SQLite

# The new-security-options branch

## The problem that the [new-security-options](/timeline?r=new-security-options) branch tries to solve

An attacker might modify the schema of an SQLite database by adding
structures that cause code to run when some other application opens and
reads the database.  For example, the attacker might replace a table
definition with a view.  Or the attacker might add triggers to tables
or views, or add new CHECK constraints or generated columns or indexes
with expressions in the index list or in the WHERE clause.  If the
added features invoke SQL functions or virtual tables with side effects,
that might cause harm to the system if run by a high-privilege victim.
Or, the added features might exfiltrate information if the database is
read by a high-privilege victim.

The changes in this branch strive to make it easier for high-privilege
applications to safely read SQLite database files that might have been
maliciously corrupted by an attacker.

## Overview of changes in [new-security-options](/timeline?r=new-security-options)

The basic idea is to tag every SQL function and virtual table with one
of three risk levels:

  1.  Innocuous
  2.  Normal
  3.  Direct-Only

Innocuous functions/vtabs are safe and can be used at any time.
Direct-only elements, in contrast, might have cause side-effects and
should only be used from top-level SQL, not from within triggers or views nor
in elements of the schema such as CHECK constraint, DEFAULT values, 
generated columns, index expressions, or in the WHERE clause of a 
partial index that are potentially under the control of an attacker.
Normal elements behave like Innocuous if TRUSTED\_SCHEMA=on
and behave like direct-only if TRUSTED\_SCHEMA=off.

Application-defined functions and virtual tables go in as Normal unless
the application takes deliberate steps to change the risk level.

For backwards compatibility, the default is TRUSTED\_SCHEMA=on.  Documentation
will be updated to recommend applications turn TRUSTED\_SCHEMA to off.

An innocuous function or virtual table is one that can only read content
from the database file in which it resides, and can only alter the database
in which it resides.  Most SQL functions are innocuous.  For example, there
is no harm in an attacker running the abs() function.

Direct-only elements that have side-effects that go outside the database file
in which it lives, or return information from outside of the database file.
Examples of direct-only elements include:

  1.  The fts3\_tokenizer() function
  2.  The writefile() function
  3.  The readfile() function
  4.  The zipvfs virtual table
  5.  The csv virtual table

We do not want an attacker to be able to add these kinds of things to
the database schema and possibly trick a high-privilege application 
from performing any of these actions.  Therefore, functions and vtabs
with side-effects are marked as Direct-Only.

Legacy applications might add other risky functions or vtabs.  Those will
go in as "Normal" by default.  For optimal security, we want those risky
app-defined functions and vtabs to be direct-only, but making that the
default might break some legacy applications.  Hence, all app-defined
functions and vtabs go in as Normal, but the application can switch them
over to "Direct-Only" behavior using a single pragma.

The restrictions on the use of functions and virtual tables do not apply
to TEMP.  A TEMP VIEW or a TEMP TRIGGER can use any valid SQL function
or virtual table.  The idea is that TEMP views and triggers must be
directly created by the application and are thus under the control of the
application.  TEMP views and triggers cannot be created by an attacker who
corrupts the schema of a persistent database file.  Hence TEMP views and
triggers are safe.

## Specific changes

  1.  New sqlite3\_db\_config() option SQLITE\_DBCONFIG\_TRUSTED\_SCHEMA for
      turning TRUSTED\_SCHEMA on and off.  It defaults to ON.

  2.  Compile-time option -DSQLITE\_TRUSTED\_SCHEMA=0 causes the default
      TRUSTED\_SCHEMA setting to be off.

  3.  New pragma "PRAGMA trusted\_schema=(ON\|OFF);".  This provides access
      to the TRUSTED_SCHEMA setting for application coded using scripting
      languages or other secondary languages where they are unable to make
      calls to sqlite3\_db\_config().

  4.  New options for the "enc" parameter to sqlite3\_create\_function() and
      its kin:
      <ol type="a">
      <li>  _SQLITE\_INNOCUOUS_  &rarr; tags the new functions as Innocuous
      <li>  _SQLITE\_DIRECTONLY_ &rarr; tags the new functions as Direct-Only
      </ol>

  5.  New options to sqlite3\_vtab\_config():
      <ol type="a">
      <li>  _SQLITE\_VTAB\_INNOCUOUS_   &rarr; tags the vtab as Innocuous
      <li>  _SQLITE\_VTAB\_DIRECTONLY_  &rarr; tags the vtab as Direct-Only
      </ol>

  6.  Change many of the functions and virtual tables in the SQLite source
      tree to use one of the tags above.

  7.  Enhanced PRAGMA function\_list and virtual-table "pragma\_function\_list"
      with additional columns.  The columns now are:
      <ul>
      <li> _name_      &rarr;  Name of the function
      <li> _builtin_   &rarr;  1 for built-in functions.  0 otherwise.
      <li> _type_      &rarr;  's'=Scalar, 'a'=Aggregate, 'w'=Window
      <li> _enc_       &rarr;  'utf8', 'utf16le', or 'utf16be'
      <li> _narg_      &rarr;  number of argument
      <li> _flags_     &rarr;  Bitmask of SQLITE\_INNOCUOUS, SQLITE\_DIRECTONLY,
                               SQLITE\_DETERMINISTIC, SQLITE\_SUBTYPE, and
                               SQLITE\_FUNC\_INTERNAL flags.
      </ul>
      <p>The last four columns are new.

  8.  The function\_list PRAGMA now also shows all entries for each function.
      So, for example, if a function can take either 2 or 3 arguments,
      there are separate rows for the 2-argument and 3-argument versions of
      the function.

## Additional Notes

The function_list enhancements allow the application to query the set
of SQL functions that meet various criteria.  For example, to see all
SQL functions that are never allowed to be used in the schema or in
trigger or views:

~~~
    SELECT DISTINCT name FROM pragma_function_list
     WHERE (flags & 0x80000)!=0
     ORDER BY name;
~~~

Doing the same is not possible for virtual tables, as a virtual table
might be Innocuous, Normal, or Direct-Only depending on the arguments
passed into the xConnect method.

  }
}

/*
** Register the ICU extension functions with database db.
*/
int sqlite3IcuInit(sqlite3 *db){
# define SQLITEICU_EXTRAFLAGS (SQLITE_DETERMINISTIC|SQLITE_INNOCUOUS)
  static const struct IcuScalar {
    const char *zName;                        /* Function name */
    unsigned char nArg;                       /* Number of arguments */
    unsigned short enc;                       /* Optimal text encoding */
    unsigned int enc;                         /* Optimal text encoding */
    unsigned char iContext;                   /* sqlite3_user_data() context */
    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
  } scalars[] = {
    {"icu_load_collation",  2, SQLITE_UTF8,                1, icuLoadCollation},
    {"icu_load_collation",2,SQLITE_UTF8|SQLITE_DIRECTONLY,1, icuLoadCollation},
#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU)
    {"regexp", 2, SQLITE_ANY|SQLITE_DETERMINISTIC,         0, icuRegexpFunc},
    {"lower",  1, SQLITE_UTF16|SQLITE_DETERMINISTIC,       0, icuCaseFunc16},
    {"lower",  2, SQLITE_UTF16|SQLITE_DETERMINISTIC,       0, icuCaseFunc16},
    {"upper",  1, SQLITE_UTF16|SQLITE_DETERMINISTIC,       1, icuCaseFunc16},
    {"upper",  2, SQLITE_UTF16|SQLITE_DETERMINISTIC,       1, icuCaseFunc16},
    {"lower",  1, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuCaseFunc16},
    {"lower",  2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuCaseFunc16},
    {"upper",  1, SQLITE_UTF8|SQLITE_DETERMINISTIC,        1, icuCaseFunc16},
    {"upper",  2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        1, icuCaseFunc16},
    {"like",   2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuLikeFunc},
    {"like",   3, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuLikeFunc},
    {"regexp", 2, SQLITE_ANY|SQLITEICU_EXTRAFLAGS,         0, icuRegexpFunc},
    {"lower",  1, SQLITE_UTF16|SQLITEICU_EXTRAFLAGS,       0, icuCaseFunc16},
    {"lower",  2, SQLITE_UTF16|SQLITEICU_EXTRAFLAGS,       0, icuCaseFunc16},
    {"upper",  1, SQLITE_UTF16|SQLITEICU_EXTRAFLAGS,       1, icuCaseFunc16},
    {"upper",  2, SQLITE_UTF16|SQLITEICU_EXTRAFLAGS,       1, icuCaseFunc16},
    {"lower",  1, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        0, icuCaseFunc16},
    {"lower",  2, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        0, icuCaseFunc16},
    {"upper",  1, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        1, icuCaseFunc16},
    {"upper",  2, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        1, icuCaseFunc16},
    {"like",   2, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        0, icuLikeFunc},
    {"like",   3, SQLITE_UTF8|SQLITEICU_EXTRAFLAGS,        0, icuLikeFunc},
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU) */
  };
  int rc = SQLITE_OK;
  int i;
  
  for(i=0; rc==SQLITE_OK && i<(int)(sizeof(scalars)/sizeof(scalars[0])); i++){
    const struct IcuScalar *p = &scalars[i];

  if( pNew->zCostTab==0 ){
    *pzErr = sqlite3_mprintf("no edit_distances table specified");
    rc = SQLITE_ERROR;
  }else{
    rc = amatchLoadRules(db, pNew, pzErr);
  }
  if( rc==SQLITE_OK ){
    sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
    rc = sqlite3_declare_vtab(db,
           "CREATE TABLE x(word,distance,language,"
           "command HIDDEN,nword HIDDEN)"
         );
#define AMATCH_COL_WORD       0
#define AMATCH_COL_DISTANCE   1
#define AMATCH_COL_LANGUAGE   2

/* Column numbers */
#define COMPLETION_COLUMN_CANDIDATE 0  /* Suggested completion of the input */
#define COMPLETION_COLUMN_PREFIX    1  /* Prefix of the word to be completed */
#define COMPLETION_COLUMN_WHOLELINE 2  /* Entire line seen so far */
#define COMPLETION_COLUMN_PHASE     3  /* ePhase - used for debugging only */

  sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  rc = sqlite3_declare_vtab(db,
      "CREATE TABLE x("
      "  candidate TEXT,"
      "  prefix TEXT HIDDEN,"
      "  wholeline TEXT HIDDEN,"
      "  phase INT HIDDEN"        /* Used for debugging only */
      ")");

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "compress", 1, SQLITE_UTF8, 0,
                               compressFunc, 0, 0);
  rc = sqlite3_create_function(db, "compress", 1, 
                    SQLITE_UTF8 | SQLITE_INNOCUOUS | SQLITE_DETERMINISTIC,
                    0, compressFunc, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "uncompress", 1, SQLITE_UTF8, 0,
                                 uncompressFunc, 0, 0);
    rc = sqlite3_create_function(db, "uncompress", 1,
                    SQLITE_UTF8 | SQLITE_INNOCUOUS | SQLITE_DETERMINISTIC,
                    0, uncompressFunc, 0, 0);
  }
  return rc;
}

  if( rc ){
    csv_errmsg(&sRdr, "bad schema: '%s' - %s", CSV_SCHEMA, sqlite3_errmsg(db));
    goto csvtab_connect_error;
  }
  for(i=0; i<sizeof(azPValue)/sizeof(azPValue[0]); i++){
    sqlite3_free(azPValue[i]);
  }
  /* Rationale for DIRECTONLY:
  ** An attacker who controls a database schema could use this vtab
  ** to exfiltrate sensitive data from other files in the filesystem.
  ** And, recommended practice is to put all CSV virtual tables in the
  ** TEMP namespace, so they should still be usable from within TEMP
  ** views, so there shouldn't be a serious loss of functionality by
  ** prohibiting the use of this vtab from persistent triggers and views.
  */
  sqlite3_vtab_config(db, SQLITE_VTAB_DIRECTONLY);
  return SQLITE_OK;

csvtab_connect_oom:
  rc = SQLITE_NOMEM;
  csv_errmsg(&sRdr, "out of memory");

csvtab_connect_error:

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "eval", 1, SQLITE_UTF8, 0,
  rc = sqlite3_create_function(db, "eval", 1, 
                               SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
                               sqlEvalFunc, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "eval", 2, SQLITE_UTF8, 0,
    rc = sqlite3_create_function(db, "eval", 2,
                                 SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
                                 sqlEvalFunc, 0, 0);
  }
  return rc;
}

  (void)argv;
  (void)pzErr;
  rc = sqlite3_declare_vtab(db, "CREATE TABLE x" FSDIR_SCHEMA);
  if( rc==SQLITE_OK ){
    pNew = (fsdir_tab*)sqlite3_malloc( sizeof(*pNew) );
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
    sqlite3_vtab_config(db, SQLITE_VTAB_DIRECTONLY);
  }
  *ppVtab = (sqlite3_vtab*)pNew;
  return rc;
}

/*
** This method is the destructor for fsdir vtab objects.

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "readfile", 1, SQLITE_UTF8, 0,
  rc = sqlite3_create_function(db, "readfile", 1, 
                               SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
                               readfileFunc, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "writefile", -1, SQLITE_UTF8, 0,
    rc = sqlite3_create_function(db, "writefile", -1,
                                 SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
                                 writefileFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "lsmode", 1, SQLITE_UTF8, 0,
                                 lsModeFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = fsdirRegister(db);
  }
  return rc;
}

#define DELTAPARSEVTAB_A2     2
#define DELTAPARSEVTAB_DELTA  3
  if( rc==SQLITE_OK ){
    pNew = sqlite3_malloc64( sizeof(*pNew) );
    *ppVtab = (sqlite3_vtab*)pNew;
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
    sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  }
  return rc;
}

/*
** This method is the destructor for deltaparsevtab_vtab objects.
*/

__declspec(dllexport)
#endif
int sqlite3_fossildelta_init(
  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  static const enc = SQLITE_UTF8|SQLITE_INNOCUOUS;
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "delta_create", 2, SQLITE_UTF8, 0,
  rc = sqlite3_create_function(db, "delta_create", 2, enc, 0,
                               deltaCreateFunc, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "delta_apply", 2, SQLITE_UTF8, 0,
    rc = sqlite3_create_function(db, "delta_apply", 2, enc, 0,
                                 deltaApplyFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "delta_output_size", 1, SQLITE_UTF8, 0,
    rc = sqlite3_create_function(db, "delta_output_size", 1, enc, 0,
                                 deltaOutputSizeFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_module(db, "delta_parse", &deltaparsevtabModule, 0);
  }
  return rc;
}

      if( rc==SQLITE_OK ){
        rc = sqlite3_declare_vtab(db, "CREATE TABLE x(word,distance,ruleset)");
      }
      if( rc!=SQLITE_OK ){
        fuzzerDisconnect((sqlite3_vtab *)pNew);
        pNew = 0;
      }else{
        sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
      }
    }
  }

  *ppVtab = (sqlite3_vtab *)pNew;
  return rc;
}

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "ieee754", 1, SQLITE_UTF8, 0,
  rc = sqlite3_create_function(db, "ieee754", 1, 
                               SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                               ieee754func, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "ieee754", 2, SQLITE_UTF8, 0,
    rc = sqlite3_create_function(db, "ieee754", 2,
                                 SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                                 ieee754func, 0, 0);
  }
  return rc;
}

  rc = sqlite3_declare_vtab(db, 
     "CREATE TABLE x(key,value,type,atom,id,parent,fullkey,path,"
                    "json HIDDEN,root HIDDEN)");
  if( rc==SQLITE_OK ){
    pNew = *ppVtab = sqlite3_malloc( sizeof(*pNew) );
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
    sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  }
  return rc;
}

/* destructor for json_each virtual table */
static int jsonEachDisconnect(sqlite3_vtab *pVtab){
  sqlite3_free(pVtab);

     const char *zName;
     sqlite3_module *pModule;
  } aMod[] = {
    { "json_each",            &jsonEachModule               },
    { "json_tree",            &jsonTreeModule               },
  };
#endif
  static const int enc = 
       SQLITE_UTF8 |
       SQLITE_DETERMINISTIC |
       SQLITE_INNOCUOUS;
  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg, enc,
                                 SQLITE_UTF8 | SQLITE_DETERMINISTIC,
                                 (void*)&aFunc[i].flag,
                                 aFunc[i].xFunc, 0, 0);
  }
#ifndef SQLITE_OMIT_WINDOWFUNC
  for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_window_function(db, aAgg[i].zName, aAgg[i].nArg,
                SQLITE_SUBTYPE | SQLITE_UTF8 | SQLITE_DETERMINISTIC, 0,
                                 SQLITE_SUBTYPE | enc, 0,
                                 aAgg[i].xStep, aAgg[i].xFinal,
                                 aAgg[i].xValue, jsonGroupInverse, 0);
  }
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
  for(i=0; i<sizeof(aMod)/sizeof(aMod[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_module(db, aMod[i].zName, aMod[i].pModule, 0);

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "next_char", 3, SQLITE_UTF8, 0,
  rc = sqlite3_create_function(db, "next_char", 3,
                               SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                               nextCharFunc, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "next_char", 4, SQLITE_UTF8, 0,
    rc = sqlite3_create_function(db, "next_char", 4,
                                 SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                                 nextCharFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "next_char", 5, SQLITE_UTF8, 0,
    rc = sqlite3_create_function(db, "next_char", 5,
                                 SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                                 nextCharFunc, 0, 0);
  }
  return rc;
}

/*
** 2020-01-08
**
** 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 SQLite extension implements a noop() function used for testing.
*/
#include "sqlite3ext.h"
SQLITE_EXTENSION_INIT1
#include <assert.h>
#include <string.h>

/*
** Implementation of the noop() function.
**
** The function returns its argument, unchanged.
*/
static void noopfunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  assert( argc==1 );
  sqlite3_result_value(context, argv[0]);
}

#ifdef _WIN32
__declspec(dllexport)
#endif
int sqlite3_noop_init(
  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "noop", 1,
                     SQLITE_UTF8 | SQLITE_DETERMINISTIC,
                     0, noopfunc, 0, 0);
  if( rc ) return rc;
  rc = sqlite3_create_function(db, "noop_i", 1,
                     SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_INNOCUOUS,
                     0, noopfunc, 0, 0);
  if( rc ) return rc;
  rc = sqlite3_create_function(db, "noop_do", 1,
                     SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_DIRECTONLY,
                     0, noopfunc, 0, 0);
  return rc;
}

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "percentile", 2, SQLITE_UTF8, 0,
  rc = sqlite3_create_function(db, "percentile", 2, 
                               SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                               0, percentStep, percentFinal);
  return rc;
}

           "CREATE TABLE prefixes(prefix TEXT, original_string TEXT 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));
    sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  }
  return rc;
}

/*
** This method is the destructor for prefixes_vtab objects.
*/

int sqlite3_regexp_init(
  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  rc = sqlite3_create_function(db, "regexp", 2, SQLITE_UTF8, 0,
                                 re_sql_func, 0, 0);
  rc = sqlite3_create_function(db, "regexp", 2, SQLITE_UTF8|SQLITE_INNOCUOUS,
                               0, re_sql_func, 0, 0);
  return rc;
}

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "rot13", 1, SQLITE_UTF8, 0,
                               rot13func, 0, 0);
  rc = sqlite3_create_function(db, "rot13", 1,
                   SQLITE_UTF8|SQLITE_INNOCUOUS|SQLITE_DETERMINISTIC,
                   0, rot13func, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_collation(db, "rot13", SQLITE_UTF8, 0, rot13CollFunc);
  }
  return rc;
}

  rc = sqlite3_declare_vtab(db,
     "CREATE TABLE x(value,start hidden,stop hidden,step hidden)");
  if( rc==SQLITE_OK ){
    pNew = *ppVtab = sqlite3_malloc( sizeof(*pNew) );
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
    sqlite3_vtab_config(db, SQLITE_INNOCUOUS);
  }
  return rc;
}

/*
** This method is the destructor for series_cursor objects.
*/

  sqlite3 *db,
  char **pzErrMsg,
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "sha1", 1, SQLITE_UTF8, 0,
  rc = sqlite3_create_function(db, "sha1", 1, SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                               sha1Func, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "sha1_query", 1, SQLITE_UTF8, 0,
    rc = sqlite3_create_function(db, "sha1_query", 1, 
                                 SQLITE_UTF8|SQLITE_DIRECTONLY, 0,
                                 sha1QueryFunc, 0, 0);
  }
  return rc;
}

  sqlite3 *db,
  char **pzErrMsg,
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "sha3", 1, SQLITE_UTF8, 0,
                               sha3Func, 0, 0);
  rc = sqlite3_create_function(db, "sha3", 1,
                      SQLITE_UTF8 | SQLITE_INNOCUOUS | SQLITE_DETERMINISTIC,
                      0, sha3Func, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "sha3", 2, SQLITE_UTF8, 0,
                                 sha3Func, 0, 0);
    rc = sqlite3_create_function(db, "sha3", 2,
                      SQLITE_UTF8 | SQLITE_INNOCUOUS | SQLITE_DETERMINISTIC,
                      0, sha3Func, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "sha3_query", 1, SQLITE_UTF8, 0,
                                 sha3QueryFunc, 0, 0);
    rc = sqlite3_create_function(db, "sha3_query", 1,
                      SQLITE_UTF8 | SQLITE_DIRECTONLY,
                      0, sha3QueryFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "sha3_query", 2, SQLITE_UTF8, 0,
                                 sha3QueryFunc, 0, 0);
    rc = sqlite3_create_function(db, "sha3_query", 2,
                      SQLITE_UTF8 | SQLITE_DIRECTONLY,
                      0, sha3QueryFunc, 0, 0);
  }
  return rc;
}

    pNew->zDbName = (char*)&pNew[1];
    memcpy(pNew->zDbName, zDbName, nDbName+1);
    pNew->zTableName = sqlite3_mprintf("%s", zTableName);
    pNew->db = db;
    if( pNew->zTableName==0 ){
      rc = SQLITE_NOMEM;
    }else{
      sqlite3_vtab_config(db, SQLITE_INNOCUOUS);
      rc = sqlite3_declare_vtab(db, 
           "CREATE TABLE x(word,rank,distance,langid, "
           "score, matchlen, phonehash HIDDEN, "
           "top HIDDEN, scope HIDDEN, srchcnt HIDDEN, "
           "soundslike HIDDEN, command HIDDEN)"
      );
#define SPELLFIX_COL_WORD            0

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "sqlar_compress", 1, SQLITE_UTF8, 0,
  rc = sqlite3_create_function(db, "sqlar_compress", 1, 
                               SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                               sqlarCompressFunc, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "sqlar_uncompress", 2, SQLITE_UTF8, 0,
    rc = sqlite3_create_function(db, "sqlar_uncompress", 2,
                                 SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                                 sqlarUncompressFunc, 0, 0);
  }
  return rc;
}

  char **pzErrMsg,
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "tointeger", 1,
        SQLITE_UTF8 | SQLITE_DETERMINISTIC, 0,
        SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_INNOCUOUS, 0,
        tointegerFunc, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "toreal", 1,
        SQLITE_UTF8 | SQLITE_DETERMINISTIC, 0,
        SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_INNOCUOUS, 0,
        torealFunc, 0, 0);
  }
  return rc;
}

  sqlite3 *db,
  char **pzErrMsg,
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;  /* Unused parameter */
  rc = sqlite3_create_function(db, "uuid", 0, SQLITE_UTF8, 0,
  rc = sqlite3_create_function(db, "uuid", 0, SQLITE_UTF8|SQLITE_INNOCUOUS, 0,
                               sqlite3UuidFunc, 0, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "uuid_str", 1, SQLITE_UTF8, 0,
                                 sqlite3UuidStrFunc, 0, 0);
    rc = sqlite3_create_function(db, "uuid_str", 1, 
                       SQLITE_UTF8|SQLITE_INNOCUOUS|SQLITE_DETERMINISTIC,
                       0, sqlite3UuidStrFunc, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(db, "uuid_blob", 1, SQLITE_UTF8, 0,
                                 sqlite3UuidBlobFunc, 0, 0);
    rc = sqlite3_create_function(db, "uuid_blob", 1,
                       SQLITE_UTF8|SQLITE_INNOCUOUS|SQLITE_DETERMINISTIC,
                       0, sqlite3UuidBlobFunc, 0, 0);
  }
  return rc;
}

  sqlite3_vtab **ppVtab,
  char **pzErr
){
  sqlite3_vtab *pNew;
  pNew = *ppVtab = sqlite3_malloc( sizeof(*pNew) );
  if( pNew==0 ) return SQLITE_NOMEM;
  sqlite3_declare_vtab(db, "CREATE TABLE x(value)");
  sqlite3_vtab_config(db, SQLITE_VTAB_INNOCUOUS);
  memset(pNew, 0, sizeof(*pNew));
  return SQLITE_OK;
}
/* Note that for this virtual table, the xCreate and xConnect
** methods are identical. */

static int wholenumberDisconnect(sqlite3_vtab *pVtab){

    pNew->aBuffer = (u8*)&pNew[1];
    if( zFile ){
      pNew->zFile = (char*)&pNew->aBuffer[ZIPFILE_BUFFER_SIZE];
      memcpy(pNew->zFile, zFile, nFile);
      zipfileDequote(pNew->zFile);
    }
  }
  sqlite3_vtab_config(db, SQLITE_VTAB_DIRECTONLY);
  *ppVtab = (sqlite3_vtab*)pNew;
  return rc;
}

/*
** Free the ZipfileEntry structure indicated by the only argument.
*/

    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;
    if( aFunc[i].bPure ){
    int enc = aFunc[i].bPure ? SQLITE_UTF8|SQLITE_DETERMINISTIC : SQLITE_UTF8;
      enc = SQLITE_UTF8|SQLITE_DETERMINISTIC|SQLITE_INNOCUOUS;
    }else{
      enc = SQLITE_UTF8|SQLITE_DIRECTONLY;
    }
    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);
    rc = sqlite3_create_function(db, aAgg[i].zName, 1, 
              SQLITE_UTF8|SQLITE_DETERMINISTIC|SQLITE_INNOCUOUS, 0,
              0, aAgg[i].xStep, aAgg[i].xFinal);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_module_v2(db, "geopoly", &geopolyModule, 0, 0);
  }
  return rc;
}

  db = pParse->db;
  assert( db->nDb>iDb );
  pFix->pParse = pParse;
  pFix->zDb = db->aDb[iDb].zDbSName;
  pFix->pSchema = db->aDb[iDb].pSchema;
  pFix->zType = zType;
  pFix->pName = pName;
  pFix->bVarOnly = (iDb==1);
  pFix->bTemp = (iDb==1);
}

/*
** The following set of routines walk through the parse tree and assign
** a specific database to all table references where the database name
** was left unspecified in the original SQL statement.  The pFix structure
** must have been initialized by a prior call to sqlite3FixInit().

  int i;
  const char *zDb;
  struct SrcList_item *pItem;

  if( NEVER(pList==0) ) return 0;
  zDb = pFix->zDb;
  for(i=0, pItem=pList->a; i<pList->nSrc; i++, pItem++){
    if( pFix->bVarOnly==0 ){
    if( pFix->bTemp==0 ){
      if( pItem->zDatabase && sqlite3StrICmp(pItem->zDatabase, zDb) ){
        sqlite3ErrorMsg(pFix->pParse,
            "%s %T cannot reference objects in database %s",
            pFix->zType, pFix->pName, pItem->zDatabase);
        return 1;
      }
      sqlite3DbFree(pFix->pParse->db, pItem->zDatabase);
      pItem->zDatabase = 0;
      pItem->pSchema = pFix->pSchema;
      pItem->fg.fromDDL = 1;
    }
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_TRIGGER)
    if( sqlite3FixSelect(pFix, pItem->pSelect) ) return 1;
    if( sqlite3FixExpr(pFix, pItem->pOn) ) return 1;
#endif
    if( pItem->fg.isTabFunc && sqlite3FixExprList(pFix, pItem->u1.pFuncArg) ){
      return 1;

  return 0;
}
int sqlite3FixExpr(
  DbFixer *pFix,     /* Context of the fixation */
  Expr *pExpr        /* The expression to be fixed to one database */
){
  while( pExpr ){
    ExprSetProperty(pExpr, EP_Indirect);
    if( !pFix->bTemp ) ExprSetProperty(pExpr, EP_FromDDL);
    if( pExpr->op==TK_VARIABLE ){
      if( pFix->pParse->db->init.busy ){
        pExpr->op = TK_NULL;
      }else{
        sqlite3ErrorMsg(pFix->pParse, "%s cannot use variables", pFix->zType);
        return 1;
      }

  const char *zEnd         /* First character past end of defaut value text */
){
  Table *p;
  Column *pCol;
  sqlite3 *db = pParse->db;
  p = pParse->pNewTable;
  if( p!=0 ){
    int isInit = db->init.busy && db->init.iDb!=1;
    pCol = &(p->aCol[p->nCol-1]);
    if( !sqlite3ExprIsConstantOrFunction(pExpr, db->init.busy) ){
    if( !sqlite3ExprIsConstantOrFunction(pExpr, isInit) ){
      sqlite3ErrorMsg(pParse, "default value of column [%s] is not constant",
          pCol->zName);
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
    }else if( pCol->colFlags & COLFLAG_GENERATED ){
      testcase( pCol->colFlags & COLFLAG_VIRTUAL );
      testcase( pCol->colFlags & COLFLAG_STORED );
      sqlite3ErrorMsg(pParse, "cannot use DEFAULT on a generated column");

#define FUNC_PERFECT_MATCH 6  /* The score for a perfect match */
static int matchQuality(
  FuncDef *p,     /* The function we are evaluating for match quality */
  int nArg,       /* Desired number of arguments.  (-1)==any */
  u8 enc          /* Desired text encoding */
){
  int match;
  assert( p->nArg>=-1 );

  /* Wrong number of arguments means "no match" */
  /* nArg of -2 is a special case */
  if( nArg==(-2) ) return (p->xSFunc==0) ? 0 : FUNC_PERFECT_MATCH;

  if( p->nArg!=nArg ){
    if( nArg==(-2) ) return (p->xSFunc==0) ? 0 : FUNC_PERFECT_MATCH;
    if( p->nArg>=0 ) return 0;
  }
  /* Wrong number of arguments means "no match" */
  if( p->nArg!=nArg && p->nArg>=0 ) return 0;

  /* Give a better score to a function with a specific number of arguments
  ** than to function that accepts any number of arguments. */
  if( p->nArg==nArg ){
    match = 4;
  }else{
    match = 1;

  int argc, const char *const*argv,
  sqlite3_vtab **ppVtab,
  char **pzErr
){
  DbpageTable *pTab = 0;
  int rc = SQLITE_OK;

  sqlite3_vtab_config(db, SQLITE_VTAB_DIRECTONLY);
  rc = sqlite3_declare_vtab(db, 
          "CREATE TABLE x(pgno INTEGER PRIMARY KEY, data BLOB, schema HIDDEN)");
  if( rc==SQLITE_OK ){
    pTab = (DbpageTable *)sqlite3_malloc64(sizeof(DbpageTable));
    if( pTab==0 ) rc = SQLITE_NOMEM_BKPT;
  }

    if( iDb<0 ){
      *pzErr = sqlite3_mprintf("no such database: %s", argv[3]);
      return SQLITE_ERROR;
    }
  }else{
    iDb = 0;
  }
  sqlite3_vtab_config(db, SQLITE_VTAB_DIRECTONLY);
  rc = sqlite3_declare_vtab(db, zDbstatSchema);
  if( rc==SQLITE_OK ){
    pTab = (StatTable *)sqlite3_malloc64(sizeof(StatTable));
    if( pTab==0 ) rc = SQLITE_NOMEM_BKPT;
  }

  assert( rc==SQLITE_OK || pTab==0 );

  pNew->x.pList = pList;
  ExprSetProperty(pNew, EP_HasFunc);
  assert( !ExprHasProperty(pNew, EP_xIsSelect) );
  sqlite3ExprSetHeightAndFlags(pParse, pNew);
  if( eDistinct==SF_Distinct ) ExprSetProperty(pNew, EP_Distinct);
  return pNew;
}

/*
** Check to see if a function is usable according to current access
** rules:
**
**    SQLITE_FUNC_DIRECT    -     Only usable from top-level SQL
**
**    SQLITE_FUNC_UNSAFE    -     Usable if TRUSTED_SCHEMA or from
**                                top-level SQL
**
** If the function is not usable, create an error.
*/
void sqlite3ExprFunctionUsable(
  Parse *pParse,         /* Parsing and code generating context */
  Expr *pExpr,           /* The function invocation */
  FuncDef *pDef          /* The function being invoked */
){
  assert( !IN_RENAME_OBJECT );
  assert( (pDef->funcFlags & (SQLITE_FUNC_DIRECT|SQLITE_FUNC_UNSAFE))!=0 );
  if( ExprHasProperty(pExpr, EP_FromDDL) ){
    if( (pDef->funcFlags & SQLITE_FUNC_DIRECT)!=0
     || (pParse->db->flags & SQLITE_TrustedSchema)==0
    ){
      /* Functions prohibited in triggers and views if:
      **     (1) tagged with SQLITE_DIRECTONLY
      **     (2) not tagged with SQLITE_INNOCUOUS (which means it
      **         is tagged with SQLITE_FUNC_UNSAFE) and 
      **         SQLITE_DBCONFIG_TRUSTED_SCHEMA is off (meaning
      **         that the schema is possibly tainted).
      */
      sqlite3ErrorMsg(pParse, "unsafe use of %s()", pDef->zName);
    }
  }
}

/*
** Assign a variable number to an expression that encodes a wildcard
** in the original SQL statement.  
**
** Wildcards consisting of a single "?" are assigned the next sequential
** variable number.

**     sqlite3ExprIsConstantNotJoin()           pWalker->eCode==2
**     sqlite3ExprIsTableConstant()             pWalker->eCode==3
**     sqlite3ExprIsConstantOrFunction()        pWalker->eCode==4 or 5
**
** In all cases, the callbacks set Walker.eCode=0 and abort if the expression
** is found to not be a constant.
**
** The sqlite3ExprIsConstantOrFunction() is used for evaluating expressions
** in a CREATE TABLE statement.  The Walker.eCode value is 5 when parsing
** an existing schema and 4 when processing a new statement.  A bound
** parameter raises an error for new statements, but is silently converted
** The sqlite3ExprIsConstantOrFunction() is used for evaluating DEFAULT
** expressions in a CREATE TABLE statement.  The Walker.eCode value is 5
** when parsing an existing schema out of the sqlite_master table and 4
** when processing a new CREATE TABLE statement.  A bound parameter raises
** an error for new statements, but is silently converted
** to NULL for existing schemas.  This allows sqlite_master tables that 
** contain a bound parameter because they were generated by older versions
** of SQLite to be parsed by newer versions of SQLite without raising a
** malformed schema error.
*/
static int exprNodeIsConstant(Walker *pWalker, Expr *pExpr){

    /* Consider functions to be constant if all their arguments are constant
    ** and either pWalker->eCode==4 or 5 or the function has the
    ** SQLITE_FUNC_CONST flag. */
    case TK_FUNCTION:
      if( (pWalker->eCode>=4 || ExprHasProperty(pExpr,EP_ConstFunc))
       && !ExprHasProperty(pExpr, EP_WinFunc)
      ){
        if( pWalker->eCode==5 ) ExprSetProperty(pExpr, EP_FromDDL);
        return WRC_Continue;
      }else{
        pWalker->eCode = 0;
        return WRC_Abort;
      }
    case TK_ID:
      /* Convert "true" or "false" in a DEFAULT clause into the

  w.u.pGroupBy = pGroupBy;
  w.pParse = pParse;
  sqlite3WalkExpr(&w, p);
  return w.eCode;
}

/*
** Walk an expression tree for the DEFAULT field of a column definition
** Walk an expression tree.  Return non-zero if the expression is constant
** or a function call with constant arguments.  Return and 0 if there
** are any variables.
** in a CREATE TABLE statement.  Return non-zero if the expression is 
** acceptable for use as a DEFAULT.  That is to say, return non-zero if
** the expression is constant or a function call with constant arguments.
** Return and 0 if there are any variables.
**
** isInit is true when parsing from sqlite_master.  isInit is false when
** processing a new CREATE TABLE statement.  When isInit is true, parameters
** (such as ? or $abc) in the expression are converted into NULL.  When
** isInit is false, parameters raise an error.  Parameters should not be
** allowed in a CREATE TABLE statement, but some legacy versions of SQLite
** allowed it, so we need to support it when reading sqlite_master for
** backwards compatibility.
**
** If isInit is true, set EP_FromDDL on every TK_FUNCTION node.
**
** For the purposes of this function, a double-quoted string (ex: "abc")
** is considered a variable but a single-quoted string (ex: 'abc') is
** a constant.
*/
int sqlite3ExprIsConstantOrFunction(Expr *p, u8 isInit){
  assert( isInit==0 || isInit==1 );

      }
#endif
      if( pDef==0 || pDef->xFinalize!=0 ){
        sqlite3ErrorMsg(pParse, "unknown function: %s()", zId);
        break;
      }
      if( pDef->funcFlags & SQLITE_FUNC_INLINE ){
        assert( (pDef->funcFlags & SQLITE_FUNC_UNSAFE)==0 );
        assert( (pDef->funcFlags & SQLITE_FUNC_DIRECT)==0 );
        return exprCodeInlineFunction(pParse, pFarg,
             SQLITE_PTR_TO_INT(pDef->pUserData), target);
      }else if( pDef->funcFlags & (SQLITE_FUNC_DIRECT|SQLITE_FUNC_UNSAFE) ){
        sqlite3ExprFunctionUsable(pParse, pExpr, pDef);
      }

      for(i=0; i<nFarg; i++){
        if( i<32 && sqlite3ExprIsConstant(pFarg->a[i].pExpr) ){
          testcase( i==31 );
          constMask |= MASKBIT32(i);
        }

        { SQLITE_DBCONFIG_DEFENSIVE,             SQLITE_Defensive      },
        { SQLITE_DBCONFIG_WRITABLE_SCHEMA,       SQLITE_WriteSchema|
                                                 SQLITE_NoSchemaError  },
        { SQLITE_DBCONFIG_LEGACY_ALTER_TABLE,    SQLITE_LegacyAlter    },
        { SQLITE_DBCONFIG_DQS_DDL,               SQLITE_DqsDDL         },
        { SQLITE_DBCONFIG_DQS_DML,               SQLITE_DqsDML         },
        { SQLITE_DBCONFIG_LEGACY_FILE_FORMAT,    SQLITE_LegacyFileFmt  },
        { SQLITE_DBCONFIG_TRUSTED_SCHEMA,        SQLITE_TrustedSchema  },
      };
      unsigned int i;
      rc = SQLITE_ERROR; /* IMP: R-42790-23372 */
      for(i=0; i<ArraySize(aFlagOp); i++){
        if( aFlagOp[i].op==op ){
          int onoff = va_arg(ap, int);
          int *pRes = va_arg(ap, int*);

   || (255<(nName = sqlite3Strlen30( zFunctionName)))
  ){
    return SQLITE_MISUSE_BKPT;
  }

  assert( SQLITE_FUNC_CONSTANT==SQLITE_DETERMINISTIC );
  assert( SQLITE_FUNC_DIRECT==SQLITE_DIRECTONLY );
  extraFlags = enc &  (SQLITE_DETERMINISTIC|SQLITE_DIRECTONLY|SQLITE_SUBTYPE);
  extraFlags = enc &  (SQLITE_DETERMINISTIC|SQLITE_DIRECTONLY|
                       SQLITE_SUBTYPE|SQLITE_INNOCUOUS);
  enc &= (SQLITE_FUNC_ENCMASK|SQLITE_ANY);

  /* The SQLITE_INNOCUOUS flag is the same bit as SQLITE_FUNC_UNSAFE.  But
  ** the meaning is inverted.  So flip the bit. */
  assert( SQLITE_FUNC_UNSAFE==SQLITE_INNOCUOUS );
  extraFlags ^= SQLITE_FUNC_UNSAFE;

  
#ifndef SQLITE_OMIT_UTF16
  /* If SQLITE_UTF16 is specified as the encoding type, transform this
  ** to one of SQLITE_UTF16LE or SQLITE_UTF16BE using the
  ** SQLITE_UTF16NATIVE macro. SQLITE_UTF16 is not used internally.
  **
  ** If SQLITE_ANY is specified, add three versions of the function
  ** to the hash table.
  */
  if( enc==SQLITE_UTF16 ){
    enc = SQLITE_UTF16NATIVE;
  }else if( enc==SQLITE_ANY ){
    int rc;
    rc = sqlite3CreateFunc(db, zFunctionName, nArg, SQLITE_UTF8|extraFlags,
    rc = sqlite3CreateFunc(db, zFunctionName, nArg,
         (SQLITE_UTF8|extraFlags)^SQLITE_FUNC_UNSAFE,
         pUserData, xSFunc, xStep, xFinal, xValue, xInverse, pDestructor);
    if( rc==SQLITE_OK ){
      rc = sqlite3CreateFunc(db, zFunctionName, nArg, SQLITE_UTF16LE|extraFlags,
          pUserData, xSFunc, xStep, xFinal, xValue, xInverse, pDestructor);
      rc = sqlite3CreateFunc(db, zFunctionName, nArg,
           (SQLITE_UTF16LE|extraFlags)^SQLITE_FUNC_UNSAFE,
           pUserData, xSFunc, xStep, xFinal, xValue, xInverse, pDestructor);
    }
    if( rc!=SQLITE_OK ){
      return rc;
    }
    enc = SQLITE_UTF16BE;
  }
#else

  db->szMmap = sqlite3GlobalConfig.szMmap;
  db->nextPagesize = 0;
  db->nMaxSorterMmap = 0x7FFFFFFF;
  db->flags |= SQLITE_ShortColNames
                 | SQLITE_EnableTrigger
                 | SQLITE_EnableView
                 | SQLITE_CacheSpill

#if !defined(SQLITE_TRUSTED_SCHEMA) || SQLITE_TRUSTED_SCHEMA+0!=0
                 | SQLITE_TrustedSchema
#endif
/* The SQLITE_DQS compile-time option determines the default settings
** for SQLITE_DBCONFIG_DQS_DDL and SQLITE_DBCONFIG_DQS_DML.
**
**    SQLITE_DQS     SQLITE_DBCONFIG_DQS_DDL    SQLITE_DBCONFIG_DQS_DML
**    ----------     -----------------------    -----------------------
**     undefined               on                          on   
**         3                   on                          on

      upr = mid - 1;
    }else{
      lwr = mid + 1;
    }
  }
  return lwr>upr ? 0 : &aPragmaName[mid];
}

/*
** Create zero or more entries in the output for the SQL functions
** defined by FuncDef p.
*/
static void pragmaFunclistLine(
  Vdbe *v,               /* The prepared statement being created */
  FuncDef *p,            /* A particular function definition */
  int isBuiltin,         /* True if this is a built-in function */
  int showInternFuncs    /* True if showing internal functions */
){
  for(; p; p=p->pNext){
    const char *zType;
    static const u32 mask = 
        SQLITE_DETERMINISTIC |
        SQLITE_DIRECTONLY |
        SQLITE_SUBTYPE |
        SQLITE_INNOCUOUS |
        SQLITE_FUNC_INTERNAL
    ;
    static const char *azEnc[] = { 0, "utf8", "utf16le", "utf16be" };

    assert( SQLITE_FUNC_ENCMASK==0x3 );
    assert( strcmp(azEnc[SQLITE_UTF8],"utf8")==0 );
    assert( strcmp(azEnc[SQLITE_UTF16LE],"utf16le")==0 );
    assert( strcmp(azEnc[SQLITE_UTF16BE],"utf16be")==0 );

    if( p->xSFunc==0 ) continue;
    if( (p->funcFlags & SQLITE_FUNC_INTERNAL)!=0
     && showInternFuncs==0
    ){
      continue;
    }    
    if( p->xValue!=0 ){
      zType = "w";
    }else if( p->xFinalize!=0 ){
      zType = "a";
    }else{
      zType = "s";
    }
    sqlite3VdbeMultiLoad(v, 1, "sissii",
       p->zName, isBuiltin,
       zType, azEnc[p->funcFlags&SQLITE_FUNC_ENCMASK],
       p->nArg,
       (p->funcFlags & mask) ^ SQLITE_INNOCUOUS
    );
  }
}


/*
** Helper subroutine for PRAGMA integrity_check:
**
** Generate code to output a single-column result row with a value of the
** string held in register 3.  Decrement the result count in register 1
** and halt if the maximum number of result rows have been issued.

  break;

#ifndef SQLITE_OMIT_INTROSPECTION_PRAGMAS
  case PragTyp_FUNCTION_LIST: {
    int i;
    HashElem *j;
    FuncDef *p;
    int showInternFunc = (db->mDbFlags & DBFLAG_InternalFunc)!=0;
    pParse->nMem = 2;
    pParse->nMem = 6;
    for(i=0; i<SQLITE_FUNC_HASH_SZ; i++){
      for(p=sqlite3BuiltinFunctions.a[i]; p; p=p->u.pHash ){
        if( p->funcFlags & SQLITE_FUNC_INTERNAL ) continue;
        sqlite3VdbeMultiLoad(v, 1, "si", p->zName, 1);
        pragmaFunclistLine(v, p, 1, showInternFunc);
      }
    }
    for(j=sqliteHashFirst(&db->aFunc); j; j=sqliteHashNext(j)){
      p = (FuncDef*)sqliteHashData(j);
      sqlite3VdbeMultiLoad(v, 1, "si", p->zName, 0);
      pragmaFunclistLine(v, p, 0, showInternFunc);
    }
  }
  break;

#ifndef SQLITE_OMIT_VIRTUALTABLE
  case PragTyp_MODULE_LIST: {
    HashElem *j;

                           /* 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",       
  /*  21 */ "name",        /* Used by: function_list */
  /*  22 */ "builtin",    
  /*  23 */ "type",       
  /*  24 */ "enc",        
  /*  25 */ "narg",       
  /*  26 */ "flags",      
  /*  27 */ "tbl",         /* Used by: stats */
  /*  28 */ "idx",        
  /*  29 */ "wdth",       
  /*  30 */ "hght",       
  /*  31 */ "flgs",       
  /*  32 */ "seq",         /* Used by: index_list */
  /*  33 */ "name",       
  /*  34 */ "unique",     
                           /* 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 */
  /*  35 */ "origin",     
  /*  36 */ "partial",    
  /*  37 */ "table",       /* Used by: foreign_key_check */
  /*  38 */ "rowid",      
  /*  39 */ "parent",     
  /*  40 */ "fkid",       
                           /* index_info reuses 15 */
  /*  41 */ "seq",         /* Used by: database_list */
  /*  42 */ "name",       
  /*  43 */ "file",       
  /*  44 */ "busy",        /* Used by: wal_checkpoint */
  /*  45 */ "log",        
  /*  46 */ "checkpointed",
                           /* collation_list reuses 32 */
  /*  47 */ "database",    /* Used by: lock_status */
  /*  48 */ "status",     
  /*  49 */ "cache_size",  /* Used by: default_cache_size */
                           /* module_list pragma_list reuses 9 */
  /*  46 */ "timeout",     /* Used by: busy_timeout */
  /*  50 */ "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,
  /* ColNames:  */ 50, 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,
  /* 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:  */ 35, 3,
  /* ColNames:  */ 41, 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,
  /* ColNames:  */ 49, 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,
  /* ColNames:  */ 37, 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:      */ SQLITE_FullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if !defined(SQLITE_OMIT_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "function_list",
  /* ePragTyp:  */ PragTyp_FUNCTION_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 41, 2,
  /* ColNames:  */ 21, 6,
  /* iArg:      */ 0 },
#endif
#endif
 {/* zName:     */ "hard_heap_limit",
  /* ePragTyp:  */ PragTyp_HARD_HEAP_LIMIT,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,

  /* 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,
  /* ColNames:  */ 32, 5,
  /* iArg:      */ 0 },
 {/* zName:     */ "index_xinfo",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 15, 6,
  /* iArg:      */ 1 },
#endif

  /* 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,
  /* ColNames:  */ 47, 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,

  /* 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,
  /* ColNames:  */ 27, 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:      */ 5 },
#endif
 {/* zName:     */ "threads",
  /* ePragTyp:  */ PragTyp_THREADS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "trusted_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_TrustedSchema },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
 {/* zName:     */ "user_version",
  /* ePragTyp:  */ PragTyp_HEADER_VALUE,
  /* ePragFlg:  */ PragFlg_NoColumns1|PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_USER_VERSION },
#endif

  /* ePragTyp:  */ PragTyp_WAL_AUTOCHECKPOINT,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "wal_checkpoint",
  /* ePragTyp:  */ PragTyp_WAL_CHECKPOINT,
  /* ePragFlg:  */ PragFlg_NeedSchema,
  /* ColNames:  */ 38, 3,
  /* ColNames:  */ 44, 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|SQLITE_NoSchemaError },
#endif
};
/* Number of pragmas: 65 on by default, 81 total. */
/* Number of pragmas: 66 on by default, 82 total. */

          ** sqlite_version() that might change over time cannot be used
          ** in an index. */
          sqlite3ResolveNotValid(pParse, pNC, "non-deterministic functions",
                                 NC_SelfRef, 0);
        }else{
          assert( (NC_SelfRef & 0xff)==NC_SelfRef ); /* Must fit in 8 bits */
          pExpr->op2 = pNC->ncFlags & NC_SelfRef;
          if( pNC->ncFlags & NC_FromDDL ) ExprSetProperty(pExpr, EP_FromDDL);
        }
        if( (pDef->funcFlags & SQLITE_FUNC_INTERNAL)!=0
         && pParse->nested==0
         && (pParse->db->mDbFlags & DBFLAG_InternalFunc)==0
        ){
          /* Internal-use-only functions are disallowed unless the
          ** SQL is being compiled using sqlite3NestedParse() */
          ** SQL is being compiled using sqlite3NestedParse() or
          ** the SQLITE_TESTCTRL_INTERNAL_FUNCTIONS test-control has be
          ** used to activate internal functionsn for testing purposes */
          no_such_func = 1;
          pDef = 0;
        }else
        if( (pDef->funcFlags & SQLITE_FUNC_DIRECT)!=0
        if( (pDef->funcFlags & (SQLITE_FUNC_DIRECT|SQLITE_FUNC_UNSAFE))!=0
         && ExprHasProperty(pExpr, EP_Indirect)
         && !IN_RENAME_OBJECT
        ){
          /* Functions tagged with SQLITE_DIRECTONLY may not be used
          ** inside of triggers and views */
          sqlite3ErrorMsg(pParse, "%s() prohibited in triggers and views",
          sqlite3ExprFunctionUsable(pParse, pExpr, pDef);
                          pDef->zName);
        }
      }

      if( 0==IN_RENAME_OBJECT ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        assert( is_agg==0 || (pDef->funcFlags & SQLITE_FUNC_MINMAX)
          || (pDef->xValue==0 && pDef->xInverse==0)

  memset(&sNC, 0, sizeof(sNC));
  memset(&sSrc, 0, sizeof(sSrc));
  if( pTab ){
    sSrc.nSrc = 1;
    sSrc.a[0].zName = pTab->zName;
    sSrc.a[0].pTab = pTab;
    sSrc.a[0].iCursor = -1;
    if( pTab->pSchema!=pParse->db->aDb[1].pSchema ){
      /* Cause EP_FromDDL to be set on TK_FUNCTION nodes of non-TEMP
      ** schema elements */
      type |= NC_FromDDL;
    }
  }
  sNC.pParse = pParse;
  sNC.pSrcList = &sSrc;
  sNC.ncFlags = type | NC_IsDDL;
  if( (rc = sqlite3ResolveExprNames(&sNC, pExpr))!=SQLITE_OK ) return rc;
  if( pList ) rc = sqlite3ResolveExprListNames(&sNC, pList);
  return rc;
}

      if( IsVirtual(pTab) || pTab->pSelect ){
        i16 nCol;
        u8 eCodeOrig = pWalker->eCode;
        if( sqlite3ViewGetColumnNames(pParse, pTab) ) return WRC_Abort;
        assert( pFrom->pSelect==0 );
        if( pTab->pSelect && (db->flags & SQLITE_EnableView)==0 ){
          sqlite3ErrorMsg(pParse, "access to view \"%s\" prohibited",
              pTab->zName);
            pTab->zName);
        }
        if( IsVirtual(pTab)
         && pFrom->fg.fromDDL
         && ALWAYS(pTab->pVTable!=0)
         && pTab->pVTable->eVtabRisk > ((db->flags & SQLITE_TrustedSchema)!=0)
        ){
          sqlite3ErrorMsg(pParse, "unsafe use of virtual table \"%s\"",
                                  pTab->zName);
        }
        pFrom->pSelect = sqlite3SelectDup(db, pTab->pSelect, 0);
        nCol = pTab->nCol;
        pTab->nCol = -1;
        pWalker->eCode = 1;  /* Turn on Select.selId renumbering */
        sqlite3WalkSelect(pWalker, pFrom->pSelect);
        pWalker->eCode = eCodeOrig;

  }else

  if( c=='d' && n>=3 && strncmp(azArg[0], "dbconfig", n)==0 ){
    static const struct DbConfigChoices {
      const char *zName;
      int op;
    } aDbConfig[] = {
        { "defensive",          SQLITE_DBCONFIG_DEFENSIVE             },
        { "dqs_ddl",            SQLITE_DBCONFIG_DQS_DDL               },
        { "dqs_dml",            SQLITE_DBCONFIG_DQS_DML               },
        { "enable_fkey",        SQLITE_DBCONFIG_ENABLE_FKEY           },
        { "enable_qpsg",        SQLITE_DBCONFIG_ENABLE_QPSG           },
        { "enable_trigger",     SQLITE_DBCONFIG_ENABLE_TRIGGER        },
        { "enable_view",        SQLITE_DBCONFIG_ENABLE_VIEW           },
        { "fts3_tokenizer",     SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER },
        { "legacy_alter_table", SQLITE_DBCONFIG_LEGACY_ALTER_TABLE    },
        { "legacy_file_format", SQLITE_DBCONFIG_LEGACY_FILE_FORMAT    },
        { "load_extension",     SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION },
        { "no_ckpt_on_close",   SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE      },
        { "enable_qpsg",        SQLITE_DBCONFIG_ENABLE_QPSG           },
        { "reset_database",     SQLITE_DBCONFIG_RESET_DATABASE        },
        { "trigger_eqp",        SQLITE_DBCONFIG_TRIGGER_EQP           },
        { "reset_database",     SQLITE_DBCONFIG_RESET_DATABASE        },
        { "trusted_schema",     SQLITE_DBCONFIG_TRUSTED_SCHEMA        },
        { "defensive",          SQLITE_DBCONFIG_DEFENSIVE             },
        { "writable_schema",    SQLITE_DBCONFIG_WRITABLE_SCHEMA       },
        { "legacy_alter_table", SQLITE_DBCONFIG_LEGACY_ALTER_TABLE    },
        { "dqs_dml",            SQLITE_DBCONFIG_DQS_DML               },
        { "dqs_ddl",            SQLITE_DBCONFIG_DQS_DDL               },
        { "legacy_file_format", SQLITE_DBCONFIG_LEGACY_FILE_FORMAT    },
    };
    int ii, v;
    open_db(p, 0);
    for(ii=0; ii<ArraySize(aDbConfig); ii++){
      if( nArg>1 && strcmp(azArg[1], aDbConfig[ii].zName)!=0 ) continue;
      if( nArg>=3 ){
        sqlite3_db_config(p->db, aDbConfig[ii].op, booleanValue(azArg[2]), 0);
      }
      sqlite3_db_config(p->db, aDbConfig[ii].op, -1, &v);
      utf8_printf(p->out, "%18s %s\n", aDbConfig[ii].zName, v ? "on" : "off");
      utf8_printf(p->out, "%19s %s\n", aDbConfig[ii].zName, v ? "on" : "off");
      if( nArg>1 ) break;
    }
    if( nArg>1 && ii==ArraySize(aDbConfig) ){
      utf8_printf(stderr, "Error: unknown dbconfig \"%s\"\n", azArg[1]);
      utf8_printf(stderr, "Enter \".dbconfig\" with no arguments for a list\n");
    }   
  }else

** <dt>SQLITE_DBCONFIG_DQS_DDL</td>
** <dd>The SQLITE_DBCONFIG_DQS option activates or deactivates
** the legacy [double-quoted string literal] misfeature for DDL statements,
** such as CREATE TABLE and CREATE INDEX. The
** default value of this setting is determined by the [-DSQLITE_DQS]
** compile-time option.
** </dd>
**
** [[SQLITE_DBCONFIG_TRUSTED_SCHEMA]]
** <dt>SQLITE_DBCONFIG_TRUSTED_SCHEMA</td>
** <dd>The SQLITE_DBCONFIG_TRUSTED_SCHEMA option tells the SQLite to
** assume that database schemas are untainted by malicious content.
** When the SQLITE_DBCONFIG_TRUSTED_SCHEMA option is disabled, SQLite
** takes additional defensive steps to protect the application from harm
** including, but not limited to, the following:
** <ul>
** <li> Prohibit the use of SQL functions inside triggers, views,
** CHECK constraints, DEFAULT VALUEs, index definitions, and/or
** generated columns unless those functions are tagged
** with [SQLITE_INNOCUOUS].
** <li> Pohibit the use of virtual tables inside of triggers and/or views
** unless those virtual tables are tagged with [SQLITE_VTAB_INNOCUOUS].
** </ul>
** This setting defaults to "on" for legacy compatibility, however
** all applications are advised to turn it off if possible.
** </dd>
**
** [[SQLITE_DBCONFIG_LEGACY_FILE_FORMAT]]
** <dt>SQLITE_DBCONFIG_LEGACY_FILE_FORMAT</td>
** <dd>The SQLITE_DBCONFIG_LEGACY_FILE_FORMAT option activates or deactivates
** the legacy file format flag.  When activated, this flag causes all newly
** created database file to have a schema format version number (the 4-byte
** integer found at offset 44 into the database header) of 1.  This in turn

#define SQLITE_DBCONFIG_DEFENSIVE             1010 /* int int* */
#define SQLITE_DBCONFIG_WRITABLE_SCHEMA       1011 /* int int* */
#define SQLITE_DBCONFIG_LEGACY_ALTER_TABLE    1012 /* int int* */
#define SQLITE_DBCONFIG_DQS_DML               1013 /* int int* */
#define SQLITE_DBCONFIG_DQS_DDL               1014 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_VIEW           1015 /* int int* */
#define SQLITE_DBCONFIG_LEGACY_FILE_FORMAT    1016 /* int int* */
#define SQLITE_DBCONFIG_TRUSTED_SCHEMA        1017 /* int int* */
#define SQLITE_DBCONFIG_MAX                   1016 /* Largest DBCONFIG */
#define SQLITE_DBCONFIG_MAX                   1017 /* Largest DBCONFIG */

/*
** CAPI3REF: Enable Or Disable Extended Result Codes
** METHOD: sqlite3
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
** [extended result codes] feature of SQLite. ^The extended result

**
** These constants may be ORed together with the 
** [SQLITE_UTF8 | preferred text encoding] as the fourth argument
** to [sqlite3_create_function()], [sqlite3_create_function16()], or
** [sqlite3_create_function_v2()].
**
** The SQLITE_DETERMINISTIC flag means that the new function always gives
** the same output when the input parameters are the same. The abs() function
** is deterministic, for example, but randomblob() is not.  Functions must
** the same output when the input parameters are the same.
** The [abs|abs() function] is deterministic, for example, but
** [randomblob|randomblob()] is not.  Functions must
** be deterministic in order to be used in certain contexts such as
** [CHECK constraints] or [generated columns].  SQLite might also optimize
** deterministic functions by factoring them out of inner loops.
**
** The SQLITE_INNOCUOUS flag means that the new function is unlikely
** to cause problems even if misused.  An innocuous function should have
** no side effects and consume few resources. The [abs|abs() function] 
** is an example of an innocuous function.
** The [load_extension() SQL function] is not innocuous because of its
** side effects.  Some heightened security settings
** ([SQLITE_DBCONFIG_UNSAFE_FUNC_IN_VIEW])
** disable the use of SQLlfunctions inside views and triggers unless
** the function is tagged with SQLITE_INNOCUOUS.  Most built-in functions
** are innocuous.  Developers are advised to avoid using the
** SQLITE_INNOCUOUS flag for application-defined functions unless the
** function is specifically intended for use inside of views and triggers.
**
** The SQLITE_DIRECTONLY flag means that the function may only be invoked
** from top-level SQL, and cannot be used in VIEWs or TRIGGERs.  This is
** a security feature which is recommended for all 
** [application-defined SQL functions] that have side-effects.  This flag 
** prevents an attacker from adding triggers and views to a schema then 
** tricking a high-privilege application into causing unintended side-effects
** while performing ordinary queries.
**
** The SQLITE_SUBTYPE flag indicates to SQLite that a function may call
** [sqlite3_value_subtype()] to inspect the sub-types of its arguments.
** Specifying this flag makes no difference for scalar or aggregate user
** functions. However, if it is not specified for a user-defined window
** function, then any sub-types belonging to arguments passed to the window
** function may be discarded before the window function is called (i.e.
** sqlite3_value_subtype() will always return 0).
*/
#define SQLITE_DETERMINISTIC    0x000000800
#define SQLITE_DIRECTONLY       0x000080000
#define SQLITE_SUBTYPE          0x000100000
#define SQLITE_INNOCUOUS        0x000200000

/*
** CAPI3REF: Deprecated Functions
** DEPRECATED
**
** These functions are [deprecated].  In order to maintain
** backwards compatibility with older code, these functions continue 

**
** These macros define the various options to the
** [sqlite3_vtab_config()] interface that [virtual table] implementations
** can use to customize and optimize their behavior.
**
** <dl>
** [[SQLITE_VTAB_CONSTRAINT_SUPPORT]]
** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT
** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT</dt>
** <dd>Calls of the form
** [sqlite3_vtab_config](db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported,
** where X is an integer.  If X is zero, then the [virtual table] whose
** [xCreate] or [xConnect] method invoked [sqlite3_vtab_config()] does not
** support constraints.  In this configuration (which is the default) if
** a call to the [xUpdate] method returns [SQLITE_CONSTRAINT], then the entire
** statement is rolled back as if [ON CONFLICT | OR ABORT] had been

** must do so within the [xUpdate] method. If a call to the 
** [sqlite3_vtab_on_conflict()] function indicates that the current ON 
** CONFLICT policy is REPLACE, the virtual table implementation should 
** silently replace the appropriate rows within the xUpdate callback and
** return SQLITE_OK. Or, if this is not possible, it may return
** SQLITE_CONSTRAINT, in which case SQLite falls back to OR ABORT 
** constraint handling.
** </dd>
**
** [[SQLITE_VTAB_INNOCUOUS]]<dt>SQLITE_VTAB_INNOCUOUS</dt>
** <dd>Calls of the form
** [sqlite3_vtab_config](db,SQLITE_VTAB_INNOCUOUS) from within the
** the [xConnect] or [xCreate] methods of a [virtual table] implmentation
** identify that virtual table as being safe to use from within triggers
** and views.  Conceptually, the SQLITE_VTAB_INNOCUOUS tag means that the
** virtual table can do no serious harm even if it is controlled by a
** malicious hacker.  Developers should avoid setting the SQLITE_VTAB_INNOCUOUS
** flag unless absolutely necessary.
** </dd>
**
** [[SQLITE_VTAB_DIRECTONLY]]<dt>SQLITE_VTAB_DIRECTONLY</dt>
** <dd>Calls of the form
** [sqlite3_vtab_config](db,SQLITE_VTAB_DIRECTONLY) from within the
** the [xConnect] or [xCreate] methods of a [virtual table] implmentation
** prohibits that virtual table from being used from within triggers and
** views.
** </dd>
** </dl>
*/
#define SQLITE_VTAB_CONSTRAINT_SUPPORT 1
#define SQLITE_VTAB_INNOCUOUS          2
#define SQLITE_VTAB_DIRECTONLY         3

/*
** CAPI3REF: Determine The Virtual Table Conflict Policy
**
** This function may only be called from within a call to the [xUpdate] method
** of a [virtual table] implementation for an INSERT or UPDATE operation. ^The
** value returned is one of [SQLITE_ROLLBACK], [SQLITE_IGNORE], [SQLITE_FAIL],

*/
#define BMS  ((int)(sizeof(Bitmask)*8))

/*
** A bit in a Bitmask
*/
#define MASKBIT(n)   (((Bitmask)1)<<(n))
#define MASKBIT64(n) (((u64)1)<<(n))
#define MASKBIT32(n) (((unsigned int)1)<<(n))
#define ALLBITS      ((Bitmask)-1)

/* A VList object records a mapping between parameters/variables/wildcards
** in the SQL statement (such as $abc, @pqr, or :xyz) and the integer
** variable number associated with that parameter.  See the format description
** on the sqlite3VListAdd() routine for more information.  A VList is really

/*
** A macro to discover the encoding of a database.
*/
#define SCHEMA_ENC(db) ((db)->aDb[0].pSchema->enc)
#define ENC(db)        ((db)->enc)

/*
** A u64 constant where the lower 32 bits are all zeros.  Only the
** upper 32 bits are included in the argument.  Necessary because some
** C-compilers still do not accept LL integer literals.
*/
#define HI(X)  ((u64)(X)<<32)

/*
** Possible values for the sqlite3.flags.
**
** Value constraints (enforced via assert()):
**      SQLITE_FullFSync     == PAGER_FULLFSYNC
**      SQLITE_CkptFullFSync == PAGER_CKPT_FULLFSYNC
**      SQLITE_CacheSpill    == PAGER_CACHE_SPILL
*/
#define SQLITE_WriteSchema    0x00000001  /* OK to update SQLITE_MASTER */
#define SQLITE_LegacyFileFmt  0x00000002  /* Create new databases in format 1 */
#define SQLITE_FullColNames   0x00000004  /* Show full column names on SELECT */
#define SQLITE_FullFSync      0x00000008  /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync  0x00000010  /* Use full fsync for checkpoint */
#define SQLITE_CacheSpill     0x00000020  /* OK to spill pager cache */
#define SQLITE_ShortColNames  0x00000040  /* Show short columns names */
#define SQLITE_CountRows      0x00000080  /* Count rows changed by INSERT, */
                                          /*   DELETE, or UPDATE and return */
#define SQLITE_TrustedSchema  0x00000080  /* Allow unsafe functions and
                                          ** vtabs in the schema definition */
                                          /*   the count using a callback. */
#define SQLITE_NullCallback   0x00000100  /* Invoke the callback once if the */
                                          /*   result set is empty */
#define SQLITE_IgnoreChecks   0x00000200  /* Do not enforce check constraints */
#define SQLITE_ReadUncommit   0x00000400  /* READ UNCOMMITTED in shared-cache */
#define SQLITE_NoCkptOnClose  0x00000800  /* No checkpoint on close()/DETACH */
#define SQLITE_ReverseOrder   0x00001000  /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers    0x00002000  /* Enable recursive triggers */

#define SQLITE_ResetDatabase  0x02000000  /* Reset the database */
#define SQLITE_LegacyAlter    0x04000000  /* Legacy ALTER TABLE behaviour */
#define SQLITE_NoSchemaError  0x08000000  /* Do not report schema parse errors*/
#define SQLITE_Defensive      0x10000000  /* Input SQL is likely hostile */
#define SQLITE_DqsDDL         0x20000000  /* dbl-quoted strings allowed in DDL*/
#define SQLITE_DqsDML         0x40000000  /* dbl-quoted strings allowed in DML*/
#define SQLITE_EnableView     0x80000000  /* Enable the use of views */
#define SQLITE_CountRows      HI(0x00001) /* Count rows changed by INSERT, */
                                          /*   DELETE, or UPDATE and return */
                                          /*   the count using a callback. */

/* Flags used only if debugging */
#define HI(X)  ((u64)(X)<<32)
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       HI(0x0100000) /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    HI(0x0200000) /* Debug listings of VDBE progs */
#define SQLITE_VdbeTrace      HI(0x0400000) /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace HI(0x0800000) /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_VdbeEQP        HI(0x1000000) /* Debug EXPLAIN QUERY PLAN */
#define SQLITE_ParserTrace    HI(0x2000000) /* PRAGMA parser_trace=ON */

**
** Value constraints (enforced via assert()):
**     SQLITE_FUNC_MINMAX    ==  NC_MinMaxAgg      == SF_MinMaxAgg
**     SQLITE_FUNC_LENGTH    ==  OPFLAG_LENGTHARG
**     SQLITE_FUNC_TYPEOF    ==  OPFLAG_TYPEOFARG
**     SQLITE_FUNC_CONSTANT  ==  SQLITE_DETERMINISTIC from the API
**     SQLITE_FUNC_DIRECT    ==  SQLITE_DIRECTONLY from the API
**     SQLITE_FUNC_UNSAFE    ==  SQLITE_INNOCUOUS
**     SQLITE_FUNC_ENCMASK   depends on SQLITE_UTF* macros in the API
*/
#define SQLITE_FUNC_ENCMASK  0x0003 /* SQLITE_UTF8, SQLITE_UTF16BE or UTF16LE */
#define SQLITE_FUNC_LIKE     0x0004 /* Candidate for the LIKE optimization */
#define SQLITE_FUNC_CASE     0x0008 /* Case-sensitive LIKE-type function */
#define SQLITE_FUNC_EPHEM    0x0010 /* Ephemeral.  Delete with VDBE */
#define SQLITE_FUNC_NEEDCOLL 0x0020 /* sqlite3GetFuncCollSeq() might be called*/

                                    ** single query - might change over time */
#define SQLITE_FUNC_TEST     0x4000 /* Built-in testing functions */
#define SQLITE_FUNC_OFFSET   0x8000 /* Built-in sqlite_offset() function */
#define SQLITE_FUNC_WINDOW   0x00010000 /* Built-in window-only function */
#define SQLITE_FUNC_INTERNAL 0x00040000 /* For use by NestedParse() only */
#define SQLITE_FUNC_DIRECT   0x00080000 /* Not for use in TRIGGERs or VIEWs */
#define SQLITE_FUNC_SUBTYPE  0x00100000 /* Result likely to have sub-type */
#define SQLITE_FUNC_UNSAFE   0x00200000 /* Function has side effects */
#define SQLITE_FUNC_INLINE   0x00200000 /* Functions implemented in-line */
#define SQLITE_FUNC_INLINE   0x00400000 /* Functions implemented in-line */

/* Identifier numbers for each in-line function */
#define INLINEFUNC_coalesce             0
#define INLINEFUNC_implies_nonnull_row  1
#define INLINEFUNC_expr_implies_expr    2
#define INLINEFUNC_expr_compare         3      
#define INLINEFUNC_affinity             4

#define FUNCTION(zName, nArg, iArg, bNC, xFunc) \
  {nArg, SQLITE_FUNC_CONSTANT|SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \
   SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
#define VFUNCTION(zName, nArg, iArg, bNC, xFunc) \
  {nArg, SQLITE_UTF8|(bNC*SQLITE_FUNC_NEEDCOLL), \
   SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
#define SFUNCTION(zName, nArg, iArg, bNC, xFunc) \
  {nArg, SQLITE_UTF8|SQLITE_DIRECTONLY, \
  {nArg, SQLITE_UTF8|SQLITE_DIRECTONLY|SQLITE_FUNC_UNSAFE, \
   SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
#define INLINE_FUNC(zName, nArg, iArg, mFlags) \
  {nArg, SQLITE_UTF8|SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \
   SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} }
#define TEST_FUNC(zName, nArg, iArg, mFlags) \
  {nArg, SQLITE_UTF8|SQLITE_FUNC_INTERNAL|SQLITE_FUNC_TEST| \
         SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \

*/
struct VTable {
  sqlite3 *db;              /* Database connection associated with this table */
  Module *pMod;             /* Pointer to module implementation */
  sqlite3_vtab *pVtab;      /* Pointer to vtab instance */
  int nRef;                 /* Number of pointers to this structure */
  u8 bConstraint;           /* True if constraints are supported */
  u8 eVtabRisk;             /* Riskiness of allowing hacker access */
  int iSavepoint;           /* Depth of the SAVEPOINT stack */
  VTable *pNext;            /* Next in linked list (see above) */
};

/* Allowed values for VTable.eVtabRisk
*/
#define SQLITE_VTABRISK_Low          0
#define SQLITE_VTABRISK_Normal       1
#define SQLITE_VTABRISK_High         2

/*
** The schema for each SQL table and view is represented in memory
** by an instance of the following structure.
*/
struct Table {
  char *zName;         /* Name of the table or view */

#define EP_Leaf       0x800000 /* Expr.pLeft, .pRight, .u.pSelect all NULL */
#define EP_WinFunc   0x1000000 /* TK_FUNCTION with Expr.y.pWin set */
#define EP_Subrtn    0x2000000 /* Uses Expr.y.sub. TK_IN, _SELECT, or _EXISTS */
#define EP_Quoted    0x4000000 /* TK_ID was originally quoted */
#define EP_Static    0x8000000 /* Held in memory not obtained from malloc() */
#define EP_IsTrue   0x10000000 /* Always has boolean value of TRUE */
#define EP_IsFalse  0x20000000 /* Always has boolean value of FALSE */
#define EP_Indirect 0x40000000 /* Contained within a TRIGGER or a VIEW */
#define EP_FromDDL  0x40000000 /* Originates from sqlite_master */

/*
** 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)

      u8 jointype;      /* Type of join between this table and the previous */
      unsigned notIndexed :1;    /* True if there is a NOT INDEXED clause */
      unsigned isIndexedBy :1;   /* True if there is an INDEXED BY clause */
      unsigned isTabFunc :1;     /* True if table-valued-function syntax */
      unsigned isCorrelated :1;  /* True if sub-query is correlated */
      unsigned viaCoroutine :1;  /* Implemented as a co-routine */
      unsigned isRecursive :1;   /* True for recursive reference in WITH */
      unsigned fromDDL :1;       /* Comes from sqlite_master */
    } fg;
    int iCursor;      /* The VDBE cursor number used to access this table */
    Expr *pOn;        /* The ON clause of a join */
    IdList *pUsing;   /* The USING clause of a join */
    Bitmask colUsed;  /* Bit N (1<<N) set if column N of pTab is used */
    union {
      char *zIndexedBy;    /* Identifier from "INDEXED BY <zIndex>" clause */

#define NC_UUpsert   0x00200  /* True if uNC.pUpsert is used */
#define NC_MinMaxAgg 0x01000  /* min/max aggregates seen.  See note above */
#define NC_Complex   0x02000  /* True if a function or subquery seen */
#define NC_AllowWin  0x04000  /* Window functions are allowed here */
#define NC_HasWin    0x08000  /* One or more window functions seen */
#define NC_IsDDL     0x10000  /* Resolving names in a CREATE statement */
#define NC_InAggFunc 0x20000  /* True if analyzing arguments to an agg func */
#define NC_FromDDL   0x40000  /* SQL text comes from sqlite_master */

/*
** An instance of the following object describes a single ON CONFLICT
** clause in an upsert.
**
** The pUpsertTarget field is only set if the ON CONFLICT clause includes
** conflict-target clause.  (In "ON CONFLICT(a,b)" the "(a,b)" is the

** routines as they walk the parse tree to make database references
** explicit.
*/
typedef struct DbFixer DbFixer;
struct DbFixer {
  Parse *pParse;      /* The parsing context.  Error messages written here */
  Schema *pSchema;    /* Fix items to this schema */
  int bVarOnly;       /* Check for variable references only */
  u8 bTemp;           /* True for TEMP schema entries */
  const char *zDb;    /* Make sure all objects are contained in this database */
  const char *zType;  /* Type of the container - used for error messages */
  const Token *pName; /* Name of the container - used for error messages */
};

/*
** An objected used to accumulate the text of a string where we

Expr *sqlite3Expr(sqlite3*,int,const char*);
void sqlite3ExprAttachSubtrees(sqlite3*,Expr*,Expr*,Expr*);
Expr *sqlite3PExpr(Parse*, int, Expr*, Expr*);
void sqlite3PExprAddSelect(Parse*, Expr*, Select*);
Expr *sqlite3ExprAnd(Parse*,Expr*, Expr*);
Expr *sqlite3ExprSimplifiedAndOr(Expr*);
Expr *sqlite3ExprFunction(Parse*,ExprList*, Token*, int);
void sqlite3ExprFunctionUsable(Parse*,Expr*,FuncDef*);
void sqlite3ExprAssignVarNumber(Parse*, Expr*, u32);
void sqlite3ExprDelete(sqlite3*, Expr*);
void sqlite3ExprUnmapAndDelete(Parse*, Expr*);
ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*);
ExprList *sqlite3ExprListAppendVector(Parse*,ExprList*,IdList*,Expr*);
void sqlite3ExprListSetSortOrder(ExprList*,int,int);
void sqlite3ExprListSetName(Parse*,ExprList*,Token*,int);

  ** Create a new SQL function called NAME.  Whenever that function is
  ** called, invoke SCRIPT to evaluate the function.
  **
  ** Options:
  **         --argcount N           Function has exactly N arguments
  **         --deterministic        The function is pure
  **         --directonly           Prohibit use inside triggers and views
  **         --innocuous            Has no side effects or information leaks
  **         --returntype TYPE      Specify the return type of the function
  */
  case DB_FUNCTION: {
    int flags = SQLITE_UTF8;
    SqlFunc *pFunc;
    Tcl_Obj *pScript;
    char *zName;

        i++;
      }else
      if( n>1 && strncmp(z, "-deterministic",n)==0 ){
        flags |= SQLITE_DETERMINISTIC;
      }else
      if( n>1 && strncmp(z, "-directonly",n)==0 ){
        flags |= SQLITE_DIRECTONLY;
      }else
      if( n>1 && strncmp(z, "-innocuous",n)==0 ){
        flags |= SQLITE_INNOCUOUS;
      }else
      if( n>1 && strncmp(z, "-returntype", n)==0 ){
        const char *azType[] = {"integer", "real", "text", "blob", "any", 0};
        assert( SQLITE_INTEGER==1 && SQLITE_FLOAT==2 && SQLITE_TEXT==3 );
        assert( SQLITE_BLOB==4 && SQLITE_NULL==5 );
        if( i==(objc-2) ){
          Tcl_AppendResult(interp, "option requires an argument: ", z,(char*)0);
          return TCL_ERROR;
        }
        i++;
        if( Tcl_GetIndexFromObj(interp, objv[i], azType, "type", 0, &eType) ){
          return TCL_ERROR;
        }
        eType++;
      }else{
        Tcl_AppendResult(interp, "bad option \"", z,
            "\": must be -argcount, -deterministic, -directonly,"
            " or -returntype", (char*)0
            " -innocuous, or -returntype", (char*)0
        );
        return TCL_ERROR;
      }
    }

    pScript = objv[objc-1];
    zName = Tcl_GetStringFromObj(objv[2], 0);

    }
    if( pItem->zAlias ){
      sqlite3_str_appendf(&x, " (AS %s)", pItem->zAlias);
    }
    if( pItem->fg.jointype & JT_LEFT ){
      sqlite3_str_appendf(&x, " LEFT-JOIN");
    }
    if( pItem->fg.fromDDL ){
      sqlite3_str_appendf(&x, " DDL");
    }
    sqlite3StrAccumFinish(&x);
    sqlite3TreeViewItem(pView, zLine, i<pSrc->nSrc-1); 
    if( pItem->pSelect ){
      sqlite3TreeViewSelect(pView, pItem->pSelect, 0);
    }
    if( pItem->fg.isTabFunc ){
      sqlite3TreeViewExprList(pView, pItem->u1.pFuncArg, 0, "func-args:");

  pView = sqlite3TreeViewPush(pView, moreToFollow);
  if( pExpr==0 ){
    sqlite3TreeViewLine(pView, "nil");
    sqlite3TreeViewPop(pView);
    return;
  }
  if( pExpr->flags || pExpr->affExpr ){
    if( ExprHasProperty(pExpr, EP_FromJoin) ){
      sqlite3_snprintf(sizeof(zFlgs),zFlgs,"  fg.af=%x.%c iRJT=%d",
                       pExpr->flags, pExpr->affExpr ? pExpr->affExpr : 'n',
                       pExpr->iRightJoinTable);
    StrAccum x;
    sqlite3StrAccumInit(&x, 0, zFlgs, sizeof(zFlgs), 0);
    sqlite3_str_appendf(&x, " fg.af=%x.%c",
      pExpr->flags, pExpr->affExpr ? pExpr->affExpr : 'n');
    if( ExprHasProperty(pExpr, EP_FromJoin) ){
      sqlite3_str_appendf(&x, " iRJT=%d", pExpr->iRightJoinTable);
    }else{
      sqlite3_snprintf(sizeof(zFlgs),zFlgs,"  fg.af=%x.%c",
    }
    if( ExprHasProperty(pExpr, EP_FromDDL) ){
      sqlite3_str_appendf(&x, " DDL");
                       pExpr->flags, pExpr->affExpr ? pExpr->affExpr : 'n');
    }
    sqlite3StrAccumFinish(&x);
  }else{
    zFlgs[0] = 0;
  }
  switch( pExpr->op ){
    case TK_AGG_COLUMN: {
      sqlite3TreeViewLine(pView, "AGG{%d:%d}%s",
            pExpr->iTable, pExpr->iColumn, zFlgs);

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

  if( !pVTable ){
    sqlite3OomFault(db);
    sqlite3DbFree(db, zModuleName);
    return SQLITE_NOMEM_BKPT;
  }
  pVTable->db = db;
  pVTable->pMod = pMod;
  pVTable->eVtabRisk = SQLITE_VTABRISK_Normal;

  iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
  pTab->azModuleArg[1] = db->aDb[iDb].zDbSName;

  /* Invoke the virtual table constructor */
  assert( &db->pVtabCtx );
  assert( xConstruct );

** Call from within the xCreate() or xConnect() methods to provide 
** the SQLite core with additional information about the behavior
** of the virtual table being implemented.
*/
int sqlite3_vtab_config(sqlite3 *db, int op, ...){
  va_list ap;
  int rc = SQLITE_OK;
  VtabCtx *p;

#ifdef SQLITE_ENABLE_API_ARMOR
  if( !sqlite3SafetyCheckOk(db) ) return SQLITE_MISUSE_BKPT;
#endif
  sqlite3_mutex_enter(db->mutex);
  va_start(ap, op);
  switch( op ){
    case SQLITE_VTAB_CONSTRAINT_SUPPORT: {
      VtabCtx *p = db->pVtabCtx;
      if( !p ){
        rc = SQLITE_MISUSE_BKPT;
      }else{
        assert( p->pTab==0 || IsVirtual(p->pTab) );
  p = db->pVtabCtx;
  if( !p ){
    rc = SQLITE_MISUSE_BKPT;
  }else{
    assert( p->pTab==0 || IsVirtual(p->pTab) );
    va_start(ap, op);
    switch( op ){
      case SQLITE_VTAB_CONSTRAINT_SUPPORT: {
        p->pVTable->bConstraint = (u8)va_arg(ap, int);
        break;
      }
      case SQLITE_VTAB_INNOCUOUS: {
        p->pVTable->eVtabRisk = SQLITE_VTABRISK_Low;
      break;
    }
    default:
      rc = SQLITE_MISUSE_BKPT;
      break;
  }
  va_end(ap);
        break;
      }
      case SQLITE_VTAB_DIRECTONLY: {
        p->pVTable->eVtabRisk = SQLITE_VTABRISK_High;
        break;
      }
      default: {
        rc = SQLITE_MISUSE_BKPT;
        break;
      }
    }
    va_end(ap);
  }

  if( rc!=SQLITE_OK ) sqlite3Error(db, rc);
  sqlite3_mutex_leave(db->mutex);
  return rc;
}

#endif /* SQLITE_OMIT_VIRTUALTABLE */

#
do_catchsql_test fts3atoken-1.10 {
  CREATE VIEW v110(x) AS
      SELECT fts3_tokenizer('tok110', fts3_tokenizer('simple')) IS NULL;
} {0 {}}
do_catchsql_test fts3atoken-1.11 {
  SELECT * FROM v110;
} {1 {fts3_tokenizer() prohibited in triggers and views}}
} {1 {unsafe use of fts3_tokenizer()}}
do_catchsql_test fts3atoken-1.12 {
  CREATE TABLE t110(a,b);
  CREATE TRIGGER r110 AFTER INSERT ON t110 BEGIN
      SELECT fts3_tokenizer('tok110', fts3_tokenizer('simple')) IS NULL;
  END;
} {0 {}}
do_catchsql_test fts3atoken-1.13 {
  INSERT INTO t110(a,b) VALUES(1,2);
} {1 {fts3_tokenizer() prohibited in triggers and views}}
} {1 {unsafe use of fts3_tokenizer()}}
do_catchsql_test fts3atoken-1.14 {
  SELECT * FROM t110;
} {0 {}}

#--------------------------------------------------------------------------
# Test cases fts3atoken-2.* test error cases in the scalar function based
# API for getting and setting tokenizers.

do_test func-33.1 {
  db func testdirectonly -directonly testdirectonly
  db eval {SELECT testdirectonly(15)}
} {30}
do_catchsql_test func-33.2 {
  CREATE VIEW v33(y) AS SELECT testdirectonly(15);
  SELECT * FROM v33;
} {1 {testdirectonly() prohibited in triggers and views}}
} {1 {unsafe use of testdirectonly()}}
do_execsql_test func-33.3 {
  SELECT * FROM (SELECT testdirectonly(15)) AS v33;
} {30}
do_execsql_test func-33.4 {
  WITH c(x) AS (SELECT testdirectonly(15))
  SELECT * FROM c;
} {30}
do_catchsql_test func-33.5 {
  WITH c(x) AS (SELECT * FROM v33)
  SELECT * FROM c;
} {1 {testdirectonly() prohibited in triggers and views}}
} {1 {unsafe use of testdirectonly()}}
do_execsql_test func-33.10 {
  CREATE TABLE t33a(a,b);
  CREATE TABLE t33b(x,y);
  CREATE TRIGGER r1 AFTER INSERT ON t33a BEGIN
    INSERT INTO t33b(x,y) VALUES(testdirectonly(new.a),new.b);
  END;
} {}
do_catchsql_test func-33.11 {
  INSERT INTO t33a VALUES(1,2);
} {1 {testdirectonly() prohibited in triggers and views}}
} {1 {unsafe use of testdirectonly()}}
do_execsql_test func-33.20 {
  ALTER TABLE t33a RENAME COLUMN a TO aaa;
  SELECT sql FROM sqlite_master WHERE name='r1';
} {{CREATE TRIGGER r1 AFTER INSERT ON t33a BEGIN
    INSERT INTO t33b(x,y) VALUES(testdirectonly(new.aaa),new.b);
  END}}

db function external external

do_execsql_test 1.0 {
  PRAGMA table_info(pragma_function_list)
} {
  0 name {} 0 {} 0 
  1 builtin {} 0 {} 0
  2 type {} 0 {} 0
  3 enc {} 0 {} 0
  4 narg {} 0 {} 0
  5 flags {} 0 {} 0
}
do_execsql_test 1.1 {
  SELECT DISTINCT name, builtin
  SELECT * FROM pragma_function_list WHERE name='upper' AND builtin
    FROM pragma_function_list WHERE name='upper' AND builtin
} {upper 1}
do_execsql_test 1.2 {
  SELECT DISTINCT name, builtin
  SELECT * FROM pragma_function_list WHERE name LIKE 'exter%';
    FROM pragma_function_list WHERE name LIKE 'exter%';
} {external 0}

ifcapable fts5 {
  do_execsql_test 2.0 {
    PRAGMA table_info(pragma_module_list)
  } {
    0 name {} 0 {} 0 

do_test 17.6.2 {
  list [catch { db function xyz -return ret } msg] $msg
} {1 {option requires an argument: -return}}

do_test 17.6.3 {
  list [catch { db function xyz -n object ret } msg] $msg
} {1 {bad option "-n": must be -argcount, -deterministic, -directonly, or -returntype}}
} {1 {bad option "-n": must be -argcount, -deterministic, -directonly, -innocuous, or -returntype}}

# 2019-02-28: The "bind_fallback" command.
#
do_test 18.100 {
  unset -nocomplain bindings abc def ghi jkl mno e01 e02
  set bindings(abc) [expr {1+2}]
  set bindings(def) {hello}

# 2020-01-08
#
# 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.
#
#***********************************************************************
# 
# Test cases for managing execution of code snippets found in untrusted
# schemas.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix trustschema1

# edgy functions used in generated columns
#
proc f1 {x} {return $x}
do_test 1.100 {
  db function f1 -innocuous -deterministic f1
  db function f2 -deterministic f1
  db function f3 -directonly -deterministic f1
  db eval {
    CREATE TABLE t1(a, b AS (f1(a+1)), c AS (f2(a+2)));
    INSERT INTO t1 VALUES(100),(200);
  }
} {}
do_catchsql_test 1.110 {
  SELECT a, b, c FROM t1;
} {0 {100 101 102 200 201 202}}
do_execsql_test 1.120 {
  PRAGMA trusted_schema=OFF;
} {}
do_catchsql_test 1.130 {
  SELECT a, b FROM t1;
} {0 {100 101 200 201}}
do_catchsql_test 1.140 {
  SELECT a, b, c FROM t1;
} {1 {unsafe use of f2()}}
do_catchsql_test 1.150 {
  PRAGMA trusted_schema=ON;
  DROP TABLE t1;
  CREATE TABLE t1(a, b AS (f3(a+1)));
} {1 {unsafe use of f3()}}
do_execsql_test 1.160 {
  PRAGMA trusted_schema=OFF;
  CREATE TEMP TABLE temp1(a,b AS (f3(a+1)));
  INSERT INTO temp1(a) VALUES(100),(900);
  SELECT * FROM temp1;
} {100 101 900 901}

# edgy functions used in CHECK constraints
#
do_catchsql_test 1.200 {
  PRAGMA trusted_schema=ON;
  CREATE TABLE t2(a,b,c,CHECK(f3(c)==c));
} {1 {unsafe use of f3()}}
do_catchsql_test 1.210 {
  PRAGMA trusted_schema=Off;
  CREATE TABLE t2(a,b,c,CHECK(f2(c)==c));
} {1 {unsafe use of f2()}}
do_catchsql_test 1.211 {
  PRAGMA trusted_schema=On;
  CREATE TABLE t2(a,b,c,CHECK(f2(c)==c));
} {0 {}}
do_catchsql_test 1.220 {
  INSERT INTO t2 VALUES(1,2,3);
  SELECT * FROM t2;
} {0 {1 2 3}}
do_catchsql_test 1.230 {
  PRAGMA trusted_schema=off;
  INSERT INTO t2 VALUES(4,5,6);
} {1 {unsafe use of f2()}}
do_execsql_test 1.231 {
  SELECT * FROM t2;
} {1 2 3}
# Ok to put as many edgy functions as you want in a
# TEMP table.
do_execsql_test 1.240 {
  PRAGMA trusted_schema=OFF;
  CREATE TEMP TABLE temp2(a, b, CHECK(f3(b)==b));
  INSERT INTO temp2(a,b) VALUES(1,2),('x','y');
  SELECT * FROM temp2;
} {1 2 x y}

# edgy functions used in DEFAULT constraints
#
do_catchsql_test 1.300 {
  CREATE TABLE t3(a,b DEFAULT(f2(25)));
} {0 {}}
do_catchsql_test 1.310 {
  PRAGMA trusted_schema=Off;
  INSERT INTO t3(a) VALUES(1);
} {1 {unsafe use of f2()}}
do_catchsql_test 1.311 {
  INSERT INTO t3(a,b) VALUES(1,2);
} {0 {}}
do_execsql_test 1.320 {
  CREATE TEMP TABLE temp3(a, b DEFAULT(f3(31)));
  INSERT INTO temp3(a) VALUES(22);
  SELECT * FROM temp3;
} {22 31}

# edgy functions used in partial indexes.
#
do_execsql_test 1.400 {
  CREATE TABLE t4(a,b,c);
  INSERT INTO t4 VALUES(1,2,3),('a','b','c'),(4,'d',0);
  SELECT * FROM t4;
  CREATE TEMP TABLE temp4(a,b,c);
  INSERT INTO temp4 SELECT * FROM t4;
} {1 2 3 a b c 4 d 0}
do_catchsql_test 1.410 {
  CREATE INDEX t4a ON t4(a) WHERE f3(c);
} {1 {unsafe use of f3()}}
do_catchsql_test 1.420 {
  PRAGMA trusted_schema=OFF;
  CREATE INDEX t4a ON t4(a) WHERE f2(c);
} {1 {unsafe use of f2()}}
do_execsql_test 1.421 {
  CREATE INDEX t4a ON t4(a) WHERE f1(c);
  SELECT a FROM t4 WHERE f1(c) ORDER BY a;
} {1}
do_execsql_test 1.430 {
  PRAGMA trusted_schema=ON;
  CREATE INDEX t4b ON t4(b) WHERE f2(c);
  SELECT b FROM t4 WHERE f2(c) ORDER BY b;
} {2}
do_execsql_test 1.440 {
  PRAGMA trusted_schema=OFF;
  CREATE INDEX temp4a ON temp4(a) WHERE f3(c);
  SELECT a FROM temp4 WHERE f2(c) ORDER BY a;
} {1}

# edgy functions used in index expressions
#
do_execsql_test 1.500 {
  CREATE TABLE t5(a,b,c);
  INSERT INTO t5 VALUES(1,2,3),(4,5,6),(7,0,-3);
  SELECT * FROM t5;
  CREATE TEMP TABLE temp5(a,b,c);
  INSERT INTO temp5 SELECT * FROM t5;
} {1 2 3 4 5 6 7 0 -3}
do_catchsql_test 1.510 {
  CREATE INDEX t5x1 ON t5(a+f3(b));
} {1 {unsafe use of f3()}}
do_catchsql_test 1.520 {
  PRAGMA trusted_schema=OFF;
  CREATE INDEX t5x1 ON t5(a+f2(b));
} {1 {unsafe use of f2()}}
do_execsql_test 1.521 {
  CREATE INDEX t5x1 ON t5(a+f1(b));
  SELECT * FROM t5 INDEXED BY t5x1 WHERE a+f1(b)=3;
} {1 2 3}
do_execsql_test 1.530 {
  PRAGMA trusted_schema=ON;
  CREATE INDEX t5x2 ON t5(b+f2(c));
  SELECT * FROM t5 INDEXED BY t5x2 WHERE b+f2(c)=11;
} {4 5 6}
do_execsql_test 1.540 {
  PRAGMA trusted_schema=OFF;
  CREATE INDEX temp5x1 ON temp5(a+f3(b));
  SELECT * FROM temp5 INDEXED BY temp5x1 WHERE a+f3(b)=7;
} {7 0 -3}

# edgy functions in VIEWs
#
reset_db
db function f1 -innocuous -deterministic f1
db function f2 -deterministic f1
db function f3 -directonly -deterministic f1
do_execsql_test 2.100 {
  CREATE TABLE t1(a,b,c);
  INSERT INTO t1 VALUES(1,2,3),(100,50,75),(-11,22,-33);
  CREATE VIEW v1a AS SELECT f3(a+b) FROM t1;
  SELECT f3(a+b) FROM t1;
} {3 150 11}
do_catchsql_test 2.110 {
  PRAGMA trusted_schema=ON;
  SELECT * FROM v1a;
} {1 {unsafe use of f3()}}
do_catchsql_test 2.111 {
  PRAGMA trusted_schema=OFF;
  SELECT * FROM v1a;
} {1 {unsafe use of f3()}}
do_execsql_test 2.120 {
  DROP VIEW v1a;
  CREATE TEMP VIEW v1a AS SELECT f3(a+b) FROM t1;
  SELECT * FROM v1a;
} {3 150 11}
do_execsql_test 2.130 {
  CREATE VIEW v1b AS SELECT f2(b+c) FROM t1;
  SELECT f2(b+c) FROM t1;
} {5 125 -11}
do_catchsql_test 2.140 {
  PRAGMA trusted_schema=ON;
  SELECT * FROM v1b;
} {0 {5 125 -11}}
do_catchsql_test 2.141 {
  PRAGMA trusted_schema=OFF;
  SELECT * FROM v1b;
} {1 {unsafe use of f2()}}
do_execsql_test 2.150 {
  DROP VIEW v1b;
  CREATE TEMP VIEW v1b AS SELECT f2(b+c) FROM t1;
  SELECT * FROM v1b;
} {5 125 -11}

# edgy functions inside of triggers
#
do_execsql_test 3.100 {
  DELETE FROM t1;
  CREATE TABLE t2(x);
  CREATE TRIGGER r1 AFTER INSERT ON t1 BEGIN
    INSERT INTO t2(x) SELECT f3(new.a);
  END;
} {}
do_catchsql_test 3.110 {
  INSERT INTO t1 VALUES(7,6,5);
} {1 {unsafe use of f3()}}
do_execsql_test 3.111 {
  SELECT * FROM t1;
  SELECT * FROM t2;
} {}

do_execsql_test 3.120 {
  DROP TRIGGER r1;
  CREATE TRIGGER r1 AFTER INSERT ON t1 BEGIN
    INSERT INTO t2(x) SELECT f2(new.a)+100;
  END;
  PRAGMA trusted_schema=ON;
  INSERT INTO t1 VALUES(7,6,5);
  SELECT * FROM t1, t2;
} {7 6 5 107}
do_catchsql_test 3.130 {
  DELETE FROM t1;
  DELETE FROM t2;
  PRAGMA trusted_schema=OFF;
  INSERT INTO t1 VALUES(7,6,5);
} {1 {unsafe use of f2()}}
do_execsql_test 3.131 {
  SELECT * FROM t1;
  SELECT * FROM t2;
} {}


finish_test

  IF:   !defined(SQLITE_OMIT_FLAG_PRAGMAS)

  NAME: recursive_triggers
  TYPE: FLAG
  ARG:  SQLITE_RecTriggers
  IF:   !defined(SQLITE_OMIT_FLAG_PRAGMAS)

  NAME: trusted_schema
  TYPE: FLAG
  ARG:  SQLITE_TrustedSchema
  IF:   !defined(SQLITE_OMIT_FLAG_PRAGMAS)

  NAME: foreign_keys
  TYPE: FLAG
  ARG:  SQLITE_ForeignKeys
  IF:   !defined(SQLITE_OMIT_FLAG_PRAGMAS)
  IF:   !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)

  NAME: defer_foreign_keys

  NAME: database_list
  FLAG: NeedSchema Result0
  COLS: seq name file
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: function_list
  FLAG: Result0
  COLS: name builtin
  COLS: name builtin type enc narg flags
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
  IF:   !defined(SQLITE_OMIT_INTROSPECTION_PRAGMAS)

  NAME: module_list
  FLAG: Result0
  COLS: name
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)