COLUMN) && pExpr->pTab ){
    return sqlite3TableColumnAffinity(pExpr->pTab, pExpr->iColumn);
  }
  if( op==TK_SELECT_COLUMN ){
    assert( pExpr->pLeft->flags&EP_xIsSelect );
    return sqlite3ExprAffinity(
        pExpr->pLeft->x.pSelect->pEList->a[pExpr->iColumn].pExpr
    );
  }
................................................................................
  CollSeq *pColl = 0;
  Expr *p = pExpr;
  while( p ){
    int op = p->op;
    if( p->flags & EP_Generic ) break;
    if( (op==TK_AGG_COLUMN || op==TK_COLUMN
          || op==TK_REGISTER || op==TK_TRIGGER)
     && p->pTab!=0
    ){
      /* op==TK_REGISTER && p->pTab!=0 happens when pExpr was originally
      ** a TK_COLUMN but was previously evaluated and cached in a register */
      int j = p->iColumn;
      if( j>=0 ){
        const char *zColl = p->pTab->aCol[j].zColl;
        pColl = sqlite3FindCollSeq(db, ENC(db), zColl, 0);
      }
      break;
    }
    if( op==TK_CAST || op==TK_UPLUS ){
      p = p->pLeft;
      continue;
................................................................................
/*
** Recursively delete an expression tree.
*/
static SQLITE_NOINLINE void sqlite3ExprDeleteNN(sqlite3 *db, Expr *p){
  assert( p!=0 );
  /* Sanity check: Assert that the IntValue is non-negative if it exists */
  assert( !ExprHasProperty(p, EP_IntValue) || p->u.iValue>=0 );




#ifdef SQLITE_DEBUG
  if( ExprHasProperty(p, EP_Leaf) && !ExprHasProperty(p, EP_TokenOnly) ){
    assert( p->pLeft==0 );
    assert( p->pRight==0 );
    assert( p->x.pSelect==0 );
  }
#endif
................................................................................
    if( p->pRight ){
      sqlite3ExprDeleteNN(db, p->pRight);
    }else if( ExprHasProperty(p, EP_xIsSelect) ){
      sqlite3SelectDelete(db, p->x.pSelect);
    }else{
      sqlite3ExprListDelete(db, p->x.pList);
    }
    if( !ExprHasProperty(p, EP_Reduced) ){

      sqlite3WindowDelete(db, p->pWin);
    }
  }
  if( ExprHasProperty(p, EP_MemToken) ) sqlite3DbFree(db, p->u.zToken);
  if( !ExprHasProperty(p, EP_Static) ){
    sqlite3DbFreeNN(db, p);
  }
}
................................................................................
static int dupedExprStructSize(Expr *p, int flags){
  int nSize;
  assert( flags==EXPRDUP_REDUCE || flags==0 ); /* Only one flag value allowed */
  assert( EXPR_FULLSIZE<=0xfff );
  assert( (0xfff & (EP_Reduced|EP_TokenOnly))==0 );
  if( 0==flags || p->op==TK_SELECT_COLUMN 
#ifndef SQLITE_OMIT_WINDOWFUNC
   || p->pWin 
#endif
  ){
    nSize = EXPR_FULLSIZE;
  }else{
    assert( !ExprHasProperty(p, EP_TokenOnly|EP_Reduced) );
    assert( !ExprHasProperty(p, EP_FromJoin) ); 
    assert( !ExprHasProperty(p, EP_MemToken) );
................................................................................
        pNew->x.pSelect = sqlite3SelectDup(db, p->x.pSelect, dupFlags);
      }else{
        pNew->x.pList = sqlite3ExprListDup(db, p->x.pList, dupFlags);
      }
    }

    /* Fill in pNew->pLeft and pNew->pRight. */
    if( ExprHasProperty(pNew, EP_Reduced|EP_TokenOnly) ){
      zAlloc += dupedExprNodeSize(p, dupFlags);
      if( !ExprHasProperty(pNew, EP_TokenOnly|EP_Leaf) ){
        pNew->pLeft = p->pLeft ?
                      exprDup(db, p->pLeft, EXPRDUP_REDUCE, &zAlloc) : 0;
        pNew->pRight = p->pRight ?
                       exprDup(db, p->pRight, EXPRDUP_REDUCE, &zAlloc) : 0;
      }






      if( pzBuffer ){
        *pzBuffer = zAlloc;
      }
    }else{
#ifndef SQLITE_OMIT_WINDOWFUNC
      if( ExprHasProperty(p, EP_Reduced|EP_TokenOnly) ){
        pNew->pWin = 0;
      }else{
        pNew->pWin = sqlite3WindowDup(db, pNew, p->pWin);
      }
#endif /* SQLITE_OMIT_WINDOWFUNC */
      if( !ExprHasProperty(p, EP_TokenOnly|EP_Leaf) ){
        if( pNew->op==TK_SELECT_COLUMN ){
          pNew->pLeft = p->pLeft;
          assert( p->iColumn==0 || p->pRight==0 );
          assert( p->pRight==0  || p->pRight==p->pLeft );
        }else{
          pNew->pLeft = sqlite3ExprDup(db, p->pLeft, 0);
................................................................................
    case TK_INTEGER:
    case TK_STRING:
    case TK_FLOAT:
    case TK_BLOB:
      return 0;
    case TK_COLUMN:
      return ExprHasProperty(p, EP_CanBeNull) ||
             p->pTab==0 ||  /* Reference to column of index on expression */
             (p->iColumn>=0 && p->pTab->aCol[p->iColumn].notNull==0);
    default:
      return 1;
  }
}

/*
** Return TRUE if the given expression is a constant which would be
................................................................................
        /* This COLUMN expression is really a constant due to WHERE clause
        ** constraints, and that constant is coded by the pExpr->pLeft
        ** expresssion.  However, make sure the constant has the correct
        ** datatype by applying the Affinity of the table column to the
        ** constant.
        */
        int iReg = sqlite3ExprCodeTarget(pParse, pExpr->pLeft,target);
        int aff = sqlite3TableColumnAffinity(pExpr->pTab, pExpr->iColumn);
        if( aff!=SQLITE_AFF_BLOB ){
          static const char zAff[] = "B\000C\000D\000E";
          assert( SQLITE_AFF_BLOB=='A' );
          assert( SQLITE_AFF_TEXT=='B' );
          if( iReg!=target ){
            sqlite3VdbeAddOp2(v, OP_SCopy, iReg, target);
            iReg = target;
................................................................................
          return pExpr->iColumn - pParse->iSelfTab;
        }else{
          /* Coding an expression that is part of an index where column names
          ** in the index refer to the table to which the index belongs */
          iTab = pParse->iSelfTab - 1;
        }
      }
      return sqlite3ExprCodeGetColumn(pParse, pExpr->pTab,
                               pExpr->iColumn, iTab, target,
                               pExpr->op2);
    }
    case TK_INTEGER: {
      codeInteger(pParse, pExpr, 0, target);
      return target;
    }
................................................................................
      u32 constMask = 0;     /* Mask of function arguments that are constant */
      int i;                 /* Loop counter */
      sqlite3 *db = pParse->db;  /* The database connection */
      u8 enc = ENC(db);      /* The text encoding used by this database */
      CollSeq *pColl = 0;    /* A collating sequence */

#ifndef SQLITE_OMIT_WINDOWFUNC
      if( !ExprHasProperty(pExpr, EP_TokenOnly|EP_Reduced) && pExpr->pWin ){
        return pExpr->pWin->regResult;
      }
#endif

      if( ConstFactorOk(pParse) && sqlite3ExprIsConstantNotJoin(pExpr) ){
        /* SQL functions can be expensive. So try to move constant functions
        ** out of the inner loop, even if that means an extra OP_Copy. */
        return sqlite3ExprCodeAtInit(pParse, pExpr, -1);
................................................................................
      **
      ** Then p1 is interpreted as follows:
      **
      **   p1==0   ->    old.rowid     p1==3   ->    new.rowid
      **   p1==1   ->    old.a         p1==4   ->    new.a
      **   p1==2   ->    old.b         p1==5   ->    new.b       
      */
      Table *pTab = pExpr->pTab;
      int p1 = pExpr->iTable * (pTab->nCol+1) + 1 + pExpr->iColumn;

      assert( pExpr->iTable==0 || pExpr->iTable==1 );
      assert( pExpr->iColumn>=-1 && pExpr->iColumn<pTab->nCol );
      assert( pTab->iPKey<0 || pExpr->iColumn!=pTab->iPKey );
      assert( p1>=0 && p1<(pTab->nCol*2+2) );

      sqlite3VdbeAddOp2(v, OP_Param, p1, target);
      VdbeComment((v, "r[%d]=%s.%s", target,
        (pExpr->iTable ? "new" : "old"),
        (pExpr->iColumn<0 ? "rowid" : pExpr->pTab->aCol[pExpr->iColumn].zName)
      ));

#ifndef SQLITE_OMIT_FLOATING_POINT
      /* If the column has REAL affinity, it may currently be stored as an
      ** integer. Use OP_RealAffinity to make sure it is really real.
      **
      ** EVIDENCE-OF: R-60985-57662 SQLite will convert the value back to
................................................................................
      return 1;
    }
    return 2;
  }
  if( pA->op!=TK_COLUMN && pA->op!=TK_AGG_COLUMN && pA->u.zToken ){
    if( pA->op==TK_FUNCTION ){
      if( sqlite3StrICmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;














    }else if( pA->op==TK_COLLATE ){
      if( sqlite3_stricmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;
    }else if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
      return 2;
    }
  }
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
................................................................................
    if( sqlite3ExprListCompare(pA->x.pList, pB->x.pList, iTab) ) return 2;
    assert( (combinedFlags & EP_Reduced)==0 );
    if( pA->op!=TK_STRING && pA->op!=TK_TRUEFALSE ){
      if( pA->iColumn!=pB->iColumn ) return 2;
      if( pA->iTable!=pB->iTable 
       && (pA->iTable!=iTab || NEVER(pB->iTable>=0)) ) return 2;
    }
#ifndef SQLITE_OMIT_WINDOWFUNC
    /* Justification for the assert():
    ** window functions have p->op==TK_FUNCTION but aggregate functions
    ** have p->op==TK_AGG_FUNCTION.  So any comparison between an aggregate
    ** function and a window function should have failed before reaching
    ** this point.  And, it is not possible to have a window function and
    ** a scalar function with the same name and number of arguments.  So
    ** if we reach this point, either A and B both window functions or
    ** neither are a window functions. */
    assert( (pA->pWin==0)==(pB->pWin==0) );

    if( pA->pWin!=0 ){
      if( sqlite3WindowCompare(pParse,pA->pWin,pB->pWin)!=0 ) return 2;
    }
#endif
  }
  return 0;
}

/*
** Compare two ExprList objects.  Return 0 if they are identical and 
** non-zero if they differ in any way.
................................................................................
  }
  return 0;
}

/*
** This is the Expr node callback for sqlite3ExprImpliesNotNullRow().
** If the expression node requires that the table at pWalker->iCur
** have a non-NULL column, then set pWalker->eCode to 1 and abort.
*/
static int impliesNotNullRow(Walker *pWalker, Expr *pExpr){
  /* This routine is only called for WHERE clause expressions and so it
  ** cannot have any TK_AGG_COLUMN entries because those are only found
  ** in HAVING clauses.  We can get a TK_AGG_FUNCTION in a WHERE clause,
  ** but that is an illegal construct and the query will be rejected at
  ** a later stage of processing, so the TK_AGG_FUNCTION case does not
  ** need to be considered here. */
  assert( pExpr->op!=TK_AGG_COLUMN );
  testcase( pExpr->op==TK_AGG_FUNCTION );

  if( ExprHasProperty(pExpr, EP_FromJoin) ) return WRC_Prune;
  switch( pExpr->op ){
    case TK_ISNOT:
    case TK_NOT:
    case TK_ISNULL:
    case TK_IS:
    case TK_OR:
................................................................................
    case TK_GE:
      testcase( pExpr->op==TK_EQ );
      testcase( pExpr->op==TK_NE );
      testcase( pExpr->op==TK_LT );
      testcase( pExpr->op==TK_LE );
      testcase( pExpr->op==TK_GT );
      testcase( pExpr->op==TK_GE );
      if( (pExpr->pLeft->op==TK_COLUMN && IsVirtual(pExpr->pLeft->pTab))
       || (pExpr->pRight->op==TK_COLUMN && IsVirtual(pExpr->pRight->pTab))
      ){
       return WRC_Prune;
      }
    default:
      return WRC_Continue;
  }
}
................................................................................
                break;
              }
            }
            if( (k>=pAggInfo->nColumn)
             && (k = addAggInfoColumn(pParse->db, pAggInfo))>=0 
            ){
              pCol = &pAggInfo->aCol[k];
              pCol->pTab = pExpr->pTab;
              pCol->iTable = pExpr->iTable;
              pCol->iColumn = pExpr->iColumn;
              pCol->iMem = ++pParse->nMem;
              pCol->iSorterColumn = -1;
              pCol->pExpr = pExpr;
              if( pAggInfo->pGroupBy ){
                int j, n;

  if( op==TK_REGISTER ) op = pExpr->op2;
#ifndef SQLITE_OMIT_CAST
  if( op==TK_CAST ){
    assert( !ExprHasProperty(pExpr, EP_IntValue) );
    return sqlite3AffinityType(pExpr->u.zToken, 0);
  }
#endif
  if( (op==TK_AGG_COLUMN || op==TK_COLUMN) && pExpr->y.pTab ){
    return sqlite3TableColumnAffinity(pExpr->y.pTab, pExpr->iColumn);
  }
  if( op==TK_SELECT_COLUMN ){
    assert( pExpr->pLeft->flags&EP_xIsSelect );
    return sqlite3ExprAffinity(
        pExpr->pLeft->x.pSelect->pEList->a[pExpr->iColumn].pExpr
    );
  }
................................................................................
  CollSeq *pColl = 0;
  Expr *p = pExpr;
  while( p ){
    int op = p->op;
    if( p->flags & EP_Generic ) break;
    if( (op==TK_AGG_COLUMN || op==TK_COLUMN
          || op==TK_REGISTER || op==TK_TRIGGER)
     && p->y.pTab!=0
    ){
      /* op==TK_REGISTER && p->y.pTab!=0 happens when pExpr was originally
      ** a TK_COLUMN but was previously evaluated and cached in a register */
      int j = p->iColumn;
      if( j>=0 ){
        const char *zColl = p->y.pTab->aCol[j].zColl;
        pColl = sqlite3FindCollSeq(db, ENC(db), zColl, 0);
      }
      break;
    }
    if( op==TK_CAST || op==TK_UPLUS ){
      p = p->pLeft;
      continue;
................................................................................
/*
** Recursively delete an expression tree.
*/
static SQLITE_NOINLINE void sqlite3ExprDeleteNN(sqlite3 *db, Expr *p){
  assert( p!=0 );
  /* Sanity check: Assert that the IntValue is non-negative if it exists */
  assert( !ExprHasProperty(p, EP_IntValue) || p->u.iValue>=0 );

  assert( !ExprHasProperty(p, EP_WinFunc) || p->y.pWin!=0 || db->mallocFailed );
  assert( p->op!=TK_FUNCTION || ExprHasProperty(p, EP_TokenOnly|EP_Reduced)
          || p->y.pWin==0 || ExprHasProperty(p, EP_WinFunc) );
#ifdef SQLITE_DEBUG
  if( ExprHasProperty(p, EP_Leaf) && !ExprHasProperty(p, EP_TokenOnly) ){
    assert( p->pLeft==0 );
    assert( p->pRight==0 );
    assert( p->x.pSelect==0 );
  }
#endif
................................................................................
    if( p->pRight ){
      sqlite3ExprDeleteNN(db, p->pRight);
    }else if( ExprHasProperty(p, EP_xIsSelect) ){
      sqlite3SelectDelete(db, p->x.pSelect);
    }else{
      sqlite3ExprListDelete(db, p->x.pList);
    }
    if( ExprHasProperty(p, EP_WinFunc) ){
      assert( p->op==TK_FUNCTION );
      sqlite3WindowDelete(db, p->y.pWin);
    }
  }
  if( ExprHasProperty(p, EP_MemToken) ) sqlite3DbFree(db, p->u.zToken);
  if( !ExprHasProperty(p, EP_Static) ){
    sqlite3DbFreeNN(db, p);
  }
}
................................................................................
static int dupedExprStructSize(Expr *p, int flags){
  int nSize;
  assert( flags==EXPRDUP_REDUCE || flags==0 ); /* Only one flag value allowed */
  assert( EXPR_FULLSIZE<=0xfff );
  assert( (0xfff & (EP_Reduced|EP_TokenOnly))==0 );
  if( 0==flags || p->op==TK_SELECT_COLUMN 
#ifndef SQLITE_OMIT_WINDOWFUNC
   || ExprHasProperty(p, EP_WinFunc)
#endif
  ){
    nSize = EXPR_FULLSIZE;
  }else{
    assert( !ExprHasProperty(p, EP_TokenOnly|EP_Reduced) );
    assert( !ExprHasProperty(p, EP_FromJoin) ); 
    assert( !ExprHasProperty(p, EP_MemToken) );
................................................................................
        pNew->x.pSelect = sqlite3SelectDup(db, p->x.pSelect, dupFlags);
      }else{
        pNew->x.pList = sqlite3ExprListDup(db, p->x.pList, dupFlags);
      }
    }

    /* Fill in pNew->pLeft and pNew->pRight. */
    if( ExprHasProperty(pNew, EP_Reduced|EP_TokenOnly|EP_WinFunc) ){
      zAlloc += dupedExprNodeSize(p, dupFlags);
      if( !ExprHasProperty(pNew, EP_TokenOnly|EP_Leaf) ){
        pNew->pLeft = p->pLeft ?
                      exprDup(db, p->pLeft, EXPRDUP_REDUCE, &zAlloc) : 0;
        pNew->pRight = p->pRight ?
                       exprDup(db, p->pRight, EXPRDUP_REDUCE, &zAlloc) : 0;
      }
#ifndef SQLITE_OMIT_WINDOWFUNC
      if( ExprHasProperty(p, EP_WinFunc) ){
        pNew->y.pWin = sqlite3WindowDup(db, pNew, p->y.pWin);
        assert( ExprHasProperty(pNew, EP_WinFunc) );
      }
#endif /* SQLITE_OMIT_WINDOWFUNC */
      if( pzBuffer ){
        *pzBuffer = zAlloc;
      }
    }else{







      if( !ExprHasProperty(p, EP_TokenOnly|EP_Leaf) ){
        if( pNew->op==TK_SELECT_COLUMN ){
          pNew->pLeft = p->pLeft;
          assert( p->iColumn==0 || p->pRight==0 );
          assert( p->pRight==0  || p->pRight==p->pLeft );
        }else{
          pNew->pLeft = sqlite3ExprDup(db, p->pLeft, 0);
................................................................................
    case TK_INTEGER:
    case TK_STRING:
    case TK_FLOAT:
    case TK_BLOB:
      return 0;
    case TK_COLUMN:
      return ExprHasProperty(p, EP_CanBeNull) ||
             p->y.pTab==0 ||  /* Reference to column of index on expression */
             (p->iColumn>=0 && p->y.pTab->aCol[p->iColumn].notNull==0);
    default:
      return 1;
  }
}

/*
** Return TRUE if the given expression is a constant which would be
................................................................................
        /* This COLUMN expression is really a constant due to WHERE clause
        ** constraints, and that constant is coded by the pExpr->pLeft
        ** expresssion.  However, make sure the constant has the correct
        ** datatype by applying the Affinity of the table column to the
        ** constant.
        */
        int iReg = sqlite3ExprCodeTarget(pParse, pExpr->pLeft,target);
        int aff = sqlite3TableColumnAffinity(pExpr->y.pTab, pExpr->iColumn);
        if( aff!=SQLITE_AFF_BLOB ){
          static const char zAff[] = "B\000C\000D\000E";
          assert( SQLITE_AFF_BLOB=='A' );
          assert( SQLITE_AFF_TEXT=='B' );
          if( iReg!=target ){
            sqlite3VdbeAddOp2(v, OP_SCopy, iReg, target);
            iReg = target;
................................................................................
          return pExpr->iColumn - pParse->iSelfTab;
        }else{
          /* Coding an expression that is part of an index where column names
          ** in the index refer to the table to which the index belongs */
          iTab = pParse->iSelfTab - 1;
        }
      }
      return sqlite3ExprCodeGetColumn(pParse, pExpr->y.pTab,
                               pExpr->iColumn, iTab, target,
                               pExpr->op2);
    }
    case TK_INTEGER: {
      codeInteger(pParse, pExpr, 0, target);
      return target;
    }
................................................................................
      u32 constMask = 0;     /* Mask of function arguments that are constant */
      int i;                 /* Loop counter */
      sqlite3 *db = pParse->db;  /* The database connection */
      u8 enc = ENC(db);      /* The text encoding used by this database */
      CollSeq *pColl = 0;    /* A collating sequence */

#ifndef SQLITE_OMIT_WINDOWFUNC
      if( ExprHasProperty(pExpr, EP_WinFunc) ){
        return pExpr->y.pWin->regResult;
      }
#endif

      if( ConstFactorOk(pParse) && sqlite3ExprIsConstantNotJoin(pExpr) ){
        /* SQL functions can be expensive. So try to move constant functions
        ** out of the inner loop, even if that means an extra OP_Copy. */
        return sqlite3ExprCodeAtInit(pParse, pExpr, -1);
................................................................................
      **
      ** Then p1 is interpreted as follows:
      **
      **   p1==0   ->    old.rowid     p1==3   ->    new.rowid
      **   p1==1   ->    old.a         p1==4   ->    new.a
      **   p1==2   ->    old.b         p1==5   ->    new.b       
      */
      Table *pTab = pExpr->y.pTab;
      int p1 = pExpr->iTable * (pTab->nCol+1) + 1 + pExpr->iColumn;

      assert( pExpr->iTable==0 || pExpr->iTable==1 );
      assert( pExpr->iColumn>=-1 && pExpr->iColumn<pTab->nCol );
      assert( pTab->iPKey<0 || pExpr->iColumn!=pTab->iPKey );
      assert( p1>=0 && p1<(pTab->nCol*2+2) );

      sqlite3VdbeAddOp2(v, OP_Param, p1, target);
      VdbeComment((v, "r[%d]=%s.%s", target,
        (pExpr->iTable ? "new" : "old"),
        (pExpr->iColumn<0 ? "rowid" : pExpr->y.pTab->aCol[pExpr->iColumn].zName)
      ));

#ifndef SQLITE_OMIT_FLOATING_POINT
      /* If the column has REAL affinity, it may currently be stored as an
      ** integer. Use OP_RealAffinity to make sure it is really real.
      **
      ** EVIDENCE-OF: R-60985-57662 SQLite will convert the value back to
................................................................................
      return 1;
    }
    return 2;
  }
  if( pA->op!=TK_COLUMN && pA->op!=TK_AGG_COLUMN && pA->u.zToken ){
    if( pA->op==TK_FUNCTION ){
      if( sqlite3StrICmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;
#ifndef SQLITE_OMIT_WINDOWFUNC
      /* Justification for the assert():
      ** window functions have p->op==TK_FUNCTION but aggregate functions
      ** have p->op==TK_AGG_FUNCTION.  So any comparison between an aggregate
      ** function and a window function should have failed before reaching
      ** this point.  And, it is not possible to have a window function and
      ** a scalar function with the same name and number of arguments.  So
      ** if we reach this point, either A and B both window functions or
      ** neither are a window functions. */
      assert( ExprHasProperty(pA,EP_WinFunc)==ExprHasProperty(pB,EP_WinFunc) );
      if( ExprHasProperty(pA,EP_WinFunc) ){
        if( sqlite3WindowCompare(pParse,pA->y.pWin,pB->y.pWin)!=0 ) return 2;
      }
#endif
    }else if( pA->op==TK_COLLATE ){
      if( sqlite3_stricmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;
    }else if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
      return 2;
    }
  }
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
................................................................................
    if( sqlite3ExprListCompare(pA->x.pList, pB->x.pList, iTab) ) return 2;
    assert( (combinedFlags & EP_Reduced)==0 );
    if( pA->op!=TK_STRING && pA->op!=TK_TRUEFALSE ){
      if( pA->iColumn!=pB->iColumn ) return 2;
      if( pA->iTable!=pB->iTable 
       && (pA->iTable!=iTab || NEVER(pB->iTable>=0)) ) return 2;
    }















  }
  return 0;
}

/*
** Compare two ExprList objects.  Return 0 if they are identical and 
** non-zero if they differ in any way.
................................................................................
  }
  return 0;
}

/*
** This is the Expr node callback for sqlite3ExprImpliesNotNullRow().
** If the expression node requires that the table at pWalker->iCur
** have one or more non-NULL column, then set pWalker->eCode to 1 and abort.
**
** This routine controls an optimization.  False positives (setting
** pWalker->eCode to 1 when it should not be) are deadly, but false-negatives
** (never setting pWalker->eCode) is a harmless missed optimization.
*/
static int impliesNotNullRow(Walker *pWalker, Expr *pExpr){
  testcase( pExpr->op==TK_AGG_COLUMN );
  testcase( pExpr->op==TK_AGG_FUNCTION );



  if( ExprHasProperty(pExpr, EP_FromJoin) ) return WRC_Prune;
  switch( pExpr->op ){
    case TK_ISNOT:
    case TK_NOT:
    case TK_ISNULL:
    case TK_IS:
    case TK_OR:
................................................................................
    case TK_GE:
      testcase( pExpr->op==TK_EQ );
      testcase( pExpr->op==TK_NE );
      testcase( pExpr->op==TK_LT );
      testcase( pExpr->op==TK_LE );
      testcase( pExpr->op==TK_GT );
      testcase( pExpr->op==TK_GE );
      if( (pExpr->pLeft->op==TK_COLUMN && IsVirtual(pExpr->pLeft->y.pTab))
       || (pExpr->pRight->op==TK_COLUMN && IsVirtual(pExpr->pRight->y.pTab))
      ){
       return WRC_Prune;
      }
    default:
      return WRC_Continue;
  }
}
................................................................................
                break;
              }
            }
            if( (k>=pAggInfo->nColumn)
             && (k = addAggInfoColumn(pParse->db, pAggInfo))>=0 
            ){
              pCol = &pAggInfo->aCol[k];
              pCol->pTab = pExpr->y.pTab;
              pCol->iTable = pExpr->iTable;
              pCol->iColumn = pExpr->iColumn;
              pCol->iMem = ++pParse->nMem;
              pCol->iSorterColumn = -1;
              pCol->pExpr = pExpr;
              if( pAggInfo->pGroupBy ){
                int j, n;

  sqlite3 *db,      /* The database connection */
  Table *pTab,      /* The table whose column is desired */
  int iCursor,      /* The open cursor on the table */
  i16 iCol          /* The column that is wanted */
){
  Expr *pExpr = sqlite3Expr(db, TK_COLUMN, 0);
  if( pExpr ){
    pExpr->pTab = pTab;
    pExpr->iTable = iCursor;
    pExpr->iColumn = iCol;
  }
  return pExpr;
}

/*

  sqlite3 *db,      /* The database connection */
  Table *pTab,      /* The table whose column is desired */
  int iCursor,      /* The open cursor on the table */
  i16 iCol          /* The column that is wanted */
){
  Expr *pExpr = sqlite3Expr(db, TK_COLUMN, 0);
  if( pExpr ){
    pExpr->y.pTab = pTab;
    pExpr->iTable = iCursor;
    pExpr->iColumn = iCol;
  }
  return pExpr;
}

/*

 #undef pTrigger
#endif
#ifdef tmask
 #undef tmask
#endif

/*
** Meanings of bits in of pWalker->eCode for checkConstraintUnchanged()

*/
#define CKCNSTRNT_COLUMN   0x01    /* CHECK constraint uses a changing column */
#define CKCNSTRNT_ROWID    0x02    /* CHECK constraint references the ROWID */

/* This is the Walker callback from checkConstraintUnchanged().  Set
** bit 0x01 of pWalker->eCode if
** pWalker->eCode to 0 if this expression node references any of the
** columns that are being modifed by an UPDATE statement.
*/
static int checkConstraintExprNode(Walker *pWalker, Expr *pExpr){
  if( pExpr->op==TK_COLUMN ){
    assert( pExpr->iColumn>=0 || pExpr->iColumn==-1 );
    if( pExpr->iColumn>=0 ){
      if( pWalker->u.aiCol[pExpr->iColumn]>=0 ){
................................................................................
}

/*
** pExpr is a CHECK constraint on a row that is being UPDATE-ed.  The
** only columns that are modified by the UPDATE are those for which
** aiChng[i]>=0, and also the ROWID is modified if chngRowid is true.
**
** Return true if CHECK constraint pExpr does not use any of the
** changing columns (or the rowid if it is changing).  In other words,
** return true if this CHECK constraint can be skipped when validating
** the new row in the UPDATE statement.





*/
static int checkConstraintUnchanged(Expr *pExpr, int *aiChng, int chngRowid){





  Walker w;
  memset(&w, 0, sizeof(w));
  w.eCode = 0;
  w.xExprCallback = checkConstraintExprNode;
  w.u.aiCol = aiChng;
  sqlite3WalkExpr(&w, pExpr);
  if( !chngRowid ){
................................................................................
    testcase( (w.eCode & CKCNSTRNT_ROWID)!=0 );
    w.eCode &= ~CKCNSTRNT_ROWID;
  }
  testcase( w.eCode==0 );
  testcase( w.eCode==CKCNSTRNT_COLUMN );
  testcase( w.eCode==CKCNSTRNT_ROWID );
  testcase( w.eCode==(CKCNSTRNT_ROWID|CKCNSTRNT_COLUMN) );
  return !w.eCode;
}

/*
** Generate code to do constraint checks prior to an INSERT or an UPDATE
** on table pTab.
**
** The regNewData parameter is the first register in a range that contains
................................................................................
  if( pTab->pCheck && (db->flags & SQLITE_IgnoreChecks)==0 ){
    ExprList *pCheck = pTab->pCheck;
    pParse->iSelfTab = -(regNewData+1);
    onError = overrideError!=OE_Default ? overrideError : OE_Abort;
    for(i=0; i<pCheck->nExpr; i++){
      int allOk;
      Expr *pExpr = pCheck->a[i].pExpr;
      if( aiChng && checkConstraintUnchanged(pExpr, aiChng, pkChng) ) continue;






      allOk = sqlite3VdbeMakeLabel(v);
      sqlite3VdbeVerifyAbortable(v, onError);
      sqlite3ExprIfTrue(pParse, pExpr, allOk, SQLITE_JUMPIFNULL);
      if( onError==OE_Ignore ){
        sqlite3VdbeGoto(v, ignoreDest);
      }else{
        char *zName = pCheck->a[i].zName;

 #undef pTrigger
#endif
#ifdef tmask
 #undef tmask
#endif

/*
** Meanings of bits in of pWalker->eCode for 
** sqlite3ExprReferencesUpdatedColumn()
*/
#define CKCNSTRNT_COLUMN   0x01    /* CHECK constraint uses a changing column */
#define CKCNSTRNT_ROWID    0x02    /* CHECK constraint references the ROWID */

/* This is the Walker callback from sqlite3ExprReferencesUpdatedColumn().
*  Set bit 0x01 of pWalker->eCode if pWalker->eCode to 0 and if this
** expression node references any of the
** columns that are being modifed by an UPDATE statement.
*/
static int checkConstraintExprNode(Walker *pWalker, Expr *pExpr){
  if( pExpr->op==TK_COLUMN ){
    assert( pExpr->iColumn>=0 || pExpr->iColumn==-1 );
    if( pExpr->iColumn>=0 ){
      if( pWalker->u.aiCol[pExpr->iColumn]>=0 ){
................................................................................
}

/*
** pExpr is a CHECK constraint on a row that is being UPDATE-ed.  The
** only columns that are modified by the UPDATE are those for which
** aiChng[i]>=0, and also the ROWID is modified if chngRowid is true.
**
** Return true if CHECK constraint pExpr uses any of the
** changing columns (or the rowid if it is changing).  In other words,
** return true if this CHECK constraint must be validated for
** the new row in the UPDATE statement.
**
** 2018-09-15: pExpr might also be an expression for an index-on-expressions.
** The operation of this routine is the same - return true if an only if
** the expression uses one or more of columns identified by the second and
** third arguments.
*/

int sqlite3ExprReferencesUpdatedColumn(
  Expr *pExpr,    /* The expression to be checked */
  int *aiChng,    /* aiChng[x]>=0 if column x changed by the UPDATE */
  int chngRowid   /* True if UPDATE changes the rowid */
){
  Walker w;
  memset(&w, 0, sizeof(w));
  w.eCode = 0;
  w.xExprCallback = checkConstraintExprNode;
  w.u.aiCol = aiChng;
  sqlite3WalkExpr(&w, pExpr);
  if( !chngRowid ){
................................................................................
    testcase( (w.eCode & CKCNSTRNT_ROWID)!=0 );
    w.eCode &= ~CKCNSTRNT_ROWID;
  }
  testcase( w.eCode==0 );
  testcase( w.eCode==CKCNSTRNT_COLUMN );
  testcase( w.eCode==CKCNSTRNT_ROWID );
  testcase( w.eCode==(CKCNSTRNT_ROWID|CKCNSTRNT_COLUMN) );
  return w.eCode!=0;
}

/*
** Generate code to do constraint checks prior to an INSERT or an UPDATE
** on table pTab.
**
** The regNewData parameter is the first register in a range that contains
................................................................................
  if( pTab->pCheck && (db->flags & SQLITE_IgnoreChecks)==0 ){
    ExprList *pCheck = pTab->pCheck;
    pParse->iSelfTab = -(regNewData+1);
    onError = overrideError!=OE_Default ? overrideError : OE_Abort;
    for(i=0; i<pCheck->nExpr; i++){
      int allOk;
      Expr *pExpr = pCheck->a[i].pExpr;
      if( aiChng
       && !sqlite3ExprReferencesUpdatedColumn(pExpr, aiChng, pkChng)
      ){
        /* The check constraints do not reference any of the columns being
        ** updated so there is no point it verifying the check constraint */
        continue;
      }
      allOk = sqlite3VdbeMakeLabel(v);
      sqlite3VdbeVerifyAbortable(v, onError);
      sqlite3ExprIfTrue(pParse, pExpr, allOk, SQLITE_JUMPIFNULL);
      if( onError==OE_Ignore ){
        sqlite3VdbeGoto(v, ignoreDest);
      }else{
        char *zName = pCheck->a[i].zName;

    }
  }
  sqlite3_mutex_enter(db->mutex);
  db->errMask = 0xff;
  db->nDb = 2;
  db->magic = SQLITE_MAGIC_BUSY;
  db->aDb = db->aDbStatic;


  assert( sizeof(db->aLimit)==sizeof(aHardLimit) );
  memcpy(db->aLimit, aHardLimit, sizeof(db->aLimit));
  db->aLimit[SQLITE_LIMIT_WORKER_THREADS] = SQLITE_DEFAULT_WORKER_THREADS;
  db->autoCommit = 1;
  db->nextAutovac = -1;
  db->szMmap = sqlite3GlobalConfig.szMmap;

    }
  }
  sqlite3_mutex_enter(db->mutex);
  db->errMask = 0xff;
  db->nDb = 2;
  db->magic = SQLITE_MAGIC_BUSY;
  db->aDb = db->aDbStatic;
  db->lookaside.bDisable = 1;

  assert( sizeof(db->aLimit)==sizeof(aHardLimit) );
  memcpy(db->aLimit, aHardLimit, sizeof(db->aLimit));
  db->aLimit[SQLITE_LIMIT_WORKER_THREADS] = SQLITE_DEFAULT_WORKER_THREADS;
  db->autoCommit = 1;
  db->nextAutovac = -1;
  db->szMmap = sqlite3GlobalConfig.szMmap;

/*
** Allowed values of unixFile.fsFlags
*/
#define SQLITE_FSFLAGS_IS_MSDOS     0x1

/*
** If we are to be thread-safe, include the pthreads header and define
** the SQLITE_UNIX_THREADS macro.
*/
#if SQLITE_THREADSAFE
# include <pthread.h>
# define SQLITE_UNIX_THREADS 1
#endif

/*
** Default permissions when creating a new file
*/
#ifndef SQLITE_DEFAULT_FILE_PERMISSIONS
# define SQLITE_DEFAULT_FILE_PERMISSIONS 0644
................................................................................
  { "lstat",         (sqlite3_syscall_ptr)lstat,          0 },
#else
  { "lstat",         (sqlite3_syscall_ptr)0,              0 },
#endif
#define osLstat      ((int(*)(const char*,struct stat*))aSyscall[27].pCurrent)

#if defined(__linux__) && defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)



  { "ioctl",         (sqlite3_syscall_ptr)ioctl,          0 },

#else
  { "ioctl",         (sqlite3_syscall_ptr)0,              0 },
#endif
#define osIoctl ((int(*)(int,int,...))aSyscall[28].pCurrent)

}; /* End of the overrideable system calls */

................................................................................
  /* WAS:  ino_t ino;   */
  u64 ino;                   /* Inode number */
#endif
};

/*
** An instance of the following structure is allocated for each open
** inode.  Or, on LinuxThreads, there is one of these structures for
** each inode opened by each thread.
**
** A single inode can have multiple file descriptors, so each unixFile
** structure contains a pointer to an instance of this object and this
** object keeps a count of the number of unixFile pointing to it.
**
** Mutex rules:
**
................................................................................
  sem_t *pSem;                    /* Named POSIX semaphore */
  char aSemName[MAX_PATHNAME+2];  /* Name of that semaphore */
#endif
};

/*
** A lists of all unixInodeInfo objects.


*/
static unixInodeInfo *inodeList = 0;  /* All unixInodeInfo objects */

#ifdef SQLITE_DEBUG
/*
** True if the inode mutex is held, or not.  Used only within assert()
** to help verify correct mutex usage.

*/
int unixFileMutexHeld(unixFile *pFile){
  assert( pFile->pInode );
  return sqlite3_mutex_held(pFile->pInode->pLockMutex);
}
int unixFileMutexNotheld(unixFile *pFile){
  assert( pFile->pInode );
................................................................................
  }
  pInode->pUnused = 0;
}

/*
** Release a unixInodeInfo structure previously allocated by findInodeInfo().
**
** The mutex entered using the unixEnterMutex() function must be held
** when this function is called.
*/
static void releaseInodeInfo(unixFile *pFile){
  unixInodeInfo *pInode = pFile->pInode;
  assert( unixMutexHeld() );
  assert( unixFileMutexNotheld(pFile) );
  if( ALWAYS(pInode) ){
    pInode->nRef--;
................................................................................
}

/*
** Given a file descriptor, locate the unixInodeInfo object that
** describes that file descriptor.  Create a new one if necessary.  The
** return value might be uninitialized if an error occurs.
**
** The mutex entered using the unixEnterMutex() function must be held
** when this function is called.
**
** Return an appropriate error code.
*/
static int findInodeInfo(
  unixFile *pFile,               /* Unix file with file desc used in the key */
  unixInodeInfo **ppInode        /* Return the unixInodeInfo object here */
){
................................................................................
  memset(&fileId, 0, sizeof(fileId));
  fileId.dev = statbuf.st_dev;
#if OS_VXWORKS
  fileId.pId = pFile->pId;
#else
  fileId.ino = (u64)statbuf.st_ino;
#endif

  pInode = inodeList;
  while( pInode && memcmp(&fileId, &pInode->fileId, sizeof(fileId)) ){
    pInode = pInode->pNext;
  }
  if( pInode==0 ){
    pInode = sqlite3_malloc64( sizeof(*pInode) );
    if( pInode==0 ){
................................................................................
      pInode->pLockMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
      if( pInode->pLockMutex==0 ){
        sqlite3_free(pInode);
        return SQLITE_NOMEM_BKPT;
      }
    }
    pInode->nRef = 1;

    pInode->pNext = inodeList;
    pInode->pPrev = 0;
    if( inodeList ) inodeList->pPrev = pInode;
    inodeList = pInode;
  }else{
    pInode->nRef++;
  }
................................................................................
** unixMutexHeld() must be true when creating or destroying
** this object or while reading or writing the following fields:
**
**      nRef
**
** The following fields are read-only after the object is created:
** 
**      fid
**      zFilename
**
** Either unixShmNode.mutex must be held or unixShmNode.nRef==0 and
** unixMutexHeld() is true when reading or writing any other field
** in this structure.
*/
struct unixShmNode {
  unixInodeInfo *pInode;     /* unixInodeInfo that owns this SHM node */
  sqlite3_mutex *mutex;      /* Mutex to access this object */
  char *zFilename;           /* Name of the mmapped file */
  int h;                     /* Open file descriptor */
  int szRegion;              /* Size of shared-memory regions */
  u16 nRegion;               /* Size of array apRegion */
  u8 isReadonly;             /* True if read-only */
  u8 isUnlocked;             /* True if no DMS lock held */
  char **apRegion;           /* Array of mapped shared-memory regions */
  int nRef;                  /* Number of unixShm objects pointing to this */
  unixShm *pFirst;           /* All unixShm objects pointing to this */
................................................................................
/*
** Structure used internally by this VFS to record the state of an
** open shared memory connection.
**
** The following fields are initialized when this object is created and
** are read-only thereafter:
**
**    unixShm.pFile
**    unixShm.id
**
** All other fields are read/write.  The unixShm.pFile->mutex must be held
** while accessing any read/write fields.
*/
struct unixShm {
  unixShmNode *pShmNode;     /* The underlying unixShmNode object */
  unixShm *pNext;            /* Next unixShm with the same unixShmNode */
  u8 hasMutex;               /* True if holding the unixShmNode mutex */
  u8 id;                     /* Id of this connection within its unixShmNode */
  u16 sharedMask;            /* Mask of shared locks held */
  u16 exclMask;              /* Mask of exclusive locks held */
};

/*
** Constants used for locking
................................................................................
){
  unixShmNode *pShmNode; /* Apply locks to this open shared-memory segment */
  struct flock f;        /* The posix advisory locking structure */
  int rc = SQLITE_OK;    /* Result code form fcntl() */

  /* Access to the unixShmNode object is serialized by the caller */
  pShmNode = pFile->pInode->pShmNode;
  assert( pShmNode->nRef==0 || sqlite3_mutex_held(pShmNode->mutex) );


  /* Shared locks never span more than one byte */
  assert( n==1 || lockType!=F_RDLCK );

  /* Locks are within range */
  assert( n>=1 && n<=SQLITE_SHM_NLOCK );

  if( pShmNode->h>=0 ){
    /* Initialize the locking parameters */
    f.l_type = lockType;
    f.l_whence = SEEK_SET;
    f.l_start = ofst;
    f.l_len = n;
    rc = osSetPosixAdvisoryLock(pShmNode->h, &f, pFile);
    rc = (rc!=(-1)) ? SQLITE_OK : SQLITE_BUSY;
  }

  /* Update the global lock state and do debug tracing */
#ifdef SQLITE_DEBUG
  { u16 mask;
  OSTRACE(("SHM-LOCK "));
................................................................................
static void unixShmPurge(unixFile *pFd){
  unixShmNode *p = pFd->pInode->pShmNode;
  assert( unixMutexHeld() );
  if( p && ALWAYS(p->nRef==0) ){
    int nShmPerMap = unixShmRegionPerMap();
    int i;
    assert( p->pInode==pFd->pInode );
    sqlite3_mutex_free(p->mutex);
    for(i=0; i<p->nRegion; i+=nShmPerMap){
      if( p->h>=0 ){
        osMunmap(p->apRegion[i], p->szRegion);
      }else{
        sqlite3_free(p->apRegion[i]);
      }
    }
    sqlite3_free(p->apRegion);
    if( p->h>=0 ){
      robust_close(pFd, p->h, __LINE__);
      p->h = -1;
    }
    p->pInode->pShmNode = 0;
    sqlite3_free(p);
  }
}

/*
................................................................................
  ** process might open and use the *-shm file without truncating it.
  ** And if the *-shm file has been corrupted by a power failure or
  ** system crash, the database itself may also become corrupt.  */
  lock.l_whence = SEEK_SET;
  lock.l_start = UNIX_SHM_DMS;
  lock.l_len = 1;
  lock.l_type = F_WRLCK;
  if( osFcntl(pShmNode->h, F_GETLK, &lock)!=0 ) {
    rc = SQLITE_IOERR_LOCK;
  }else if( lock.l_type==F_UNLCK ){
    if( pShmNode->isReadonly ){
      pShmNode->isUnlocked = 1;
      rc = SQLITE_READONLY_CANTINIT;
    }else{
      rc = unixShmSystemLock(pDbFd, F_WRLCK, UNIX_SHM_DMS, 1);
      if( rc==SQLITE_OK && robust_ftruncate(pShmNode->h, 0) ){
        rc = unixLogError(SQLITE_IOERR_SHMOPEN,"ftruncate",pShmNode->zFilename);
      }
    }
  }else if( lock.l_type==F_WRLCK ){
    rc = SQLITE_BUSY;
  }

................................................................................
    sqlite3_snprintf(nShmFilename, zShm, 
                     SQLITE_SHM_DIRECTORY "/sqlite-shm-%x-%x",
                     (u32)sStat.st_ino, (u32)sStat.st_dev);
#else
    sqlite3_snprintf(nShmFilename, zShm, "%s-shm", zBasePath);
    sqlite3FileSuffix3(pDbFd->zPath, zShm);
#endif
    pShmNode->h = -1;
    pDbFd->pInode->pShmNode = pShmNode;
    pShmNode->pInode = pDbFd->pInode;
    if( sqlite3GlobalConfig.bCoreMutex ){
      pShmNode->mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
      if( pShmNode->mutex==0 ){
        rc = SQLITE_NOMEM_BKPT;
        goto shm_open_err;
      }
    }

    if( pInode->bProcessLock==0 ){
#ifdef __APPLE__
................................................................................
      /* On MacOS and iOS, avoid even trying to open a read-only SHM file
      ** for writing, because doing so generates scary log messages */
      if( osAccess(zShm, R_OK|W_OK)!=0 && (errno==EPERM || errno==EACCES) ){
        pShmNode->h = -1;
      }else
#endif
      if( 0==sqlite3_uri_boolean(pDbFd->zPath, "readonly_shm", 0) ){
        pShmNode->h = robust_open(zShm, O_RDWR|O_CREAT, (sStat.st_mode&0777));
      }
      if( pShmNode->h<0 ){
        pShmNode->h = robust_open(zShm, O_RDONLY, (sStat.st_mode&0777));
        if( pShmNode->h<0 ){
          rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShm);
          goto shm_open_err;
        }
        pShmNode->isReadonly = 1;
      }

      /* If this process is running as root, make sure that the SHM file
      ** is owned by the same user that owns the original database.  Otherwise,
      ** the original owner will not be able to connect.
      */
      robustFchown(pShmNode->h, sStat.st_uid, sStat.st_gid);

      rc = unixLockSharedMemory(pDbFd, pShmNode);
      if( rc!=SQLITE_OK && rc!=SQLITE_READONLY_CANTINIT ) goto shm_open_err;
    }
  }

  /* Make the new connection a child of the unixShmNode */
................................................................................
  pDbFd->pShm = p;
  unixLeaveMutex();

  /* The reference count on pShmNode has already been incremented under
  ** the cover of the unixEnterMutex() mutex and the pointer from the
  ** new (struct unixShm) object to the pShmNode has been set. All that is
  ** left to do is to link the new object into the linked list starting
  ** at pShmNode->pFirst. This must be done while holding the pShmNode->mutex 
  ** mutex.
  */
  sqlite3_mutex_enter(pShmNode->mutex);
  p->pNext = pShmNode->pFirst;
  pShmNode->pFirst = p;
  sqlite3_mutex_leave(pShmNode->mutex);
  return rc;

  /* Jump here on any error */
shm_open_err:
  unixShmPurge(pDbFd);       /* This call frees pShmNode if required */
  sqlite3_free(p);
  unixLeaveMutex();
................................................................................
  if( pDbFd->pShm==0 ){
    rc = unixOpenSharedMemory(pDbFd);
    if( rc!=SQLITE_OK ) return rc;
  }

  p = pDbFd->pShm;
  pShmNode = p->pShmNode;
  sqlite3_mutex_enter(pShmNode->mutex);
  if( pShmNode->isUnlocked ){
    rc = unixLockSharedMemory(pDbFd, pShmNode);
    if( rc!=SQLITE_OK ) goto shmpage_out;
    pShmNode->isUnlocked = 0;
  }
  assert( szRegion==pShmNode->szRegion || pShmNode->nRegion==0 );
  assert( pShmNode->pInode==pDbFd->pInode );
  assert( pShmNode->h>=0 || pDbFd->pInode->bProcessLock==1 );
  assert( pShmNode->h<0 || pDbFd->pInode->bProcessLock==0 );

  /* Minimum number of regions required to be mapped. */
  nReqRegion = ((iRegion+nShmPerMap) / nShmPerMap) * nShmPerMap;

  if( pShmNode->nRegion<nReqRegion ){
    char **apNew;                      /* New apRegion[] array */
    int nByte = nReqRegion*szRegion;   /* Minimum required file size */
    struct stat sStat;                 /* Used by fstat() */

    pShmNode->szRegion = szRegion;

    if( pShmNode->h>=0 ){
      /* The requested region is not mapped into this processes address space.
      ** Check to see if it has been allocated (i.e. if the wal-index file is
      ** large enough to contain the requested region).
      */
      if( osFstat(pShmNode->h, &sStat) ){
        rc = SQLITE_IOERR_SHMSIZE;
        goto shmpage_out;
      }
  
      if( sStat.st_size<nByte ){
        /* The requested memory region does not exist. If bExtend is set to
        ** false, exit early. *pp will be set to NULL and SQLITE_OK returned.
................................................................................
          static const int pgsz = 4096;
          int iPg;

          /* Write to the last byte of each newly allocated or extended page */
          assert( (nByte % pgsz)==0 );
          for(iPg=(sStat.st_size/pgsz); iPg<(nByte/pgsz); iPg++){
            int x = 0;
            if( seekAndWriteFd(pShmNode->h, iPg*pgsz + pgsz-1, "", 1, &x)!=1 ){
              const char *zFile = pShmNode->zFilename;
              rc = unixLogError(SQLITE_IOERR_SHMSIZE, "write", zFile);
              goto shmpage_out;
            }
          }
        }
      }
................................................................................
      goto shmpage_out;
    }
    pShmNode->apRegion = apNew;
    while( pShmNode->nRegion<nReqRegion ){
      int nMap = szRegion*nShmPerMap;
      int i;
      void *pMem;
      if( pShmNode->h>=0 ){
        pMem = osMmap(0, nMap,
            pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE, 
            MAP_SHARED, pShmNode->h, szRegion*(i64)pShmNode->nRegion
        );
        if( pMem==MAP_FAILED ){
          rc = unixLogError(SQLITE_IOERR_SHMMAP, "mmap", pShmNode->zFilename);
          goto shmpage_out;
        }
      }else{
        pMem = sqlite3_malloc64(szRegion);
................................................................................
shmpage_out:
  if( pShmNode->nRegion>iRegion ){
    *pp = pShmNode->apRegion[iRegion];
  }else{
    *pp = 0;
  }
  if( pShmNode->isReadonly && rc==SQLITE_OK ) rc = SQLITE_READONLY;
  sqlite3_mutex_leave(pShmNode->mutex);
  return rc;
}

/*
** Change the lock state for a shared-memory segment.
**
** Note that the relationship between SHAREd and EXCLUSIVE locks is a little
................................................................................
  assert( ofst>=0 && ofst+n<=SQLITE_SHM_NLOCK );
  assert( n>=1 );
  assert( flags==(SQLITE_SHM_LOCK | SQLITE_SHM_SHARED)
       || flags==(SQLITE_SHM_LOCK | SQLITE_SHM_EXCLUSIVE)
       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_SHARED)
       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_EXCLUSIVE) );
  assert( n==1 || (flags & SQLITE_SHM_EXCLUSIVE)!=0 );
  assert( pShmNode->h>=0 || pDbFd->pInode->bProcessLock==1 );
  assert( pShmNode->h<0 || pDbFd->pInode->bProcessLock==0 );

  mask = (1<<(ofst+n)) - (1<<ofst);
  assert( n>1 || mask==(1<<ofst) );
  sqlite3_mutex_enter(pShmNode->mutex);
  if( flags & SQLITE_SHM_UNLOCK ){
    u16 allMask = 0; /* Mask of locks held by siblings */

    /* See if any siblings hold this same lock */
    for(pX=pShmNode->pFirst; pX; pX=pX->pNext){
      if( pX==p ) continue;
      assert( (pX->exclMask & (p->exclMask|p->sharedMask))==0 );
................................................................................
      rc = unixShmSystemLock(pDbFd, F_WRLCK, ofst+UNIX_SHM_BASE, n);
      if( rc==SQLITE_OK ){
        assert( (p->sharedMask & mask)==0 );
        p->exclMask |= mask;
      }
    }
  }
  sqlite3_mutex_leave(pShmNode->mutex);
  OSTRACE(("SHM-LOCK shmid-%d, pid-%d got %03x,%03x\n",
           p->id, osGetpid(0), p->sharedMask, p->exclMask));
  return rc;
}

/*
** Implement a memory barrier or memory fence on shared memory.  
................................................................................
  pShmNode = p->pShmNode;

  assert( pShmNode==pDbFd->pInode->pShmNode );
  assert( pShmNode->pInode==pDbFd->pInode );

  /* Remove connection p from the set of connections associated
  ** with pShmNode */
  sqlite3_mutex_enter(pShmNode->mutex);
  for(pp=&pShmNode->pFirst; (*pp)!=p; pp = &(*pp)->pNext){}
  *pp = p->pNext;

  /* Free the connection p */
  sqlite3_free(p);
  pDbFd->pShm = 0;
  sqlite3_mutex_leave(pShmNode->mutex);

  /* If pShmNode->nRef has reached 0, then close the underlying
  ** shared-memory file, too */
  assert( unixFileMutexNotheld(pDbFd) );
  unixEnterMutex();
  assert( pShmNode->nRef>0 );
  pShmNode->nRef--;
  if( pShmNode->nRef==0 ){
    if( deleteFlag && pShmNode->h>=0 ) {
      if (deleteFlag == 1) { 
        osUnlink(pShmNode->zFilename);
      } else if (deleteFlag == 2) {
        /* ftruncate(pShmNode->h, 32 * 1024); */
      }
    }
    unixShmPurge(pDbFd);
  }
  unixLeaveMutex();

  return SQLITE_OK;

/*
** Allowed values of unixFile.fsFlags
*/
#define SQLITE_FSFLAGS_IS_MSDOS     0x1

/*
** If we are to be thread-safe, include the pthreads header.

*/
#if SQLITE_THREADSAFE
# include <pthread.h>

#endif

/*
** Default permissions when creating a new file
*/
#ifndef SQLITE_DEFAULT_FILE_PERMISSIONS
# define SQLITE_DEFAULT_FILE_PERMISSIONS 0644
................................................................................
  { "lstat",         (sqlite3_syscall_ptr)lstat,          0 },
#else
  { "lstat",         (sqlite3_syscall_ptr)0,              0 },
#endif
#define osLstat      ((int(*)(const char*,struct stat*))aSyscall[27].pCurrent)

#if defined(__linux__) && defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)
# ifdef __ANDROID__
  { "ioctl", (sqlite3_syscall_ptr)(int(*)(int, int, ...))ioctl, 0 },
# else
  { "ioctl",         (sqlite3_syscall_ptr)ioctl,          0 },
# endif
#else
  { "ioctl",         (sqlite3_syscall_ptr)0,              0 },
#endif
#define osIoctl ((int(*)(int,int,...))aSyscall[28].pCurrent)

}; /* End of the overrideable system calls */

................................................................................
  /* WAS:  ino_t ino;   */
  u64 ino;                   /* Inode number */
#endif
};

/*
** An instance of the following structure is allocated for each open
** inode.

**
** A single inode can have multiple file descriptors, so each unixFile
** structure contains a pointer to an instance of this object and this
** object keeps a count of the number of unixFile pointing to it.
**
** Mutex rules:
**
................................................................................
  sem_t *pSem;                    /* Named POSIX semaphore */
  char aSemName[MAX_PATHNAME+2];  /* Name of that semaphore */
#endif
};

/*
** A lists of all unixInodeInfo objects.
**
** Must hold unixBigLock in order to read or write this variable.
*/
static unixInodeInfo *inodeList = 0;  /* All unixInodeInfo objects */

#ifdef SQLITE_DEBUG
/*
** True if the inode mutex (on the unixFile.pFileMutex field) is held, or not.
** This routine is used only within assert() to help verify correct mutex
** usage.
*/
int unixFileMutexHeld(unixFile *pFile){
  assert( pFile->pInode );
  return sqlite3_mutex_held(pFile->pInode->pLockMutex);
}
int unixFileMutexNotheld(unixFile *pFile){
  assert( pFile->pInode );
................................................................................
  }
  pInode->pUnused = 0;
}

/*
** Release a unixInodeInfo structure previously allocated by findInodeInfo().
**
** The global mutex must be held when this routine is called, but the mutex
** on the inode being deleted must NOT be held.
*/
static void releaseInodeInfo(unixFile *pFile){
  unixInodeInfo *pInode = pFile->pInode;
  assert( unixMutexHeld() );
  assert( unixFileMutexNotheld(pFile) );
  if( ALWAYS(pInode) ){
    pInode->nRef--;
................................................................................
}

/*
** Given a file descriptor, locate the unixInodeInfo object that
** describes that file descriptor.  Create a new one if necessary.  The
** return value might be uninitialized if an error occurs.
**
** The global mutex must held when calling this routine.

**
** Return an appropriate error code.
*/
static int findInodeInfo(
  unixFile *pFile,               /* Unix file with file desc used in the key */
  unixInodeInfo **ppInode        /* Return the unixInodeInfo object here */
){
................................................................................
  memset(&fileId, 0, sizeof(fileId));
  fileId.dev = statbuf.st_dev;
#if OS_VXWORKS
  fileId.pId = pFile->pId;
#else
  fileId.ino = (u64)statbuf.st_ino;
#endif
  assert( unixMutexHeld() );
  pInode = inodeList;
  while( pInode && memcmp(&fileId, &pInode->fileId, sizeof(fileId)) ){
    pInode = pInode->pNext;
  }
  if( pInode==0 ){
    pInode = sqlite3_malloc64( sizeof(*pInode) );
    if( pInode==0 ){
................................................................................
      pInode->pLockMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
      if( pInode->pLockMutex==0 ){
        sqlite3_free(pInode);
        return SQLITE_NOMEM_BKPT;
      }
    }
    pInode->nRef = 1;
    assert( unixMutexHeld() );
    pInode->pNext = inodeList;
    pInode->pPrev = 0;
    if( inodeList ) inodeList->pPrev = pInode;
    inodeList = pInode;
  }else{
    pInode->nRef++;
  }
................................................................................
** unixMutexHeld() must be true when creating or destroying
** this object or while reading or writing the following fields:
**
**      nRef
**
** The following fields are read-only after the object is created:
** 
**      hShm
**      zFilename
**
** Either unixShmNode.pShmMutex must be held or unixShmNode.nRef==0 and
** unixMutexHeld() is true when reading or writing any other field
** in this structure.
*/
struct unixShmNode {
  unixInodeInfo *pInode;     /* unixInodeInfo that owns this SHM node */
  sqlite3_mutex *pShmMutex;  /* Mutex to access this object */
  char *zFilename;           /* Name of the mmapped file */
  int hShm;                  /* Open file descriptor */
  int szRegion;              /* Size of shared-memory regions */
  u16 nRegion;               /* Size of array apRegion */
  u8 isReadonly;             /* True if read-only */
  u8 isUnlocked;             /* True if no DMS lock held */
  char **apRegion;           /* Array of mapped shared-memory regions */
  int nRef;                  /* Number of unixShm objects pointing to this */
  unixShm *pFirst;           /* All unixShm objects pointing to this */
................................................................................
/*
** Structure used internally by this VFS to record the state of an
** open shared memory connection.
**
** The following fields are initialized when this object is created and
** are read-only thereafter:
**
**    unixShm.pShmNode
**    unixShm.id
**
** All other fields are read/write.  The unixShm.pShmNode->pShmMutex must
** be held while accessing any read/write fields.
*/
struct unixShm {
  unixShmNode *pShmNode;     /* The underlying unixShmNode object */
  unixShm *pNext;            /* Next unixShm with the same unixShmNode */
  u8 hasMutex;               /* True if holding the unixShmNode->pShmMutex */
  u8 id;                     /* Id of this connection within its unixShmNode */
  u16 sharedMask;            /* Mask of shared locks held */
  u16 exclMask;              /* Mask of exclusive locks held */
};

/*
** Constants used for locking
................................................................................
){
  unixShmNode *pShmNode; /* Apply locks to this open shared-memory segment */
  struct flock f;        /* The posix advisory locking structure */
  int rc = SQLITE_OK;    /* Result code form fcntl() */

  /* Access to the unixShmNode object is serialized by the caller */
  pShmNode = pFile->pInode->pShmNode;
  assert( pShmNode->nRef==0 || sqlite3_mutex_held(pShmNode->pShmMutex) );
  assert( pShmNode->nRef>0 || unixMutexHeld() );

  /* Shared locks never span more than one byte */
  assert( n==1 || lockType!=F_RDLCK );

  /* Locks are within range */
  assert( n>=1 && n<=SQLITE_SHM_NLOCK );

  if( pShmNode->hShm>=0 ){
    /* Initialize the locking parameters */
    f.l_type = lockType;
    f.l_whence = SEEK_SET;
    f.l_start = ofst;
    f.l_len = n;
    rc = osSetPosixAdvisoryLock(pShmNode->hShm, &f, pFile);
    rc = (rc!=(-1)) ? SQLITE_OK : SQLITE_BUSY;
  }

  /* Update the global lock state and do debug tracing */
#ifdef SQLITE_DEBUG
  { u16 mask;
  OSTRACE(("SHM-LOCK "));
................................................................................
static void unixShmPurge(unixFile *pFd){
  unixShmNode *p = pFd->pInode->pShmNode;
  assert( unixMutexHeld() );
  if( p && ALWAYS(p->nRef==0) ){
    int nShmPerMap = unixShmRegionPerMap();
    int i;
    assert( p->pInode==pFd->pInode );
    sqlite3_mutex_free(p->pShmMutex);
    for(i=0; i<p->nRegion; i+=nShmPerMap){
      if( p->hShm>=0 ){
        osMunmap(p->apRegion[i], p->szRegion);
      }else{
        sqlite3_free(p->apRegion[i]);
      }
    }
    sqlite3_free(p->apRegion);
    if( p->hShm>=0 ){
      robust_close(pFd, p->hShm, __LINE__);
      p->hShm = -1;
    }
    p->pInode->pShmNode = 0;
    sqlite3_free(p);
  }
}

/*
................................................................................
  ** process might open and use the *-shm file without truncating it.
  ** And if the *-shm file has been corrupted by a power failure or
  ** system crash, the database itself may also become corrupt.  */
  lock.l_whence = SEEK_SET;
  lock.l_start = UNIX_SHM_DMS;
  lock.l_len = 1;
  lock.l_type = F_WRLCK;
  if( osFcntl(pShmNode->hShm, F_GETLK, &lock)!=0 ) {
    rc = SQLITE_IOERR_LOCK;
  }else if( lock.l_type==F_UNLCK ){
    if( pShmNode->isReadonly ){
      pShmNode->isUnlocked = 1;
      rc = SQLITE_READONLY_CANTINIT;
    }else{
      rc = unixShmSystemLock(pDbFd, F_WRLCK, UNIX_SHM_DMS, 1);
      if( rc==SQLITE_OK && robust_ftruncate(pShmNode->hShm, 0) ){
        rc = unixLogError(SQLITE_IOERR_SHMOPEN,"ftruncate",pShmNode->zFilename);
      }
    }
  }else if( lock.l_type==F_WRLCK ){
    rc = SQLITE_BUSY;
  }

................................................................................
    sqlite3_snprintf(nShmFilename, zShm, 
                     SQLITE_SHM_DIRECTORY "/sqlite-shm-%x-%x",
                     (u32)sStat.st_ino, (u32)sStat.st_dev);
#else
    sqlite3_snprintf(nShmFilename, zShm, "%s-shm", zBasePath);
    sqlite3FileSuffix3(pDbFd->zPath, zShm);
#endif
    pShmNode->hShm = -1;
    pDbFd->pInode->pShmNode = pShmNode;
    pShmNode->pInode = pDbFd->pInode;
    if( sqlite3GlobalConfig.bCoreMutex ){
      pShmNode->pShmMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
      if( pShmNode->pShmMutex==0 ){
        rc = SQLITE_NOMEM_BKPT;
        goto shm_open_err;
      }
    }

    if( pInode->bProcessLock==0 ){
#ifdef __APPLE__
................................................................................
      /* On MacOS and iOS, avoid even trying to open a read-only SHM file
      ** for writing, because doing so generates scary log messages */
      if( osAccess(zShm, R_OK|W_OK)!=0 && (errno==EPERM || errno==EACCES) ){
        pShmNode->h = -1;
      }else
#endif
      if( 0==sqlite3_uri_boolean(pDbFd->zPath, "readonly_shm", 0) ){
        pShmNode->hShm = robust_open(zShm, O_RDWR|O_CREAT,(sStat.st_mode&0777));
      }
      if( pShmNode->hShm<0 ){
        pShmNode->hShm = robust_open(zShm, O_RDONLY, (sStat.st_mode&0777));
        if( pShmNode->hShm<0 ){
          rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShm);
          goto shm_open_err;
        }
        pShmNode->isReadonly = 1;
      }

      /* If this process is running as root, make sure that the SHM file
      ** is owned by the same user that owns the original database.  Otherwise,
      ** the original owner will not be able to connect.
      */
      robustFchown(pShmNode->hShm, sStat.st_uid, sStat.st_gid);

      rc = unixLockSharedMemory(pDbFd, pShmNode);
      if( rc!=SQLITE_OK && rc!=SQLITE_READONLY_CANTINIT ) goto shm_open_err;
    }
  }

  /* Make the new connection a child of the unixShmNode */
................................................................................
  pDbFd->pShm = p;
  unixLeaveMutex();

  /* The reference count on pShmNode has already been incremented under
  ** the cover of the unixEnterMutex() mutex and the pointer from the
  ** new (struct unixShm) object to the pShmNode has been set. All that is
  ** left to do is to link the new object into the linked list starting
  ** at pShmNode->pFirst. This must be done while holding the
  ** pShmNode->pShmMutex.
  */
  sqlite3_mutex_enter(pShmNode->pShmMutex);
  p->pNext = pShmNode->pFirst;
  pShmNode->pFirst = p;
  sqlite3_mutex_leave(pShmNode->pShmMutex);
  return rc;

  /* Jump here on any error */
shm_open_err:
  unixShmPurge(pDbFd);       /* This call frees pShmNode if required */
  sqlite3_free(p);
  unixLeaveMutex();
................................................................................
  if( pDbFd->pShm==0 ){
    rc = unixOpenSharedMemory(pDbFd);
    if( rc!=SQLITE_OK ) return rc;
  }

  p = pDbFd->pShm;
  pShmNode = p->pShmNode;
  sqlite3_mutex_enter(pShmNode->pShmMutex);
  if( pShmNode->isUnlocked ){
    rc = unixLockSharedMemory(pDbFd, pShmNode);
    if( rc!=SQLITE_OK ) goto shmpage_out;
    pShmNode->isUnlocked = 0;
  }
  assert( szRegion==pShmNode->szRegion || pShmNode->nRegion==0 );
  assert( pShmNode->pInode==pDbFd->pInode );
  assert( pShmNode->hShm>=0 || pDbFd->pInode->bProcessLock==1 );
  assert( pShmNode->hShm<0 || pDbFd->pInode->bProcessLock==0 );

  /* Minimum number of regions required to be mapped. */
  nReqRegion = ((iRegion+nShmPerMap) / nShmPerMap) * nShmPerMap;

  if( pShmNode->nRegion<nReqRegion ){
    char **apNew;                      /* New apRegion[] array */
    int nByte = nReqRegion*szRegion;   /* Minimum required file size */
    struct stat sStat;                 /* Used by fstat() */

    pShmNode->szRegion = szRegion;

    if( pShmNode->hShm>=0 ){
      /* The requested region is not mapped into this processes address space.
      ** Check to see if it has been allocated (i.e. if the wal-index file is
      ** large enough to contain the requested region).
      */
      if( osFstat(pShmNode->hShm, &sStat) ){
        rc = SQLITE_IOERR_SHMSIZE;
        goto shmpage_out;
      }
  
      if( sStat.st_size<nByte ){
        /* The requested memory region does not exist. If bExtend is set to
        ** false, exit early. *pp will be set to NULL and SQLITE_OK returned.
................................................................................
          static const int pgsz = 4096;
          int iPg;

          /* Write to the last byte of each newly allocated or extended page */
          assert( (nByte % pgsz)==0 );
          for(iPg=(sStat.st_size/pgsz); iPg<(nByte/pgsz); iPg++){
            int x = 0;
            if( seekAndWriteFd(pShmNode->hShm, iPg*pgsz + pgsz-1,"",1,&x)!=1 ){
              const char *zFile = pShmNode->zFilename;
              rc = unixLogError(SQLITE_IOERR_SHMSIZE, "write", zFile);
              goto shmpage_out;
            }
          }
        }
      }
................................................................................
      goto shmpage_out;
    }
    pShmNode->apRegion = apNew;
    while( pShmNode->nRegion<nReqRegion ){
      int nMap = szRegion*nShmPerMap;
      int i;
      void *pMem;
      if( pShmNode->hShm>=0 ){
        pMem = osMmap(0, nMap,
            pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE, 
            MAP_SHARED, pShmNode->hShm, szRegion*(i64)pShmNode->nRegion
        );
        if( pMem==MAP_FAILED ){
          rc = unixLogError(SQLITE_IOERR_SHMMAP, "mmap", pShmNode->zFilename);
          goto shmpage_out;
        }
      }else{
        pMem = sqlite3_malloc64(szRegion);
................................................................................
shmpage_out:
  if( pShmNode->nRegion>iRegion ){
    *pp = pShmNode->apRegion[iRegion];
  }else{
    *pp = 0;
  }
  if( pShmNode->isReadonly && rc==SQLITE_OK ) rc = SQLITE_READONLY;
  sqlite3_mutex_leave(pShmNode->pShmMutex);
  return rc;
}

/*
** Change the lock state for a shared-memory segment.
**
** Note that the relationship between SHAREd and EXCLUSIVE locks is a little
................................................................................
  assert( ofst>=0 && ofst+n<=SQLITE_SHM_NLOCK );
  assert( n>=1 );
  assert( flags==(SQLITE_SHM_LOCK | SQLITE_SHM_SHARED)
       || flags==(SQLITE_SHM_LOCK | SQLITE_SHM_EXCLUSIVE)
       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_SHARED)
       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_EXCLUSIVE) );
  assert( n==1 || (flags & SQLITE_SHM_EXCLUSIVE)!=0 );
  assert( pShmNode->hShm>=0 || pDbFd->pInode->bProcessLock==1 );
  assert( pShmNode->hShm<0 || pDbFd->pInode->bProcessLock==0 );

  mask = (1<<(ofst+n)) - (1<<ofst);
  assert( n>1 || mask==(1<<ofst) );
  sqlite3_mutex_enter(pShmNode->pShmMutex);
  if( flags & SQLITE_SHM_UNLOCK ){
    u16 allMask = 0; /* Mask of locks held by siblings */

    /* See if any siblings hold this same lock */
    for(pX=pShmNode->pFirst; pX; pX=pX->pNext){
      if( pX==p ) continue;
      assert( (pX->exclMask & (p->exclMask|p->sharedMask))==0 );
................................................................................
      rc = unixShmSystemLock(pDbFd, F_WRLCK, ofst+UNIX_SHM_BASE, n);
      if( rc==SQLITE_OK ){
        assert( (p->sharedMask & mask)==0 );
        p->exclMask |= mask;
      }
    }
  }
  sqlite3_mutex_leave(pShmNode->pShmMutex);
  OSTRACE(("SHM-LOCK shmid-%d, pid-%d got %03x,%03x\n",
           p->id, osGetpid(0), p->sharedMask, p->exclMask));
  return rc;
}

/*
** Implement a memory barrier or memory fence on shared memory.  
................................................................................
  pShmNode = p->pShmNode;

  assert( pShmNode==pDbFd->pInode->pShmNode );
  assert( pShmNode->pInode==pDbFd->pInode );

  /* Remove connection p from the set of connections associated
  ** with pShmNode */
  sqlite3_mutex_enter(pShmNode->pShmMutex);
  for(pp=&pShmNode->pFirst; (*pp)!=p; pp = &(*pp)->pNext){}
  *pp = p->pNext;

  /* Free the connection p */
  sqlite3_free(p);
  pDbFd->pShm = 0;
  sqlite3_mutex_leave(pShmNode->pShmMutex);

  /* If pShmNode->nRef has reached 0, then close the underlying
  ** shared-memory file, too */
  assert( unixFileMutexNotheld(pDbFd) );
  unixEnterMutex();
  assert( pShmNode->nRef>0 );
  pShmNode->nRef--;
  if( pShmNode->nRef==0 ){
    if( deleteFlag && pShmNode->hShm>=0 ) {
      if (deleteFlag == 1) { 
        osUnlink(pShmNode->zFilename);
      } else if (deleteFlag == 2) {
        /* ftruncate(pShmNode->hShm, 32 * 1024); */
      }
    }
    unixShmPurge(pDbFd);
  }
  unixLeaveMutex();

  return SQLITE_OK;

      p->op = (u8)op;
      p->affinity = 0;
      p->flags = EP_Leaf;
      p->iAgg = -1;
      p->pLeft = p->pRight = 0;
      p->x.pList = 0;
      p->pAggInfo = 0;
      p->pTab = 0;
      p->op2 = 0;
      p->iTable = 0;
      p->iColumn = 0;
#ifndef SQLITE_OMIT_WINDOWFUNC
      p->pWin = 0;
#endif
      p->u.zToken = (char*)&p[1];
      memcpy(p->u.zToken, t.z, t.n);
      p->u.zToken[t.n] = 0;
      if( sqlite3Isquote(p->u.zToken[0]) ){
        if( p->u.zToken[0]=='"' ) p->flags |= EP_DblQuoted;
        sqlite3Dequote(p->u.zToken);
      }

      p->op = (u8)op;
      p->affinity = 0;
      p->flags = EP_Leaf;
      p->iAgg = -1;
      p->pLeft = p->pRight = 0;
      p->x.pList = 0;
      p->pAggInfo = 0;
      p->y.pTab = 0;
      p->op2 = 0;
      p->iTable = 0;
      p->iColumn = 0;



      p->u.zToken = (char*)&p[1];
      memcpy(p->u.zToken, t.z, t.n);
      p->u.zToken[t.n] = 0;
      if( sqlite3Isquote(p->u.zToken[0]) ){
        if( p->u.zToken[0]=='"' ) p->flags |= EP_DblQuoted;
        sqlite3Dequote(p->u.zToken);
      }

**   such that p was added to the list more recently than p->pDirtyNext.
**   PCache.pDirty points to the first (newest) element in the list and
**   pDirtyTail to the last (oldest).
**
**   The PCache.pSynced variable is used to optimize searching for a dirty
**   page to eject from the cache mid-transaction. It is better to eject
**   a page that does not require a journal sync than one that does. 
**   Therefore, pSynced is maintained to that it *almost* always points
**   to either the oldest page in the pDirty/pDirtyTail list that has a
**   clear PGHDR_NEED_SYNC flag or to a page that is older than this one
**   (so that the right page to eject can be found by following pDirtyPrev
**   pointers).
*/
struct PCache {
  PgHdr *pDirty, *pDirtyTail;         /* List of dirty pages in LRU order */

**   such that p was added to the list more recently than p->pDirtyNext.
**   PCache.pDirty points to the first (newest) element in the list and
**   pDirtyTail to the last (oldest).
**
**   The PCache.pSynced variable is used to optimize searching for a dirty
**   page to eject from the cache mid-transaction. It is better to eject
**   a page that does not require a journal sync than one that does. 
**   Therefore, pSynced is maintained so that it *almost* always points
**   to either the oldest page in the pDirty/pDirtyTail list that has a
**   clear PGHDR_NEED_SYNC flag or to a page that is older than this one
**   (so that the right page to eject can be found by following pDirtyPrev
**   pointers).
*/
struct PCache {
  PgHdr *pDirty, *pDirtyTail;         /* List of dirty pages in LRU order */

    Table *pTab;
    pTab = sqlite3LocateTable(pParse, LOCATE_NOERR, zRight, zDb);
    if( pTab ){
      int i, k;
      int nHidden = 0;
      Column *pCol;
      Index *pPk = sqlite3PrimaryKeyIndex(pTab);
      pParse->nMem = 6;
      sqlite3CodeVerifySchema(pParse, iDb);
      sqlite3ViewGetColumnNames(pParse, pTab);
      for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
        if( IsHiddenColumn(pCol) ){

          nHidden++;
          continue;
        }
        if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){
          k = 0;
        }else if( pPk==0 ){
          k = 1;
        }else{
          for(k=1; k<=pTab->nCol && pPk->aiColumn[k-1]!=i; k++){}
        }
        assert( pCol->pDflt==0 || pCol->pDflt->op==TK_SPAN );
        sqlite3VdbeMultiLoad(v, 1, "issisi",
               i-nHidden,
               pCol->zName,
               sqlite3ColumnType(pCol,""),
               pCol->notNull ? 1 : 0,
               pCol->pDflt ? pCol->pDflt->u.zToken : 0,
               k);

      }
    }
  }
  break;

#ifdef SQLITE_DEBUG
  case PragTyp_STATS: {

    Table *pTab;
    pTab = sqlite3LocateTable(pParse, LOCATE_NOERR, zRight, zDb);
    if( pTab ){
      int i, k;
      int nHidden = 0;
      Column *pCol;
      Index *pPk = sqlite3PrimaryKeyIndex(pTab);
      pParse->nMem = 7;
      sqlite3CodeVerifySchema(pParse, iDb);
      sqlite3ViewGetColumnNames(pParse, pTab);
      for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
        int isHidden = IsHiddenColumn(pCol);
        if( isHidden && pPragma->iArg==0 ){
          nHidden++;
          continue;
        }
        if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){
          k = 0;
        }else if( pPk==0 ){
          k = 1;
        }else{
          for(k=1; k<=pTab->nCol && pPk->aiColumn[k-1]!=i; k++){}
        }
        assert( pCol->pDflt==0 || pCol->pDflt->op==TK_SPAN );
        sqlite3VdbeMultiLoad(v, 1, pPragma->iArg ? "issisii" : "issisi",
               i-nHidden,
               pCol->zName,
               sqlite3ColumnType(pCol,""),
               pCol->notNull ? 1 : 0,
               pCol->pDflt ? pCol->pDflt->u.zToken : 0,
               k,
               isHidden);
      }
    }
  }
  break;

#ifdef SQLITE_DEBUG
  case PragTyp_STATS: {

#define PragFlg_SchemaReq  0x80 /* Schema required - "main" is default */

/* Names of columns for pragmas that return multi-column result
** or that return single-column results where the name of the
** result column is different from the name of the pragma
*/
static const char *const pragCName[] = {
  /*   0 */ "cache_size",  /* Used by: default_cache_size */
  /*   1 */ "cid",         /* Used by: table_info */
  /*   2 */ "name",       
  /*   3 */ "type",       
  /*   4 */ "notnull",    
  /*   5 */ "dflt_value", 
  /*   6 */ "pk",         
  /*   7 */ "tbl",         /* Used by: stats */
  /*   8 */ "idx",        
  /*   9 */ "wdth",       
  /*  10 */ "hght",       
  /*  11 */ "flgs",       
  /*  12 */ "seqno",       /* Used by: index_info */
  /*  13 */ "cid",        
  /*  14 */ "name",       

  /*  15 */ "seqno",       /* Used by: index_xinfo */
  /*  16 */ "cid",        
  /*  17 */ "name",       
  /*  18 */ "desc",       
  /*  19 */ "coll",       
  /*  20 */ "key",        
  /*  21 */ "seq",         /* Used by: index_list */
  /*  22 */ "name",       
  /*  23 */ "unique",     
  /*  24 */ "origin",     
  /*  25 */ "partial",    
  /*  26 */ "seq",         /* Used by: database_list */
  /*  27 */ "name",       
  /*  28 */ "file",       
  /*  29 */ "name",        /* Used by: function_list */
  /*  30 */ "builtin",    
  /*  31 */ "name",        /* Used by: module_list pragma_list */
  /*  32 */ "seq",         /* Used by: collation_list */
  /*  33 */ "name",       
  /*  34 */ "id",          /* Used by: foreign_key_list */

  /*  35 */ "seq",        
  /*  36 */ "table",      
  /*  37 */ "from",       
  /*  38 */ "to",         

  /*  39 */ "on_update",  
  /*  40 */ "on_delete",  
  /*  41 */ "match",      
  /*  42 */ "table",       /* Used by: foreign_key_check */
  /*  43 */ "rowid",      


  /*  44 */ "parent",     
  /*  45 */ "fkid",       
  /*  46 */ "busy",        /* Used by: wal_checkpoint */
  /*  47 */ "log",        
  /*  48 */ "checkpointed",
  /*  49 */ "timeout",     /* Used by: busy_timeout */
  /*  50 */ "database",    /* Used by: lock_status */
  /*  51 */ "status",     
};

/* Definitions of all built-in pragmas */
typedef struct PragmaName {
  const char *const zName; /* Name of pragma */
  u8 ePragTyp;             /* PragTyp_XXX value */
  u8 mPragFlg;             /* Zero or more PragFlg_XXX values */
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_AutoIndex },
#endif
#endif
 {/* zName:     */ "busy_timeout",
  /* ePragTyp:  */ PragTyp_BUSY_TIMEOUT,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 49, 1,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "cache_size",
  /* ePragTyp:  */ PragTyp_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_CkptFullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "collation_list",
  /* ePragTyp:  */ PragTyp_COLLATION_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 32, 2,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_COMPILEOPTION_DIAGS)
 {/* zName:     */ "compile_options",
  /* ePragTyp:  */ PragTyp_COMPILE_OPTIONS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_DATA_VERSION },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "database_list",
  /* ePragTyp:  */ PragTyp_DATABASE_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 26, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "default_cache_size",
  /* ePragTyp:  */ PragTyp_DEFAULT_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "defer_foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_key_check",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 42, 4,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
 {/* zName:     */ "foreign_key_list",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 34, 8,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
................................................................................
  /* iArg:      */ SQLITE_FullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "function_list",
  /* ePragTyp:  */ PragTyp_FUNCTION_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 29, 2,
  /* iArg:      */ 0 },
#endif
#endif
#if defined(SQLITE_HAS_CODEC)
 {/* zName:     */ "hexkey",
  /* ePragTyp:  */ PragTyp_HEXKEY,
  /* ePragFlg:  */ 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "index_info",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 12, 3,
  /* iArg:      */ 0 },
 {/* zName:     */ "index_list",
  /* ePragTyp:  */ PragTyp_INDEX_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 21, 5,
  /* iArg:      */ 0 },
 {/* zName:     */ "index_xinfo",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 15, 6,
  /* iArg:      */ 1 },
#endif
................................................................................
 {/* zName:     */ "key",
  /* ePragTyp:  */ PragTyp_KEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)





 {/* zName:     */ "legacy_file_format",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_LegacyFileFmt },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_ENABLE_LOCKING_STYLE
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
 {/* zName:     */ "lock_status",
  /* ePragTyp:  */ PragTyp_LOCK_STATUS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 50, 2,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "locking_mode",
  /* ePragTyp:  */ PragTyp_LOCKING_MODE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
................................................................................
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if !defined(SQLITE_OMIT_VIRTUALTABLE)
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "module_list",
  /* ePragTyp:  */ PragTyp_MODULE_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 31, 1,
  /* iArg:      */ 0 },
#endif
#endif
#endif
 {/* zName:     */ "optimize",
  /* ePragTyp:  */ PragTyp_OPTIMIZE,
  /* ePragFlg:  */ PragFlg_Result1|PragFlg_NeedSchema,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "pragma_list",
  /* ePragTyp:  */ PragTyp_PRAGMA_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 31, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "query_only",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
................................................................................
  /* iArg:      */ SQLITE_SqlTrace },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)
 {/* zName:     */ "stats",
  /* ePragTyp:  */ PragTyp_STATS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 7, 5,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "synchronous",
  /* ePragTyp:  */ PragTyp_SYNCHRONOUS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "table_info",
  /* ePragTyp:  */ PragTyp_TABLE_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 1, 6,
  /* iArg:      */ 0 },





#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "temp_store",
  /* ePragTyp:  */ PragTyp_TEMP_STORE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ePragTyp:  */ PragTyp_WAL_AUTOCHECKPOINT,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "wal_checkpoint",
  /* ePragTyp:  */ PragTyp_WAL_CHECKPOINT,
  /* ePragFlg:  */ PragFlg_NeedSchema,
  /* ColNames:  */ 46, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema },
#endif
};
/* Number of pragmas: 60 on by default, 77 total. */

#define PragFlg_SchemaReq  0x80 /* Schema required - "main" is default */

/* Names of columns for pragmas that return multi-column result
** or that return single-column results where the name of the
** result column is different from the name of the pragma
*/
static const char *const pragCName[] = {
  /*   0 */ "id",          /* Used by: foreign_key_list */
  /*   1 */ "seq",        
  /*   2 */ "table",      
  /*   3 */ "from",       
  /*   4 */ "to",         
  /*   5 */ "on_update",  
  /*   6 */ "on_delete",  
  /*   7 */ "match",      
  /*   8 */ "cid",         /* Used by: table_xinfo */
  /*   9 */ "name",       
  /*  10 */ "type",       
  /*  11 */ "notnull",    
  /*  12 */ "dflt_value", 
  /*  13 */ "pk",         
  /*  14 */ "hidden",     
                           /* table_info reuses 8 */
  /*  15 */ "seqno",       /* Used by: index_xinfo */
  /*  16 */ "cid",        
  /*  17 */ "name",       
  /*  18 */ "desc",       
  /*  19 */ "coll",       
  /*  20 */ "key",        
  /*  21 */ "tbl",         /* Used by: stats */
  /*  22 */ "idx",        
  /*  23 */ "wdth",       
  /*  24 */ "hght",       
  /*  25 */ "flgs",       
  /*  26 */ "seq",         /* Used by: index_list */
  /*  27 */ "name",       
  /*  28 */ "unique",     
  /*  29 */ "origin",     
  /*  30 */ "partial",    
  /*  31 */ "table",       /* Used by: foreign_key_check */
  /*  32 */ "rowid",      
  /*  33 */ "parent",     
  /*  34 */ "fkid",       
                           /* index_info reuses 15 */
  /*  35 */ "seq",         /* Used by: database_list */
  /*  36 */ "name",       
  /*  37 */ "file",       

  /*  38 */ "busy",        /* Used by: wal_checkpoint */
  /*  39 */ "log",        
  /*  40 */ "checkpointed",

  /*  41 */ "name",        /* Used by: function_list */
  /*  42 */ "builtin",    
                           /* collation_list reuses 26 */
  /*  43 */ "database",    /* Used by: lock_status */
  /*  44 */ "status",     


  /*  45 */ "cache_size",  /* Used by: default_cache_size */
                           /* module_list pragma_list reuses 9 */
  /*  46 */ "timeout",     /* Used by: busy_timeout */


};

/* Definitions of all built-in pragmas */
typedef struct PragmaName {
  const char *const zName; /* Name of pragma */
  u8 ePragTyp;             /* PragTyp_XXX value */
  u8 mPragFlg;             /* Zero or more PragFlg_XXX values */
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_AutoIndex },
#endif
#endif
 {/* zName:     */ "busy_timeout",
  /* ePragTyp:  */ PragTyp_BUSY_TIMEOUT,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 46, 1,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "cache_size",
  /* ePragTyp:  */ PragTyp_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_CkptFullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "collation_list",
  /* ePragTyp:  */ PragTyp_COLLATION_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 26, 2,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_COMPILEOPTION_DIAGS)
 {/* zName:     */ "compile_options",
  /* ePragTyp:  */ PragTyp_COMPILE_OPTIONS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_DATA_VERSION },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "database_list",
  /* ePragTyp:  */ PragTyp_DATABASE_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 35, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "default_cache_size",
  /* ePragTyp:  */ PragTyp_DEFAULT_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 45, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "defer_foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_key_check",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 31, 4,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
 {/* zName:     */ "foreign_key_list",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 0, 8,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
................................................................................
  /* iArg:      */ SQLITE_FullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "function_list",
  /* ePragTyp:  */ PragTyp_FUNCTION_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 41, 2,
  /* iArg:      */ 0 },
#endif
#endif
#if defined(SQLITE_HAS_CODEC)
 {/* zName:     */ "hexkey",
  /* ePragTyp:  */ PragTyp_HEXKEY,
  /* ePragFlg:  */ 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "index_info",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 15, 3,
  /* iArg:      */ 0 },
 {/* zName:     */ "index_list",
  /* ePragTyp:  */ PragTyp_INDEX_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 26, 5,
  /* iArg:      */ 0 },
 {/* zName:     */ "index_xinfo",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 15, 6,
  /* iArg:      */ 1 },
#endif
................................................................................
 {/* zName:     */ "key",
  /* ePragTyp:  */ PragTyp_KEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "legacy_alter_table",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_LegacyAlter },
 {/* zName:     */ "legacy_file_format",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_LegacyFileFmt },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_ENABLE_LOCKING_STYLE
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
 {/* zName:     */ "lock_status",
  /* ePragTyp:  */ PragTyp_LOCK_STATUS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 43, 2,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "locking_mode",
  /* ePragTyp:  */ PragTyp_LOCKING_MODE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
................................................................................
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if !defined(SQLITE_OMIT_VIRTUALTABLE)
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "module_list",
  /* ePragTyp:  */ PragTyp_MODULE_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 9, 1,
  /* iArg:      */ 0 },
#endif
#endif
#endif
 {/* zName:     */ "optimize",
  /* ePragTyp:  */ PragTyp_OPTIMIZE,
  /* ePragFlg:  */ PragFlg_Result1|PragFlg_NeedSchema,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "pragma_list",
  /* ePragTyp:  */ PragTyp_PRAGMA_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 9, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "query_only",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
................................................................................
  /* iArg:      */ SQLITE_SqlTrace },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)
 {/* zName:     */ "stats",
  /* ePragTyp:  */ PragTyp_STATS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 21, 5,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "synchronous",
  /* ePragTyp:  */ PragTyp_SYNCHRONOUS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "table_info",
  /* ePragTyp:  */ PragTyp_TABLE_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 8, 6,
  /* iArg:      */ 0 },
 {/* zName:     */ "table_xinfo",
  /* ePragTyp:  */ PragTyp_TABLE_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 8, 7,
  /* iArg:      */ 1 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "temp_store",
  /* ePragTyp:  */ PragTyp_TEMP_STORE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ePragTyp:  */ PragTyp_WAL_AUTOCHECKPOINT,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "wal_checkpoint",
  /* ePragTyp:  */ PragTyp_WAL_CHECKPOINT,
  /* ePragFlg:  */ PragFlg_NeedSchema,
  /* ColNames:  */ 38, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema },
#endif
};
/* Number of pragmas: 62 on by default, 79 total. */

** expression node refer back to that source column.  The following changes
** are made to pExpr:
**
**    pExpr->iDb           Set the index in db->aDb[] of the database X
**                         (even if X is implied).
**    pExpr->iTable        Set to the cursor number for the table obtained
**                         from pSrcList.
**    pExpr->pTab          Points to the Table structure of X.Y (even if
**                         X and/or Y are implied.)
**    pExpr->iColumn       Set to the column number within the table.
**    pExpr->op            Set to TK_COLUMN.
**    pExpr->pLeft         Any expression this points to is deleted
**    pExpr->pRight        Any expression this points to is deleted.
**
** The zDb variable is the name of the database (the "X").  This value may be
................................................................................

  assert( pNC );     /* the name context cannot be NULL. */
  assert( zCol );    /* The Z in X.Y.Z cannot be NULL */
  assert( !ExprHasProperty(pExpr, EP_TokenOnly|EP_Reduced) );

  /* Initialize the node to no-match */
  pExpr->iTable = -1;
  pExpr->pTab = 0;
  ExprSetVVAProperty(pExpr, EP_NoReduce);

  /* Translate the schema name in zDb into a pointer to the corresponding
  ** schema.  If not found, pSchema will remain NULL and nothing will match
  ** resulting in an appropriate error message toward the end of this routine
  */
  if( zDb ){
................................................................................
        if( zTab ){
          const char *zTabName = pItem->zAlias ? pItem->zAlias : pTab->zName;
          assert( zTabName!=0 );
          if( sqlite3StrICmp(zTabName, zTab)!=0 ){
            continue;
          }
          if( IN_RENAME_OBJECT && pItem->zAlias ){
            sqlite3RenameTokenRemap(pParse, 0, (void*)&pExpr->pTab);
          }
        }
        if( 0==(cntTab++) ){
          pMatch = pItem;
        }
        for(j=0, pCol=pTab->aCol; j<pTab->nCol; j++, pCol++){
          if( sqlite3StrICmp(pCol->zName, zCol)==0 ){
................................................................................
            pExpr->iColumn = j==pTab->iPKey ? -1 : (i16)j;
            break;
          }
        }
      }
      if( pMatch ){
        pExpr->iTable = pMatch->iCursor;
        pExpr->pTab = pMatch->pTab;
        /* RIGHT JOIN not (yet) supported */
        assert( (pMatch->fg.jointype & JT_RIGHT)==0 );
        if( (pMatch->fg.jointype & JT_LEFT)!=0 ){
          ExprSetProperty(pExpr, EP_CanBeNull);
        }
        pSchema = pExpr->pTab->pSchema;
      }
    } /* if( pSrcList ) */

#if !defined(SQLITE_OMIT_TRIGGER) || !defined(SQLITE_OMIT_UPSERT)
    /* If we have not already resolved the name, then maybe 
    ** it is a new.* or old.* trigger argument reference.  Or
    ** maybe it is an excluded.* from an upsert.
................................................................................
        if( iCol<pTab->nCol ){
          cnt++;
#ifndef SQLITE_OMIT_UPSERT
          if( pExpr->iTable==2 ){
            testcase( iCol==(-1) );
            if( IN_RENAME_OBJECT ){
              pExpr->iColumn = iCol;
              pExpr->pTab = pTab;
              eNewExprOp = TK_COLUMN;
            }else{
              pExpr->iTable = pNC->uNC.pUpsert->regData + iCol;
              eNewExprOp = TK_REGISTER;
              ExprSetProperty(pExpr, EP_Alias);
            }
          }else
................................................................................
              testcase( iCol==32 );
              pParse->oldmask |= (iCol>=32 ? 0xffffffff : (((u32)1)<<iCol));
            }else{
              testcase( iCol==31 );
              testcase( iCol==32 );
              pParse->newmask |= (iCol>=32 ? 0xffffffff : (((u32)1)<<iCol));
            }
            pExpr->pTab = pTab;
            pExpr->iColumn = (i16)iCol;
            eNewExprOp = TK_TRIGGER;
#endif /* SQLITE_OMIT_TRIGGER */
          }
        }
      }
    }
................................................................................
  ** Because no reference was made to outer contexts, the pNC->nRef
  ** fields are not changed in any context.
  */
  if( cnt==0 && zTab==0 ){
    assert( pExpr->op==TK_ID );
    if( ExprHasProperty(pExpr,EP_DblQuoted) ){
      pExpr->op = TK_STRING;
      pExpr->pTab = 0;
      return WRC_Prune;
    }
    if( sqlite3ExprIdToTrueFalse(pExpr) ){
      return WRC_Prune;
    }
  }

................................................................................
** Allocate and return a pointer to an expression to load the column iCol
** from datasource iSrc in SrcList pSrc.
*/
Expr *sqlite3CreateColumnExpr(sqlite3 *db, SrcList *pSrc, int iSrc, int iCol){
  Expr *p = sqlite3ExprAlloc(db, TK_COLUMN, 0, 0);
  if( p ){
    struct SrcList_item *pItem = &pSrc->a[iSrc];
    p->pTab = pItem->pTab;
    p->iTable = pItem->iCursor;
    if( p->pTab->iPKey==iCol ){
      p->iColumn = -1;
    }else{
      p->iColumn = (ynVar)iCol;
      testcase( iCol==BMS );
      testcase( iCol==BMS-1 );
      pItem->colUsed |= ((Bitmask)1)<<(iCol>=BMS ? BMS-1 : iCol);
    }
................................................................................
    case TK_ROW: {
      SrcList *pSrcList = pNC->pSrcList;
      struct SrcList_item *pItem;
      assert( pSrcList && pSrcList->nSrc==1 );
      pItem = pSrcList->a;
      assert( HasRowid(pItem->pTab) && pItem->pTab->pSelect==0 );
      pExpr->op = TK_COLUMN;
      pExpr->pTab = pItem->pTab;
      pExpr->iTable = pItem->iCursor;
      pExpr->iColumn = -1;
      pExpr->affinity = SQLITE_AFF_INTEGER;
      break;
    }
#endif /* defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT)
          && !defined(SQLITE_OMIT_SUBQUERY) */
................................................................................
          pLeft = pRight->pLeft;
          pRight = pRight->pRight;
        }
        zTable = pLeft->u.zToken;
        zColumn = pRight->u.zToken;
        if( IN_RENAME_OBJECT ){
          sqlite3RenameTokenRemap(pParse, (void*)pExpr, (void*)pRight);
        }
        if( IN_RENAME_OBJECT ){
          sqlite3RenameTokenRemap(pParse, (void*)&pExpr->pTab, (void*)pLeft);
        }
      }
      return lookupName(pParse, zDb, zTable, zColumn, pNC, pExpr);
    }

    /* Resolve function names
    */
................................................................................

      if( 0==IN_RENAME_OBJECT ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        assert( is_agg==0 || (pDef->funcFlags & SQLITE_FUNC_MINMAX)
          || (pDef->xValue==0 && pDef->xInverse==0)
          || (pDef->xValue && pDef->xInverse && pDef->xSFunc && pDef->xFinalize)
        );
        if( pDef && pDef->xValue==0 && pExpr->pWin ){
          sqlite3ErrorMsg(pParse, 
              "%.*s() may not be used as a window function", nId, zId
          );
          pNC->nErr++;
        }else if( 
              (is_agg && (pNC->ncFlags & NC_AllowAgg)==0)
           || (is_agg && (pDef->funcFlags & SQLITE_FUNC_WINDOW) && !pExpr->pWin)
           || (is_agg && pExpr->pWin && (pNC->ncFlags & NC_AllowWin)==0)
        ){
          const char *zType;
          if( (pDef->funcFlags & SQLITE_FUNC_WINDOW) || pExpr->pWin ){
            zType = "window";
          }else{
            zType = "aggregate";
          }
          sqlite3ErrorMsg(pParse, "misuse of %s function %.*s()",zType,nId,zId);
          pNC->nErr++;
          is_agg = 0;
................................................................................
        }else if( wrong_num_args ){
          sqlite3ErrorMsg(pParse,"wrong number of arguments to function %.*s()",
               nId, zId);
          pNC->nErr++;
        }
        if( is_agg ){
#ifndef SQLITE_OMIT_WINDOWFUNC
          pNC->ncFlags &= ~(pExpr->pWin ? NC_AllowWin : NC_AllowAgg);
#else
          pNC->ncFlags &= ~NC_AllowAgg;
#endif
        }
      }
      sqlite3WalkExprList(pWalker, pList);
      if( is_agg ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        if( pExpr->pWin ){
          Select *pSel = pNC->pWinSelect;
          sqlite3WalkExprList(pWalker, pExpr->pWin->pPartition);
          sqlite3WalkExprList(pWalker, pExpr->pWin->pOrderBy);
          sqlite3WalkExpr(pWalker, pExpr->pWin->pFilter);
          sqlite3WindowUpdate(pParse, pSel->pWinDefn, pExpr->pWin, pDef);
          if( 0==pSel->pWin 
           || 0==sqlite3WindowCompare(pParse, pSel->pWin, pExpr->pWin) 
          ){
            pExpr->pWin->pNextWin = pSel->pWin;
            pSel->pWin = pExpr->pWin;
          }
          pNC->ncFlags |= NC_AllowWin;
        }else
#endif /* SQLITE_OMIT_WINDOWFUNC */
        {
          NameContext *pNC2 = pNC;
          pExpr->op = TK_AGG_FUNCTION;
................................................................................
    pItem->u.x.iOrderByCol = 0;
    if( sqlite3ResolveExprNames(pNC, pE) ){
      return 1;
    }
    for(j=0; j<pSelect->pEList->nExpr; j++){
      if( sqlite3ExprCompare(0, pE, pSelect->pEList->a[j].pExpr, -1)==0 ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        if( pE->pWin ){
          /* Since this window function is being changed into a reference
          ** to the same window function the result set, remove the instance
          ** of this window function from the Select.pWin list. */
          Window **pp;
          for(pp=&pSelect->pWin; *pp; pp=&(*pp)->pNextWin){
            if( *pp==pE->pWin ){
              *pp = (*pp)->pNextWin;
            }    
          }
        }
#endif
        pItem->u.x.iOrderByCol = j+1;
      }

** expression node refer back to that source column.  The following changes
** are made to pExpr:
**
**    pExpr->iDb           Set the index in db->aDb[] of the database X
**                         (even if X is implied).
**    pExpr->iTable        Set to the cursor number for the table obtained
**                         from pSrcList.
**    pExpr->y.pTab        Points to the Table structure of X.Y (even if
**                         X and/or Y are implied.)
**    pExpr->iColumn       Set to the column number within the table.
**    pExpr->op            Set to TK_COLUMN.
**    pExpr->pLeft         Any expression this points to is deleted
**    pExpr->pRight        Any expression this points to is deleted.
**
** The zDb variable is the name of the database (the "X").  This value may be
................................................................................

  assert( pNC );     /* the name context cannot be NULL. */
  assert( zCol );    /* The Z in X.Y.Z cannot be NULL */
  assert( !ExprHasProperty(pExpr, EP_TokenOnly|EP_Reduced) );

  /* Initialize the node to no-match */
  pExpr->iTable = -1;

  ExprSetVVAProperty(pExpr, EP_NoReduce);

  /* Translate the schema name in zDb into a pointer to the corresponding
  ** schema.  If not found, pSchema will remain NULL and nothing will match
  ** resulting in an appropriate error message toward the end of this routine
  */
  if( zDb ){
................................................................................
        if( zTab ){
          const char *zTabName = pItem->zAlias ? pItem->zAlias : pTab->zName;
          assert( zTabName!=0 );
          if( sqlite3StrICmp(zTabName, zTab)!=0 ){
            continue;
          }
          if( IN_RENAME_OBJECT && pItem->zAlias ){
            sqlite3RenameTokenRemap(pParse, 0, (void*)&pExpr->y.pTab);
          }
        }
        if( 0==(cntTab++) ){
          pMatch = pItem;
        }
        for(j=0, pCol=pTab->aCol; j<pTab->nCol; j++, pCol++){
          if( sqlite3StrICmp(pCol->zName, zCol)==0 ){
................................................................................
            pExpr->iColumn = j==pTab->iPKey ? -1 : (i16)j;
            break;
          }
        }
      }
      if( pMatch ){
        pExpr->iTable = pMatch->iCursor;
        pExpr->y.pTab = pMatch->pTab;
        /* RIGHT JOIN not (yet) supported */
        assert( (pMatch->fg.jointype & JT_RIGHT)==0 );
        if( (pMatch->fg.jointype & JT_LEFT)!=0 ){
          ExprSetProperty(pExpr, EP_CanBeNull);
        }
        pSchema = pExpr->y.pTab->pSchema;
      }
    } /* if( pSrcList ) */

#if !defined(SQLITE_OMIT_TRIGGER) || !defined(SQLITE_OMIT_UPSERT)
    /* If we have not already resolved the name, then maybe 
    ** it is a new.* or old.* trigger argument reference.  Or
    ** maybe it is an excluded.* from an upsert.
................................................................................
        if( iCol<pTab->nCol ){
          cnt++;
#ifndef SQLITE_OMIT_UPSERT
          if( pExpr->iTable==2 ){
            testcase( iCol==(-1) );
            if( IN_RENAME_OBJECT ){
              pExpr->iColumn = iCol;
              pExpr->y.pTab = pTab;
              eNewExprOp = TK_COLUMN;
            }else{
              pExpr->iTable = pNC->uNC.pUpsert->regData + iCol;
              eNewExprOp = TK_REGISTER;
              ExprSetProperty(pExpr, EP_Alias);
            }
          }else
................................................................................
              testcase( iCol==32 );
              pParse->oldmask |= (iCol>=32 ? 0xffffffff : (((u32)1)<<iCol));
            }else{
              testcase( iCol==31 );
              testcase( iCol==32 );
              pParse->newmask |= (iCol>=32 ? 0xffffffff : (((u32)1)<<iCol));
            }
            pExpr->y.pTab = pTab;
            pExpr->iColumn = (i16)iCol;
            eNewExprOp = TK_TRIGGER;
#endif /* SQLITE_OMIT_TRIGGER */
          }
        }
      }
    }
................................................................................
  ** Because no reference was made to outer contexts, the pNC->nRef
  ** fields are not changed in any context.
  */
  if( cnt==0 && zTab==0 ){
    assert( pExpr->op==TK_ID );
    if( ExprHasProperty(pExpr,EP_DblQuoted) ){
      pExpr->op = TK_STRING;
      pExpr->y.pTab = 0;
      return WRC_Prune;
    }
    if( sqlite3ExprIdToTrueFalse(pExpr) ){
      return WRC_Prune;
    }
  }

................................................................................
** Allocate and return a pointer to an expression to load the column iCol
** from datasource iSrc in SrcList pSrc.
*/
Expr *sqlite3CreateColumnExpr(sqlite3 *db, SrcList *pSrc, int iSrc, int iCol){
  Expr *p = sqlite3ExprAlloc(db, TK_COLUMN, 0, 0);
  if( p ){
    struct SrcList_item *pItem = &pSrc->a[iSrc];
    p->y.pTab = pItem->pTab;
    p->iTable = pItem->iCursor;
    if( p->y.pTab->iPKey==iCol ){
      p->iColumn = -1;
    }else{
      p->iColumn = (ynVar)iCol;
      testcase( iCol==BMS );
      testcase( iCol==BMS-1 );
      pItem->colUsed |= ((Bitmask)1)<<(iCol>=BMS ? BMS-1 : iCol);
    }
................................................................................
    case TK_ROW: {
      SrcList *pSrcList = pNC->pSrcList;
      struct SrcList_item *pItem;
      assert( pSrcList && pSrcList->nSrc==1 );
      pItem = pSrcList->a;
      assert( HasRowid(pItem->pTab) && pItem->pTab->pSelect==0 );
      pExpr->op = TK_COLUMN;
      pExpr->y.pTab = pItem->pTab;
      pExpr->iTable = pItem->iCursor;
      pExpr->iColumn = -1;
      pExpr->affinity = SQLITE_AFF_INTEGER;
      break;
    }
#endif /* defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT)
          && !defined(SQLITE_OMIT_SUBQUERY) */
................................................................................
          pLeft = pRight->pLeft;
          pRight = pRight->pRight;
        }
        zTable = pLeft->u.zToken;
        zColumn = pRight->u.zToken;
        if( IN_RENAME_OBJECT ){
          sqlite3RenameTokenRemap(pParse, (void*)pExpr, (void*)pRight);


          sqlite3RenameTokenRemap(pParse, (void*)&pExpr->y.pTab, (void*)pLeft);
        }
      }
      return lookupName(pParse, zDb, zTable, zColumn, pNC, pExpr);
    }

    /* Resolve function names
    */
................................................................................

      if( 0==IN_RENAME_OBJECT ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        assert( is_agg==0 || (pDef->funcFlags & SQLITE_FUNC_MINMAX)
          || (pDef->xValue==0 && pDef->xInverse==0)
          || (pDef->xValue && pDef->xInverse && pDef->xSFunc && pDef->xFinalize)
        );
        if( pDef && pDef->xValue==0 && ExprHasProperty(pExpr, EP_WinFunc) ){
          sqlite3ErrorMsg(pParse, 
              "%.*s() may not be used as a window function", nId, zId
          );
          pNC->nErr++;
        }else if( 
              (is_agg && (pNC->ncFlags & NC_AllowAgg)==0)
           || (is_agg && (pDef->funcFlags&SQLITE_FUNC_WINDOW) && !pExpr->y.pWin)
           || (is_agg && pExpr->y.pWin && (pNC->ncFlags & NC_AllowWin)==0)
        ){
          const char *zType;
          if( (pDef->funcFlags & SQLITE_FUNC_WINDOW) || pExpr->y.pWin ){
            zType = "window";
          }else{
            zType = "aggregate";
          }
          sqlite3ErrorMsg(pParse, "misuse of %s function %.*s()",zType,nId,zId);
          pNC->nErr++;
          is_agg = 0;
................................................................................
        }else if( wrong_num_args ){
          sqlite3ErrorMsg(pParse,"wrong number of arguments to function %.*s()",
               nId, zId);
          pNC->nErr++;
        }
        if( is_agg ){
#ifndef SQLITE_OMIT_WINDOWFUNC
          pNC->ncFlags &= ~(pExpr->y.pWin ? NC_AllowWin : NC_AllowAgg);
#else
          pNC->ncFlags &= ~NC_AllowAgg;
#endif
        }
      }
      sqlite3WalkExprList(pWalker, pList);
      if( is_agg ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        if( pExpr->y.pWin ){
          Select *pSel = pNC->pWinSelect;
          sqlite3WalkExprList(pWalker, pExpr->y.pWin->pPartition);
          sqlite3WalkExprList(pWalker, pExpr->y.pWin->pOrderBy);
          sqlite3WalkExpr(pWalker, pExpr->y.pWin->pFilter);
          sqlite3WindowUpdate(pParse, pSel->pWinDefn, pExpr->y.pWin, pDef);
          if( 0==pSel->pWin 
           || 0==sqlite3WindowCompare(pParse, pSel->pWin, pExpr->y.pWin) 
          ){
            pExpr->y.pWin->pNextWin = pSel->pWin;
            pSel->pWin = pExpr->y.pWin;
          }
          pNC->ncFlags |= NC_AllowWin;
        }else
#endif /* SQLITE_OMIT_WINDOWFUNC */
        {
          NameContext *pNC2 = pNC;
          pExpr->op = TK_AGG_FUNCTION;
................................................................................
    pItem->u.x.iOrderByCol = 0;
    if( sqlite3ResolveExprNames(pNC, pE) ){
      return 1;
    }
    for(j=0; j<pSelect->pEList->nExpr; j++){
      if( sqlite3ExprCompare(0, pE, pSelect->pEList->a[j].pExpr, -1)==0 ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        if( ExprHasProperty(pE, EP_WinFunc) ){
          /* Since this window function is being changed into a reference
          ** to the same window function the result set, remove the instance
          ** of this window function from the Select.pWin list. */
          Window **pp;
          for(pp=&pSelect->pWin; *pp; pp=&(*pp)->pNextWin){
            if( *pp==pE->y.pWin ){
              *pp = (*pp)->pNextWin;
            }    
          }
        }
#endif
        pItem->u.x.iOrderByCol = j+1;
      }

  int i;
  int nDefer = 0;
  ExprList *pExtra = 0;
  for(i=0; i<pEList->nExpr; i++){
    struct ExprList_item *pItem = &pEList->a[i];
    if( pItem->u.x.iOrderByCol==0 ){
      Expr *pExpr = pItem->pExpr;
      Table *pTab = pExpr->pTab;
      if( pExpr->op==TK_COLUMN && pExpr->iColumn>=0 && pTab && !IsVirtual(pTab)
       && (pTab->aCol[pExpr->iColumn].colFlags & COLFLAG_SORTERREF)
      ){
        int j;
        for(j=0; j<nDefer; j++){
          if( pSort->aDefer[j].iCsr==pExpr->iTable ) break;
        }
................................................................................
              pPk = sqlite3PrimaryKeyIndex(pTab);
              nKey = pPk->nKeyCol;
            }
            for(k=0; k<nKey; k++){
              Expr *pNew = sqlite3PExpr(pParse, TK_COLUMN, 0, 0);
              if( pNew ){
                pNew->iTable = pExpr->iTable;
                pNew->pTab = pExpr->pTab;
                pNew->iColumn = pPk ? pPk->aiColumn[k] : -1;
                pExtra = sqlite3ExprListAppend(pParse, pExtra, pNew);
              }
            }
            pSort->aDefer[nDefer].pTab = pExpr->pTab;
            pSort->aDefer[nDefer].iCsr = pExpr->iTable;
            pSort->aDefer[nDefer].nKey = nKey;
            nDefer++;
          }
        }
        pItem->bSorterRef = 1;
      }
................................................................................
        ** This is not a problem, as the column type of "t1.col" is never
        ** used. When columnType() is called on the expression 
        ** "(SELECT t1.col)", the correct type is returned (see the TK_SELECT
        ** branch below.  */
        break;
      }

      assert( pTab && pExpr->pTab==pTab );
      if( pS ){
        /* The "table" is actually a sub-select or a view in the FROM clause
        ** of the SELECT statement. Return the declaration type and origin
        ** data for the result-set column of the sub-select.
        */
        if( iCol>=0 && iCol<pS->pEList->nExpr ){
          /* If iCol is less than zero, then the expression requests the
................................................................................
  srcName = (db->flags & SQLITE_ShortColNames)!=0 || fullName;
  sqlite3VdbeSetNumCols(v, pEList->nExpr);
  for(i=0; i<pEList->nExpr; i++){
    Expr *p = pEList->a[i].pExpr;

    assert( p!=0 );
    assert( p->op!=TK_AGG_COLUMN );  /* Agg processing has not run yet */
    assert( p->op!=TK_COLUMN || p->pTab!=0 ); /* Covering idx not yet coded */
    if( pEList->a[i].zName ){
      /* An AS clause always takes first priority */
      char *zName = pEList->a[i].zName;
      sqlite3VdbeSetColName(v, i, COLNAME_NAME, zName, SQLITE_TRANSIENT);
    }else if( srcName && p->op==TK_COLUMN ){
      char *zCol;
      int iCol = p->iColumn;
      pTab = p->pTab;
      assert( pTab!=0 );
      if( iCol<0 ) iCol = pTab->iPKey;
      assert( iCol==-1 || (iCol>=0 && iCol<pTab->nCol) );
      if( iCol<0 ){
        zCol = "rowid";
      }else{
        zCol = pTab->aCol[iCol].zName;
................................................................................
        pColExpr = pColExpr->pRight;
        assert( pColExpr!=0 );
      }
      assert( pColExpr->op!=TK_AGG_COLUMN );
      if( pColExpr->op==TK_COLUMN ){
        /* For columns use the column name name */
        int iCol = pColExpr->iColumn;
        Table *pTab = pColExpr->pTab;
        assert( pTab!=0 );
        if( iCol<0 ) iCol = pTab->iPKey;
        zName = iCol>=0 ? pTab->aCol[iCol].zName : "rowid";
      }else if( pColExpr->op==TK_ID ){
        assert( !ExprHasProperty(pColExpr, EP_IntValue) );
        zName = pColExpr->u.zToken;
      }else{
................................................................................
  int eDest = SRT_Fifo;         /* How to write to Queue */
  SelectDest destQueue;         /* SelectDest targetting the Queue table */
  int i;                        /* Loop counter */
  int rc;                       /* Result code */
  ExprList *pOrderBy;           /* The ORDER BY clause */
  Expr *pLimit;                 /* Saved LIMIT and OFFSET */
  int regLimit, regOffset;      /* Registers used by LIMIT and OFFSET */








  /* Obtain authorization to do a recursive query */
  if( sqlite3AuthCheck(pParse, SQLITE_RECURSIVE, 0, 0, 0) ) return;

  /* Process the LIMIT and OFFSET clauses, if they exist */
  addrBreak = sqlite3VdbeMakeLabel(v);
  p->nSelectRow = 320;  /* 4 billion rows */
................................................................................
      int regGosub = ++pParse->nMem;

      sqlite3WindowCodeStep(pParse, p, pWInfo, regGosub, addrGosub);

      sqlite3VdbeAddOp2(v, OP_Goto, 0, iBreak);
      sqlite3VdbeResolveLabel(v, addrGosub);
      VdbeNoopComment((v, "inner-loop subroutine"));

      selectInnerLoop(pParse, p, -1, &sSort, &sDistinct, pDest, iCont, iBreak);
      sqlite3VdbeResolveLabel(v, iCont);
      sqlite3VdbeAddOp1(v, OP_Return, regGosub);
      VdbeComment((v, "end inner-loop subroutine"));
      sqlite3VdbeResolveLabel(v, iBreak);
    }else
#endif /* SQLITE_OMIT_WINDOWFUNC */

  int i;
  int nDefer = 0;
  ExprList *pExtra = 0;
  for(i=0; i<pEList->nExpr; i++){
    struct ExprList_item *pItem = &pEList->a[i];
    if( pItem->u.x.iOrderByCol==0 ){
      Expr *pExpr = pItem->pExpr;
      Table *pTab = pExpr->y.pTab;
      if( pExpr->op==TK_COLUMN && pExpr->iColumn>=0 && pTab && !IsVirtual(pTab)
       && (pTab->aCol[pExpr->iColumn].colFlags & COLFLAG_SORTERREF)
      ){
        int j;
        for(j=0; j<nDefer; j++){
          if( pSort->aDefer[j].iCsr==pExpr->iTable ) break;
        }
................................................................................
              pPk = sqlite3PrimaryKeyIndex(pTab);
              nKey = pPk->nKeyCol;
            }
            for(k=0; k<nKey; k++){
              Expr *pNew = sqlite3PExpr(pParse, TK_COLUMN, 0, 0);
              if( pNew ){
                pNew->iTable = pExpr->iTable;
                pNew->y.pTab = pExpr->y.pTab;
                pNew->iColumn = pPk ? pPk->aiColumn[k] : -1;
                pExtra = sqlite3ExprListAppend(pParse, pExtra, pNew);
              }
            }
            pSort->aDefer[nDefer].pTab = pExpr->y.pTab;
            pSort->aDefer[nDefer].iCsr = pExpr->iTable;
            pSort->aDefer[nDefer].nKey = nKey;
            nDefer++;
          }
        }
        pItem->bSorterRef = 1;
      }
................................................................................
        ** This is not a problem, as the column type of "t1.col" is never
        ** used. When columnType() is called on the expression 
        ** "(SELECT t1.col)", the correct type is returned (see the TK_SELECT
        ** branch below.  */
        break;
      }

      assert( pTab && pExpr->y.pTab==pTab );
      if( pS ){
        /* The "table" is actually a sub-select or a view in the FROM clause
        ** of the SELECT statement. Return the declaration type and origin
        ** data for the result-set column of the sub-select.
        */
        if( iCol>=0 && iCol<pS->pEList->nExpr ){
          /* If iCol is less than zero, then the expression requests the
................................................................................
  srcName = (db->flags & SQLITE_ShortColNames)!=0 || fullName;
  sqlite3VdbeSetNumCols(v, pEList->nExpr);
  for(i=0; i<pEList->nExpr; i++){
    Expr *p = pEList->a[i].pExpr;

    assert( p!=0 );
    assert( p->op!=TK_AGG_COLUMN );  /* Agg processing has not run yet */
    assert( p->op!=TK_COLUMN || p->y.pTab!=0 ); /* Covering idx not yet coded */
    if( pEList->a[i].zName ){
      /* An AS clause always takes first priority */
      char *zName = pEList->a[i].zName;
      sqlite3VdbeSetColName(v, i, COLNAME_NAME, zName, SQLITE_TRANSIENT);
    }else if( srcName && p->op==TK_COLUMN ){
      char *zCol;
      int iCol = p->iColumn;
      pTab = p->y.pTab;
      assert( pTab!=0 );
      if( iCol<0 ) iCol = pTab->iPKey;
      assert( iCol==-1 || (iCol>=0 && iCol<pTab->nCol) );
      if( iCol<0 ){
        zCol = "rowid";
      }else{
        zCol = pTab->aCol[iCol].zName;
................................................................................
        pColExpr = pColExpr->pRight;
        assert( pColExpr!=0 );
      }
      assert( pColExpr->op!=TK_AGG_COLUMN );
      if( pColExpr->op==TK_COLUMN ){
        /* For columns use the column name name */
        int iCol = pColExpr->iColumn;
        Table *pTab = pColExpr->y.pTab;
        assert( pTab!=0 );
        if( iCol<0 ) iCol = pTab->iPKey;
        zName = iCol>=0 ? pTab->aCol[iCol].zName : "rowid";
      }else if( pColExpr->op==TK_ID ){
        assert( !ExprHasProperty(pColExpr, EP_IntValue) );
        zName = pColExpr->u.zToken;
      }else{
................................................................................
  int eDest = SRT_Fifo;         /* How to write to Queue */
  SelectDest destQueue;         /* SelectDest targetting the Queue table */
  int i;                        /* Loop counter */
  int rc;                       /* Result code */
  ExprList *pOrderBy;           /* The ORDER BY clause */
  Expr *pLimit;                 /* Saved LIMIT and OFFSET */
  int regLimit, regOffset;      /* Registers used by LIMIT and OFFSET */

#ifndef SQLITE_OMIT_WINDOWFUNC
  if( p->pWin ){
    sqlite3ErrorMsg(pParse, "cannot use window functions in recursive queries");
    return;
  }
#endif

  /* Obtain authorization to do a recursive query */
  if( sqlite3AuthCheck(pParse, SQLITE_RECURSIVE, 0, 0, 0) ) return;

  /* Process the LIMIT and OFFSET clauses, if they exist */
  addrBreak = sqlite3VdbeMakeLabel(v);
  p->nSelectRow = 320;  /* 4 billion rows */
................................................................................
      int regGosub = ++pParse->nMem;

      sqlite3WindowCodeStep(pParse, p, pWInfo, regGosub, addrGosub);

      sqlite3VdbeAddOp2(v, OP_Goto, 0, iBreak);
      sqlite3VdbeResolveLabel(v, addrGosub);
      VdbeNoopComment((v, "inner-loop subroutine"));
      sSort.labelOBLopt = 0;
      selectInnerLoop(pParse, p, -1, &sSort, &sDistinct, pDest, iCont, iBreak);
      sqlite3VdbeResolveLabel(v, iCont);
      sqlite3VdbeAddOp1(v, OP_Return, regGosub);
      VdbeComment((v, "end inner-loop subroutine"));
      sqlite3VdbeResolveLabel(v, iBreak);
    }else
#endif /* SQLITE_OMIT_WINDOWFUNC */

  if( x!=sz ){
    sqlite3_result_error(context, "could not read back the whole file", -1);
    goto edit_func_end;
  }
  if( bBin ){
    sqlite3_result_blob64(context, p, sz, sqlite3_free);
  }else{
    int i, j;
    if( hasCRNL ){
      /* If the original contains \r\n then do no conversions back to \n */
      j = sz;
    }else{
      /* If the file did not originally contain \r\n then convert any new
      ** \r\n back into \n */
      for(i=j=0; i<sz; i++){
................................................................................
    sqlite3_free(zErr);
    free(zQ2);
  }
  return rc;
}

/*
** Text of a help message






*/
static char zHelp[] =

#if defined(SQLITE_HAVE_ZLIB) && !defined(SQLITE_OMIT_VIRTUALTABLE)
  ".archive ...           Manage SQL archives: \".archive --help\" for details\n"

















#endif
#ifndef SQLITE_OMIT_AUTHORIZATION
  ".auth ON|OFF           Show authorizer callbacks\n"
#endif
  ".backup ?DB? FILE      Backup DB (default \"main\") to FILE\n"
  "                         Add \"--append\" to open using appendvfs.\n"

  ".bail on|off           Stop after hitting an error.  Default OFF\n"
  ".binary on|off         Turn binary output on or off.  Default OFF\n"
  ".cd DIRECTORY          Change the working directory to DIRECTORY\n"
  ".changes on|off        Show number of rows changed by SQL\n"
  ".check GLOB            Fail if output since .testcase does not match\n"
  ".clone NEWDB           Clone data into NEWDB from the existing database\n"
  ".databases             List names and files of attached databases\n"
  ".dbconfig ?op? ?val?   List or change sqlite3_db_config() options\n"
  ".dbinfo ?DB?           Show status information about the database\n"
  ".dump ?TABLE? ...      Dump the database in an SQL text format\n"
  "                         If TABLE specified, only dump tables matching\n"
  "                         LIKE pattern TABLE.\n"




  ".echo on|off           Turn command echo on or off\n"
  ".eqp on|off|full       Enable or disable automatic EXPLAIN QUERY PLAN\n"
  ".excel                 Display the output of next command in a spreadsheet\n"
  ".exit                  Exit this program\n"

  ".expert                EXPERIMENTAL. Suggest indexes for specified queries\n"
/* Because explain mode comes on automatically now, the ".explain" mode
** is removed from the help screen.  It is still supported for legacy, however */
/*".explain ?on|off|auto? Turn EXPLAIN output mode on or off or to automatic\n"*/
  ".fullschema ?--indent? Show schema and the content of sqlite_stat tables\n"
  ".headers on|off        Turn display of headers on or off\n"
  ".help                  Show this message\n"

  ".import FILE TABLE     Import data from FILE into TABLE\n"
#ifndef SQLITE_OMIT_TEST_CONTROL
  ".imposter INDEX TABLE  Create imposter table TABLE on index INDEX\n"
#endif
  ".indexes ?TABLE?       Show names of all indexes\n"
  "                         If TABLE specified, only show indexes for tables\n"
  "                         matching LIKE pattern TABLE.\n"
#ifdef SQLITE_ENABLE_IOTRACE
  ".iotrace FILE          Enable I/O diagnostic logging to FILE\n"
#endif
  ".limit ?LIMIT? ?VAL?   Display or change the value of an SQLITE_LIMIT\n"
  ".lint OPTIONS          Report potential schema issues. Options:\n"

  "                         fkey-indexes     Find missing foreign key indexes\n"
#ifndef SQLITE_OMIT_LOAD_EXTENSION
  ".load FILE ?ENTRY?     Load an extension library\n"
#endif
  ".log FILE|off          Turn logging on or off.  FILE can be stderr/stdout\n"
  ".mode MODE ?TABLE?     Set output mode where MODE is one of:\n"

  "                         ascii    Columns/rows delimited by 0x1F and 0x1E\n"
  "                         csv      Comma-separated values\n"
  "                         column   Left-aligned columns.  (See .width)\n"
  "                         html     HTML <table> code\n"
  "                         insert   SQL insert statements for TABLE\n"
  "                         line     One value per line\n"
  "                         list     Values delimited by \"|\"\n"
  "                         quote    Escape answers as for SQL\n"
  "                         tabs     Tab-separated values\n"
  "                         tcl      TCL list elements\n"
  ".nullvalue STRING      Use STRING in place of NULL values\n"
  ".once (-e|-x|FILE)     Output for the next SQL command only to FILE\n"


  "                         or invoke system text editor (-e) or spreadsheet (-x)\n"
  "                         on the output.\n"

  ".open ?OPTIONS? ?FILE? Close existing database and reopen FILE\n"
  "                         The --new option starts with an empty file\n"
  "                         Other options: --readonly --append --zip\n"





  ".output ?FILE?         Send output to FILE or stdout\n"

  ".print STRING...       Print literal STRING\n"
  ".prompt MAIN CONTINUE  Replace the standard prompts\n"
  ".quit                  Exit this program\n"
  ".read FILENAME         Execute SQL in FILENAME\n"

  ".restore ?DB? FILE     Restore content of DB (default \"main\") from FILE\n"
  ".save FILE             Write in-memory database into FILE\n"
  ".scanstats on|off      Turn sqlite3_stmt_scanstatus() metrics on or off\n"
  ".schema ?PATTERN?      Show the CREATE statements matching PATTERN\n"
  "                          Add --indent for pretty-printing\n"


  ".selftest ?--init?     Run tests defined in the SELFTEST table\n"
  ".separator COL ?ROW?   Change the column separator and optionally the row\n"
  "                         separator for both the output mode and .import\n"




#if defined(SQLITE_ENABLE_SESSION)
  ".session CMD ...       Create or control sessions\n"












#endif
  ".sha3sum ?OPTIONS...?  Compute a SHA3 hash of database content\n"







#ifndef SQLITE_NOHAVE_SYSTEM
  ".shell CMD ARGS...     Run CMD ARGS... in a system shell\n"
#endif
  ".show                  Show the current values for various settings\n"
  ".stats ?on|off?        Show stats or turn stats on or off\n"
#ifndef SQLITE_NOHAVE_SYSTEM
  ".system CMD ARGS...    Run CMD ARGS... in a system shell\n"
#endif
  ".tables ?TABLE?        List names of tables\n"
  "                         If TABLE specified, only list tables matching\n"
  "                         LIKE pattern TABLE.\n"
  ".testcase NAME         Begin redirecting output to 'testcase-out.txt'\n"
  ".timeout MS            Try opening locked tables for MS milliseconds\n"
  ".timer on|off          Turn SQL timer on or off\n"
  ".trace FILE|off        Output each SQL statement as it is run\n"
  ".vfsinfo ?AUX?         Information about the top-level VFS\n"
  ".vfslist               List all available VFSes\n"
  ".vfsname ?AUX?         Print the name of the VFS stack\n"
  ".width NUM1 NUM2 ...   Set column widths for \"column\" mode\n"
  "                         Negative values right-justify\n"

;

#if defined(SQLITE_ENABLE_SESSION)
/*
** Print help information for the ".sessions" command







*/
void session_help(ShellState *p){
  raw_printf(p->out,
    ".session ?NAME? SUBCOMMAND ?ARGS...?\n"
    "If ?NAME? is omitted, the first defined session is used.\n"
    "Subcommands:\n"
    "   attach TABLE             Attach TABLE\n"
    "   changeset FILE           Write a changeset into FILE\n"
    "   close                    Close one session\n"
    "   enable ?BOOLEAN?         Set or query the enable bit\n"
    "   filter GLOB...           Reject tables matching GLOBs\n"
    "   indirect ?BOOLEAN?       Mark or query the indirect status\n"
    "   isempty                  Query whether the session is empty\n"
    "   list                     List currently open session names\n"
    "   open DB NAME             Open a new session on DB\n"
    "   patchset FILE            Write a patchset into FILE\n"








  );






}
#endif











































/* Forward reference */
static int process_input(ShellState *p, FILE *in);

/*
** Read the content of file zName into memory obtained from sqlite3_malloc64()
** and return a pointer to the buffer. The caller is responsible for freeing
................................................................................
  sqlite3 *db;                    /* Database containing the archive */
};

/*
** Print a usage message for the .ar command to stderr and return SQLITE_ERROR.
*/
static int arUsage(FILE *f){
  raw_printf(f,
"\n"
"Usage: .ar [OPTION...] [FILE...]\n"
"The .ar command manages sqlar archives.\n"
"\n"
"Examples:\n"
"  .ar -cf archive.sar foo bar    # Create archive.sar from files foo and bar\n"
"  .ar -tf archive.sar            # List members of archive.sar\n"
"  .ar -xvf archive.sar           # Verbosely extract files from archive.sar\n"
"\n"
"Each command line must feature exactly one command option:\n"
"  -c, --create               Create a new archive\n"
"  -u, --update               Update or add files to an existing archive\n"
"  -t, --list                 List contents of archive\n"
"  -x, --extract              Extract files from archive\n"
"\n"
"And zero or more optional options:\n"
"  -v, --verbose              Print each filename as it is processed\n"
"  -f FILE, --file FILE       Operate on archive FILE (default is current db)\n"
"  -a FILE, --append FILE     Operate on FILE opened using the apndvfs VFS\n"
"  -C DIR, --directory DIR    Change to directory DIR to read/extract files\n"
"  -n, --dryrun               Show the SQL that would have occurred\n"
"\n"
"See also: http://sqlite.org/cli.html#sqlar_archive_support\n"
"\n"
);
  return SQLITE_ERROR;
}

/*
** Print an error message for the .ar command to stderr and return 
** SQLITE_ERROR.
*/
................................................................................
    { "directory", 'C', AR_SWITCH_DIRECTORY, 1 },
    { "dryrun",    'n', AR_SWITCH_DRYRUN,    0 },
  };
  int nSwitch = sizeof(aSwitch) / sizeof(struct ArSwitch);
  struct ArSwitch *pEnd = &aSwitch[nSwitch];

  if( nArg<=1 ){

    return arUsage(stderr);
  }else{
    char *z = azArg[1];
    if( z[0]!='-' ){
      /* Traditional style [tar] invocation */
      int i;
      int iArg = 2;
................................................................................
      utf8_printf(stderr,"Error: %s\n", zErrMsg);
      sqlite3_free(zErrMsg);
      rc = 1;
    }
  }else

  if( c=='d' && n>=3 && strncmp(azArg[0], "dbconfig", n)==0 ){
    static const struct DbConfigChoices {const char *zName; int op;} aDbConfig[] = {



        { "enable_fkey",      SQLITE_DBCONFIG_ENABLE_FKEY            },
        { "enable_trigger",   SQLITE_DBCONFIG_ENABLE_TRIGGER         },
        { "fts3_tokenizer",   SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER  },
        { "load_extension",   SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION  },
        { "no_ckpt_on_close", SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE       },
        { "enable_qpsg",      SQLITE_DBCONFIG_ENABLE_QPSG            },
        { "trigger_eqp",      SQLITE_DBCONFIG_TRIGGER_EQP            },
................................................................................
    }else{
      raw_printf(stderr, "Usage: .headers on|off\n");
      rc = 1;
    }
  }else

  if( c=='h' && strncmp(azArg[0], "help", n)==0 ){



    utf8_printf(p->out, "%s", zHelp);




  }else

  if( c=='i' && strncmp(azArg[0], "import", n)==0 ){
    char *zTable;               /* Insert data into this table */
    char *zFile;                /* Name of file to extra content from */
    sqlite3_stmt *pStmt = NULL; /* A statement */
    int nCol;                   /* Number of columns in the table */
................................................................................
      pSession->nFilter = 0;
      sqlite3session_table_filter(pSession->p, session_filter, pSession);
      p->nSession++;
      pSession->zName = sqlite3_mprintf("%s", zName);
    }else
    /* If no command name matches, show a syntax error */
    session_syntax_error:
    session_help(p);
  }else
#endif

#ifdef SQLITE_DEBUG
  /* Undocumented commands for internal testing.  Subject to change
  ** without notice. */
  if( c=='s' && n>=10 && strncmp(azArg[0], "selftest-", 9)==0 ){

  if( x!=sz ){
    sqlite3_result_error(context, "could not read back the whole file", -1);
    goto edit_func_end;
  }
  if( bBin ){
    sqlite3_result_blob64(context, p, sz, sqlite3_free);
  }else{
    sqlite3_int64 i, j;
    if( hasCRNL ){
      /* If the original contains \r\n then do no conversions back to \n */
      j = sz;
    }else{
      /* If the file did not originally contain \r\n then convert any new
      ** \r\n back into \n */
      for(i=j=0; i<sz; i++){
................................................................................
    sqlite3_free(zErr);
    free(zQ2);
  }
  return rc;
}

/*
** Text of help messages.
**
** The help text for each individual command begins with a line that starts
** with ".".  Subsequent lines are supplimental information.
**
** There must be two or more spaces between the end of the command and the
** start of the description of what that command does.
*/

static const char *(azHelp[]) = {
#if defined(SQLITE_HAVE_ZLIB) && !defined(SQLITE_OMIT_VIRTUALTABLE)
  ".archive ...             Manage SQL archives",
  "   Each command must have exactly one of the following options:",
  "     -c, --create               Create a new archive",
  "     -u, --update               Update or add files to an existing archive",
  "     -t, --list                 List contents of archive",
  "     -x, --extract              Extract files from archive",
  "   Optional arguments:",
  "     -v, --verbose              Print each filename as it is processed",
  "     -f FILE, --file FILE       Operate on archive FILE (default is current db)",
  "     -a FILE, --append FILE     Operate on FILE opened using the apndvfs VFS",
  "     -C DIR, --directory DIR    Change to directory DIR to read/extract files",
  "     -n, --dryrun               Show the SQL that would have occurred",
  "   Examples:",
  "     .ar -cf archive.sar foo bar  # Create archive.sar from files foo and bar",
  "     .ar -tf archive.sar          # List members of archive.sar",
  "     .ar -xvf archive.sar         # Verbosely extract files from archive.sar",
  "   See also:",
  "      http://sqlite.org/cli.html#sqlar_archive_support",
#endif
#ifndef SQLITE_OMIT_AUTHORIZATION
  ".auth ON|OFF             Show authorizer callbacks",
#endif
  ".backup ?DB? FILE        Backup DB (default \"main\") to FILE",

  "       --append            Use the appendvfs",
  ".bail on|off             Stop after hitting an error.  Default OFF",
  ".binary on|off           Turn binary output on or off.  Default OFF",
  ".cd DIRECTORY            Change the working directory to DIRECTORY",
  ".changes on|off          Show number of rows changed by SQL",
  ".check GLOB              Fail if output since .testcase does not match",
  ".clone NEWDB             Clone data into NEWDB from the existing database",
  ".databases               List names and files of attached databases",
  ".dbconfig ?op? ?val?     List or change sqlite3_db_config() options",
  ".dbinfo ?DB?             Show status information about the database",
  ".dump ?TABLE? ...        Render all database content as SQL",


  "   Options:",
  "     --preserve-rowids      Include ROWID values in the output",
  "     --newlines             Allow unescaped newline characters in output",
  "   TABLE is LIKE pattern for the tables to dump",
  ".echo on|off             Turn command echo on or off",
  ".eqp on|off|full         Enable or disable automatic EXPLAIN QUERY PLAN",
  ".excel                   Display the output of next command in a spreadsheet",

  ".exit ?CODE?             Exit this program with return-code CODE",
  ".expert                  EXPERIMENTAL. Suggest indexes for specified queries",
/* Because explain mode comes on automatically now, the ".explain" mode
** is removed from the help screen.  It is still supported for legacy, however */
/*".explain ?on|off|auto?   Turn EXPLAIN output mode on or off or to automatic",*/
  ".fullschema ?--indent?   Show schema and the content of sqlite_stat tables",
  ".headers on|off          Turn display of headers on or off",

  ".help ?-all? ?PATTERN?   Show help text for PATTERN",
  ".import FILE TABLE       Import data from FILE into TABLE",
#ifndef SQLITE_OMIT_TEST_CONTROL
  ".imposter INDEX TABLE    Create imposter table TABLE on index INDEX",
#endif
  ".indexes ?TABLE?         Show names of indexes",
  "                           If TABLE is specified, only show indexes for",
  "                           tables matching TABLE using the LIKE operator.",
#ifdef SQLITE_ENABLE_IOTRACE
  ".iotrace FILE            Enable I/O diagnostic logging to FILE",
#endif
  ".limit ?LIMIT? ?VAL?     Display or change the value of an SQLITE_LIMIT",
  ".lint OPTIONS            Report potential schema issues.",
  "     Options:",
  "        fkey-indexes     Find missing foreign key indexes",
#ifndef SQLITE_OMIT_LOAD_EXTENSION
  ".load FILE ?ENTRY?       Load an extension library",
#endif
  ".log FILE|off            Turn logging on or off.  FILE can be stderr/stdout",
  ".mode MODE ?TABLE?       Set output mode",
  "   MODE is one of:",
  "     ascii    Columns/rows delimited by 0x1F and 0x1E",
  "     csv      Comma-separated values",
  "     column   Left-aligned columns.  (See .width)",
  "     html     HTML <table> code",
  "     insert   SQL insert statements for TABLE",
  "     line     One value per line",
  "     list     Values delimited by \"|\"",
  "     quote    Escape answers as for SQL",
  "     tabs     Tab-separated values",
  "     tcl      TCL list elements",
  ".nullvalue STRING        Use STRING in place of NULL values",
  ".once (-e|-x|FILE)       Output for the next SQL command only to FILE",
  "     If FILE begins with '|' then open as a pipe",
  "     Other options:",
  "       -e    Invoke system text editor",

  "       -x    Open in a spreadsheet",
  ".open ?OPTIONS? ?FILE?   Close existing database and reopen FILE",


  "     Options:",
  "        --append      Use appendvfs to append database to the end of FILE",
  "        --new         Initialize FILE to an empty database",
  "        --readonly    Open FILE readonly",
  "        --zip         FILE is a ZIP archive",
  ".output ?FILE?           Send output to FILE or stdout if FILE is omitted",
  "     If FILE begins with '|' then open it as a pipe.",
  ".print STRING...         Print literal STRING",
  ".prompt MAIN CONTINUE    Replace the standard prompts",
  ".quit                    Exit this program",

  ".read FILE               Read input from FILE",
  ".restore ?DB? FILE       Restore content of DB (default \"main\") from FILE",
  ".save FILE               Write in-memory database into FILE",
  ".scanstats on|off        Turn sqlite3_stmt_scanstatus() metrics on or off",
  ".schema ?PATTERN?        Show the CREATE statements matching PATTERN",

  "     Options:",
  "         --indent            Try to pretty-print the schema",
  ".selftest ?OPTIONS?      Run tests defined in the SELFTEST table",


  "    Options:",
  "       --init               Create a new SELFTEST table",
  "       -v                   Verbose output",
  ".separator COL ?ROW?     Change the column and row separators",
#if defined(SQLITE_ENABLE_SESSION)
  ".session ?NAME? CMD ...  Create or control sessions",
  "   Subcommands:",
  "     attach TABLE             Attach TABLE",
  "     changeset FILE           Write a changeset into FILE",
  "     close                    Close one session",
  "     enable ?BOOLEAN?         Set or query the enable bit",
  "     filter GLOB...           Reject tables matching GLOBs",
  "     indirect ?BOOLEAN?       Mark or query the indirect status",
  "     isempty                  Query whether the session is empty",
  "     list                     List currently open session names",
  "     open DB NAME             Open a new session on DB",
  "     patchset FILE            Write a patchset into FILE",
  "   If ?NAME? is omitted, the first defined session is used.",
#endif
  ".sha3sum ...             Compute a SHA3 hash of database content",
  "    Options:",
  "      --schema              Also hash the sqlite_master table",
  "      --sha3-224            Use the sha3-224 algorithm",
  "      --sha3-256            Use the sha3-256 algorithm.  This is the default.",
  "      --sha3-384            Use the sha3-384 algorithm",
  "      --sha3-512            Use the sha3-512 algorithm",
  "    Any other argument is a LIKE pattern for tables to hash",
#ifndef SQLITE_NOHAVE_SYSTEM
  ".shell CMD ARGS...       Run CMD ARGS... in a system shell",
#endif
  ".show                    Show the current values for various settings",
  ".stats ?on|off?          Show stats or turn stats on or off",
#ifndef SQLITE_NOHAVE_SYSTEM
  ".system CMD ARGS...      Run CMD ARGS... in a system shell",
#endif
  ".tables ?TABLE?          List names of tables matching LIKE pattern TABLE",


  ".testcase NAME           Begin redirecting output to 'testcase-out.txt'",
  ".timeout MS              Try opening locked tables for MS milliseconds",
  ".timer on|off            Turn SQL timer on or off",
  ".trace FILE|off          Output each SQL statement as it is run",
  ".vfsinfo ?AUX?           Information about the top-level VFS",
  ".vfslist                 List all available VFSes",
  ".vfsname ?AUX?           Print the name of the VFS stack",
  ".width NUM1 NUM2 ...     Set column widths for \"column\" mode",
  "     Negative values right-justify",
};



/*

** Output help text.
**
** zPattern describes the set of commands for which help text is provided.
** If zPattern is NULL, then show all commands, but only give a one-line
** description of each.
**
** Return the number of matches.
*/















static int showHelp(FILE *out, const char *zPattern){
  int i, j;
  int n = 0;
  char *zPat;
  if( zPattern==0
   || zPattern[0]=='0'
   || strcmp(zPattern,"-a")==0
   || strcmp(zPattern,"-all")==0
  ){
    /* Show all commands, but only one line per command */
    if( zPattern==0 ) zPattern = "";
    for(i=0; i<ArraySize(azHelp); i++){
      if( azHelp[i][0]=='.' || zPattern[0] ){
        utf8_printf(out, "%s\n", azHelp[i]);
        n++;
      }

    }
  }else{
    /* Look for commands that for which zPattern is an exact prefix */
    zPat = sqlite3_mprintf(".%s*", zPattern);
    for(i=0; i<ArraySize(azHelp); i++){
      if( sqlite3_strglob(zPat, azHelp[i])==0 ){
        utf8_printf(out, "%s\n", azHelp[i]);
        j = i+1;
        n++;
      }
    }
    sqlite3_free(zPat);
    if( n ){
      if( n==1 ){
        /* when zPattern is a prefix of exactly one command, then include the
        ** details of that command, which should begin at offset j */
        while( j<ArraySize(azHelp)-1 && azHelp[j][0]!='.' ){
          utf8_printf(out, "%s\n", azHelp[j]);
          j++;
        }
      }
      return n;
    }
    /* Look for commands that contain zPattern anywhere.  Show the complete
    ** text of all commands that match. */
    zPat = sqlite3_mprintf("%%%s%%", zPattern);
    for(i=0; i<ArraySize(azHelp); i++){
      if( azHelp[i][0]=='.' ) j = i;
      if( sqlite3_strlike(zPat, azHelp[i], 0)==0 ){
        utf8_printf(out, "%s\n", azHelp[j]);
        while( j<ArraySize(azHelp)-1 && azHelp[j+1][0]!='.' ){
          j++;
          utf8_printf(out, "%s\n", azHelp[j]);
        }
        i = j;
        n++;
      }
    }
    sqlite3_free(zPat);
  }
  return n;
}

/* Forward reference */
static int process_input(ShellState *p, FILE *in);

/*
** Read the content of file zName into memory obtained from sqlite3_malloc64()
** and return a pointer to the buffer. The caller is responsible for freeing
................................................................................
  sqlite3 *db;                    /* Database containing the archive */
};

/*
** Print a usage message for the .ar command to stderr and return SQLITE_ERROR.
*/
static int arUsage(FILE *f){
  showHelp(f,"archive");

























  return SQLITE_ERROR;
}

/*
** Print an error message for the .ar command to stderr and return 
** SQLITE_ERROR.
*/
................................................................................
    { "directory", 'C', AR_SWITCH_DIRECTORY, 1 },
    { "dryrun",    'n', AR_SWITCH_DRYRUN,    0 },
  };
  int nSwitch = sizeof(aSwitch) / sizeof(struct ArSwitch);
  struct ArSwitch *pEnd = &aSwitch[nSwitch];

  if( nArg<=1 ){
    utf8_printf(stderr, "Wrong number of arguments.  Usage:\n");
    return arUsage(stderr);
  }else{
    char *z = azArg[1];
    if( z[0]!='-' ){
      /* Traditional style [tar] invocation */
      int i;
      int iArg = 2;
................................................................................
      utf8_printf(stderr,"Error: %s\n", zErrMsg);
      sqlite3_free(zErrMsg);
      rc = 1;
    }
  }else

  if( c=='d' && n>=3 && strncmp(azArg[0], "dbconfig", n)==0 ){
    static const struct DbConfigChoices {
      const char *zName;
      int op;
    } aDbConfig[] = {
        { "enable_fkey",      SQLITE_DBCONFIG_ENABLE_FKEY            },
        { "enable_trigger",   SQLITE_DBCONFIG_ENABLE_TRIGGER         },
        { "fts3_tokenizer",   SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER  },
        { "load_extension",   SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION  },
        { "no_ckpt_on_close", SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE       },
        { "enable_qpsg",      SQLITE_DBCONFIG_ENABLE_QPSG            },
        { "trigger_eqp",      SQLITE_DBCONFIG_TRIGGER_EQP            },
................................................................................
    }else{
      raw_printf(stderr, "Usage: .headers on|off\n");
      rc = 1;
    }
  }else

  if( c=='h' && strncmp(azArg[0], "help", n)==0 ){
    if( nArg>=2 ){
      int n = showHelp(p->out, azArg[1]);
      if( n==0 ){
        utf8_printf(p->out, "Nothing matches '%s'\n", azArg[1]);
      }
    }else{
      showHelp(p->out, 0);
    }
  }else

  if( c=='i' && strncmp(azArg[0], "import", n)==0 ){
    char *zTable;               /* Insert data into this table */
    char *zFile;                /* Name of file to extra content from */
    sqlite3_stmt *pStmt = NULL; /* A statement */
    int nCol;                   /* Number of columns in the table */
................................................................................
      pSession->nFilter = 0;
      sqlite3session_table_filter(pSession->p, session_filter, pSession);
      p->nSession++;
      pSession->zName = sqlite3_mprintf("%s", zName);
    }else
    /* If no command name matches, show a syntax error */
    session_syntax_error:
    showHelp(p->out, "session");
  }else
#endif

#ifdef SQLITE_DEBUG
  /* Undocumented commands for internal testing.  Subject to change
  ** without notice. */
  if( c=='s' && n>=10 && strncmp(azArg[0], "selftest-", 9)==0 ){

#define SQLITE_DeferFKs       0x00080000  /* Defer all FK constraints */
#define SQLITE_QueryOnly      0x00100000  /* Disable database changes */
#define SQLITE_CellSizeCk     0x00200000  /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer  0x00400000  /* Enable fts3_tokenizer(2) */
#define SQLITE_EnableQPSG     0x00800000  /* Query Planner Stability Guarantee*/
#define SQLITE_TriggerEQP     0x01000000  /* Show trigger EXPLAIN QUERY PLAN */
#define SQLITE_ResetDatabase  0x02000000  /* Reset the database */


/* Flags used only if debugging */
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       0x08000000  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x10000000  /* Debug listings of VDBE programs */
#define SQLITE_VdbeTrace      0x20000000  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace 0x40000000  /* Trace sqlite3VdbeAddOp() calls */
................................................................................
                         ** TK_SELECT_COLUMN: column of the result vector */
  i16 iAgg;              /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
  i16 iRightJoinTable;   /* If EP_FromJoin, the right table of the join */
  u8 op2;                /* TK_REGISTER: original value of Expr.op
                         ** TK_COLUMN: the value of p5 for OP_Column
                         ** TK_AGG_FUNCTION: nesting depth */
  AggInfo *pAggInfo;     /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */
  Table *pTab;           /* Table for TK_COLUMN expressions.  Can be NULL
                         ** for a column of an index on an expression */
#ifndef SQLITE_OMIT_WINDOWFUNC
  Window *pWin;          /* Window definition for window functions */
#endif
};

/*
** The following are the meanings of bits in the Expr.flags field.
*/
#define EP_FromJoin  0x000001 /* Originates in ON/USING clause of outer join */
#define EP_Agg       0x000002 /* Contains one or more aggregate functions */
................................................................................
#define EP_NoReduce  0x020000 /* Cannot EXPRDUP_REDUCE this Expr */
#define EP_Unlikely  0x040000 /* unlikely() or likelihood() function */
#define EP_ConstFunc 0x080000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */
#define EP_CanBeNull 0x100000 /* Can be null despite NOT NULL constraint */
#define EP_Subquery  0x200000 /* Tree contains a TK_SELECT operator */
#define EP_Alias     0x400000 /* Is an alias for a result set column */
#define EP_Leaf      0x800000 /* Expr.pLeft, .pRight, .u.pSelect all NULL */


/*
** The EP_Propagate mask is a set of properties that automatically propagate
** upwards into parent nodes.
*/
#define EP_Propagate (EP_Collate|EP_Subquery|EP_HasFunc)

................................................................................
**    OPFLAG_SEEKEQ       == BTREE_SEEK_EQ
**    OPFLAG_FORDELETE    == BTREE_FORDELETE
**    OPFLAG_SAVEPOSITION == BTREE_SAVEPOSITION
**    OPFLAG_AUXDELETE    == BTREE_AUXDELETE
*/
#define OPFLAG_NCHANGE       0x01    /* OP_Insert: Set to update db->nChange */
                                     /* Also used in P2 (not P5) of OP_Delete */

#define OPFLAG_EPHEM         0x01    /* OP_Column: Ephemeral output is ok */
#define OPFLAG_LASTROWID     0x20    /* Set to update db->lastRowid */
#define OPFLAG_ISUPDATE      0x04    /* This OP_Insert is an sql UPDATE */
#define OPFLAG_APPEND        0x08    /* This is likely to be an append */
#define OPFLAG_USESEEKRESULT 0x10    /* Try to avoid a seek in BtreeInsert() */
#define OPFLAG_ISNOOP        0x40    /* OP_Delete does pre-update-hook only */
#define OPFLAG_LENGTHARG     0x40    /* OP_Column only used for length() */
................................................................................
int sqlite3ExprNeedsNoAffinityChange(const Expr*, char);
int sqlite3IsRowid(const char*);
void sqlite3GenerateRowDelete(
    Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8,int);
void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int);
int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
void sqlite3ResolvePartIdxLabel(Parse*,int);

void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
                                     u8,u8,int,int*,int*,Upsert*);
#ifdef SQLITE_ENABLE_NULL_TRIM
  void sqlite3SetMakeRecordP5(Vdbe*,Table*);
#else
# define sqlite3SetMakeRecordP5(A,B)
#endif

#define SQLITE_DeferFKs       0x00080000  /* Defer all FK constraints */
#define SQLITE_QueryOnly      0x00100000  /* Disable database changes */
#define SQLITE_CellSizeCk     0x00200000  /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer  0x00400000  /* Enable fts3_tokenizer(2) */
#define SQLITE_EnableQPSG     0x00800000  /* Query Planner Stability Guarantee*/
#define SQLITE_TriggerEQP     0x01000000  /* Show trigger EXPLAIN QUERY PLAN */
#define SQLITE_ResetDatabase  0x02000000  /* Reset the database */
#define SQLITE_LegacyAlter    0x04000000  /* Legacy ALTER TABLE behaviour */

/* Flags used only if debugging */
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       0x08000000  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x10000000  /* Debug listings of VDBE programs */
#define SQLITE_VdbeTrace      0x20000000  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace 0x40000000  /* Trace sqlite3VdbeAddOp() calls */
................................................................................
                         ** TK_SELECT_COLUMN: column of the result vector */
  i16 iAgg;              /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
  i16 iRightJoinTable;   /* If EP_FromJoin, the right table of the join */
  u8 op2;                /* TK_REGISTER: original value of Expr.op
                         ** TK_COLUMN: the value of p5 for OP_Column
                         ** TK_AGG_FUNCTION: nesting depth */
  AggInfo *pAggInfo;     /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */
  union {
    Table *pTab;           /* TK_COLUMN: Table containing column. Can be NULL
                           ** for a column of an index on an expression */
    Window *pWin;          /* TK_FUNCTION: Window definition for the func */
  } y;
};

/*
** The following are the meanings of bits in the Expr.flags field.
*/
#define EP_FromJoin  0x000001 /* Originates in ON/USING clause of outer join */
#define EP_Agg       0x000002 /* Contains one or more aggregate functions */
................................................................................
#define EP_NoReduce  0x020000 /* Cannot EXPRDUP_REDUCE this Expr */
#define EP_Unlikely  0x040000 /* unlikely() or likelihood() function */
#define EP_ConstFunc 0x080000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */
#define EP_CanBeNull 0x100000 /* Can be null despite NOT NULL constraint */
#define EP_Subquery  0x200000 /* Tree contains a TK_SELECT operator */
#define EP_Alias     0x400000 /* Is an alias for a result set column */
#define EP_Leaf      0x800000 /* Expr.pLeft, .pRight, .u.pSelect all NULL */
#define EP_WinFunc  0x1000000 /* TK_FUNCTION with Expr.y.pWin set */

/*
** The EP_Propagate mask is a set of properties that automatically propagate
** upwards into parent nodes.
*/
#define EP_Propagate (EP_Collate|EP_Subquery|EP_HasFunc)

................................................................................
**    OPFLAG_SEEKEQ       == BTREE_SEEK_EQ
**    OPFLAG_FORDELETE    == BTREE_FORDELETE
**    OPFLAG_SAVEPOSITION == BTREE_SAVEPOSITION
**    OPFLAG_AUXDELETE    == BTREE_AUXDELETE
*/
#define OPFLAG_NCHANGE       0x01    /* OP_Insert: Set to update db->nChange */
                                     /* Also used in P2 (not P5) of OP_Delete */
#define OPFLAG_NOCHNG        0x01    /* OP_VColumn nochange for UPDATE */
#define OPFLAG_EPHEM         0x01    /* OP_Column: Ephemeral output is ok */
#define OPFLAG_LASTROWID     0x20    /* Set to update db->lastRowid */
#define OPFLAG_ISUPDATE      0x04    /* This OP_Insert is an sql UPDATE */
#define OPFLAG_APPEND        0x08    /* This is likely to be an append */
#define OPFLAG_USESEEKRESULT 0x10    /* Try to avoid a seek in BtreeInsert() */
#define OPFLAG_ISNOOP        0x40    /* OP_Delete does pre-update-hook only */
#define OPFLAG_LENGTHARG     0x40    /* OP_Column only used for length() */
................................................................................
int sqlite3ExprNeedsNoAffinityChange(const Expr*, char);
int sqlite3IsRowid(const char*);
void sqlite3GenerateRowDelete(
    Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8,int);
void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int);
int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
void sqlite3ResolvePartIdxLabel(Parse*,int);
int sqlite3ExprReferencesUpdatedColumn(Expr*,int*,int);
void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
                                     u8,u8,int,int*,int*,Upsert*);
#ifdef SQLITE_ENABLE_NULL_TRIM
  void sqlite3SetMakeRecordP5(Vdbe*,Table*);
#else
# define sqlite3SetMakeRecordP5(A,B)
#endif

  */
#ifdef SQLITE_TCL_DEFAULT_FULLMUTEX
  flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX;
#else
  flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_NOMUTEX;
#endif


  if( objc==2 ){
    zArg = Tcl_GetStringFromObj(objv[1], 0);
    if( strcmp(zArg,"-version")==0 ){
      Tcl_AppendResult(interp,sqlite3_libversion(), (char*)0);
      return TCL_OK;
    }
    if( strcmp(zArg,"-sourceid")==0 ){

  */
#ifdef SQLITE_TCL_DEFAULT_FULLMUTEX
  flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX;
#else
  flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_NOMUTEX;
#endif

  if( objc==1 ) return sqliteCmdUsage(interp, objv);
  if( objc==2 ){
    zArg = Tcl_GetStringFromObj(objv[1], 0);
    if( strcmp(zArg,"-version")==0 ){
      Tcl_AppendResult(interp,sqlite3_libversion(), (char*)0);
      return TCL_OK;
    }
    if( strcmp(zArg,"-sourceid")==0 ){

  Tcl_Obj *CONST objv[]
){
  extern int sqlite3_amatch_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_carray_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_closure_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_csv_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_eval_init(sqlite3*,char**,const sqlite3_api_routines*);

  extern int sqlite3_fileio_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_fuzzer_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_ieee_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_nextchar_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_percentile_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_regexp_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_remember_init(sqlite3*,char**,const sqlite3_api_routines*);
................................................................................
    int (*pInit)(sqlite3*,char**,const sqlite3_api_routines*);
  } aExtension[] = {
    { "amatch",                sqlite3_amatch_init               },
    { "carray",                sqlite3_carray_init               },
    { "closure",               sqlite3_closure_init              },
    { "csv",                   sqlite3_csv_init                  },
    { "eval",                  sqlite3_eval_init                 },

    { "fileio",                sqlite3_fileio_init               },
    { "fuzzer",                sqlite3_fuzzer_init               },
    { "ieee754",               sqlite3_ieee_init                 },
    { "nextchar",              sqlite3_nextchar_init             },
    { "percentile",            sqlite3_percentile_init           },
    { "regexp",                sqlite3_regexp_init               },
    { "remember",              sqlite3_remember_init             },

  Tcl_Obj *CONST objv[]
){
  extern int sqlite3_amatch_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_carray_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_closure_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_csv_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_eval_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_explain_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_fileio_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_fuzzer_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_ieee_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_nextchar_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_percentile_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_regexp_init(sqlite3*,char**,const sqlite3_api_routines*);
  extern int sqlite3_remember_init(sqlite3*,char**,const sqlite3_api_routines*);
................................................................................
    int (*pInit)(sqlite3*,char**,const sqlite3_api_routines*);
  } aExtension[] = {
    { "amatch",                sqlite3_amatch_init               },
    { "carray",                sqlite3_carray_init               },
    { "closure",               sqlite3_closure_init              },
    { "csv",                   sqlite3_csv_init                  },
    { "eval",                  sqlite3_eval_init                 },
    { "explain",               sqlite3_explain_init              },
    { "fileio",                sqlite3_fileio_init               },
    { "fuzzer",                sqlite3_fuzzer_init               },
    { "ieee754",               sqlite3_ieee_init                 },
    { "nextchar",              sqlite3_nextchar_init             },
    { "percentile",            sqlite3_percentile_init           },
    { "regexp",                sqlite3_regexp_init               },
    { "remember",              sqlite3_remember_init             },

  Tcl_SetVar2(interp, "sqlite_options", "mmap", "0", TCL_GLOBAL_ONLY);
#endif

  Tcl_SetVar2(interp, "sqlite_options", "worker_threads", 
      STRINGVALUE(SQLITE_MAX_WORKER_THREADS), TCL_GLOBAL_ONLY
  );

#if 1 /* def SQLITE_MEMDEBUG */
  Tcl_SetVar2(interp, "sqlite_options", "memdebug", "1", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "memdebug", "0", TCL_GLOBAL_ONLY);
#endif

#ifdef SQLITE_ENABLE_8_3_NAMES
  Tcl_SetVar2(interp, "sqlite_options", "8_3_names", "1", TCL_GLOBAL_ONLY);

  Tcl_SetVar2(interp, "sqlite_options", "mmap", "0", TCL_GLOBAL_ONLY);
#endif

  Tcl_SetVar2(interp, "sqlite_options", "worker_threads", 
      STRINGVALUE(SQLITE_MAX_WORKER_THREADS), TCL_GLOBAL_ONLY
  );

#ifdef SQLITE_MEMDEBUG 
  Tcl_SetVar2(interp, "sqlite_options", "memdebug", "1", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "memdebug", "0", TCL_GLOBAL_ONLY);
#endif

#ifdef SQLITE_ENABLE_8_3_NAMES
  Tcl_SetVar2(interp, "sqlite_options", "8_3_names", "1", TCL_GLOBAL_ONLY);

      Window *pWin;
      if( ExprHasProperty(pExpr, EP_TokenOnly) ){
        pFarg = 0;
        pWin = 0;
      }else{
        pFarg = pExpr->x.pList;
#ifndef SQLITE_OMIT_WINDOWFUNC
        pWin = pExpr->pWin;
#else
        pWin = 0;
#endif 
      }
      if( pExpr->op==TK_AGG_FUNCTION ){
        sqlite3TreeViewLine(pView, "AGG_FUNCTION%d %Q",
                             pExpr->op2, pExpr->u.zToken);

      Window *pWin;
      if( ExprHasProperty(pExpr, EP_TokenOnly) ){
        pFarg = 0;
        pWin = 0;
      }else{
        pFarg = pExpr->x.pList;
#ifndef SQLITE_OMIT_WINDOWFUNC
        pWin = pExpr->y.pWin;
#else
        pWin = 0;
#endif 
      }
      if( pExpr->op==TK_AGG_FUNCTION ){
        sqlite3TreeViewLine(pView, "AGG_FUNCTION%d %Q",
                             pExpr->op2, pExpr->u.zToken);

  }
#ifndef SQLITE_OMIT_FLOATING_POINT
  if( pTab->aCol[i].affinity==SQLITE_AFF_REAL ){
    sqlite3VdbeAddOp1(v, OP_RealAffinity, iReg);
  }
#endif
}




















































/*
** Process an UPDATE statement.
**
**   UPDATE OR IGNORE table_wxyz SET a=b, c=d WHERE e<5 AND f NOT NULL;
**          \_______/ \________/     \______/       \________________/
*            onError   pTabList      pChanges             pWhere
................................................................................
  pTabList->a[0].colUsed = IsVirtual(pTab) ? ALLBITS : 0;

  hasFK = sqlite3FkRequired(pParse, pTab, aXRef, chngKey);

  /* There is one entry in the aRegIdx[] array for each index on the table
  ** being updated.  Fill in aRegIdx[] with a register number that will hold
  ** the key for accessing each index.
  **
  ** FIXME:  Be smarter about omitting indexes that use expressions.
  */
  for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
    int reg;
    if( chngKey || hasFK>1 || pIdx->pPartIdxWhere || pIdx==pPk ){


      reg = ++pParse->nMem;
      pParse->nMem += pIdx->nColumn;
    }else{
      reg = 0;
      for(i=0; i<pIdx->nKeyCol; i++){
        i16 iIdxCol = pIdx->aiColumn[i];
        if( iIdxCol<0 || aXRef[iIdxCol]>=0 ){
          reg = ++pParse->nMem;
          pParse->nMem += pIdx->nColumn;
          if( (onError==OE_Replace)
           || (onError==OE_Default && pIdx->onError==OE_Replace) 
          ){
            bReplace = 1;
          }
................................................................................

  /* Populate the argument registers. */
  for(i=0; i<pTab->nCol; i++){
    if( aXRef[i]>=0 ){
      sqlite3ExprCode(pParse, pChanges->a[aXRef[i]].pExpr, regArg+2+i);
    }else{
      sqlite3VdbeAddOp3(v, OP_VColumn, iCsr, i, regArg+2+i);
      sqlite3VdbeChangeP5(v, 1); /* Enable sqlite3_vtab_nochange() */
    }
  }
  if( HasRowid(pTab) ){
    sqlite3VdbeAddOp2(v, OP_Rowid, iCsr, regArg);
    if( pRowid ){
      sqlite3ExprCode(pParse, pRowid, regArg+1);
    }else{

  }
#ifndef SQLITE_OMIT_FLOATING_POINT
  if( pTab->aCol[i].affinity==SQLITE_AFF_REAL ){
    sqlite3VdbeAddOp1(v, OP_RealAffinity, iReg);
  }
#endif
}

/*
** Check to see if column iCol of index pIdx references any of the
** columns defined by aXRef and chngRowid.  Return true if it does
** and false if not.  This is an optimization.  False-positives are a
** performance degradation, but false-negatives can result in a corrupt
** index and incorrect answers.
**
** aXRef[j] will be non-negative if column j of the original table is
** being updated.  chngRowid will be true if the rowid of the table is
** being updated.
*/
static int indexColumnIsBeingUpdated(
  Index *pIdx,      /* The index to check */
  int iCol,         /* Which column of the index to check */
  int *aXRef,       /* aXRef[j]>=0 if column j is being updated */
  int chngRowid     /* true if the rowid is being updated */
){
  i16 iIdxCol = pIdx->aiColumn[iCol];
  assert( iIdxCol!=XN_ROWID ); /* Cannot index rowid */
  if( iIdxCol>=0 ){
    return aXRef[iIdxCol]>=0;
  }
  assert( iIdxCol==XN_EXPR );
  assert( pIdx->aColExpr!=0 );
  assert( pIdx->aColExpr->a[iCol].pExpr!=0 );
  return sqlite3ExprReferencesUpdatedColumn(pIdx->aColExpr->a[iCol].pExpr,
                                            aXRef,chngRowid);
}

/*
** Check to see if index pIdx is a partial index whose conditional
** expression might change values due to an UPDATE.  Return true if
** the index is subject to change and false if the index is guaranteed
** to be unchanged.  This is an optimization.  False-positives are a
** performance degradation, but false-negatives can result in a corrupt
** index and incorrect answers.
**
** aXRef[j] will be non-negative if column j of the original table is
** being updated.  chngRowid will be true if the rowid of the table is
** being updated.
*/
static int indexWhereClauseMightChange(
  Index *pIdx,      /* The index to check */
  int *aXRef,       /* aXRef[j]>=0 if column j is being updated */
  int chngRowid     /* true if the rowid is being updated */
){
  if( pIdx->pPartIdxWhere==0 ) return 0;
  return sqlite3ExprReferencesUpdatedColumn(pIdx->pPartIdxWhere,
                                            aXRef, chngRowid);
}

/*
** Process an UPDATE statement.
**
**   UPDATE OR IGNORE table_wxyz SET a=b, c=d WHERE e<5 AND f NOT NULL;
**          \_______/ \________/     \______/       \________________/
*            onError   pTabList      pChanges             pWhere
................................................................................
  pTabList->a[0].colUsed = IsVirtual(pTab) ? ALLBITS : 0;

  hasFK = sqlite3FkRequired(pParse, pTab, aXRef, chngKey);

  /* There is one entry in the aRegIdx[] array for each index on the table
  ** being updated.  Fill in aRegIdx[] with a register number that will hold
  ** the key for accessing each index.


  */
  for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
    int reg;
    if( chngKey || hasFK>1 || pIdx==pPk
     || indexWhereClauseMightChange(pIdx,aXRef,chngRowid)
    ){
      reg = ++pParse->nMem;
      pParse->nMem += pIdx->nColumn;
    }else{
      reg = 0;
      for(i=0; i<pIdx->nKeyCol; i++){
        if( indexColumnIsBeingUpdated(pIdx, i, aXRef, chngRowid) ){

          reg = ++pParse->nMem;
          pParse->nMem += pIdx->nColumn;
          if( (onError==OE_Replace)
           || (onError==OE_Default && pIdx->onError==OE_Replace) 
          ){
            bReplace = 1;
          }
................................................................................

  /* Populate the argument registers. */
  for(i=0; i<pTab->nCol; i++){
    if( aXRef[i]>=0 ){
      sqlite3ExprCode(pParse, pChanges->a[aXRef[i]].pExpr, regArg+2+i);
    }else{
      sqlite3VdbeAddOp3(v, OP_VColumn, iCsr, i, regArg+2+i);
      sqlite3VdbeChangeP5(v, OPFLAG_NOCHNG);/* Enable sqlite3_vtab_nochange() */
    }
  }
  if( HasRowid(pTab) ){
    sqlite3VdbeAddOp2(v, OP_Rowid, iCsr, regArg);
    if( pRowid ){
      sqlite3ExprCode(pParse, pRowid, regArg+1);
    }else{

  }else{
    /* Rare case of a really large header */
    nVarint = sqlite3VarintLen(nHdr);
    nHdr += nVarint;
    if( nVarint<sqlite3VarintLen(nHdr) ) nHdr++;
  }
  nByte = nHdr+nData;
  if( nByte+nZero>db->aLimit[SQLITE_LIMIT_LENGTH] ){
    goto too_big;
  }

  /* Make sure the output register has a buffer large enough to store 
  ** the new record. The output register (pOp->p3) is not allowed to
  ** be one of the input registers (because the following call to
  ** sqlite3VdbeMemClearAndResize() could clobber the value before it is used).
  */










  if( sqlite3VdbeMemClearAndResize(pOut, (int)nByte) ){
    goto no_mem;

  }
  zNewRecord = (u8 *)pOut->z;

  /* Write the record */
  i = putVarint32(zNewRecord, nHdr);
  j = nHdr;
  assert( pData0<=pLast );
................................................................................
    db->mDbFlags |= DBFLAG_SchemaChange;
    p->expired = 0;
  }else
#endif
  {
    zMaster = MASTER_NAME;
    initData.db = db;
    initData.iDb = pOp->p1;
    initData.pzErrMsg = &p->zErrMsg;
    initData.mInitFlags = 0;
    zSql = sqlite3MPrintf(db,
       "SELECT name, rootpage, sql FROM '%q'.%s WHERE %s ORDER BY rowid",
       db->aDb[iDb].zDbSName, zMaster, pOp->p4.z);
    if( zSql==0 ){
      rc = SQLITE_NOMEM_BKPT;
................................................................................
** Synopsis: r[P3]=vcolumn(P2)
**
** Store in register P3 the value of the P2-th column of
** the current row of the virtual-table of cursor P1.
**
** If the VColumn opcode is being used to fetch the value of
** an unchanging column during an UPDATE operation, then the P5
** value is 1.  Otherwise, P5 is 0.  The P5 value is returned
** by sqlite3_vtab_nochange() routine and can be used
** by virtual table implementations to return special "no-change"
** marks which can be more efficient, depending on the virtual table.

*/
case OP_VColumn: {
  sqlite3_vtab *pVtab;
  const sqlite3_module *pModule;
  Mem *pDest;
  sqlite3_context sContext;

................................................................................
    break;
  }
  pVtab = pCur->uc.pVCur->pVtab;
  pModule = pVtab->pModule;
  assert( pModule->xColumn );
  memset(&sContext, 0, sizeof(sContext));
  sContext.pOut = pDest;

  if( pOp->p5 ){
    sqlite3VdbeMemSetNull(pDest);
    pDest->flags = MEM_Null|MEM_Zero;
    pDest->u.nZero = 0;
  }else{
    MemSetTypeFlag(pDest, MEM_Null);
  }
  rc = pModule->xColumn(pCur->uc.pVCur, &sContext, pOp->p2);
................................................................................
** P4 is a pointer to a virtual table object, an sqlite3_vtab structure.
** This opcode invokes the corresponding xRename method. The value
** in register P1 is passed as the zName argument to the xRename method.
*/
case OP_VRename: {
  sqlite3_vtab *pVtab;
  Mem *pName;




  pVtab = pOp->p4.pVtab->pVtab;
  pName = &aMem[pOp->p1];
  assert( pVtab->pModule->xRename );
  assert( memIsValid(pName) );
  assert( p->readOnly==0 );
  REGISTER_TRACE(pOp->p1, pName);
  assert( pName->flags & MEM_Str );
  testcase( pName->enc==SQLITE_UTF8 );
  testcase( pName->enc==SQLITE_UTF16BE );
  testcase( pName->enc==SQLITE_UTF16LE );
  rc = sqlite3VdbeChangeEncoding(pName, SQLITE_UTF8);
  if( rc ) goto abort_due_to_error;
  rc = pVtab->pModule->xRename(pVtab, pName->z);

  sqlite3VtabImportErrmsg(p, pVtab);
  p->expired = 0;
  if( rc ) goto abort_due_to_error;
  break;
}
#endif

  }else{
    /* Rare case of a really large header */
    nVarint = sqlite3VarintLen(nHdr);
    nHdr += nVarint;
    if( nVarint<sqlite3VarintLen(nHdr) ) nHdr++;
  }
  nByte = nHdr+nData;




  /* Make sure the output register has a buffer large enough to store 
  ** the new record. The output register (pOp->p3) is not allowed to
  ** be one of the input registers (because the following call to
  ** sqlite3VdbeMemClearAndResize() could clobber the value before it is used).
  */
  if( nByte+nZero<=pOut->szMalloc ){
    /* The output register is already large enough to hold the record.
    ** No error checks or buffer enlargement is required */
    pOut->z = pOut->zMalloc;
  }else{
    /* Need to make sure that the output is not too big and then enlarge
    ** the output register to hold the full result */
    if( nByte+nZero>db->aLimit[SQLITE_LIMIT_LENGTH] ){
      goto too_big;
    }
    if( sqlite3VdbeMemClearAndResize(pOut, (int)nByte) ){
      goto no_mem;
    }
  }
  zNewRecord = (u8 *)pOut->z;

  /* Write the record */
  i = putVarint32(zNewRecord, nHdr);
  j = nHdr;
  assert( pData0<=pLast );
................................................................................
    db->mDbFlags |= DBFLAG_SchemaChange;
    p->expired = 0;
  }else
#endif
  {
    zMaster = MASTER_NAME;
    initData.db = db;
    initData.iDb = iDb;
    initData.pzErrMsg = &p->zErrMsg;
    initData.mInitFlags = 0;
    zSql = sqlite3MPrintf(db,
       "SELECT name, rootpage, sql FROM '%q'.%s WHERE %s ORDER BY rowid",
       db->aDb[iDb].zDbSName, zMaster, pOp->p4.z);
    if( zSql==0 ){
      rc = SQLITE_NOMEM_BKPT;
................................................................................
** Synopsis: r[P3]=vcolumn(P2)
**
** Store in register P3 the value of the P2-th column of
** the current row of the virtual-table of cursor P1.
**
** If the VColumn opcode is being used to fetch the value of
** an unchanging column during an UPDATE operation, then the P5
** value is OPFLAG_NOCHNG.  This will cause the sqlite3_vtab_nochange()
** function to return true inside the xColumn method of the virtual
** table implementation.  The P5 column might also contain other
** bits (OPFLAG_LENGTHARG or OPFLAG_TYPEOFARG) but those bits are
** unused by OP_VColumn.
*/
case OP_VColumn: {
  sqlite3_vtab *pVtab;
  const sqlite3_module *pModule;
  Mem *pDest;
  sqlite3_context sContext;

................................................................................
    break;
  }
  pVtab = pCur->uc.pVCur->pVtab;
  pModule = pVtab->pModule;
  assert( pModule->xColumn );
  memset(&sContext, 0, sizeof(sContext));
  sContext.pOut = pDest;
  testcase( (pOp->p5 & OPFLAG_NOCHNG)==0 && pOp->p5!=0 );
  if( pOp->p5 & OPFLAG_NOCHNG ){
    sqlite3VdbeMemSetNull(pDest);
    pDest->flags = MEM_Null|MEM_Zero;
    pDest->u.nZero = 0;
  }else{
    MemSetTypeFlag(pDest, MEM_Null);
  }
  rc = pModule->xColumn(pCur->uc.pVCur, &sContext, pOp->p2);
................................................................................
** P4 is a pointer to a virtual table object, an sqlite3_vtab structure.
** This opcode invokes the corresponding xRename method. The value
** in register P1 is passed as the zName argument to the xRename method.
*/
case OP_VRename: {
  sqlite3_vtab *pVtab;
  Mem *pName;
  int isLegacy;
  
  isLegacy = (db->flags & SQLITE_LegacyAlter);
  db->flags |= SQLITE_LegacyAlter;
  pVtab = pOp->p4.pVtab->pVtab;
  pName = &aMem[pOp->p1];
  assert( pVtab->pModule->xRename );
  assert( memIsValid(pName) );
  assert( p->readOnly==0 );
  REGISTER_TRACE(pOp->p1, pName);
  assert( pName->flags & MEM_Str );
  testcase( pName->enc==SQLITE_UTF8 );
  testcase( pName->enc==SQLITE_UTF16BE );
  testcase( pName->enc==SQLITE_UTF16LE );
  rc = sqlite3VdbeChangeEncoding(pName, SQLITE_UTF8);
  if( rc ) goto abort_due_to_error;
  rc = pVtab->pModule->xRename(pVtab, pName->z);
  if( isLegacy==0 ) db->flags &= ~SQLITE_LegacyAlter;
  sqlite3VtabImportErrmsg(p, pVtab);
  p->expired = 0;
  if( rc ) goto abort_due_to_error;
  break;
}
#endif

    return rc;
  }

  /* The index entry must begin with a header size */
  (void)getVarint32((u8*)m.z, szHdr);
  testcase( szHdr==3 );
  testcase( szHdr==m.n );


  if( unlikely(szHdr<3 || (int)szHdr>m.n) ){
    goto idx_rowid_corruption;
  }

  /* The last field of the index should be an integer - the ROWID.
  ** Verify that the last entry really is an integer. */
  (void)getVarint32((u8*)&m.z[szHdr-1], typeRowid);
  testcase( typeRowid==1 );

    return rc;
  }

  /* The index entry must begin with a header size */
  (void)getVarint32((u8*)m.z, szHdr);
  testcase( szHdr==3 );
  testcase( szHdr==m.n );
  testcase( szHdr>0x7fffffff );
  assert( m.n>=0 );
  if( unlikely(szHdr<3 || szHdr>(unsigned)m.n) ){
    goto idx_rowid_corruption;
  }

  /* The last field of the index should be an integer - the ROWID.
  ** Verify that the last entry really is an integer. */
  (void)getVarint32((u8*)&m.z[szHdr-1], typeRowid);
  testcase( typeRowid==1 );

void sqlite3VtabBeginParse(
  Parse *pParse,        /* Parsing context */
  Token *pName1,        /* Name of new table, or database name */
  Token *pName2,        /* Name of new table or NULL */
  Token *pModuleName,   /* Name of the module for the virtual table */
  int ifNotExists       /* No error if the table already exists */
){
  int iDb;              /* The database the table is being created in */
  Table *pTable;        /* The new virtual table */
  sqlite3 *db;          /* Database connection */

  sqlite3StartTable(pParse, pName1, pName2, 0, 0, 1, ifNotExists);
  pTable = pParse->pNewTable;
  if( pTable==0 ) return;
  assert( 0==pTable->pIndex );

  db = pParse->db;
  iDb = sqlite3SchemaToIndex(db, pTable->pSchema);
  assert( iDb>=0 );

  assert( pTable->nModuleArg==0 );
  addModuleArgument(db, pTable, sqlite3NameFromToken(db, pModuleName));
  addModuleArgument(db, pTable, 0);
  addModuleArgument(db, pTable, sqlite3DbStrDup(db, pTable->zName));
  assert( (pParse->sNameToken.z==pName2->z && pName2->z!=0)
       || (pParse->sNameToken.z==pName1->z && pName2->z==0)
................................................................................
#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Creating a virtual table invokes the authorization callback twice.
  ** The first invocation, to obtain permission to INSERT a row into the
  ** sqlite_master table, has already been made by sqlite3StartTable().
  ** The second call, to obtain permission to create the table, is made now.
  */
  if( pTable->azModuleArg ){


    sqlite3AuthCheck(pParse, SQLITE_CREATE_VTABLE, pTable->zName, 
            pTable->azModuleArg[0], pParse->db->aDb[iDb].zDbSName);
  }
#endif
}

/*
................................................................................
  void *pArg = 0;
  FuncDef *pNew;
  int rc = 0;

  /* Check to see the left operand is a column in a virtual table */
  if( NEVER(pExpr==0) ) return pDef;
  if( pExpr->op!=TK_COLUMN ) return pDef;
  pTab = pExpr->pTab;
  if( pTab==0 ) return pDef;
  if( !IsVirtual(pTab) ) return pDef;
  pVtab = sqlite3GetVTable(db, pTab)->pVtab;
  assert( pVtab!=0 );
  assert( pVtab->pModule!=0 );
  pMod = (sqlite3_module *)pVtab->pModule;
  if( pMod->xFindFunction==0 ) return pDef;

void sqlite3VtabBeginParse(
  Parse *pParse,        /* Parsing context */
  Token *pName1,        /* Name of new table, or database name */
  Token *pName2,        /* Name of new table or NULL */
  Token *pModuleName,   /* Name of the module for the virtual table */
  int ifNotExists       /* No error if the table already exists */
){

  Table *pTable;        /* The new virtual table */
  sqlite3 *db;          /* Database connection */

  sqlite3StartTable(pParse, pName1, pName2, 0, 0, 1, ifNotExists);
  pTable = pParse->pNewTable;
  if( pTable==0 ) return;
  assert( 0==pTable->pIndex );

  db = pParse->db;



  assert( pTable->nModuleArg==0 );
  addModuleArgument(db, pTable, sqlite3NameFromToken(db, pModuleName));
  addModuleArgument(db, pTable, 0);
  addModuleArgument(db, pTable, sqlite3DbStrDup(db, pTable->zName));
  assert( (pParse->sNameToken.z==pName2->z && pName2->z!=0)
       || (pParse->sNameToken.z==pName1->z && pName2->z==0)
................................................................................
#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Creating a virtual table invokes the authorization callback twice.
  ** The first invocation, to obtain permission to INSERT a row into the
  ** sqlite_master table, has already been made by sqlite3StartTable().
  ** The second call, to obtain permission to create the table, is made now.
  */
  if( pTable->azModuleArg ){
    int iDb = sqlite3SchemaToIndex(db, pTable->pSchema);
    assert( iDb>=0 ); /* The database the table is being created in */
    sqlite3AuthCheck(pParse, SQLITE_CREATE_VTABLE, pTable->zName, 
            pTable->azModuleArg[0], pParse->db->aDb[iDb].zDbSName);
  }
#endif
}

/*
................................................................................
  void *pArg = 0;
  FuncDef *pNew;
  int rc = 0;

  /* Check to see the left operand is a column in a virtual table */
  if( NEVER(pExpr==0) ) return pDef;
  if( pExpr->op!=TK_COLUMN ) return pDef;
  pTab = pExpr->y.pTab;
  if( pTab==0 ) return pDef;
  if( !IsVirtual(pTab) ) return pDef;
  pVtab = sqlite3GetVTable(db, pTab)->pVtab;
  assert( pVtab!=0 );
  assert( pVtab->pModule!=0 );
  pMod = (sqlite3_module *)pVtab->pModule;
  if( pMod->xFindFunction==0 ) return pDef;

        continue;
      }else if( ExprHasProperty(pExpr, EP_xIsSelect) ){
        if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort;
      }else if( pExpr->x.pList ){
        if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort;
      }
#ifndef SQLITE_OMIT_WINDOWFUNC
      if( !ExprHasProperty(pExpr, EP_Reduced) && pExpr->pWin ){
        Window *pWin = pExpr->pWin;
        if( sqlite3WalkExprList(pWalker, pWin->pPartition) ) return WRC_Abort;
        if( sqlite3WalkExprList(pWalker, pWin->pOrderBy) ) return WRC_Abort;
        if( sqlite3WalkExpr(pWalker, pWin->pFilter) ) return WRC_Abort;
      }
#endif
    }
    break;

        continue;
      }else if( ExprHasProperty(pExpr, EP_xIsSelect) ){
        if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort;
      }else if( pExpr->x.pList ){
        if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort;
      }
#ifndef SQLITE_OMIT_WINDOWFUNC
      if( ExprHasProperty(pExpr, EP_WinFunc) ){
        Window *pWin = pExpr->y.pWin;
        if( sqlite3WalkExprList(pWalker, pWin->pPartition) ) return WRC_Abort;
        if( sqlite3WalkExprList(pWalker, pWin->pOrderBy) ) return WRC_Abort;
        if( sqlite3WalkExpr(pWalker, pWin->pFilter) ) return WRC_Abort;
      }
#endif
    }
    break;

**    (4)  The template has the same or lower cost than the current loop
*/
static int whereLoopInsert(WhereLoopBuilder *pBuilder, WhereLoop *pTemplate){
  WhereLoop **ppPrev, *p;
  WhereInfo *pWInfo = pBuilder->pWInfo;
  sqlite3 *db = pWInfo->pParse->db;
  int rc;









  /* If pBuilder->pOrSet is defined, then only keep track of the costs
  ** and prereqs.
  */
  if( pBuilder->pOrSet!=0 ){
    if( pTemplate->nLTerm ){
#if WHERETRACE_ENABLED
................................................................................
  int rc = SQLITE_OK;
  WhereLoop *pNew;
  u8 priorJointype = 0;

  /* Loop over the tables in the join, from left to right */
  pNew = pBuilder->pNew;
  whereLoopInit(pNew);

  for(iTab=0, pItem=pTabList->a; pItem<pEnd; iTab++, pItem++){
    Bitmask mUnusable = 0;
    pNew->iTab = iTab;

    pNew->maskSelf = sqlite3WhereGetMask(&pWInfo->sMaskSet, pItem->iCursor);
    if( ((pItem->fg.jointype|priorJointype) & (JT_LEFT|JT_CROSS))!=0 ){
      /* This condition is true when pItem is the FROM clause term on the
      ** right-hand-side of a LEFT or CROSS JOIN.  */
      mPrereq = mPrior;
    }
    priorJointype = pItem->fg.jointype;
................................................................................
    {
      rc = whereLoopAddBtree(pBuilder, mPrereq);
    }
    if( rc==SQLITE_OK && pBuilder->pWC->hasOr ){
      rc = whereLoopAddOr(pBuilder, mPrereq, mUnusable);
    }
    mPrior |= pNew->maskSelf;
    if( rc || db->mallocFailed ) break;








  }

  whereLoopClear(db, pNew);
  return rc;
}

/*

**    (4)  The template has the same or lower cost than the current loop
*/
static int whereLoopInsert(WhereLoopBuilder *pBuilder, WhereLoop *pTemplate){
  WhereLoop **ppPrev, *p;
  WhereInfo *pWInfo = pBuilder->pWInfo;
  sqlite3 *db = pWInfo->pParse->db;
  int rc;

  /* Stop the search once we hit the query planner search limit */
  if( pBuilder->iPlanLimit==0 ){
    WHERETRACE(0xffffffff,("=== query planner search limit reached ===\n"));
    if( pBuilder->pOrSet ) pBuilder->pOrSet->n = 0;
    return SQLITE_DONE;
  }
  pBuilder->iPlanLimit--;

  /* If pBuilder->pOrSet is defined, then only keep track of the costs
  ** and prereqs.
  */
  if( pBuilder->pOrSet!=0 ){
    if( pTemplate->nLTerm ){
#if WHERETRACE_ENABLED
................................................................................
  int rc = SQLITE_OK;
  WhereLoop *pNew;
  u8 priorJointype = 0;

  /* Loop over the tables in the join, from left to right */
  pNew = pBuilder->pNew;
  whereLoopInit(pNew);
  pBuilder->iPlanLimit = SQLITE_QUERY_PLANNER_LIMIT;
  for(iTab=0, pItem=pTabList->a; pItem<pEnd; iTab++, pItem++){
    Bitmask mUnusable = 0;
    pNew->iTab = iTab;
    pBuilder->iPlanLimit += SQLITE_QUERY_PLANNER_LIMIT_INCR;
    pNew->maskSelf = sqlite3WhereGetMask(&pWInfo->sMaskSet, pItem->iCursor);
    if( ((pItem->fg.jointype|priorJointype) & (JT_LEFT|JT_CROSS))!=0 ){
      /* This condition is true when pItem is the FROM clause term on the
      ** right-hand-side of a LEFT or CROSS JOIN.  */
      mPrereq = mPrior;
    }
    priorJointype = pItem->fg.jointype;
................................................................................
    {
      rc = whereLoopAddBtree(pBuilder, mPrereq);
    }
    if( rc==SQLITE_OK && pBuilder->pWC->hasOr ){
      rc = whereLoopAddOr(pBuilder, mPrereq, mUnusable);
    }
    mPrior |= pNew->maskSelf;
    if( rc || db->mallocFailed ){
      if( rc==SQLITE_DONE ){
        /* We hit the query planner search limit set by iPlanLimit */
        sqlite3_log(SQLITE_WARNING, "abbreviated query algorithm search");
        rc = SQLITE_OK;
      }else{
        break;
      }
    }
  }

  whereLoopClear(db, pNew);
  return rc;
}

/*

  WhereLoop *pNew;          /* Template WhereLoop */
  WhereOrSet *pOrSet;       /* Record best loops here, if not NULL */
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  UnpackedRecord *pRec;     /* Probe for stat4 (if required) */
  int nRecValid;            /* Number of valid fields currently in pRec */
#endif
  unsigned int bldFlags;    /* SQLITE_BLDF_* flags */

};

/* Allowed values for WhereLoopBuider.bldFlags */
#define SQLITE_BLDF_INDEXED  0x0001   /* An index is used */
#define SQLITE_BLDF_UNIQUE   0x0002   /* All keys of a UNIQUE index used */





















/*
** The WHERE clause processing routine has two halves.  The
** first part does the start of the WHERE loop and the second
** half does the tail of the WHERE loop.  An instance of
** this structure is returned by the first half and passed
** into the second half to give some continuity.

  WhereLoop *pNew;          /* Template WhereLoop */
  WhereOrSet *pOrSet;       /* Record best loops here, if not NULL */
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  UnpackedRecord *pRec;     /* Probe for stat4 (if required) */
  int nRecValid;            /* Number of valid fields currently in pRec */
#endif
  unsigned int bldFlags;    /* SQLITE_BLDF_* flags */
  unsigned int iPlanLimit;  /* Search limiter */
};

/* Allowed values for WhereLoopBuider.bldFlags */
#define SQLITE_BLDF_INDEXED  0x0001   /* An index is used */
#define SQLITE_BLDF_UNIQUE   0x0002   /* All keys of a UNIQUE index used */

/* The WhereLoopBuilder.iPlanLimit is used to limit the number of
** index+constraint combinations the query planner will consider for a
** particular query.  If this parameter is unlimited, then certain
** pathological queries can spend excess time in the sqlite3WhereBegin()
** routine.  The limit is high enough that is should not impact real-world
** queries.
**
** SQLITE_QUERY_PLANNER_LIMIT is the baseline limit.  The limit is
** increased by SQLITE_QUERY_PLANNER_LIMIT_INCR before each term of the FROM
** clause is processed, so that every table in a join is guaranteed to be
** able to propose a some index+constraint combinations even if the initial
** baseline limit was exhausted by prior tables of the join.
*/
#ifndef SQLITE_QUERY_PLANNER_LIMIT
# define SQLITE_QUERY_PLANNER_LIMIT 20000
#endif
#ifndef SQLITE_QUERY_PLANNER_LIMIT_INCR
# define SQLITE_QUERY_PLANNER_LIMIT_INCR 1000
#endif

/*
** The WHERE clause processing routine has two halves.  The
** first part does the start of the WHERE loop and the second
** half does the tail of the WHERE loop.  An instance of
** this structure is returned by the first half and passed
** into the second half to give some continuity.

*/
static int whereIndexExprTransNode(Walker *p, Expr *pExpr){
  IdxExprTrans *pX = p->u.pIdxTrans;
  if( sqlite3ExprCompare(0, pExpr, pX->pIdxExpr, pX->iTabCur)==0 ){
    pExpr->op = TK_COLUMN;
    pExpr->iTable = pX->iIdxCur;
    pExpr->iColumn = pX->iIdxCol;
    pExpr->pTab = 0;
    return WRC_Prune;
  }else{
    return WRC_Continue;
  }
}

/*

*/
static int whereIndexExprTransNode(Walker *p, Expr *pExpr){
  IdxExprTrans *pX = p->u.pIdxTrans;
  if( sqlite3ExprCompare(0, pExpr, pX->pIdxExpr, pX->iTabCur)==0 ){
    pExpr->op = TK_COLUMN;
    pExpr->iTable = pX->iIdxCur;
    pExpr->iColumn = pX->iIdxCol;
    pExpr->y.pTab = 0;
    return WRC_Prune;
  }else{
    return WRC_Continue;
  }
}

/*

        */
        if( sqlite3Isdigit(zNew[0])
         || zNew[0]=='-'
         || (zNew[0]+1=='0' && iTo==1)
        ){
          if( pLeft->op!=TK_COLUMN 
           || sqlite3ExprAffinity(pLeft)!=SQLITE_AFF_TEXT 
           || IsVirtual(pLeft->pTab)  /* Value might be numeric */
          ){
            sqlite3ExprDelete(db, pPrefix);
            sqlite3ValueFree(pVal);
            return 0;
          }
        }
      }
................................................................................
    ** virtual table on their second argument, which is the same as
    ** the left-hand side operand in their in-fix form.
    **
    **       vtab_column MATCH expression
    **       MATCH(expression,vtab_column)
    */
    pCol = pList->a[1].pExpr;
    if( pCol->op==TK_COLUMN && IsVirtual(pCol->pTab) ){
      for(i=0; i<ArraySize(aOp); i++){
        if( sqlite3StrICmp(pExpr->u.zToken, aOp[i].zOp)==0 ){
          *peOp2 = aOp[i].eOp2;
          *ppRight = pList->a[0].pExpr;
          *ppLeft = pCol;
          return 1;
        }
................................................................................
    **      OVERLOADED(vtab_column,expression)
    **
    ** Historically, xFindFunction expected to see lower-case function
    ** names.  But for this use case, xFindFunction is expected to deal
    ** with function names in an arbitrary case.
    */
    pCol = pList->a[0].pExpr;
    if( pCol->op==TK_COLUMN && IsVirtual(pCol->pTab) ){
      sqlite3_vtab *pVtab;
      sqlite3_module *pMod;
      void (*xNotUsed)(sqlite3_context*,int,sqlite3_value**);
      void *pNotUsed;
      pVtab = sqlite3GetVTable(db, pCol->pTab)->pVtab;
      assert( pVtab!=0 );
      assert( pVtab->pModule!=0 );
      pMod = (sqlite3_module *)pVtab->pModule;
      if( pMod->xFindFunction!=0 ){
        i = pMod->xFindFunction(pVtab,2, pExpr->u.zToken, &xNotUsed, &pNotUsed);
        if( i>=SQLITE_INDEX_CONSTRAINT_FUNCTION ){
          *peOp2 = i;
................................................................................
        }
      }
    }
  }else if( pExpr->op==TK_NE || pExpr->op==TK_ISNOT || pExpr->op==TK_NOTNULL ){
    int res = 0;
    Expr *pLeft = pExpr->pLeft;
    Expr *pRight = pExpr->pRight;
    if( pLeft->op==TK_COLUMN && IsVirtual(pLeft->pTab) ){
      res++;
    }
    if( pRight && pRight->op==TK_COLUMN && IsVirtual(pRight->pTab) ){
      res++;
      SWAP(Expr*, pLeft, pRight);
    }
    *ppLeft = pLeft;
    *ppRight = pRight;
    if( pExpr->op==TK_NE ) *peOp2 = SQLITE_INDEX_CONSTRAINT_NE;
    if( pExpr->op==TK_ISNOT ) *peOp2 = SQLITE_INDEX_CONSTRAINT_ISNOT;
................................................................................
                      pTab->zName, j);
      return;
    }
    pColRef = sqlite3ExprAlloc(pParse->db, TK_COLUMN, 0, 0);
    if( pColRef==0 ) return;
    pColRef->iTable = pItem->iCursor;
    pColRef->iColumn = k++;
    pColRef->pTab = pTab;
    pTerm = sqlite3PExpr(pParse, TK_EQ, pColRef,
                         sqlite3ExprDup(pParse->db, pArgs->a[j].pExpr, 0));
    whereClauseInsert(pWC, pTerm, TERM_DYNAMIC);
  }
}

        */
        if( sqlite3Isdigit(zNew[0])
         || zNew[0]=='-'
         || (zNew[0]+1=='0' && iTo==1)
        ){
          if( pLeft->op!=TK_COLUMN 
           || sqlite3ExprAffinity(pLeft)!=SQLITE_AFF_TEXT 
           || IsVirtual(pLeft->y.pTab)  /* Value might be numeric */
          ){
            sqlite3ExprDelete(db, pPrefix);
            sqlite3ValueFree(pVal);
            return 0;
          }
        }
      }
................................................................................
    ** virtual table on their second argument, which is the same as
    ** the left-hand side operand in their in-fix form.
    **
    **       vtab_column MATCH expression
    **       MATCH(expression,vtab_column)
    */
    pCol = pList->a[1].pExpr;
    if( pCol->op==TK_COLUMN && IsVirtual(pCol->y.pTab) ){
      for(i=0; i<ArraySize(aOp); i++){
        if( sqlite3StrICmp(pExpr->u.zToken, aOp[i].zOp)==0 ){
          *peOp2 = aOp[i].eOp2;
          *ppRight = pList->a[0].pExpr;
          *ppLeft = pCol;
          return 1;
        }
................................................................................
    **      OVERLOADED(vtab_column,expression)
    **
    ** Historically, xFindFunction expected to see lower-case function
    ** names.  But for this use case, xFindFunction is expected to deal
    ** with function names in an arbitrary case.
    */
    pCol = pList->a[0].pExpr;
    if( pCol->op==TK_COLUMN && IsVirtual(pCol->y.pTab) ){
      sqlite3_vtab *pVtab;
      sqlite3_module *pMod;
      void (*xNotUsed)(sqlite3_context*,int,sqlite3_value**);
      void *pNotUsed;
      pVtab = sqlite3GetVTable(db, pCol->y.pTab)->pVtab;
      assert( pVtab!=0 );
      assert( pVtab->pModule!=0 );
      pMod = (sqlite3_module *)pVtab->pModule;
      if( pMod->xFindFunction!=0 ){
        i = pMod->xFindFunction(pVtab,2, pExpr->u.zToken, &xNotUsed, &pNotUsed);
        if( i>=SQLITE_INDEX_CONSTRAINT_FUNCTION ){
          *peOp2 = i;
................................................................................
        }
      }
    }
  }else if( pExpr->op==TK_NE || pExpr->op==TK_ISNOT || pExpr->op==TK_NOTNULL ){
    int res = 0;
    Expr *pLeft = pExpr->pLeft;
    Expr *pRight = pExpr->pRight;
    if( pLeft->op==TK_COLUMN && IsVirtual(pLeft->y.pTab) ){
      res++;
    }
    if( pRight && pRight->op==TK_COLUMN && IsVirtual(pRight->y.pTab) ){
      res++;
      SWAP(Expr*, pLeft, pRight);
    }
    *ppLeft = pLeft;
    *ppRight = pRight;
    if( pExpr->op==TK_NE ) *peOp2 = SQLITE_INDEX_CONSTRAINT_NE;
    if( pExpr->op==TK_ISNOT ) *peOp2 = SQLITE_INDEX_CONSTRAINT_ISNOT;
................................................................................
                      pTab->zName, j);
      return;
    }
    pColRef = sqlite3ExprAlloc(pParse->db, TK_COLUMN, 0, 0);
    if( pColRef==0 ) return;
    pColRef->iTable = pItem->iCursor;
    pColRef->iColumn = k++;
    pColRef->y.pTab = pTab;
    pTerm = sqlite3PExpr(pParse, TK_EQ, pColRef,
                         sqlite3ExprDup(pParse->db, pArgs->a[j].pExpr, 0));
    whereClauseInsert(pWC, pTerm, TERM_DYNAMIC);
  }
}

      if( i==nSrc ) return WRC_Continue;
    }
  }

  switch( pExpr->op ){

    case TK_FUNCTION:
      if( pExpr->pWin==0 ){
        break;
      }else{
        Window *pWin;
        for(pWin=p->pWin; pWin; pWin=pWin->pNextWin){
          if( pExpr->pWin==pWin ){
            assert( pWin->pOwner==pExpr );
            return WRC_Prune;
          }
        }
      }
      /* Fall through.  */

................................................................................
}

/*
** Attach window object pWin to expression p.
*/
void sqlite3WindowAttach(Parse *pParse, Expr *p, Window *pWin){
  if( p ){

    /* This routine is only called for the parser.  If pWin was not
    ** allocated due to an OOM, then the parser would fail before ever
    ** invoking this routine */
    if( ALWAYS(pWin) ){
      p->pWin = pWin;

      pWin->pOwner = p;
      if( p->flags & EP_Distinct ){
        sqlite3ErrorMsg(pParse,
           "DISTINCT is not supported for window functions");
      }
    }
  }else{
................................................................................
/*
** Allocate and return a duplicate of the Window object indicated by the
** third argument. Set the Window.pOwner field of the new object to
** pOwner.
*/
Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p){
  Window *pNew = 0;
  if( p ){
    pNew = sqlite3DbMallocZero(db, sizeof(Window));
    if( pNew ){
      pNew->zName = sqlite3DbStrDup(db, p->zName);
      pNew->pFilter = sqlite3ExprDup(db, p->pFilter, 0);
      pNew->pPartition = sqlite3ExprListDup(db, p->pPartition, 0);
      pNew->pOrderBy = sqlite3ExprListDup(db, p->pOrderBy, 0);
      pNew->eType = p->eType;

      if( i==nSrc ) return WRC_Continue;
    }
  }

  switch( pExpr->op ){

    case TK_FUNCTION:
      if( !ExprHasProperty(pExpr, EP_WinFunc) ){
        break;
      }else{
        Window *pWin;
        for(pWin=p->pWin; pWin; pWin=pWin->pNextWin){
          if( pExpr->y.pWin==pWin ){
            assert( pWin->pOwner==pExpr );
            return WRC_Prune;
          }
        }
      }
      /* Fall through.  */

................................................................................
}

/*
** Attach window object pWin to expression p.
*/
void sqlite3WindowAttach(Parse *pParse, Expr *p, Window *pWin){
  if( p ){
    assert( p->op==TK_FUNCTION );
    /* This routine is only called for the parser.  If pWin was not
    ** allocated due to an OOM, then the parser would fail before ever
    ** invoking this routine */
    if( ALWAYS(pWin) ){
      p->y.pWin = pWin;
      ExprSetProperty(p, EP_WinFunc);
      pWin->pOwner = p;
      if( p->flags & EP_Distinct ){
        sqlite3ErrorMsg(pParse,
           "DISTINCT is not supported for window functions");
      }
    }
  }else{
................................................................................
/*
** Allocate and return a duplicate of the Window object indicated by the
** third argument. Set the Window.pOwner field of the new object to
** pOwner.
*/
Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p){
  Window *pNew = 0;
  if( ALWAYS(p) ){
    pNew = sqlite3DbMallocZero(db, sizeof(Window));
    if( pNew ){
      pNew->zName = sqlite3DbStrDup(db, p->zName);
      pNew->pFilter = sqlite3ExprDup(db, p->pFilter, 0);
      pNew->pPartition = sqlite3ExprListDup(db, p->pPartition, 0);
      pNew->pOrderBy = sqlite3ExprListDup(db, p->pOrderBy, 0);
      pNew->eType = p->eType;

  SELECT * FROM t16a ORDER BY a;
} {abc 1.25 99 xyzzy cba 5.5 98 fizzle}
do_execsql_test alter-16.2 {
  ALTER TABLE t16a RENAME TO t16a_rn;
  SELECT * FROM t16a_rn ORDER BY a;
} {abc 1.25 99 xyzzy cba 5.5 98 fizzle}

finish_test

  SELECT * FROM t16a ORDER BY a;
} {abc 1.25 99 xyzzy cba 5.5 98 fizzle}
do_execsql_test alter-16.2 {
  ALTER TABLE t16a RENAME TO t16a_rn;
  SELECT * FROM t16a_rn ORDER BY a;
} {abc 1.25 99 xyzzy cba 5.5 98 fizzle}

# 2018-09-16 ticket b41031ea2b5372378cb3d2d43cf9fe2a4a5c2510
#
ifcapable rtree {
  db close
  sqlite3 db :memory:
  do_execsql_test alter-17.100 {
    CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
    CREATE VIRTUAL TABLE t2 USING rtree(id,x0,x1);
    INSERT INTO t1 VALUES(1,'apple'),(2,'fig'),(3,'pear');
    INSERT INTO t2 VALUES(1,1.0,2.0),(2,2.0,3.0),(3,1.5,3.5);
    CREATE TRIGGER r1 AFTER UPDATE ON t1 BEGIN
      DELETE FROM t2 WHERE id = OLD.a;
    END;
    ALTER TABLE t1 RENAME TO t3;
    UPDATE t3 SET b='peach' WHERE a=2;
    SELECT * FROM t2 ORDER BY 1;
  } {1 1.0 2.0 3 1.5 3.5}
}

finish_test

  return
}
set testprefix alterauth

set ::auth [list]
proc xAuth {type args} {
  if {$type == "SQLITE_ALTER_TABLE"} {
    lappend ::auth [concat $type $args]
  }
  return SQLITE_OK
}
db auth xAuth

do_execsql_test 1.0 { CREATE TABLE t1(a, b, c); }

  return
}
set testprefix alterauth

set ::auth [list]
proc xAuth {type args} {
  if {$type == "SQLITE_ALTER_TABLE"} {
    lappend ::auth [concat $type [lrange $args 0 3]]
  }
  return SQLITE_OK
}
db auth xAuth

do_execsql_test 1.0 { CREATE TABLE t1(a, b, c); }

# 2018 October 6
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#*************************************************************************
#

set testdir [file dirname $argv0]

source $testdir/tester.tcl

# If SQLITE_OMIT_ALTERTABLE is defined, omit this file.
ifcapable !altertable {
  finish_test
  return
}
set testprefix alterauth2

set ::auth [list]
proc xAuth {type args} {
  lappend ::auth [concat $type [lrange $args 0 3]]
  if {$type=="SQLITE_READ" && [lindex $args 0] == "t2"} breakpoint
  return SQLITE_OK
}
db auth xAuth

proc do_auth_test {tn sql authcode} {
  set script "
    set ::auth \[list\]
    execsql {$sql}
    lsort -unique \[set ::auth\]
  "

  set normal [list {*}$authcode]
  uplevel [list do_test $tn $script $normal]
}

do_execsql_test 1.0 { 
  CREATE TABLE t1(a, b, c); 
  CREATE VIEW v1 AS SELECT * FROM t1;
  CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
    DELETE FROM t1 WHERE a<new.a;
  END;

  CREATE TEMP TRIGGER tr2 AFTER UPDATE OF a, b ON t1 BEGIN
    UPDATE t1 SET a=a+1 WHERE new.b<b;
  END;
}

do_auth_test 1.1 {
  ALTER TABLE t1 RENAME TO t2;
} {
    {SQLITE_ALTER_TABLE main t1 {} {}} 
    {SQLITE_FUNCTION {} like {} {}} 
  {SQLITE_FUNCTION {} sqlite_rename_table {} {}} 
  {SQLITE_FUNCTION {} sqlite_rename_test {} {}} 
    {SQLITE_FUNCTION {} substr {} {}} 
    {SQLITE_READ sqlite_master name main {}} 
    {SQLITE_READ sqlite_master sql main {}} 
    {SQLITE_READ sqlite_master tbl_name main {}} 
    {SQLITE_READ sqlite_master type main {}} 
  {SQLITE_READ sqlite_temp_master name temp {}} 
  {SQLITE_READ sqlite_temp_master sql temp {}} 
  {SQLITE_READ sqlite_temp_master tbl_name temp {}} 
  {SQLITE_READ sqlite_temp_master type temp {}} 
  {SQLITE_SELECT {} {} {} {}} 
    {SQLITE_UPDATE sqlite_master name main {}} 
    {SQLITE_UPDATE sqlite_master sql main {}} 
    {SQLITE_UPDATE sqlite_master tbl_name main {}} 
  {SQLITE_UPDATE sqlite_temp_master sql temp {}} 
  {SQLITE_UPDATE sqlite_temp_master tbl_name temp {}}
}

do_auth_test 1.2 {
  ALTER TABLE t2 RENAME a TO aaa;
} {
  {SQLITE_ALTER_TABLE main t2 {} {}} 
  {SQLITE_FUNCTION {} like {} {}} 
  {SQLITE_FUNCTION {} sqlite_rename_column {} {}} 
  {SQLITE_FUNCTION {} sqlite_rename_test {} {}} 
  {SQLITE_READ sqlite_master name main {}} 
  {SQLITE_READ sqlite_master sql main {}} 
  {SQLITE_READ sqlite_master tbl_name main {}} 
  {SQLITE_READ sqlite_master type main {}} 
  {SQLITE_READ sqlite_temp_master name temp {}} 
  {SQLITE_READ sqlite_temp_master sql temp {}} 
  {SQLITE_READ sqlite_temp_master type temp {}} 
  {SQLITE_SELECT {} {} {} {}} 
  {SQLITE_UPDATE sqlite_master sql main {}} 
  {SQLITE_UPDATE sqlite_temp_master sql temp {}}
}

finish_test

# 2018 September 20
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#*************************************************************************
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix alterlegacy

# If SQLITE_OMIT_ALTERTABLE is defined, omit this file.
ifcapable !altertable {
  finish_test
  return
}

do_execsql_test 1.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t1(a, b, CHECK(t1.a != t1.b));
  CREATE TABLE t2(a, b);
  CREATE INDEX t2expr ON t2(a) WHERE t2.b>0;
}

do_execsql_test 1.1 {
  SELECT sql FROM sqlite_master
} {
  {CREATE TABLE t1(a, b, CHECK(t1.a != t1.b))}
  {CREATE TABLE t2(a, b)}
  {CREATE INDEX t2expr ON t2(a) WHERE t2.b>0}
}

# Legacy behavior is to corrupt the schema in this case, as the table name in
# the CHECK constraint is incorrect after "t1" is renamed. This version is
# slightly different - it rejects the change and rolls back the transaction.
do_catchsql_test 1.2 {
  ALTER TABLE t1 RENAME TO t1new;
} {1 {no such column: t1.a}}

do_execsql_test 1.3 {
  CREATE TABLE t3(c, d);
  ALTER TABLE t3 RENAME TO t3new;
  DROP TABLE t3new;
}

do_execsql_test 1.4 {
  SELECT sql FROM sqlite_master
} {
  {CREATE TABLE t1(a, b, CHECK(t1.a != t1.b))}
  {CREATE TABLE t2(a, b)}
  {CREATE INDEX t2expr ON t2(a) WHERE t2.b>0}
}


do_catchsql_test 1.3 {
  ALTER TABLE t2 RENAME TO t2new;
} {1 {no such column: t2.b}}
do_execsql_test 1.4 {
  SELECT sql FROM sqlite_master
} {
  {CREATE TABLE t1(a, b, CHECK(t1.a != t1.b))}
  {CREATE TABLE t2(a, b)}
  {CREATE INDEX t2expr ON t2(a) WHERE t2.b>0}
}


#-------------------------------------------------------------------------
reset_db
ifcapable vtab {
  register_echo_module db

  do_execsql_test 2.0 {
    PRAGMA legacy_alter_table = 1;
    CREATE TABLE abc(a, b, c);
    INSERT INTO abc VALUES(1, 2, 3);
    CREATE VIRTUAL TABLE eee USING echo('abc');
    SELECT * FROM eee;
  } {1 2 3}

  do_execsql_test 2.1 {
    ALTER TABLE eee RENAME TO fff;
    SELECT * FROM fff;
  } {1 2 3}

  db close
  sqlite3 db test.db

  do_catchsql_test 2.2 {
    ALTER TABLE fff RENAME TO ggg;
  } {1 {no such module: echo}}
}

#-------------------------------------------------------------------------
reset_db

do_execsql_test 3.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE txx(a, b, c);
  INSERT INTO txx VALUES(1, 2, 3);
  CREATE VIEW vvv AS SELECT main.txx.a, txx.b, c FROM txx;
  CREATE VIEW uuu AS SELECT main.one.a, one.b, c FROM txx AS one;
  CREATE VIEW temp.ttt AS SELECT main.txx.a, txx.b, one.b, main.one.a FROM txx AS one, txx;
}

do_execsql_test 3.1.1 {
  SELECT * FROM vvv;
} {1 2 3}
do_execsql_test 3.1.2a {
  ALTER TABLE txx RENAME TO "t xx";
}
do_catchsql_test 3.1.2b {
  SELECT * FROM vvv;
} {1 {no such table: main.txx}}
do_execsql_test 3.1.3 {
  SELECT sql FROM sqlite_master WHERE name='vvv';
} {{CREATE VIEW vvv AS SELECT main.txx.a, txx.b, c FROM txx}}


do_catchsql_test 3.2.1 {
  SELECT * FROM uuu;
} {1 {no such table: main.txx}}
do_execsql_test 3.2.2 {
  SELECT sql FROM sqlite_master WHERE name='uuu';;
} {{CREATE VIEW uuu AS SELECT main.one.a, one.b, c FROM txx AS one}}

do_catchsql_test 3.3.1 {
  SELECT * FROM ttt;
} {1 {no such table: txx}}
do_execsql_test 3.3.2 {
  SELECT sql FROM sqlite_temp_master WHERE name='ttt';
} {{CREATE VIEW ttt AS SELECT main.txx.a, txx.b, one.b, main.one.a FROM txx AS one, txx}}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 4.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE table t1(x, y);
  CREATE table t2(a, b);

  CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
    SELECT t1.x, * FROM t1, t2;
    INSERT INTO t2 VALUES(new.x, new.y);
  END;
}

do_execsql_test 4.1 {
  INSERT INTO t1 VALUES(1, 1);
  ALTER TABLE t1 RENAME TO t11;
} 
do_catchsql_test 4.1a {
  INSERT INTO t11 VALUES(2, 2);
} {1 {no such table: main.t1}}
do_execsql_test 4.1b {
  ALTER TABLE t11 RENAME TO t1;
  ALTER TABLE t2 RENAME TO t22;
}
do_catchsql_test 4.1c {
  INSERT INTO t1 VALUES(3, 3);
} {1 {no such table: main.t2}}

proc squish {a} {
  string trim [regsub -all {[[:space:]][[:space:]]*} $a { }]
}
db func squish squish
do_test 4.2 {
  execsql { SELECT squish(sql) FROM sqlite_master WHERE name = 'tr1' }
} [list [squish {
  CREATE TRIGGER tr1 AFTER INSERT ON "t1" BEGIN
    SELECT t1.x, * FROM t1, t2;
    INSERT INTO t2 VALUES(new.x, new.y);
  END
}]]

#-------------------------------------------------------------------------
reset_db
do_execsql_test 5.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t9(a, b, c);
  CREATE TABLE t10(a, b, c);
  CREATE TEMP TABLE t9(a, b, c);

  CREATE TRIGGER temp.t9t AFTER INSERT ON temp.t9 BEGIN
    INSERT INTO t10 VALUES(new.a, new.b, new.c);
  END;

  INSERT INTO temp.t9 VALUES(1, 2, 3);
  SELECT * FROM t10;
} {1 2 3}

do_execsql_test 5.1 {
  ALTER TABLE temp.t9 RENAME TO 't1234567890'
}

do_execsql_test 5.2 {
  CREATE TABLE t1(a, b);
  CREATE TABLE t2(a, b);
  INSERT INTO t1 VALUES(1, 2);
  INSERT INTO t2 VALUES(3, 4);
  CREATE VIEW v AS SELECT one.a, one.b, t2.a, t2.b FROM t1 AS one, t2;
  SELECT * FROM v;
} {1 2 3 4}

do_execsql_test 5.3 {
  ALTER TABLE t2 RENAME TO one;
} {}

do_catchsql_test 5.4 {
  SELECT  *  FROM v
} {1 {no such table: main.t2}}

do_execsql_test 5.5 {
  ALTER TABLE one RENAME TO t2;
  DROP VIEW v;
  CREATE VIEW temp.vv AS SELECT one.a, one.b, t2.a, t2.b FROM t1 AS one, t2;
  SELECT * FROM vv;
} {1 2 3 4}

do_execsql_test 5.6 {
  ALTER TABLE t2 RENAME TO one;
} {}
do_catchsql_test 5.7 {
  SELECT  *  FROM vv
} {1 {no such table: t2}}

#-------------------------------------------------------------------------

ifcapable vtab {
  register_tcl_module db
  proc tcl_command {method args} {
    switch -- $method {
      xConnect {
        return "CREATE TABLE t1(a, b, c)"
      }
    }
    return {}
  }
  
  do_execsql_test 6.0 {
    CREATE VIRTUAL TABLE x1 USING tcl(tcl_command);
  }
  
  do_execsql_test 6.1 {
    ALTER TABLE x1 RENAME TO x2;
    SELECT sql FROM sqlite_master WHERE name = 'x2'
  } {{CREATE VIRTUAL TABLE "x2" USING tcl(tcl_command)}}
  
  do_execsql_test 7.1 {
    CREATE TABLE ddd(db, sql, zOld, zNew, bTemp);
    INSERT INTO ddd VALUES(
        'main', 'CREATE TABLE x1(i INTEGER, t TEXT)', 'ddd', NULL, 0
    ), (
        'main', 'CREATE TABLE x1(i INTEGER, t TEXT)', NULL, 'eee', 0
    ), (
        'main', NULL, 'ddd', 'eee', 0
    );
  } {}
}

#-------------------------------------------------------------------------
#
reset_db
forcedelete test.db2
do_execsql_test 8.1 {
  PRAGMA legacy_alter_table = 1;
  ATTACH 'test.db2' AS aux;
  PRAGMA foreign_keys = on;
  CREATE TABLE aux.p1(a INTEGER PRIMARY KEY, b);
  CREATE TABLE aux.c1(x INTEGER PRIMARY KEY, y REFERENCES p1(a));
  INSERT INTO aux.p1 VALUES(1, 1);
  INSERT INTO aux.p1 VALUES(2, 2);
  INSERT INTO aux.c1 VALUES(NULL, 2);
  CREATE TABLE aux.c2(x INTEGER PRIMARY KEY, y REFERENCES c1(a));
}

do_execsql_test 8.2 {
  ALTER TABLE aux.p1 RENAME TO ppp;
}

do_execsql_test 8.2 {
  INSERT INTO aux.c1 VALUES(NULL, 1);
  SELECT sql FROM aux.sqlite_master WHERE name = 'c1';
} {{CREATE TABLE c1(x INTEGER PRIMARY KEY, y REFERENCES "ppp"(a))}}

reset_db
do_execsql_test 9.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t1(a, b, c);
  CREATE VIEW v1 AS SELECT * FROM t2;
}
do_execsql_test 9.1 {
  ALTER TABLE t1 RENAME TO t3;
} {}
do_execsql_test 9.1b {
  ALTER TABLE t3 RENAME TO t1;
} {}
do_execsql_test 9.2 {
  DROP VIEW v1;
  CREATE TRIGGER tr AFTER INSERT ON t1 BEGIN
    INSERT INTO t2 VALUES(new.a);
  END;
}
do_execsql_test 9.3 {
  ALTER TABLE t1 RENAME TO t3;
} {}

forcedelete test.db2
do_execsql_test 9.4 {
  ALTER TABLE t3 RENAME TO t1;
  DROP TRIGGER tr;

  ATTACH 'test.db2' AS aux;
  CREATE TRIGGER tr AFTER INSERT ON t1 WHEN new.a IS NULL BEGIN SELECT 1, 2, 3; END;

  CREATE TABLE aux.t1(x);
  CREATE TEMP TRIGGER tr AFTER INSERT ON aux.t1 BEGIN SELECT 1, 2, 3; END;
}
do_execsql_test 9.5 {
  ALTER TABLE main.t1 RENAME TO t3;
}
do_execsql_test 9.6 {
  SELECT sql FROM sqlite_temp_master;
  SELECT sql FROM sqlite_master WHERE type='trigger';
} {
  {CREATE TRIGGER tr AFTER INSERT ON aux.t1 BEGIN SELECT 1, 2, 3; END}
  {CREATE TRIGGER tr AFTER INSERT ON "t3" WHEN new.a IS NULL BEGIN SELECT 1, 2, 3; END}
}

#-------------------------------------------------------------------------
reset_db
ifcapable fts5 {
  do_execsql_test 10.0 {
    PRAGMA legacy_alter_table = 1;
    CREATE VIRTUAL TABLE fff USING fts5(x, y, z);
  }

  do_execsql_test 10.1 {
    BEGIN;
      INSERT INTO fff VALUES('a', 'b', 'c');
      ALTER TABLE fff RENAME TO ggg;
    COMMIT;
  }

  do_execsql_test 10.2 {
    SELECT * FROM ggg;
  } {a b c}
}

#-------------------------------------------------------------------------
reset_db
forcedelete test.db2
db func trigger trigger
set ::trigger [list]
proc trigger {args} {
  lappend ::trigger $args
}
do_execsql_test 11.0 {
  PRAGMA legacy_alter_table = 1;
  ATTACH 'test.db2' AS aux;
  CREATE TABLE aux.t1(a, b, c);
  CREATE TABLE main.t1(a, b, c);
  CREATE TEMP TRIGGER tr AFTER INSERT ON aux.t1 BEGIN
    SELECT trigger(new.a, new.b, new.c);
  END;
}

do_execsql_test 11.1 {
  INSERT INTO main.t1 VALUES(1, 2, 3);
  INSERT INTO aux.t1 VALUES(4, 5, 6);
}
do_test 11.2 { set ::trigger } {{4 5 6}}

do_execsql_test 11.3 {
  SELECT name, tbl_name FROM sqlite_temp_master;
} {tr t1}

do_execsql_test 11.4 {
  ALTER TABLE main.t1 RENAME TO t2;
  SELECT name, tbl_name FROM sqlite_temp_master;
} {tr t1}

do_execsql_test 11.5 {
  ALTER TABLE aux.t1 RENAME TO t2;
  SELECT name, tbl_name FROM sqlite_temp_master;
} {tr t2}

do_execsql_test 11.6 {
  INSERT INTO aux.t2 VALUES(7, 8, 9);
}
do_test 11.7 { set ::trigger } {{4 5 6} {7 8 9}}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 12.0 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t1(a);
  CREATE TABLE t2(w);
  CREATE TRIGGER temp.r1 AFTER INSERT ON main.t2 BEGIN
    INSERT INTO t1(a) VALUES(new.w);
  END;
  CREATE TEMP TABLE t2(x);
}

do_execsql_test 12.1 {
  ALTER TABLE main.t2 RENAME TO t3;
}

do_execsql_test 12.2 {
  INSERT INTO t3 VALUES('WWW');
  SELECT * FROM t1;
} {WWW}


#-------------------------------------------------------------------------
reset_db

ifcapable rtree {
  do_execsql_test 14.0 {
    PRAGMA legacy_alter_table = 1;
    CREATE VIRTUAL TABLE rt USING rtree(id, minx, maxx, miny, maxy);

    CREATE TABLE "mytable" ( "fid" INTEGER PRIMARY KEY, "geom" BLOB);

    CREATE TRIGGER tr1 AFTER UPDATE OF "geom" ON "mytable" 
          WHEN OLD."fid" = NEW."fid" AND NEW."geom" IS NULL BEGIN 
      DELETE FROM rt WHERE id = OLD."fid"; 
    END;

    INSERT INTO mytable VALUES(1, X'abcd');
  }

  do_execsql_test 14.1 {
    UPDATE mytable SET geom = X'1234'
  }

  do_execsql_test 14.2 {
    ALTER TABLE mytable RENAME TO mytable_renamed;
  }

  do_execsql_test 14.3 {
    CREATE TRIGGER tr2 AFTER INSERT ON mytable_renamed BEGIN
      DELETE FROM rt WHERE id=(SELECT min(id) FROM rt);
    END;
  }

  do_execsql_test 14.4 {
    ALTER TABLE mytable_renamed RENAME TO mytable2;
  }
}

reset_db
do_execsql_test 14.5 {
  PRAGMA legacy_alter_table = 1;
  CREATE TABLE t1(a, b, c);
  CREATE VIEW v1 AS SELECT * FROM t1;
  CREATE TRIGGER xyz AFTER INSERT ON t1 BEGIN
    SELECT a, b FROM v1;
  END;
}
do_execsql_test 14.6 {
  ALTER TABLE t1 RENAME TO tt1;
}


finish_test

# $Id: altermalloc.test,v 1.10 2008/10/30 17:21:13 danielk1977 Exp $
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# If SQLITE_OMIT_ALTERTABLE is defined, omit this file.
ifcapable !altertable||!memdebug {
  finish_test
  return
}

source $testdir/malloc_common.tcl

do_malloc_test altermalloc-1 -tclprep {

# $Id: altermalloc.test,v 1.10 2008/10/30 17:21:13 danielk1977 Exp $
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# If SQLITE_OMIT_ALTERTABLE is defined, omit this file.
ifcapable !altertable {
  finish_test
  return
}

source $testdir/malloc_common.tcl

do_malloc_test altermalloc-1 -tclprep {

} -body {
  execsql {
    ALTER TABLE t1 RENAME abcd TO dcba
  }
} -test {
  faultsim_test_result {0 {}}
}


























finish_test

} -body {
  execsql {
    ALTER TABLE t1 RENAME abcd TO dcba
  }
} -test {
  faultsim_test_result {0 {}}
}

reset_db
do_execsql_test 4.0 {
  CREATE TABLE rr(a, b);
  CREATE VIEW vv AS SELECT * FROM rr;

  CREATE TRIGGER vv1 INSTEAD OF INSERT ON vv BEGIN
    SELECT 1, 2, 3;
  END;
  CREATE TRIGGER tr1 AFTER INSERT ON rr BEGIN
    INSERT INTO vv VALUES(new.a, new.b);
  END;
} {}

faultsim_save_and_close
do_faultsim_test 4 -faults oom-* -prep {
  faultsim_restore_and_reopen
  execsql { SELECT * FROM sqlite_master }
} -body {
  execsql {
    ALTER TABLE rr RENAME a TO c;
  }
} -test {
  faultsim_test_result {0 {}} 
}

finish_test

do_execsql_test 13.1 {
  INSERT INTO t1 VALUES(1, 2);
}

do_catchsql_test 13.2 {
  ALTER TABLE t2 RENAME b TO y;
} {1 {error in trigger tr1 after rename: ambiguous column name: y}}






























































































finish_test

do_execsql_test 13.1 {
  INSERT INTO t1 VALUES(1, 2);
}

do_catchsql_test 13.2 {
  ALTER TABLE t2 RENAME b TO y;
} {1 {error in trigger tr1 after rename: ambiguous column name: y}}

#-------------------------------------------------------------------------
reset_db

ifcapable rtree {
  do_execsql_test 14.0 {
    CREATE VIRTUAL TABLE rt USING rtree(id, minx, maxx, miny, maxy);

    CREATE TABLE "mytable" ( "fid" INTEGER PRIMARY KEY, "geom" BLOB);

    CREATE TRIGGER tr1 AFTER UPDATE OF "geom" ON "mytable" 
          WHEN OLD."fid" = NEW."fid" AND NEW."geom" IS NULL BEGIN 
      DELETE FROM rt WHERE id = OLD."fid"; 
    END;

    INSERT INTO mytable VALUES(1, X'abcd');
  }

  do_execsql_test 14.1 {
    UPDATE mytable SET geom = X'1234'
  }

  do_execsql_test 14.2 {
    ALTER TABLE mytable RENAME TO mytable_renamed;
  }

  do_execsql_test 14.3 {
    CREATE TRIGGER tr2 AFTER INSERT ON mytable_renamed BEGIN
      DELETE FROM rt WHERE id=(SELECT min(id) FROM rt);
    END;
  }

  do_execsql_test 14.4 {
    ALTER TABLE mytable_renamed RENAME TO mytable2;
  }
}

reset_db
do_execsql_test 14.5 {
  CREATE TABLE t1(a, b, c);
  CREATE VIEW v1 AS SELECT * FROM t1;
  CREATE TRIGGER xyz AFTER INSERT ON t1 BEGIN
    SELECT a, b FROM v1;
  END;
}
do_execsql_test 14.6 {
  ALTER TABLE t1 RENAME TO tt1;
}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 15.0 {
  CREATE TABLE t1(a integer NOT NULL PRIMARY KEY);
  CREATE VIEW v1 AS SELECT a FROM t1;
  CREATE TRIGGER tr1 INSTEAD OF INSERT ON v1 BEGIN 
    UPDATE t1 SET a = NEW.a;
  END;
  CREATE TRIGGER tr2 INSTEAD OF INSERT ON v1 BEGIN 
    SELECT new.a;
  END;
  CREATE TABLE t2 (b);
}

do_execsql_test 15.1 {
  INSERT INTO v1 VALUES(1);
  ALTER TABLE t2 RENAME TO t3;
}

do_execsql_test 15.2 {
  CREATE TABLE x(f1 integer NOT NULL);
  CREATE VIEW y AS SELECT f1 AS f1 FROM x;
  CREATE TRIGGER t INSTEAD OF UPDATE OF f1 ON y BEGIN 
    UPDATE x SET f1 = NEW.f1; 
  END;
  CREATE TABLE z (f1 integer NOT NULL PRIMARY KEY);
  ALTER TABLE z RENAME TO z2;
}

do_execsql_test 15.3 {
  INSERT INTO x VALUES(1), (2), (3);
  ALTER TABLE x RENAME f1 TO f2;
  SELECT * FROM x;
} {1 2 3}

do_execsql_test 15.4 {
  UPDATE y SET f1 = 'x' WHERE f1 = 1;
  SELECT * FROM x;
} {x x x}

do_execsql_test 15.5 {
  SELECT sql FROM sqlite_master WHERE name = 'y';
} {{CREATE VIEW y AS SELECT f2 AS f1 FROM x}}


finish_test

# 2018 September 30
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#*************************************************************************
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix altertab

# If SQLITE_OMIT_ALTERTABLE is defined, omit this file.
ifcapable !altertable {
  finish_test
  return
}

ifcapable fts5 {
  do_execsql_test 1.0 {
    CREATE TABLE rr(a, b);
    CREATE VIRTUAL TABLE ff USING fts5(a, b);
    CREATE TRIGGER tr1 AFTER INSERT ON rr BEGIN
      INSERT INTO ff VALUES(new.a, new.b);
    END;
    INSERT INTO rr VALUES('hello', 'world');
    SELECT * FROM ff;
  } {hello world}

  do_execsql_test 1.1 {
    ALTER TABLE ff RENAME TO ffff;
  }

  do_execsql_test 1.2 {
    INSERT INTO rr VALUES('in', 'tcl');
    SELECT * FROM ffff;
  } {hello world in tcl}
}


finish_test

#
# $Id: attachmalloc.test,v 1.10 2008/10/22 10:45:38 danielk1977 Exp $
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !memdebug||!attach {
  finish_test
  return
}

source $testdir/malloc_common.tcl

do_malloc_test attachmalloc-1 -tclprep {

#
# $Id: attachmalloc.test,v 1.10 2008/10/22 10:45:38 danielk1977 Exp $
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !attach {
  finish_test
  return
}

source $testdir/malloc_common.tcl

do_malloc_test attachmalloc-1 -tclprep {

  SQLITE_READ t7 {} {} {}            \
  ]

# Test also that if SQLITE_DENY is returned from an SQLITE_READ authorizer 
# invocation with no column name specified, compilation fails.
#
set ::authargs [list]
proc auth {op a b c d} {

  lappend ::authargs $op $a $b $c $d
  if {$op == "SQLITE_READ"} { return "SQLITE_DENY" }
  return "SQLITE_OK"
}
set ::authargs [list]
do_catchsql_test auth-8.3 {
  SELECT count(*) FROM t7

  SQLITE_READ t7 {} {} {}            \
  ]

# Test also that if SQLITE_DENY is returned from an SQLITE_READ authorizer 
# invocation with no column name specified, compilation fails.
#
set ::authargs [list]
proc auth {op args} {
  foreach {a b c d} $args break
  lappend ::authargs $op $a $b $c $d
  if {$op == "SQLITE_READ"} { return "SQLITE_DENY" }
  return "SQLITE_OK"
}
set ::authargs [list]
do_catchsql_test auth-8.3 {
  SELECT count(*) FROM t7

foreach {code english} $code2english {
  do_test capi3-9.$test_number "sqlite3_test_errstr $code" $english
  incr test_number
}

# Test the error message when a "real" out of memory occurs.
if { [permutation] != "nofaultsim" } {
ifcapable memdebug {
  do_test capi3-10-1 {
    sqlite3 db test.db
    set DB [sqlite3_connection_pointer db]
    sqlite3_memdebug_fail 1
    catchsql {
      select * from sqlite_master;
    }
................................................................................
  ifcapable {utf16} {
    do_test capi3-10-6 {
      utf8 [sqlite3_errmsg16 $::DB]
    } {out of memory}
  }
  db close
  sqlite3_memdebug_fail -1
}
}

# The following tests - capi3-11.* - test that a COMMIT or ROLLBACK
# statement issued while there are still outstanding VMs that are part of
# the transaction fails.
sqlite3 db test.db
set DB [sqlite3_connection_pointer db]

foreach {code english} $code2english {
  do_test capi3-9.$test_number "sqlite3_test_errstr $code" $english
  incr test_number
}

# Test the error message when a "real" out of memory occurs.
if { [permutation] != "nofaultsim" } {

  do_test capi3-10-1 {
    sqlite3 db test.db
    set DB [sqlite3_connection_pointer db]
    sqlite3_memdebug_fail 1
    catchsql {
      select * from sqlite_master;
    }
................................................................................
  ifcapable {utf16} {
    do_test capi3-10-6 {
      utf8 [sqlite3_errmsg16 $::DB]
    } {out of memory}
  }
  db close
  sqlite3_memdebug_fail -1

}

# The following tests - capi3-11.* - test that a COMMIT or ROLLBACK
# statement issued while there are still outstanding VMs that are part of
# the transaction fails.
sqlite3 db test.db
set DB [sqlite3_connection_pointer db]

foreach {code english} $code2english {
  do_test capi3c-9.$test_number "sqlite3_test_errstr $code" $english
  incr test_number
}

# Test the error message when a "real" out of memory occurs.
if { [permutation] != "nofaultsim" } {
ifcapable memdebug {
  do_test capi3c-10-1 {
    sqlite3 db test.db
    set DB [sqlite3_connection_pointer db]
    sqlite3_memdebug_fail 0
    catchsql {
      select * from sqlite_master;
    }
................................................................................
  ifcapable {utf16} {
    do_test capi3c-10-3 {
      utf8 [sqlite3_errmsg16 $::DB]
    } {out of memory}
  }
  db close
  sqlite3_memdebug_fail -1
}
}

# The following tests - capi3c-11.* - test that a COMMIT or ROLLBACK
# statement issued while there are still outstanding VMs that are part of
# the transaction fails.
sqlite3 db test.db
set DB [sqlite3_connection_pointer db]

foreach {code english} $code2english {
  do_test capi3c-9.$test_number "sqlite3_test_errstr $code" $english
  incr test_number
}

# Test the error message when a "real" out of memory occurs.
if { [permutation] != "nofaultsim" } {

  do_test capi3c-10-1 {
    sqlite3 db test.db
    set DB [sqlite3_connection_pointer db]
    sqlite3_memdebug_fail 0
    catchsql {
      select * from sqlite_master;
    }
................................................................................
  ifcapable {utf16} {
    do_test capi3c-10-3 {
      utf8 [sqlite3_errmsg16 $::DB]
    } {out of memory}
  }
  db close
  sqlite3_memdebug_fail -1

}

# The following tests - capi3c-11.* - test that a COMMIT or ROLLBACK
# statement issued while there are still outstanding VMs that are part of
# the transaction fails.
sqlite3 db test.db
set DB [sqlite3_connection_pointer db]

# $Id: crash5.test,v 1.3 2008/07/12 14:52:20 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Only run these tests if memory debugging is turned on.
#
ifcapable !memdebug||!crashtest||!memorymanage {
   puts "Skipping crash5 tests: not compiled with -DSQLITE_MEMDEBUG..."
   finish_test
   return
}

db close

# $Id: crash5.test,v 1.3 2008/07/12 14:52:20 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Only run these tests if memory debugging is turned on.
#
ifcapable !crashtest||!memorymanage {
   puts "Skipping crash5 tests: not compiled with -DSQLITE_MEMDEBUG..."
   finish_test
   return
}

db close

# This file tests malloc failures in concert with fuzzy SQL generation.
#
# $Id: fuzz_malloc.test,v 1.10 2008/08/20 16:35:10 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !memdebug {
  finish_test
  return
}

source $testdir/malloc_common.tcl
source $testdir/fuzz_common.tcl

if {[info exists G(isquick)]} {
  set ::REPEATS 20
} elseif {[info exists G(issoak)]} {
  set ::REPEATS 100

# This file tests malloc failures in concert with fuzzy SQL generation.
#
# $Id: fuzz_malloc.test,v 1.10 2008/08/20 16:35:10 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl






source $testdir/malloc_common.tcl
source $testdir/fuzz_common.tcl

if {[info exists G(isquick)]} {
  set ::REPEATS 20
} elseif {[info exists G(issoak)]} {
  set ::REPEATS 100

# $Id: incrblob_err.test,v 1.14 2008/07/18 17:16:27 drh Exp $
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix incrblob_err

ifcapable {!incrblob  || !memdebug || !tclvar} {
  finish_test
  return
}

source $testdir/malloc_common.tcl

unset -nocomplain ::fd ::data

# $Id: incrblob_err.test,v 1.14 2008/07/18 17:16:27 drh Exp $
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix incrblob_err

ifcapable {!incrblob  || !tclvar} {
  finish_test
  return
}

source $testdir/malloc_common.tcl

unset -nocomplain ::fd ::data

do_execsql_test 3.4.5eqp {
  EXPLAIN QUERY PLAN
  SELECT * FROM t4 ORDER BY Substr(a,-2) COLLATE nocase;
} {/SCAN TABLE t4 USING INDEX i4/}
do_execsql_test 3.4.6 {
  SELECT * FROM t4 ORDER BY Substr(a,-2) COLLATE binary;
} {.ABC1 1 .ABC3 3 .abc2 2 .abc4 4}








































































finish_test

do_execsql_test 3.4.5eqp {
  EXPLAIN QUERY PLAN
  SELECT * FROM t4 ORDER BY Substr(a,-2) COLLATE nocase;
} {/SCAN TABLE t4 USING INDEX i4/}
do_execsql_test 3.4.6 {
  SELECT * FROM t4 ORDER BY Substr(a,-2) COLLATE binary;
} {.ABC1 1 .ABC3 3 .abc2 2 .abc4 4}

# 2014-09-15:  Verify that UPDATEs of columns not referenced by a
# index on expression do not modify the index.
#
unset -nocomplain cnt
set cnt 0
proc refcnt {x} {
  global cnt
  incr cnt
  return $x
}
db close
sqlite3 db :memory:
db function refcnt -deterministic refcnt
do_test 4.100 {
  db eval {
    CREATE TABLE t1(a,b,c,d,e,f);
    CREATE INDEX t1abc ON t1(refcnt(a+b+c));
  }
  set ::cnt
} {0}
do_test 4.110 {
  db eval {INSERT INTO t1 VALUES(1,2,3,4,5,6);}
  set ::cnt
  # The refcnt() function is invoked once to compute the index value 
} {1}
do_test 4.120 {
  set ::cnt 0
  db eval {UPDATE t1 SET b=b+1;}
  set ::cnt
  # The refcnt() function is invoked twice, once to remove the old index
  # entry and a second time to insert the new one.
} {2}
do_test 4.130 {
  set ::cnt 0
  db eval {UPDATE t1 SET d=d+1;}
  set ::cnt
  # Refcnt() should not be invoked because that index does not change.
} {0}

# Additional test cases to show that UPDATE does not modify indexes that
# do not involve unchanged columns.
#
load_static_extension db explain
do_execsql_test 4.200 {
  CREATE TABLE t2(a,b,c,d,e,f);
  INSERT INTO t2 VALUES(2,3,4,5,6,7);
  CREATE INDEX t2abc ON t2(a+b+c);
  CREATE INDEX t2cd ON t2(c*d);
  CREATE INDEX t2def ON t2(d,e+25*f);
  SELECT sqlite_master.name 
    FROM sqlite_master, explain('UPDATE t2 SET b=b+1')
   WHERE explain.opcode LIKE 'Open%'
     AND sqlite_master.rootpage=explain.p2
   ORDER BY 1;
} {t2 t2abc}
do_execsql_test 4.210 {
  SELECT sqlite_master.name 
    FROM sqlite_master, explain('UPDATE t2 SET c=c+1')
   WHERE explain.opcode LIKE 'Open%'
     AND sqlite_master.rootpage=explain.p2
   ORDER BY 1;
} {t2 t2abc t2cd}
do_execsql_test 4.220 {
  SELECT sqlite_master.name 
    FROM sqlite_master, explain('UPDATE t2 SET c=c+1, f=NULL')
   WHERE explain.opcode LIKE 'Open%'
     AND sqlite_master.rootpage=explain.p2
   ORDER BY 1;
} {t2 t2abc t2cd t2def}


finish_test

} {
  QUERY PLAN
  `--SCAN TABLE t5a
}
do_execsql_test like3-5.110 {
  SELECT x FROM t5a WHERE x LIKE '/a%';
} {/abc}

do_eqp_test like3-5.111 {
  SELECT x FROM t5a WHERE x LIKE '/a%';
} {
  QUERY PLAN
  `--SEARCH TABLE t5a USING COVERING INDEX sqlite_autoindex_t5a_1 (x>? AND x<?)

}
do_execsql_test like3-5.120 {
  SELECT x FROM t5a WHERE x LIKE '^12%' ESCAPE '^';
} {123}
do_eqp_test like3-5.121 {
  SELECT x FROM t5a WHERE x LIKE '^12%' ESCAPE '^';
} {

} {
  QUERY PLAN
  `--SCAN TABLE t5a
}
do_execsql_test like3-5.110 {
  SELECT x FROM t5a WHERE x LIKE '/a%';
} {/abc}
ifcapable !icu {
do_eqp_test like3-5.111 {
  SELECT x FROM t5a WHERE x LIKE '/a%';
} {
  QUERY PLAN
  `--SEARCH TABLE t5a USING COVERING INDEX sqlite_autoindex_t5a_1 (x>? AND x<?)
}
}
do_execsql_test like3-5.120 {
  SELECT x FROM t5a WHERE x LIKE '^12%' ESCAPE '^';
} {123}
do_eqp_test like3-5.121 {
  SELECT x FROM t5a WHERE x LIKE '^12%' ESCAPE '^';
} {

  finish_test
  return
}

# The tests in this file configure the lookaside allocator after a 
# connection is opened. This will not work if there is any "presql"
# configured (SQL run within the [sqlite3] wrapper in tester.tcl).
if {[info exists ::G(perm:presql)]} {
  finish_test
  return
}

test_set_config_pagecache 0 0

catch {db close}
sqlite3_shutdown
sqlite3_initialize
autoinstall_test_functions

sqlite3 db test.db


# Make sure sqlite3_db_config() and sqlite3_db_status are working.
#
do_test lookaside-1.1 {
  catch {sqlite3_config_error db}
} {0}

................................................................................
} {0}
do_test lookaside-2.2 {
  db eval {CREATE TABLE t2(x);}
  foreach {x y z} [sqlite3_db_status db DBSTATUS_LOOKASIDE_USED 0] break
  expr {$x==0 && $y<$z && $z>10 && $z<100}
} {1}
do_test lookaside-2.3 {

  sqlite3_db_config_lookaside db 0 50 50
} {5}  ;# SQLITE_BUSY
do_test lookaside-2.4 {
  db cache flush
  sqlite3_db_config_lookaside db 0 50 50
} {0}  ;# SQLITE_OK
do_test lookaside-2.5 {

  finish_test
  return
}

# The tests in this file configure the lookaside allocator after a 
# connection is opened. This will not work if there is any "presql"
# configured (SQL run within the [sqlite3] wrapper in tester.tcl).
if {[info exists ::G(perm:dbconfig)] && $::G(perm:dbconfig)!=""} {
  finish_test
  return
}

test_set_config_pagecache 0 0

catch {db close}
sqlite3_shutdown
sqlite3_initialize
autoinstall_test_functions

sqlite3 db test.db
db cache size 4

# Make sure sqlite3_db_config() and sqlite3_db_status are working.
#
do_test lookaside-1.1 {
  catch {sqlite3_config_error db}
} {0}

................................................................................
} {0}
do_test lookaside-2.2 {
  db eval {CREATE TABLE t2(x);}
  foreach {x y z} [sqlite3_db_status db DBSTATUS_LOOKASIDE_USED 0] break
  expr {$x==0 && $y<$z && $z>10 && $z<100}
} {1}
do_test lookaside-2.3 {
  db eval {SELECT 1}
  sqlite3_db_config_lookaside db 0 50 50
} {5}  ;# SQLITE_BUSY
do_test lookaside-2.4 {
  db cache flush
  sqlite3_db_config_lookaside db 0 50 50
} {0}  ;# SQLITE_OK
do_test lookaside-2.5 {

package require sqlite3
package require Tk

#############################################################################
# Code to set up scrollbars for widgets. This is generic, boring stuff.
#
namespace eval autoscroll {
  proc scrollable {widget path args} {
    ::ttk::frame $path
    set w  [$widget ${path}.widget {*}$args]
    set vs [::ttk::scrollbar ${path}.vs]
    set hs [::ttk::scrollbar ${path}.hs -orient horizontal]
    grid $w  -row 0 -column 0 -sticky nsew
  
    grid rowconfigure    $path 0 -weight 1
    grid columnconfigure $path 0 -weight 1
  
    set grid [list grid $vs -row 0 -column 1 -sticky nsew]
    $w configure -yscrollcommand [list ::autoscroll::scrollcommand $grid $vs]
    $vs configure -command       [list $w yview]
    set grid [list grid $hs -row 1 -column 0 -sticky nsew]
    $w configure -xscrollcommand [list ::autoscroll::scrollcommand $grid $hs]
    $hs configure -command       [list $w xview]
  
    return $w
  }
  proc scrollcommand {grid sb args} {
    $sb set {*}$args
    set isRequired [expr {[lindex $args 0] != 0.0 || [lindex $args 1] != 1.0}]
    if {$isRequired && ![winfo ismapped $sb]} {
      {*}$grid
    }
    if {!$isRequired && [winfo ismapped $sb]} {
      grid forget $sb
    }
  }
  namespace export scrollable
}
namespace import ::autoscroll::*
#############################################################################

proc populate_text_widget {db} {
  $::O(text) configure -state normal
  set id [lindex [$::O(tree) selection] 0]
  set frame [lindex $id end]

  set line [$db one {SELECT line FROM frame WHERE frame = $frame}]
  if {$line ne ""} {
    foreach {file line} [split $line :] {}
    set content [$db one "SELECT content FROM file WHERE name = '$file'"]
    $::O(text) delete 0.0 end

    set iLine 1
    foreach L [split $content "\n"] {
      if {$iLine == $line} {
        $::O(text) insert end "$L\n" highlight
      } else {
        $::O(text) insert end "$L\n"
      }
      incr iLine
    }
    $::O(text) yview -pickplace ${line}.0
  }
  $::O(text) configure -state disabled
}

proc populate_index {db} {
  $::O(text) configure -state normal
  
  $::O(text) delete 0.0 end
  $::O(text) insert end "\n\n"

  set L [format "    % -40s%12s%12s\n" "Test Case" "Allocations" "Bytes"]
  $::O(text) insert end $L
  $::O(text) insert end "    [string repeat - 64]\n"

  $db eval {
    SELECT 'TOTAL' AS ztest, sum(ncall) AS calls, sum(nbyte) AS bytes
    FROM malloc 
      UNION ALL
    SELECT ztest AS ztest, sum(ncall) AS calls, sum(nbyte) AS bytes
    FROM malloc 
    GROUP BY ztest

    ORDER BY 3 DESC
  } {
    set tags [list $ztest]
    if {$ztest eq $::O(current)} {
      lappend tags highlight
    }
    set L [format "    % -40s%12s%12s\n" $ztest $calls $bytes]
    $::O(text) insert end $L $tags

    $::O(text) tag bind $ztest <1> [list populate_tree_widget $db $ztest]
    $::O(text) tag bind $ztest <Enter> [list $::O(text) configure -cursor hand2]
    $::O(text) tag bind $ztest <Leave> [list $::O(text) configure -cursor ""]
  }

  $::O(text) configure -state disabled
}

proc sort_tree_compare {iLeft iRight} {
  global O
  switch -- [expr (int($O(tree_sort)/2))] {
    0 {
      set left  [$O(tree) item $iLeft -text]
      set right [$O(tree) item $iRight -text]
      set res [string compare $left $right]
    }
    1 {
      set left  [lindex [$O(tree) item $iLeft -values] 0]
      set right [lindex [$O(tree) item $iRight -values] 0]
      set res [expr $left - $right]
    }
    2 {
      set left  [lindex [$O(tree) item $iLeft -values] 1]
      set right [lindex [$O(tree) item $iRight -values] 1]
      set res [expr $left - $right]
    }
  }
  if {$O(tree_sort)&0x01} {
    set res [expr -1 * $res]
  }
  return $res
}

proc sort_tree {iMode} {
  global O
  if {$O(tree_sort) == $iMode} {
    incr O(tree_sort)
  } else {
    set O(tree_sort) $iMode
  }
  set T $O(tree)
  set items [$T children {}]
  set items [lsort -command sort_tree_compare $items]
  for {set ii 0} {$ii < [llength $items]} {incr ii} {
    $T move [lindex $items $ii] {} $ii
  }
}

proc trim_frames {stack} {
  while {[info exists ::O(ignore.[lindex $stack 0])]} {
    set stack [lrange $stack 1 end]
  }
  return $stack
}

proc populate_tree_widget {db zTest} {
  $::O(tree) delete [$::O(tree) children {}]

  for {set ii 0} {$ii < 15} {incr ii} {
    $db eval {
      SELECT 
        sum(ncall) AS calls, 
        sum(nbyte) AS bytes,
        trim_frames(lrange(lstack, 0, $ii)) AS stack
      FROM malloc
      WHERE (zTest = $zTest OR $zTest = 'TOTAL') AND llength(lstack)>$ii
      GROUP BY stack
      HAVING stack != ''
    } {
      set parent_id [lrange $stack 0 end-1]
      set frame [lindex $stack end]
      set line [$db one {SELECT line FROM frame WHERE frame = $frame}]
      set line [lindex [split $line /] end]
      set v [list $calls $bytes]

      catch {
        $::O(tree) insert $parent_id end -id $stack -text $line -values $v
      }
    }
  }

  set ::O(current) $zTest
  populate_index $db
}



set O(tree_sort) 0

::ttk::panedwindow .pan -orient horizontal
set O(tree) [scrollable ::ttk::treeview .pan.tree]

frame .pan.right
set O(text) [scrollable text .pan.right.text]
button .pan.right.index -command {populate_index mddb} -text "Show Index"
pack .pan.right.index -side top -fill x
pack .pan.right.text -fill both -expand true

$O(text) tag configure highlight -background wheat
$O(text) configure -wrap none -height 35

.pan add .pan.tree
.pan add .pan.right

$O(tree) configure     -columns {calls bytes}
$O(tree) heading #0    -text Line  -anchor w -command {sort_tree 0}
$O(tree) heading calls -text Calls -anchor w -command {sort_tree 2}
$O(tree) heading bytes -text Bytes -anchor w -command {sort_tree 4}
$O(tree) column #0    -width 150
$O(tree) column calls -width 100
$O(tree) column bytes -width 100

pack .pan -fill both -expand 1

#--------------------------------------------------------------------
# Open the database containing the malloc data. The user specifies the
# database to use by passing the file-name on the command line.
#
proc open_database {} {
  if {[info exists ::BUILTIN]} {
    sqlite3 mddb :memory:
    mddb eval $::BUILTIN
    wm title . $::argv0
  } else {
    set zFilename [lindex $::argv 0]
    if {$zFilename eq ""} {
      set zFilename mallocs.sql
    }
    set fd [open $zFilename]
    set zHdr [read $fd 15]
    if {$zHdr eq "SQLite format 3"} {
      close $fd
      sqlite3 mddb $zFilename
    } else {
      seek $fd 0
      sqlite3 mddb :memory:
      mddb eval [read $fd]
      close $fd
    }
    wm title . $zFilename
  }

  mddb function lrange -argcount 3 lrange
  mddb function llength -argcount 1 llength
  mddb function trim_frames -argcount 1 trim_frames

  mddb eval {
    SELECT frame FROM frame 
    WHERE line LIKE '%malloc.c:%' OR line LIKE '%mem2.c:%'
  } {
    set ::O(ignore.$frame) 1
  }
}

open_database
bind $O(tree) <<TreeviewSelect>> [list populate_text_widget mddb]

populate_tree_widget mddb [mddb one {SELECT zTest FROM malloc LIMIT 1}]

  }
  foreach {k v} $args {
    set o [array names options ${k}*]
    if {[llength $o]>1}  { error "ambiguous option: $k" }
    if {[llength $o]==0} { error "unknown option: $k" }
    set options([lindex $o 0]) $v
  }








  set     ::testspec($name) [array get options]
  lappend ::testsuitelist $name
}

#-------------------------------------------------------------------------
# test_set ARGS...
................................................................................

test_suite "window" -prefix "" -description {
  All window function related tests .
} -files [
  test_set [glob -nocomplain $::testdir/window*.test]
]

test_suite "alter" -prefix "" -description {
  All ALTER function related tests .
} -files [
  test_set [glob -nocomplain $::testdir/alter*.test]
]

test_suite "lsm1" -prefix "" -description {
  All LSM1 tests.
} -files [glob -nocomplain $::testdir/../ext/lsm1/test/*.test]

test_suite "nofaultsim" -prefix "" -description {
  "Very" quick test suite. Runs in less than 5 minutes on a workstation. 
  This test suite is the same as the "quick" tests, except that some files
................................................................................
  sqlite3_initialize
  autoinstall_test_functions
}

test_suite "nomutex" -description {
  Tests run with the SQLITE_OPEN_MULTITHREADED flag passed to sqlite3_open().
} -initialize {
  rename sqlite3 sqlite3_nomutex
  proc sqlite3 {args} {
    if {[string range [lindex $args 0] 0 0] ne "-"} {
      lappend args -fullmutex 0 -nomutex 1
    }
    uplevel [concat sqlite3_nomutex $args]
  }
} -files {
  delete.test   delete2.test  insert.test  rollback.test  select1.test
  select2.test  trans.test    update.test  vacuum.test    types.test
  types2.test   types3.test
} -shutdown {
  rename sqlite3 {}
  rename sqlite3_nomutex sqlite3
}

# Run some tests in SQLITE_CONFIG_MULTITHREAD mode.
#
test_suite "multithread" -description {
  Tests run in SQLITE_CONFIG_MULTITHREAD mode
} -initialize {
  catch {db close}
................................................................................
}

# Run some tests in SQLITE_OPEN_FULLMUTEX mode.
#
test_suite "fullmutex" -description {
  Tests run in SQLITE_OPEN_FULLMUTEX mode
} -initialize {
  rename sqlite3 sqlite3_fullmutex
  proc sqlite3 {args} {
    if {[string range [lindex $args 0] 0 0] ne "-"} {
      lappend args -nomutex 0 -fullmutex 1
    }
    uplevel [concat sqlite3_fullmutex $args]
  }
} -files {
  delete.test   delete2.test  insert.test  rollback.test  select1.test
  select2.test  trans.test    update.test  vacuum.test    types.test
  types2.test   types3.test
} -shutdown {
  rename sqlite3 {}
  rename sqlite3_fullmutex sqlite3
}

# Run some tests using the "onefile" demo.
#
test_suite "onefile" -description {
  Run some tests using the "test_onefile.c" demo
} -initialize {
  rename sqlite3 sqlite3_onefile
  proc sqlite3 {args} {
    if {[string range [lindex $args 0] 0 0] ne "-"} {
      lappend args -vfs fs
    }
    uplevel [concat sqlite3_onefile $args]
  }
} -files {
  conflict.test  insert.test   insert2.test  insert3.test
  rollback.test  select1.test  select2.test  select3.test
} -shutdown {
  rename sqlite3 {}
  rename sqlite3_onefile sqlite3
}

# Run some tests using UTF-16 databases.
#
test_suite "utf16" -description {
  Run tests using UTF-16 databases
} -presql {
................................................................................
#   rename crashsql {}
#   rename sa_crashsql crashsql
# } -files crash.test

test_suite "safe_append" -description {
  Run some tests on a SAFE_APPEND file-system.
} -initialize {
  rename sqlite3 sqlite3_safeappend
  proc sqlite3 {args} {
    if {[string range [lindex $args 0] 0 0] ne "-"} {
      lappend args -vfs devsym
    }
    uplevel [concat sqlite3_safeappend $args]
  }
  sqlite3_simulate_device -char safe_append
} -shutdown {
  rename sqlite3 {}
  rename sqlite3_shutdown sqlite3
} -files [
  test_set $::allquicktests shared_err.test -exclude async3.test
]

# The set of tests to run on the alternative-pcache
set perm-alt-pcache-testset {
  async.test
................................................................................
# run_tests NAME OPTIONS
#
# where available options are:  
#
#       -description TITLE
#       -initialize  SCRIPT
#       -shutdown    SCRIPT
#       -presql      SQL
#       -files       LIST-OF-FILES
#       -prefix      NAME

#
proc run_tests {name args} {





  array set options $args

  set ::G(perm:name)         $name
  set ::G(perm:prefix)       $options(-prefix)
  set ::G(perm:presql)       $options(-presql)
  set ::G(isquick)           1
  set ::G(perm:dbconfig)     $options(-dbconfig)

  foreach file [lsort $options(-files)] {
    uplevel $options(-initialize)
    if {[file tail $file] == $file} { set file [file join $::testdir $file] }
    slave_test_file $file
    uplevel $options(-shutdown)


  }

  unset ::G(perm:name)
  unset ::G(perm:prefix)
  unset ::G(perm:presql)
  unset ::G(perm:dbconfig)
}

proc run_test_suite {name} {
  if {[info exists ::testspec($name)]==0} {
    error "No such test suite: $name"
  }
................................................................................
  uplevel run_tests $name $::testspec($name)
}

proc help {} {
  puts "Usage: $::argv0 TESTSUITE ?TESTFILE?"
  puts ""
  puts "Available test-suites are:"


  foreach k $::testsuitelist {
    if {[info exists ::testspec($k)]==0} {
      puts "         ----------------------------------------"


      puts ""
    } else {
      array set o $::testspec($k)
      puts "Test suite: \"$k\""
      set d [string trim $o(-description)]
      set d [regsub {\n *} $d "\n  "]
      puts "  $d"







      puts ""
    }
  }





  exit -1
}

if {[file tail $argv0] == "permutations.test"} {
  proc main {argv} {
    if {[llength $argv]==0} {
      help
    } else {



      set suite [file tail [lindex $argv 0]]
      if {[info exists ::testspec($suite)]==0} help







      set extra ""












      if {[llength $argv]>1} { set extra [list -files [lrange $argv 1 end]] }


      eval run_tests $suite $::testspec($suite) $extra
    }
  }
  main $argv
  finish_test
}

  }
  foreach {k v} $args {
    set o [array names options ${k}*]
    if {[llength $o]>1}  { error "ambiguous option: $k" }
    if {[llength $o]==0} { error "unknown option: $k" }
    set options([lindex $o 0]) $v
  }

  # Transform "-presql" into a "dbconfig" script
  #
  if {[info exists options(-presql)]} {
    append options(-dbconfig) "\n\$::dbhandle eval { $options(-presql) }"
    unset options(-presql)
  }

  set     ::testspec($name) [array get options]
  lappend ::testsuitelist $name
}

#-------------------------------------------------------------------------
# test_set ARGS...
................................................................................

test_suite "window" -prefix "" -description {
  All window function related tests .
} -files [
  test_set [glob -nocomplain $::testdir/window*.test]
]







test_suite "lsm1" -prefix "" -description {
  All LSM1 tests.
} -files [glob -nocomplain $::testdir/../ext/lsm1/test/*.test]

test_suite "nofaultsim" -prefix "" -description {
  "Very" quick test suite. Runs in less than 5 minutes on a workstation. 
  This test suite is the same as the "quick" tests, except that some files
................................................................................
  sqlite3_initialize
  autoinstall_test_functions
}

test_suite "nomutex" -description {
  Tests run with the SQLITE_OPEN_MULTITHREADED flag passed to sqlite3_open().
} -initialize {



  set ::G(perm:sqlite3_args) [list -fullmutex 0 -nomutex 1]



} -files {
  delete.test   delete2.test  insert.test  rollback.test  select1.test
  select2.test  trans.test    update.test  vacuum.test    types.test
  types2.test   types3.test



} 

# Run some tests in SQLITE_CONFIG_MULTITHREAD mode.
#
test_suite "multithread" -description {
  Tests run in SQLITE_CONFIG_MULTITHREAD mode
} -initialize {
  catch {db close}
................................................................................
}

# Run some tests in SQLITE_OPEN_FULLMUTEX mode.
#
test_suite "fullmutex" -description {
  Tests run in SQLITE_OPEN_FULLMUTEX mode
} -initialize {



  set ::G(perm:sqlite3_args) [list -nomutex 0 -fullmutex 1]



} -files {
  delete.test   delete2.test  insert.test  rollback.test  select1.test
  select2.test  trans.test    update.test  vacuum.test    types.test
  types2.test   types3.test



}

# Run some tests using the "onefile" demo.
#
test_suite "onefile" -description {
  Run some tests using the "test_onefile.c" demo
} -initialize {
  set ::G(perm:sqlite3_args) [list -vfs fs]






} -files {
  conflict.test  insert.test   insert2.test  insert3.test
  rollback.test  select1.test  select2.test  select3.test



}

# Run some tests using UTF-16 databases.
#
test_suite "utf16" -description {
  Run tests using UTF-16 databases
} -presql {
................................................................................
#   rename crashsql {}
#   rename sa_crashsql crashsql
# } -files crash.test

test_suite "safe_append" -description {
  Run some tests on a SAFE_APPEND file-system.
} -initialize {
  set ::G(perm:sqlite3_args) [list -vfs devsym]






  sqlite3_simulate_device -char safe_append



} -files [
  test_set $::allquicktests shared_err.test -exclude async3.test
]

# The set of tests to run on the alternative-pcache
set perm-alt-pcache-testset {
  async.test
................................................................................
# run_tests NAME OPTIONS
#
# where available options are:  
#
#       -description TITLE
#       -initialize  SCRIPT
#       -shutdown    SCRIPT

#       -files       LIST-OF-FILES
#       -prefix      NAME
#       -dbconfig    SCRIPT
#
proc run_tests {name args} {
  set options(-initialize) ""
  set options(-shutdown) ""
  set options(-prefix) ""
  set options(-dbconfig) ""

  array set options $args

  set ::G(perm:name)         $name
  set ::G(perm:prefix)       $options(-prefix)

  set ::G(isquick)           1
  set ::G(perm:dbconfig)     $options(-dbconfig)

  foreach file [lsort $options(-files)] {
    uplevel $options(-initialize)
    if {[file tail $file] == $file} { set file [file join $::testdir $file] }
    slave_test_file $file
    uplevel $options(-shutdown)

    unset -nocomplain ::G(perm:sqlite3_args)
  }

  unset ::G(perm:name)
  unset ::G(perm:prefix)

  unset ::G(perm:dbconfig)
}

proc run_test_suite {name} {
  if {[info exists ::testspec($name)]==0} {
    error "No such test suite: $name"
  }
................................................................................
  uplevel run_tests $name $::testspec($name)
}

proc help {} {
  puts "Usage: $::argv0 TESTSUITE ?TESTFILE?"
  puts ""
  puts "Available test-suites are:"

  set iPos 0
  foreach k $::testsuitelist {
    if {[info exists ::testspec($k)]} {

      switch $iPos {
        0 {
          puts ""



          puts -nonewline "  [format %-30s $k]"


        }

        1 {
          puts -nonewline [format %-30s $k]
        }

        2 {
          puts -nonewline $k
        }
      }

      set iPos [expr (($iPos+1) % 3)]
    }
  }
  puts ""
  exit -1
}

if {[file tail $argv0] == "permutations.test"} {
  proc main {argv} {
    if {[llength $argv]==0} {
      help
    } else {

      # See if the first argument is a named test-suite.
      #
      set suite [file tail [lindex $argv 0]]
      if {[info exists ::testspec($suite)]} {
        set S $::testspec($suite)
        set i 1
      } else {
        set S [list]
        set i 0
      }

      set extra ""
      if {$i < [llength $argv] && [string range [lindex $argv $i] 0 0]!="-" } {
        set files [list]
        for {} {$i < [llength $argv]} {incr i} {
          set pattern [string map {% *} [lindex $argv $i]]
          if {[string range $pattern 0 0]=="-"} break
          foreach f $::alltests {
            set tail [file tail $f]
            if {[lsearch $files $f]<0 && [string match $pattern $tail]} {
              lappend files $f
            }
          }
        }
        set extra [list -files $files]
      }

      eval run_tests $suite $S $extra
    }
  }
  main $argv
  finish_test
}

} {}
do_test printf-15.3 {
  sqlite3_snprintf_int 0 {} 0
} {abcdefghijklmnopqrstuvwxyz}

# Now test malloc() failure within a sqlite3_mprintf():
#
ifcapable memdebug {
  foreach var {a b c d} {
    set $var [string repeat $var 400]
  }
  set str1 "[string repeat A 360]%d%d%s"
  set str2 [string repeat B 5000]
  set zSuccess "[string repeat A 360]11[string repeat B 5000]"
  foreach ::iRepeat {0 1} {
    set nTestNum 1
    while {1} {
      sqlite3_memdebug_fail $nTestNum -repeat $::iRepeat
      set z [sqlite3_mprintf_str $str1 1 1 $str2]
      set nFail [sqlite3_memdebug_fail -1 -benign nBenign]
      do_test printf-malloc-$::iRepeat.$nTestNum {
        expr {($nFail>0 && $z eq "") || ($nFail==$nBenign && $z eq $zSuccess)}
      } {1}
      if {$nFail == 0} break
      incr nTestNum
    }
  }
}

finish_test

} {}
do_test printf-15.3 {
  sqlite3_snprintf_int 0 {} 0
} {abcdefghijklmnopqrstuvwxyz}

# Now test malloc() failure within a sqlite3_mprintf():
#

foreach var {a b c d} {
  set $var [string repeat $var 400]
}
set str1 "[string repeat A 360]%d%d%s"
set str2 [string repeat B 5000]
set zSuccess "[string repeat A 360]11[string repeat B 5000]"
foreach ::iRepeat {0 1} {
  set nTestNum 1
  while {1} {
    sqlite3_memdebug_fail $nTestNum -repeat $::iRepeat
    set z [sqlite3_mprintf_str $str1 1 1 $str2]
    set nFail [sqlite3_memdebug_fail -1 -benign nBenign]
    do_test printf-malloc-$::iRepeat.$nTestNum {
      expr {($nFail>0 && $z eq "") || ($nFail==$nBenign && $z eq $zSuccess)}
    } {1}
    if {$nFail == 0} break
    incr nTestNum
  }
}


finish_test

    -DHAVE_UTIME=0
  }
  "Unlock-Notify" {
    -O2
    -DSQLITE_ENABLE_UNLOCK_NOTIFY
    -DSQLITE_THREADSAFE
    -DSQLITE_TCL_DEFAULT_FULLMUTEX=1

  }
  "Secure-Delete" {
    -O2
    -DSQLITE_SECURE_DELETE=1
    -DSQLITE_SOUNDEX=1
  }
  "Update-Delete-Limit" {

    -DHAVE_UTIME=0
  }
  "Unlock-Notify" {
    -O2
    -DSQLITE_ENABLE_UNLOCK_NOTIFY
    -DSQLITE_THREADSAFE
    -DSQLITE_TCL_DEFAULT_FULLMUTEX=1
    -DSQLITE_USER_AUTHENTICATION=1
  }
  "Secure-Delete" {
    -O2
    -DSQLITE_SECURE_DELETE=1
    -DSQLITE_SOUNDEX=1
  }
  "Update-Delete-Limit" {

  # look for a few of the possible help commands
  list [regexp {.help} $res] \
       [regexp {.quit} $res] \
       [regexp {.show} $res]
} {1 1 1}
do_test shell1-3.10.2 {
  # we allow .help to take extra args (it is help after all)
  set res [catchcmd "test.db" ".help BAD"]
  # look for a few of the possible help commands
  list [regexp {.help} $res] \
       [regexp {.quit} $res] \
       [regexp {.show} $res]
} {1 1 1}

# .import FILE TABLE     Import data from FILE into TABLE

  # look for a few of the possible help commands
  list [regexp {.help} $res] \
       [regexp {.quit} $res] \
       [regexp {.show} $res]
} {1 1 1}
do_test shell1-3.10.2 {
  # we allow .help to take extra args (it is help after all)
  set res [catchcmd "test.db" ".help *"]
  # look for a few of the possible help commands
  list [regexp {.help} $res] \
       [regexp {.quit} $res] \
       [regexp {.show} $res]
} {1 1 1}

# .import FILE TABLE     Import data from FILE into TABLE

load_static_extension db series
load_static_extension db carray
load_static_extension db remember

do_execsql_test tabfunc01-1.1 {
  SELECT *, '|' FROM generate_series WHERE start=1 AND stop=9 AND step=2;
} {1 | 3 | 5 | 7 | 9 |}



do_execsql_test tabfunc01-1.2 {
  SELECT *, '|' FROM generate_series LIMIT 5;
} {0 | 1 | 2 | 3 | 4 |}
do_catchsql_test tabfunc01-1.3 {
  CREATE VIRTUAL TABLE t1 USING generate_series;
} {1 {no such module: generate_series}}
do_execsql_test tabfunc01-1.4 {

load_static_extension db series
load_static_extension db carray
load_static_extension db remember

do_execsql_test tabfunc01-1.1 {
  SELECT *, '|' FROM generate_series WHERE start=1 AND stop=9 AND step=2;
} {1 | 3 | 5 | 7 | 9 |}
do_execsql_test tabfunc01-1.1b {
  PRAGMA table_xinfo(generate_series);
} {0 value {} 0 {} 0 0 1 start {} 0 {} 0 1 2 stop {} 0 {} 0 1 3 step {} 0 {} 0 1}
do_execsql_test tabfunc01-1.2 {
  SELECT *, '|' FROM generate_series LIMIT 5;
} {0 | 1 | 2 | 3 | 4 |}
do_catchsql_test tabfunc01-1.3 {
  CREATE VIRTUAL TABLE t1 USING generate_series;
} {1 {no such module: generate_series}}
do_execsql_test tabfunc01-1.4 {

source $testdir/tester.tcl

ifcapable !gettable {
  finish_test
  return
}

ifcapable memdebug {
  source $testdir/malloc_common.tcl
}

do_test tableapi-1.0 {
  set ::dbx [sqlite3_open test.db]
  catch {sqlite_exec_printf $::dbx {DROP TABLE xyz} {}}
  sqlite3_exec_printf $::dbx {CREATE TABLE %s(a int, b text)} xyz
} {0 {}}
do_test tableapi-1.1 {
................................................................................
# each iteration.  $::dbx is a seperate connection, and on Windows, will
# cause the file deletion of test.db to fail, so we move the close of $::dbx
# up to here before the do_malloc_test.
do_test tableapi-99.0 {
  sqlite3_close $::dbx
} {SQLITE_OK}

ifcapable memdebug {
  do_malloc_test tableapi-7 -sqlprep {
    DROP TABLE IF EXISTS t1;
    CREATE TABLE t1(a,b);
    INSERT INTO t1 VALUES(1,2);
    INSERT INTO t1 VALUES(3,4);
    INSERT INTO t1 SELECT a+4, b+4 FROM t1;
    INSERT INTO t1 SELECT a+8, b+8 FROM t1;
  } -tclbody {
    set r [sqlite3_get_table_printf db {SELECT rowid, a, b FROM t1} {}]
    if {[llength $r]<26} {error "out of memory"}
  }
}

finish_test

source $testdir/tester.tcl

ifcapable !gettable {
  finish_test
  return
}


source $testdir/malloc_common.tcl


do_test tableapi-1.0 {
  set ::dbx [sqlite3_open test.db]
  catch {sqlite_exec_printf $::dbx {DROP TABLE xyz} {}}
  sqlite3_exec_printf $::dbx {CREATE TABLE %s(a int, b text)} xyz
} {0 {}}
do_test tableapi-1.1 {
................................................................................
# each iteration.  $::dbx is a seperate connection, and on Windows, will
# cause the file deletion of test.db to fail, so we move the close of $::dbx
# up to here before the do_malloc_test.
do_test tableapi-99.0 {
  sqlite3_close $::dbx
} {SQLITE_OK}


do_malloc_test tableapi-7 -sqlprep {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(a,b);
  INSERT INTO t1 VALUES(1,2);
  INSERT INTO t1 VALUES(3,4);
  INSERT INTO t1 SELECT a+4, b+4 FROM t1;
  INSERT INTO t1 SELECT a+8, b+8 FROM t1;
} -tclbody {
  set r [sqlite3_get_table_printf db {SELECT rowid, a, b FROM t1} {}]
  if {[llength $r]<26} {error "out of memory"}

}

finish_test

# SQLite library. 
#
# Actually, all tests are based on the TCL interface, so the main
# interface is pretty well tested.  This file contains some addition
# tests for fringe issues that the main test suite does not cover.
#
# $Id: tclsqlite.test,v 1.73 2009/03/16 13:19:36 danielk1977 Exp $



set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Check the error messages generated by tclsqlite
#
set r "sqlite_orig HANDLE ?FILENAME? ?-vfs VFSNAME? ?-readonly BOOLEAN? ?-create BOOLEAN? ?-nomutex BOOLEAN? ?-fullmutex BOOLEAN? ?-uri BOOLEAN?"
................................................................................
if {[sqlite3 -has-codec]} {
  append r " ?-key CODECKEY?"
}
do_test tcl-1.1 {
  set v [catch {sqlite3 -bogus} msg]
  regsub {really_sqlite3} $msg {sqlite3} msg
  lappend v $msg





} [list 1 "wrong # args: should be \"$r\""]
do_test tcl-1.2 {
  set v [catch {db bogus} msg]
  lappend v $msg
} {1 {bad option "bogus": must be authorizer, backup, busy, cache, changes, close, collate, collation_needed, commit_hook, complete, copy, deserialize, enable_load_extension, errorcode, eval, exists, function, incrblob, interrupt, last_insert_rowid, nullvalue, onecolumn, preupdate, profile, progress, rekey, restore, rollback_hook, serialize, status, timeout, total_changes, trace, trace_v2, transaction, unlock_notify, update_hook, version, or wal_hook}}
do_test tcl-1.2.1 {
  set v [catch {db cache bogus} msg]

# SQLite library. 
#
# Actually, all tests are based on the TCL interface, so the main
# interface is pretty well tested.  This file contains some addition
# tests for fringe issues that the main test suite does not cover.
#
# $Id: tclsqlite.test,v 1.73 2009/03/16 13:19:36 danielk1977 Exp $

catch {sqlite3}

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Check the error messages generated by tclsqlite
#
set r "sqlite_orig HANDLE ?FILENAME? ?-vfs VFSNAME? ?-readonly BOOLEAN? ?-create BOOLEAN? ?-nomutex BOOLEAN? ?-fullmutex BOOLEAN? ?-uri BOOLEAN?"
................................................................................
if {[sqlite3 -has-codec]} {
  append r " ?-key CODECKEY?"
}
do_test tcl-1.1 {
  set v [catch {sqlite3 -bogus} msg]
  regsub {really_sqlite3} $msg {sqlite3} msg
  lappend v $msg
} [list 1 "wrong # args: should be \"$r\""]
do_test tcl-1.1.1 {
  set v [catch {sqlite3} msg]
  regsub {really_sqlite3} $msg {sqlite3} msg
  lappend v $msg
} [list 1 "wrong # args: should be \"$r\""]
do_test tcl-1.2 {
  set v [catch {db bogus} msg]
  lappend v $msg
} {1 {bad option "bogus": must be authorizer, backup, busy, cache, changes, close, collate, collation_needed, commit_hook, complete, copy, deserialize, enable_load_extension, errorcode, eval, exists, function, incrblob, interrupt, last_insert_rowid, nullvalue, onecolumn, preupdate, profile, progress, rekey, restore, rollback_hook, serialize, status, timeout, total_changes, trace, trace_v2, transaction, unlock_notify, update_hook, version, or wal_hook}}
do_test tcl-1.2.1 {
  set v [catch {db cache bogus} msg]

      }
      {^-+maxerror=.+$} {
        foreach {dummy cmdlinearg(maxerror)} [split $a =] break
      }
      {^-+malloctrace=.+$} {
        foreach {dummy cmdlinearg(malloctrace)} [split $a =] break
        if {$cmdlinearg(malloctrace)} {





          sqlite3_memdebug_log start
        }
      }
      {^-+backtrace=.+$} {
        foreach {dummy cmdlinearg(backtrace)} [split $a =] break
        sqlite3_memdebug_backtrace $cmdlinearg(backtrace)
      }
................................................................................
    incr nErr
  }
  if {[lindex [sqlite3_status SQLITE_STATUS_MALLOC_COUNT 0] 1]>0 ||
              [sqlite3_memory_used]>0} {
    output2 "Unfreed memory: [sqlite3_memory_used] bytes in\
         [lindex [sqlite3_status SQLITE_STATUS_MALLOC_COUNT 0] 1] allocations"
    incr nErr
    ifcapable memdebug||mem5||(mem3&&debug) {
      output2 "Writing unfreed memory log to \"./memleak.txt\""
      sqlite3_memdebug_dump ./memleak.txt
    }
  } else {
    output2 "All memory allocations freed - no leaks"
    ifcapable memdebug||mem5 {
      sqlite3_memdebug_dump ./memusage.txt
    }
  }
  show_memstats
  output2 "Maximum memory usage: [sqlite3_memory_highwater 1] bytes"
  output2 "Current memory usage: [sqlite3_memory_highwater] bytes"
  if {[info commands sqlite3_memdebug_malloc_count] ne ""} {
    output2 "Number of malloc()  : [sqlite3_memdebug_malloc_count] calls"
  }
  if {$::cmdlinearg(malloctrace)} {
    output2 "Writing mallocs.sql..."
    memdebug_log_sql
    sqlite3_memdebug_log stop
    sqlite3_memdebug_log clear

    if {[sqlite3_memory_used]>0} {
      output2 "Writing leaks.sql..."
      sqlite3_memdebug_log sync
      memdebug_log_sql leaks.sql
    }
  }
  catch {
    foreach f [glob -nocomplain test.db-*-journal] {
      forcedelete $f
    }
  }
................................................................................
  set txt [$db eval "SELECT * FROM $master"]\n
  foreach tab $alltab {
    append txt [$db eval "SELECT * FROM $dbname.$tab"]\n
  }
  return [md5 $txt]
}

proc memdebug_log_sql {{filename mallocs.sql}} {

  set data [sqlite3_memdebug_log dump]
  set nFrame [expr [llength [lindex $data 0]]-2]
  if {$nFrame < 0} { return "" }

  set database temp

................................................................................
      set contents [read $fd]
      close $fd
    }
    set contents [string map {' ''} $contents]
    append sql "INSERT INTO ${database}.file VALUES('$f', '$contents');\n"
  }




  set fd [open $filename w]
  puts $fd "BEGIN; ${tbl}${tbl2}${tbl3}${sql} ; COMMIT;"








  close $fd
}

# Drop all tables in database [db]
proc drop_all_tables {{db db}} {
  ifcapable trigger&&foreignkey {
    set pk [$db one "PRAGMA foreign_keys"]

      }
      {^-+maxerror=.+$} {
        foreach {dummy cmdlinearg(maxerror)} [split $a =] break
      }
      {^-+malloctrace=.+$} {
        foreach {dummy cmdlinearg(malloctrace)} [split $a =] break
        if {$cmdlinearg(malloctrace)} {
          if {0==$::sqlite_options(memdebug)} {
            set err "Error: --malloctrace=1 requires an SQLITE_MEMDEBUG build"
            puts stderr $err
            exit 1
          }
          sqlite3_memdebug_log start
        }
      }
      {^-+backtrace=.+$} {
        foreach {dummy cmdlinearg(backtrace)} [split $a =] break
        sqlite3_memdebug_backtrace $cmdlinearg(backtrace)
      }
................................................................................
    incr nErr
  }
  if {[lindex [sqlite3_status SQLITE_STATUS_MALLOC_COUNT 0] 1]>0 ||
              [sqlite3_memory_used]>0} {
    output2 "Unfreed memory: [sqlite3_memory_used] bytes in\
         [lindex [sqlite3_status SQLITE_STATUS_MALLOC_COUNT 0] 1] allocations"
    incr nErr
    ifcapable mem5||(mem3&&debug) {
      output2 "Writing unfreed memory log to \"./memleak.txt\""
      sqlite3_memdebug_dump ./memleak.txt
    }
  } else {
    output2 "All memory allocations freed - no leaks"
    ifcapable mem5 {
      sqlite3_memdebug_dump ./memusage.txt
    }
  }
  show_memstats
  output2 "Maximum memory usage: [sqlite3_memory_highwater 1] bytes"
  output2 "Current memory usage: [sqlite3_memory_highwater] bytes"
  if {[info commands sqlite3_memdebug_malloc_count] ne ""} {
    output2 "Number of malloc()  : [sqlite3_memdebug_malloc_count] calls"
  }
  if {$::cmdlinearg(malloctrace)} {
    output2 "Writing mallocs.tcl..."
    memdebug_log_sql mallocs.tcl
    sqlite3_memdebug_log stop
    sqlite3_memdebug_log clear

    if {[sqlite3_memory_used]>0} {
      output2 "Writing leaks.tcl..."
      sqlite3_memdebug_log sync
      memdebug_log_sql leaks.tcl
    }
  }
  catch {
    foreach f [glob -nocomplain test.db-*-journal] {
      forcedelete $f
    }
  }
................................................................................
  set txt [$db eval "SELECT * FROM $master"]\n
  foreach tab $alltab {
    append txt [$db eval "SELECT * FROM $dbname.$tab"]\n
  }
  return [md5 $txt]
}

proc memdebug_log_sql {filename} {

  set data [sqlite3_memdebug_log dump]
  set nFrame [expr [llength [lindex $data 0]]-2]
  if {$nFrame < 0} { return "" }

  set database temp

................................................................................
      set contents [read $fd]
      close $fd
    }
    set contents [string map {' ''} $contents]
    append sql "INSERT INTO ${database}.file VALUES('$f', '$contents');\n"
  }

  set escaped "BEGIN; ${tbl}${tbl2}${tbl3}${sql} ; COMMIT;"
  set escaped [string map [list "{" "\\{" "}" "\\}"] $escaped] 

  set fd [open $filename w]

  puts $fd "set BUILTIN {"
  puts $fd $escaped
  puts $fd "}"
  puts $fd {set BUILTIN [string map [list "\\{" "{" "\\}" "}"] $BUILTIN]}
  set mtv [open $::testdir/malloctraceviewer.tcl]
  set txt [read $mtv]
  close $mtv
  puts $fd $txt
  close $fd
}

# Drop all tables in database [db]
proc drop_all_tables {{db db}} {
  ifcapable trigger&&foreignkey {
    set pk [$db one "PRAGMA foreign_keys"]

  db eval {
     DELETE FROM result4;
     UPDATE v5 SET b = main.v5.b+9900000 WHERE main.v5.x BETWEEN 3 AND 5;
     SELECT * FROM result4 ORDER BY a;
  }
} {3 305 3 9900305 4 404 4 9900404 5 504 5 9900504}

# Only run the reamining tests if memory debugging is turned on.
#
ifcapable !memdebug {
   puts "Skipping triggerA malloc tests: not compiled with -DSQLITE_MEMDEBUG..."
   finish_test
   return
}
source $testdir/malloc_common.tcl

# Save a copy of the current database configuration.
#
db close
forcedelete test.db-triggerA
copy_file test.db test.db-triggerA

  db eval {
     DELETE FROM result4;
     UPDATE v5 SET b = main.v5.b+9900000 WHERE main.v5.x BETWEEN 3 AND 5;
     SELECT * FROM result4 ORDER BY a;
  }
} {3 305 3 9900305 4 404 4 9900404 5 504 5 9900504}








source $testdir/malloc_common.tcl

# Save a copy of the current database configuration.
#
db close
forcedelete test.db-triggerA
copy_file test.db test.db-triggerA

  db eval {
    CREATE TABLE t25 (x);
    INSERT INTO t25 (x) VALUES (1);
    ANALYZE;
  }
  proc authLogDelete {code arg1 arg2 arg3 arg4 args} {
    if {$code=="SQLITE_DELETE" && [string match sqlite_stat* $arg1]} {
      lappend ::log [list $code $arg1 $arg2 $arg3 $arg4 $args]

    }
    return SQLITE_OK
  }
  set log ""
  db authorizer ::authLogDelete
  db eval {DROP VIEW x1;}
  set log
} {}

set res [list {SQLITE_DELETE sqlite_stat1 {} main {} {}}]
ifcapable stat4 { lappend res {SQLITE_DELETE sqlite_stat4 {} main {} {}} }
do_test view-25.2 {
  set log ""
  db eval {DROP TABLE t25;}
  set log
} $res

finish_test

  db eval {
    CREATE TABLE t25 (x);
    INSERT INTO t25 (x) VALUES (1);
    ANALYZE;
  }
  proc authLogDelete {code arg1 arg2 arg3 arg4 args} {
    if {$code=="SQLITE_DELETE" && [string match sqlite_stat* $arg1]} {
      # lappend ::log [list $code $arg1 $arg2 $arg3 $arg4 $args]
      lappend ::log [list $code $arg1 $arg2 $arg3 $arg4]
    }
    return SQLITE_OK
  }
  set log ""
  db authorizer ::authLogDelete
  db eval {DROP VIEW x1;}
  set log
} {}

set res [list {SQLITE_DELETE sqlite_stat1 {} main {}}]
ifcapable stat4 { lappend res {SQLITE_DELETE sqlite_stat4 {} main {}} }
do_test view-25.2 {
  set log ""
  db eval {DROP TABLE t25;}
  set log
} $res

finish_test

  BEGIN;
    CREATE TABLE r2(a, b, c);
    INSERT INTO r2 SELECT * FROM e;
    INSERT INTO e SELECT a||'x', b, c FROM r2;
  COMMIT;
}

ifcapable !memdebug {
   puts "Skipping vtab_err-2 tests: not compiled with -DSQLITE_MEMDEBUG..."
   finish_test
   return
}
source $testdir/malloc_common.tcl


do_malloc_test vtab_err-2 -tclprep { 
  register_echo_module [sqlite3_connection_pointer db]
} -sqlbody {
  BEGIN;

  BEGIN;
    CREATE TABLE r2(a, b, c);
    INSERT INTO r2 SELECT * FROM e;
    INSERT INTO e SELECT a||'x', b, c FROM r2;
  COMMIT;
}






source $testdir/malloc_common.tcl


do_malloc_test vtab_err-2 -tclprep { 
  register_echo_module [sqlite3_connection_pointer db]
} -sqlbody {
  BEGIN;

do_catchsql_test 11.3 {
  CREATE INDEX t6i ON t6(sum(b) OVER ());
} {1 {misuse of window function sum()}}
do_catchsql_test 11.4 {
  CREATE INDEX t6i ON t6(lead(b) OVER ());
} {1 {misuse of window function lead()}}

finish_test

do_catchsql_test 11.3 {
  CREATE INDEX t6i ON t6(sum(b) OVER ());
} {1 {misuse of window function sum()}}
do_catchsql_test 11.4 {
  CREATE INDEX t6i ON t6(lead(b) OVER ());
} {1 {misuse of window function lead()}}

# 2018-09-17 ticket 510cde277783b5fb5de628393959849dff377eb3
# Endless loop on a query with window functions and a limit
#
do_execsql_test 12.100 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(id INT, b VARCHAR, c VARCHAR);
  INSERT INTO t1 VALUES(1, 'A', 'one');
  INSERT INTO t1 VALUES(2, 'B', 'two');
  INSERT INTO t1 VALUES(3, 'C', 'three');
  INSERT INTO t1 VALUES(4, 'D', 'one');
  INSERT INTO t1 VALUES(5, 'E', 'two');
  SELECT id, b, lead(c,1) OVER(ORDER BY c) AS x 
    FROM t1 WHERE id>1
   ORDER BY b LIMIT 1;
} {2 B two}
do_execsql_test 12.110 {
  INSERT INTO t1 VALUES(6, 'F', 'three');
  INSERT INTO t1 VALUES(7, 'G', 'one');
  SELECT id, b, lead(c,1) OVER(ORDER BY c) AS x
    FROM t1 WHERE id>1
   ORDER BY b LIMIT 2;
} {2 B two 3 C three}

finish_test

execsql_test 10.2 {
  SELECT id, lead(b, -1) OVER (PARTITION BY a ORDER BY id) FROM t7;
}
execsql_test 10.3 {
  SELECT id, lag(b, -1) OVER (PARTITION BY a ORDER BY id) FROM t7;
}





























finish_test

execsql_test 10.2 {
  SELECT id, lead(b, -1) OVER (PARTITION BY a ORDER BY id) FROM t7;
}
execsql_test 10.3 {
  SELECT id, lag(b, -1) OVER (PARTITION BY a ORDER BY id) FROM t7;
}

execsql_test 11.0 {
  DROP VIEW IF EXISTS v8;
  DROP TABLE IF EXISTS t8;
  CREATE TABLE t8(t INT, total INT);
  INSERT INTO t8 VALUES(0,2);
  INSERT INTO t8 VALUES(5,1);
  INSERT INTO t8 VALUES(10,1);
}

execsql_test 11.1 {
  SELECT NTILE(256) OVER (ORDER BY total) - 1 AS nt FROM t8;
}

execsql_test 11.2 {
  CREATE VIEW v8 AS SELECT NTILE(256) OVER (ORDER BY total) - 1 AS nt FROM t8;
}

execsql_test 11.3 {
  SELECT * FROM v8;
}

execsql_test 11.4 {
  SELECT * FROM (
    SELECT NTILE(256) OVER (ORDER BY total) - 1 AS nt FROM t8
  ) sub;
}


finish_test

do_execsql_test 9.1 {
  SELECT rank() OVER () FROM t2
} {1   1   1   1   1   1   1}

do_execsql_test 9.2 {
  SELECT dense_rank() OVER (PARTITION BY x) FROM t2
} {1   1   1   1   1   1   1}


do_test 9.3 {
  set myres {}
  foreach r [db eval {SELECT x, percent_rank() OVER (PARTITION BY x ORDER BY x) FROM t2}] {
    lappend myres [format %.2f [set r]]
  }






  set myres
} {1.00 0.00 1.00 0.00 1.00 0.00 4.00 0.00 4.00 0.00 6.00 0.00 7.00 0.00}


do_execsql_test 9.4 {
  SELECT x, rank() OVER (ORDER BY x) FROM t2 ORDER BY 1,2
} {1 1   1 1   1 1   4 4   4 4   6 6   7 7}

do_execsql_test 9.5 {
  SELECT DISTINCT x, rank() OVER (ORDER BY x) FROM t2 ORDER BY 1,2
} {1 1   4 4   6 6   7 7}


do_test 9.6 {
  set myres {}
  foreach r [db eval {SELECT percent_rank() OVER () FROM t1}] {
    lappend myres [format %.2f [set r]]
  }






  set myres
} {0.00 0.00 0.00}



do_test 9.7 {
  set myres {}
  foreach r [db eval {SELECT cume_dist() OVER () FROM t1}] {
    lappend myres [format %.2f [set r]]
  }






  set myres
} {1.00 1.00 1.00}


do_execsql_test 10.0 {
  DROP TABLE IF EXISTS t7;
  CREATE TABLE t7(id INTEGER PRIMARY KEY, a INTEGER, b INTEGER);
  INSERT INTO t7(id, a, b) VALUES
    (1, 1, 2), (2, 1, NULL), (3, 1, 4),
    (4, 3, NULL), (5, 3, 8), (6, 3, 1);
................................................................................
do_execsql_test 10.2 {
  SELECT id, lead(b, -1) OVER (PARTITION BY a ORDER BY id) FROM t7;
} {1 {}   2 2   3 {}   4 {}   5 {}   6 8}

do_execsql_test 10.3 {
  SELECT id, lag(b, -1) OVER (PARTITION BY a ORDER BY id) FROM t7;
} {1 {}   2 4   3 {}   4 8   5 1   6 {}}




























finish_test

do_execsql_test 9.1 {
  SELECT rank() OVER () FROM t2
} {1   1   1   1   1   1   1}

do_execsql_test 9.2 {
  SELECT dense_rank() OVER (PARTITION BY x) FROM t2
} {1   1   1   1   1   1   1}


do_test 9.3 {
  set myres {}
  foreach r [db eval {SELECT x, percent_rank() OVER (PARTITION BY x ORDER BY x) FROM t2}] {
    lappend myres [format %.4f [set r]]
  }
  set res2 {1.0000 0.0000 1.0000 0.0000 1.0000 0.0000 4.0000 0.0000 4.0000 0.0000 6.0000 0.0000 7.0000 0.0000}
  foreach r [set myres] r2 [set res2] {
    if {[set r]<([set r2]-0.0001) || [set r]>([set r2]+0.0001)} {
      error "list element [set i] does not match: got=[set r] expected=[set r2]"
    }
  }
  set {} {}

} {}

do_execsql_test 9.4 {
  SELECT x, rank() OVER (ORDER BY x) FROM t2 ORDER BY 1,2
} {1 1   1 1   1 1   4 4   4 4   6 6   7 7}

do_execsql_test 9.5 {
  SELECT DISTINCT x, rank() OVER (ORDER BY x) FROM t2 ORDER BY 1,2
} {1 1   4 4   6 6   7 7}


do_test 9.6 {
  set myres {}
  foreach r [db eval {SELECT percent_rank() OVER () FROM t1}] {
    lappend myres [format %.4f [set r]]
  }
  set res2 {0.0000 0.0000 0.0000}
  foreach r [set myres] r2 [set res2] {
    if {[set r]<([set r2]-0.0001) || [set r]>([set r2]+0.0001)} {
      error "list element [set i] does not match: got=[set r] expected=[set r2]"
    }
  }
  set {} {}

} {}


do_test 9.7 {
  set myres {}
  foreach r [db eval {SELECT cume_dist() OVER () FROM t1}] {
    lappend myres [format %.4f [set r]]
  }
  set res2 {1.0000 1.0000 1.0000}
  foreach r [set myres] r2 [set res2] {
    if {[set r]<([set r2]-0.0001) || [set r]>([set r2]+0.0001)} {
      error "list element [set i] does not match: got=[set r] expected=[set r2]"
    }
  }
  set {} {}

} {}

do_execsql_test 10.0 {
  DROP TABLE IF EXISTS t7;
  CREATE TABLE t7(id INTEGER PRIMARY KEY, a INTEGER, b INTEGER);
  INSERT INTO t7(id, a, b) VALUES
    (1, 1, 2), (2, 1, NULL), (3, 1, 4),
    (4, 3, NULL), (5, 3, 8), (6, 3, 1);
................................................................................
do_execsql_test 10.2 {
  SELECT id, lead(b, -1) OVER (PARTITION BY a ORDER BY id) FROM t7;
} {1 {}   2 2   3 {}   4 {}   5 {}   6 8}

do_execsql_test 10.3 {
  SELECT id, lag(b, -1) OVER (PARTITION BY a ORDER BY id) FROM t7;
} {1 {}   2 4   3 {}   4 8   5 1   6 {}}

do_execsql_test 11.0 {
  DROP VIEW IF EXISTS v8;
  DROP TABLE IF EXISTS t8;
  CREATE TABLE t8(t INT, total INT);
  INSERT INTO t8 VALUES(0,2);
  INSERT INTO t8 VALUES(5,1);
  INSERT INTO t8 VALUES(10,1);
} {}

do_execsql_test 11.1 {
  SELECT NTILE(256) OVER (ORDER BY total) - 1 AS nt FROM t8;
} {0   1   2}

do_execsql_test 11.2 {
  CREATE VIEW v8 AS SELECT NTILE(256) OVER (ORDER BY total) - 1 AS nt FROM t8;
} {}

do_execsql_test 11.3 {
  SELECT * FROM v8;
} {0   1   2}

do_execsql_test 11.4 {
  SELECT * FROM (
    SELECT NTILE(256) OVER (ORDER BY total) - 1 AS nt FROM t8
  ) sub;
} {0   1   2}

finish_test

  SELECT count(*) OVER win FROM over
  WINDOW win AS (ORDER BY x ROWS BETWEEN +2 FOLLOWING AND +3 FOLLOWING)
} {1 0 0}

#-------------------------------------------------------------------------
#


do_execsql_test 6.0 {
  SELECT LIKE('!', '', '!') x WHERE x;
} {}

do_execsql_test 6.1 {
  SELECT LIKE("!","","!")""WHeRE"";
} {}

do_catchsql_test 6.2 {
  SELECT LIKE("!","","!")""window"";
} {1 {near "window": syntax error}}


reset_db 
do_execsql_test 7.0 {
  CREATE TABLE t1(x TEXT);
  CREATE INDEX i1 ON t1(x COLLATE nocase);
  INSERT INTO t1 VALUES('');
}


do_execsql_test 7.1 {
  SELECT count(*) FROM t1 WHERE x LIKE '!' ESCAPE '!';
} {0}


#-------------------------------------------------------------------------
#
do_execsql_test 8.0 {
  CREATE TABLE IF NOT EXISTS "sample" (
      "id" INTEGER NOT NULL PRIMARY KEY, 
      "counter" INTEGER NOT NULL, 
................................................................................
    FROM t1 ORDER BY a;
} {
  10 ten 10   15 fifteen 25   20 {} 65        20 {} 65   
  25 {} 90    30 thirty 150   30 thirty 150   50 {} 200
}

finish_test

  SELECT count(*) OVER win FROM over
  WINDOW win AS (ORDER BY x ROWS BETWEEN +2 FOLLOWING AND +3 FOLLOWING)
} {1 0 0}

#-------------------------------------------------------------------------
#

ifcapable !icu {
  do_execsql_test 6.0 {
    SELECT LIKE('!', '', '!') x WHERE x;
  } {}

  do_execsql_test 6.1 {
    SELECT LIKE("!","","!")""WHeRE"";
  } {}

  do_catchsql_test 6.2 {
    SELECT LIKE("!","","!")""window"";
  } {1 {near "window": syntax error}}
}

reset_db 
do_execsql_test 7.0 {
  CREATE TABLE t1(x TEXT);
  CREATE INDEX i1 ON t1(x COLLATE nocase);
  INSERT INTO t1 VALUES('');
}

ifcapable !icu {
  do_execsql_test 7.1 {
    SELECT count(*) FROM t1 WHERE x LIKE '!' ESCAPE '!';
  } {0}
}

#-------------------------------------------------------------------------
#
do_execsql_test 8.0 {
  CREATE TABLE IF NOT EXISTS "sample" (
      "id" INTEGER NOT NULL PRIMARY KEY, 
      "counter" INTEGER NOT NULL, 
................................................................................
    FROM t1 ORDER BY a;
} {
  10 ten 10   15 fifteen 25   20 {} 65        20 {} 65   
  25 {} 90    30 thirty 150   30 thirty 150   50 {} 200
}

finish_test

# 2015-07-05:  Do not allow aggregate recursive queries
#
do_catchsql_test 16.1 {
  WITH RECURSIVE
    i(x) AS (VALUES(1) UNION SELECT count(*) FROM i)
  SELECT * FROM i;
} {1 {recursive aggregate queries not supported}}






















#-------------------------------------------------------------------------
do_execsql_test 17.1 {
  WITH x(a) AS (
    WITH y(b) AS (SELECT 10)
    SELECT 9 UNION ALL SELECT * FROM y
  )

# 2015-07-05:  Do not allow aggregate recursive queries
#
do_catchsql_test 16.1 {
  WITH RECURSIVE
    i(x) AS (VALUES(1) UNION SELECT count(*) FROM i)
  SELECT * FROM i;
} {1 {recursive aggregate queries not supported}}

# Or window-function recursive queries. Ticket e8275b41.
#
ifcapable windowfunc {
  do_catchsql_test 16.2 {
    WITH RECURSIVE
      i(x) AS (VALUES(1) UNION SELECT count(*) OVER () FROM i)
      SELECT * FROM i;
  } {1 {cannot use window functions in recursive queries}}
  do_catchsql_test 16.3 {
    WITH RECURSIVE
      t(id, parent) AS (VALUES(1,2)),
      q(id, parent, rn) AS (
          VALUES(1,2,3)
          UNION ALL
          SELECT t.*, ROW_NUMBER() OVER (ORDER BY t.id) AS rn
          FROM q JOIN t ON t.parent = q.id
          )
        SELECT * FROM q;
  } {1 {cannot use window functions in recursive queries}}
}

#-------------------------------------------------------------------------
do_execsql_test 17.1 {
  WITH x(a) AS (
    WITH y(b) AS (SELECT 10)
    SELECT 9 UNION ALL SELECT * FROM y
  )

  NAME: synchronous
  FLAG: NeedSchema Result0 SchemaReq NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: table_info
  FLAG: NeedSchema Result1 SchemaOpt

  COLS: cid name type notnull dflt_value pk
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)








  NAME: stats
  FLAG: NeedSchema Result0 SchemaReq
  COLS: tbl idx wdth hght flgs
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)

  NAME: index_info
  TYPE: INDEX_INFO
................................................................................
  FLAG: Result0

  NAME: threads
  FLAG: Result0

  NAME: optimize
  FLAG: Result1 NeedSchema





}

# Open the output file
#
set destfile "[file dir [file dir [file normal $argv0]]]/src/pragma.h"
puts "Overwriting $destfile with new pragma table..."
set fd [open $destfile wb]
................................................................................
set type {}
set if {}
set flags {}
set cols {}
set cols_list {}
set arg 0
proc record_one {} {
  global name type if arg allbyname typebyif flags cols allcols
  global cols_list colUsedBy
  if {$name==""} return
  if {$cols!=""} {
    if {![info exists allcols($cols)]} {

      lappend cols_list $cols
      set allcols($cols) [llength $cols_list]
    }
    set cx $allcols($cols)
    lappend colUsedBy($cols) $name
  } else {
    set cx 0
  }
  set allbyname($name) [list $type $arg $if $flags $cx]
  set name {}
  set type {}
  set if {}
  set flags {}
  set cols {}
  set arg 0
}
................................................................................
puts $fd "\n/* Property flags associated with various pragma. */"
set fv 1
foreach f [lsort [array names allflags]] {
  puts $fd [format {#define PragFlg_%-10s 0x%02x /* %s */} \
             $f $fv $flagMeaning($f)]
  set fv [expr {$fv*2}]
}








# Generate the array of column names used by pragmas that act like
# queries.
#
puts $fd "\n/* Names of columns for pragmas that return multi-column result"
puts $fd "** or that return single-column results where the name of the"
puts $fd "** result column is different from the name of the pragma\n*/"
puts $fd "static const char *const pragCName\[\] = {"
set offset 0

foreach cols $cols_list {






  set cols_offset($allcols($cols)) $offset





  set ub " /* Used by: $colUsedBy($cols) */"
  foreach c $cols {

    puts $fd [format "  /* %3d */ %-14s%s" $offset \"$c\", $ub]
    set ub ""
    incr offset
  }
}
puts $fd "\175;"

................................................................................
puts $fd "\175 PragmaName;"
puts $fd "static const PragmaName aPragmaName\[\] = \173"

set current_if {}
set spacer [format {    %26s } {}]
foreach name $allnames {
  foreach {type arg if flag cx} $allbyname($name) break
  if {$cx==0} {
    set cy 0
    set nx 0
  } else {
    set cy $cols_offset($cx)
    set nx [llength [lindex $cols_list [expr {$cx-1}]]]
  }
  if {$if!=$current_if} {
    if {$current_if!=""} {
      foreach this_if $current_if {
        puts $fd "#endif"
      }
    }

  NAME: synchronous
  FLAG: NeedSchema Result0 SchemaReq NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: table_info
  FLAG: NeedSchema Result1 SchemaOpt
  ARG:  0
  COLS: cid name type notnull dflt_value pk
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: table_xinfo
  TYPE: TABLE_INFO
  FLAG: NeedSchema Result1 SchemaOpt
  ARG:  1
  COLS: cid name type notnull dflt_value pk hidden
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: stats
  FLAG: NeedSchema Result0 SchemaReq
  COLS: tbl idx wdth hght flgs
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)

  NAME: index_info
  TYPE: INDEX_INFO
................................................................................
  FLAG: Result0

  NAME: threads
  FLAG: Result0

  NAME: optimize
  FLAG: Result1 NeedSchema

  NAME: legacy_alter_table
  TYPE: FLAG
  ARG:  SQLITE_LegacyAlter
  IF:   !defined(SQLITE_OMIT_FLAG_PRAGMAS)
}

# Open the output file
#
set destfile "[file dir [file dir [file normal $argv0]]]/src/pragma.h"
puts "Overwriting $destfile with new pragma table..."
set fd [open $destfile wb]
................................................................................
set type {}
set if {}
set flags {}
set cols {}
set cols_list {}
set arg 0
proc record_one {} {
  global name type if arg allbyname typebyif flags cols all_cols
  global cols_list colUsedBy
  if {$name==""} return
  if {$cols!=""} {
    if {![info exists all_cols($cols)]} {
      set all_cols($cols) 1
      lappend cols_list $cols

    }
    set cx $cols
    lappend colUsedBy($cols) $name
  } else {
    set cx 0
  }
  set allbyname($name) [list $type $arg $if $flags $cols]
  set name {}
  set type {}
  set if {}
  set flags {}
  set cols {}
  set arg 0
}
................................................................................
puts $fd "\n/* Property flags associated with various pragma. */"
set fv 1
foreach f [lsort [array names allflags]] {
  puts $fd [format {#define PragFlg_%-10s 0x%02x /* %s */} \
             $f $fv $flagMeaning($f)]
  set fv [expr {$fv*2}]
}

# Sort the column lists so that longer column lists occur first
#
proc colscmp {a b} {
  return [expr {[llength $b] - [llength $a]}]
}
set cols_list [lsort -command colscmp $cols_list]

# Generate the array of column names used by pragmas that act like
# queries.
#
puts $fd "\n/* Names of columns for pragmas that return multi-column result"
puts $fd "** or that return single-column results where the name of the"
puts $fd "** result column is different from the name of the pragma\n*/"
puts $fd "static const char *const pragCName\[\] = {"
set offset 0
set allcollist {}
foreach cols $cols_list {
  set n [llength $cols]
  set limit [expr {[llength $allcollist] - $n}]
  for {set i 0} {$i<$limit} {incr i} {
    set sublist [lrange $allcollist $i [expr {$i+$n-1}]]
    if {$sublist==$cols} {
      puts $fd [format "%27s/* $colUsedBy($cols) reuses $i */" ""]
      set cols_offset($cols) $i
      break
    }
  }
  if {$i<$limit} continue
  set cols_offset($cols) $offset
  set ub " /* Used by: $colUsedBy($cols) */"
  foreach c $cols {
    lappend allcollist $c
    puts $fd [format "  /* %3d */ %-14s%s" $offset \"$c\", $ub]
    set ub ""
    incr offset
  }
}
puts $fd "\175;"

................................................................................
puts $fd "\175 PragmaName;"
puts $fd "static const PragmaName aPragmaName\[\] = \173"

set current_if {}
set spacer [format {    %26s } {}]
foreach name $allnames {
  foreach {type arg if flag cx} $allbyname($name) break
  if {$cx==0 || $cx==""} {
    set cy 0
    set nx 0
  } else {
    set cy $cols_offset($cx)
    set nx [llength $cx]
  }
  if {$if!=$current_if} {
    if {$current_if!=""} {
      foreach this_if $current_if {
        puts $fd "#endif"
      }
    }