SQLite

3.21.0

#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.69 for sqlite 3.21.0.
#
#
# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
#
#
# This configure script is free software; the Free Software Foundation
# gives unlimited permission to copy, distribute and modify it.

subdirs=
MFLAGS=
MAKEFLAGS=

# Identity of this package.
PACKAGE_NAME='sqlite'
PACKAGE_TARNAME='sqlite'
PACKAGE_VERSION='3.21.0'
PACKAGE_STRING='sqlite 3.21.0'
PACKAGE_BUGREPORT=''
PACKAGE_URL=''

# Factoring default headers for most tests.
ac_includes_default="\
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H

#
# Report the --help message.
#
if test "$ac_init_help" = "long"; then
  # Omit some internal or obsolete options to make the list less imposing.
  # This message is too long to be a string in the A/UX 3.1 sh.
  cat <<_ACEOF
\`configure' configures sqlite 3.21.0 to adapt to many kinds of systems.

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

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

Defaults for the options are specified in brackets.

  --build=BUILD     configure for building on BUILD [guessed]
  --host=HOST       cross-compile to build programs to run on HOST [BUILD]
_ACEOF
fi

if test -n "$ac_init_help"; then
  case $ac_init_help in
     short | recursive ) echo "Configuration of sqlite 3.21.0:";;
   esac
  cat <<\_ACEOF

Optional Features:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]

    cd "$ac_pwd" || { ac_status=$?; break; }
  done
fi

test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
  cat <<\_ACEOF
sqlite configure 3.21.0
generated by GNU Autoconf 2.69

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

  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

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

It was created by sqlite $as_me 3.21.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  $ $0 $@

_ACEOF
exec 5>>config.log
{

test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1

cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
# Save the log message, to keep $0 and so on meaningful, and to
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
This file was extended by sqlite $as_me 3.21.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

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

Report bugs to the package provider."

_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
sqlite config.status 3.21.0
configured by $0, generated by GNU Autoconf 2.69,
  with options \\"\$ac_cs_config\\"

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

  /* The column value supplied by SQLite must be in range. */
  assert( iCol>=0 && iCol<=p->nColumn+2 );

  switch( iCol-p->nColumn ){
    case 0:
      /* The special 'table-name' column */
      sqlite3_result_pointer(pCtx, pCsr, "fts3cursor", 0);
      break;

    case 1:
      /* The docid column */
      sqlite3_result_int64(pCtx, pCsr->iPrevId);
      break;

    fts5_api *pApi = 0;

    rc = sqlite3_prepare_v2(db, "SELECT fts5(?1)", -1, &pStmt, 0);
    if( rc!=SQLITE_OK ){
      Tcl_AppendResult(interp, "error: ", sqlite3_errmsg(db), 0);
      return TCL_ERROR;
    }
    sqlite3_bind_pointer(pStmt, 1, (void*)&pApi, "fts5_api_ptr", 0);
    sqlite3_step(pStmt);

    if( sqlite3_finalize(pStmt)!=SQLITE_OK ){
      Tcl_AppendResult(interp, "error: ", sqlite3_errmsg(db), 0);
      return TCL_ERROR;
    }

static int fts5_api_from_db(sqlite3 *db, fts5_api **ppApi){
  sqlite3_stmt *pStmt = 0;
  int rc;

  *ppApi = 0;
  rc = sqlite3_prepare(db, "SELECT fts5(?1)", -1, &pStmt, 0);
  if( rc==SQLITE_OK ){
    sqlite3_bind_pointer(pStmt, 1, (void*)ppApi, "fts5_api_ptr", 0);
    (void)sqlite3_step(pStmt);
    rc = sqlite3_finalize(pStmt);
  }

  return rc;
}

** at the address $ptr.  $ptr is a pointer to the array of integers.
** The pointer value must be assigned to $ptr using the
** sqlite3_bind_pointer() interface with a pointer type of "carray".
** For example:
**
**    static int aX[] = { 53, 9, 17, 2231, 4, 99 };
**    int i = sqlite3_bind_parameter_index(pStmt, "$ptr");
**    sqlite3_bind_value(pStmt, i, aX, "carray", 0);
**
** There is an optional third parameter to determine the datatype of
** the C-language array.  Allowed values of the third parameter are
** 'int32', 'int64', 'double', 'char*'.  Example:
**
**      SELECT * FROM carray($ptr,10,'char*');
**

  i64 = sqlite3_value_int64(argv[0]);
  if( sizeof(i64)==sizeof(p) ){
    memcpy(&p, &i64, sizeof(p));
  }else{
    int i32 = i64 & 0xffffffff;
    memcpy(&p, &i32, sizeof(p));
  }
  sqlite3_result_pointer(context, p, "carray", 0);
}
#endif /* SQLITE_TEST */

#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifdef _WIN32
__declspec(dllexport)

struct RtreeGeomCallback {
  int (*xGeom)(sqlite3_rtree_geometry*, int, RtreeDValue*, int*);
  int (*xQueryFunc)(sqlite3_rtree_query_info*);
  void (*xDestructor)(void*);
  void *pContext;
};









/*
** An instance of this structure (in the form of a BLOB) is returned by
** the SQL functions that sqlite3_rtree_geometry_callback() and
** sqlite3_rtree_query_callback() create, and is read as the right-hand
** operand to the MATCH operator of an R-Tree.
*/
struct RtreeMatchArg {
  u32 iSize;                  /* Size of this object */
  RtreeGeomCallback cb;       /* Info about the callback functions */
  int nParam;                 /* Number of parameters to the SQL function */
  sqlite3_value **apSqlParam; /* Original SQL parameter values */
  RtreeDValue aParam[1];      /* Values for parameters to the SQL function */
};

#ifndef MAX

/*
** This function is called to configure the RtreeConstraint object passed
** as the second argument for a MATCH constraint. The value passed as the
** first argument to this function is the right-hand operand to the MATCH
** operator.
*/
static int deserializeGeometry(sqlite3_value *pValue, RtreeConstraint *pCons){
  RtreeMatchArg *pBlob, *pSrc;       /* BLOB returned by geometry function */
  sqlite3_rtree_query_info *pInfo;   /* Callback information */







  pSrc = sqlite3_value_pointer(pValue, "RtreeMatchArg");

  if( pSrc==0 ) return SQLITE_ERROR;


  pInfo = (sqlite3_rtree_query_info*)
                sqlite3_malloc64( sizeof(*pInfo)+pSrc->iSize );
  if( !pInfo ) return SQLITE_NOMEM;
  memset(pInfo, 0, sizeof(*pInfo));
  pBlob = (RtreeMatchArg*)&pInfo[1];

  memcpy(pBlob, pSrc, pSrc->iSize);







  pInfo->pContext = pBlob->cb.pContext;
  pInfo->nParam = pBlob->nParam;
  pInfo->aParam = pBlob->aParam;
  pInfo->apSqlParam = pBlob->apSqlParam;

  if( pBlob->cb.xGeom ){
    pCons->u.xGeom = pBlob->cb.xGeom;

  nBlob = sizeof(RtreeMatchArg) + (nArg-1)*sizeof(RtreeDValue)
           + nArg*sizeof(sqlite3_value*);
  pBlob = (RtreeMatchArg *)sqlite3_malloc(nBlob);
  if( !pBlob ){
    sqlite3_result_error_nomem(ctx);
  }else{
    int i;
    pBlob->iSize = nBlob;
    pBlob->cb = pGeomCtx[0];
    pBlob->apSqlParam = (sqlite3_value**)&pBlob->aParam[nArg];
    pBlob->nParam = nArg;
    for(i=0; i<nArg; i++){
      pBlob->apSqlParam[i] = sqlite3_value_dup(aArg[i]);
      if( pBlob->apSqlParam[i]==0 ) memErr = 1;
#ifdef SQLITE_RTREE_INT_ONLY
      pBlob->aParam[i] = sqlite3_value_int64(aArg[i]);
#else
      pBlob->aParam[i] = sqlite3_value_double(aArg[i]);
#endif
    }
    if( memErr ){
      sqlite3_result_error_nomem(ctx);
      rtreeMatchArgFree(pBlob);
    }else{
      sqlite3_result_pointer(ctx, pBlob, "RtreeMatchArg", rtreeMatchArgFree);
    }
  }
}

/*
** Register a new geometry function for use with the r-tree MATCH operator.
*/

  int nTabName;             /* Number of UTF-8 characters in zTabName */
  const char *zTabName;     /* Original name of the table */
  Vdbe *v;
#ifndef SQLITE_OMIT_TRIGGER
  char *zWhere = 0;         /* Where clause to locate temp triggers */
#endif
  VTable *pVTab = 0;        /* Non-zero if this is a v-tab with an xRename() */
  u32 savedDbFlags;         /* Saved value of db->mDbFlags */

  savedDbFlags = db->mDbFlags;  
  if( NEVER(db->mallocFailed) ) goto exit_rename_table;
  assert( pSrc->nSrc==1 );
  assert( sqlite3BtreeHoldsAllMutexes(pParse->db) );

  pTab = sqlite3LocateTableItem(pParse, 0, &pSrc->a[0]);
  if( !pTab ) goto exit_rename_table;
  iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
  zDb = db->aDb[iDb].zDbSName;
  db->mDbFlags |= DBFLAG_PreferBuiltin;

  /* Get a NULL terminated version of the new table name. */
  zName = sqlite3NameFromToken(db, pName);
  if( !zName ) goto exit_rename_table;

  /* Check that a table or index named 'zName' does not already exist
  ** in database iDb. If so, this is an error.

  /* Drop and reload the internal table schema. */
  reloadTableSchema(pParse, pTab, zName);

exit_rename_table:
  sqlite3SrcListDelete(db, pSrc);
  sqlite3DbFree(db, zName);
  db->mDbFlags = savedDbFlags;
}

/*
** This function is called after an "ALTER TABLE ... ADD" statement
** has been parsed. Argument pColDef contains the text of the new
** column definition.
**

    sqlite3ValueFree(pVal);
  }

  /* Modify the CREATE TABLE statement. */
  zCol = sqlite3DbStrNDup(db, (char*)pColDef->z, pColDef->n);
  if( zCol ){
    char *zEnd = &zCol[pColDef->n-1];
    u32 savedDbFlags = db->mDbFlags;
    while( zEnd>zCol && (*zEnd==';' || sqlite3Isspace(*zEnd)) ){
      *zEnd-- = '\0';
    }
    db->mDbFlags |= DBFLAG_PreferBuiltin;
    sqlite3NestedParse(pParse, 
        "UPDATE \"%w\".%s SET "
          "sql = substr(sql,1,%d) || ', ' || %Q || substr(sql,%d) "
        "WHERE type = 'table' AND name = %Q", 
      zDb, MASTER_NAME, pNew->addColOffset, zCol, pNew->addColOffset+1,
      zTab
    );
    sqlite3DbFree(db, zCol);
    db->mDbFlags = savedDbFlags;
  }

  /* Make sure the schema version is at least 3.  But do not upgrade
  ** from less than 3 to 4, as that will corrupt any preexisting DESC
  ** index.
  */
  r1 = sqlite3GetTempReg(pParse);

      while( ALWAYS(p) && p->pNext!=pIndex ){ p = p->pNext; }
      if( ALWAYS(p && p->pNext==pIndex) ){
        p->pNext = pIndex->pNext;
      }
    }
    freeIndex(db, pIndex);
  }
  db->mDbFlags |= DBFLAG_SchemaChange;
}

/*
** Look through the list of open database files in db->aDb[] and if
** any have been closed, remove them from the list.  Reallocate the
** db->aDb[] structure to a smaller size, if possible.
**

  sqlite3BtreeEnterAll(db);
  for(i=0; i<db->nDb; i++){
    Db *pDb = &db->aDb[i];
    if( pDb->pSchema ){
      sqlite3SchemaClear(pDb->pSchema);
    }
  }
  db->mDbFlags &= ~DBFLAG_SchemaChange;
  sqlite3VtabUnlockList(db);
  sqlite3BtreeLeaveAll(db);
  sqlite3CollapseDatabaseArray(db);
}

/*
** This routine is called when a commit occurs.
*/
void sqlite3CommitInternalChanges(sqlite3 *db){
  db->mDbFlags &= ~DBFLAG_SchemaChange;
}

/*
** Delete memory allocated for the column names of a table or view (the
** Table.aCol[] array).
*/
void sqlite3DeleteColumnNames(sqlite3 *db, Table *pTable){

  assert( iDb>=0 && iDb<db->nDb );
  assert( zTabName );
  assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
  testcase( zTabName[0]==0 );  /* Zero-length table names are allowed */
  pDb = &db->aDb[iDb];
  p = sqlite3HashInsert(&pDb->pSchema->tblHash, zTabName, 0);
  sqlite3DeleteTable(db, p);
  db->mDbFlags |= DBFLAG_SchemaChange;
}

/*
** Given a token, return a string that consists of the text of that
** token.  Space to hold the returned string
** is obtained from sqliteMalloc() and must be freed by the calling
** function.

    *pUnqual = pName2;
    iDb = sqlite3FindDb(db, pName1);
    if( iDb<0 ){
      sqlite3ErrorMsg(pParse, "unknown database %T", pName1);
      return -1;
    }
  }else{
    assert( db->init.iDb==0 || db->init.busy
             || (db->mDbFlags & DBFLAG_Vacuum)!=0);
    iDb = db->init.iDb;
    *pUnqual = pName1;
  }
  return iDb;
}

/*

    pOld = sqlite3HashInsert(&pSchema->tblHash, p->zName, p);
    if( pOld ){
      assert( p==pOld );  /* Malloc must have failed inside HashInsert() */
      sqlite3OomFault(db);
      return;
    }
    pParse->pNewTable = 0;
    db->mDbFlags |= DBFLAG_SchemaChange;

#ifndef SQLITE_OMIT_ALTERTABLE
    if( !p->pSelect ){
      const char *zName = (const char *)pParse->sNameToken.z;
      int nName;
      assert( !pSelect && pCons && pEnd );
      if( pCons->z==0 ){

    p = sqlite3HashInsert(&pIndex->pSchema->idxHash, 
                          pIndex->zName, pIndex);
    if( p ){
      assert( p==pIndex );  /* Malloc must have failed */
      sqlite3OomFault(db);
      goto exit_create_index;
    }
    db->mDbFlags |= DBFLAG_SchemaChange;
    if( pTblName!=0 ){
      pIndex->tnum = db->init.newTnum;
    }
  }

  /* If this is the initial CREATE INDEX statement (or CREATE TABLE if the
  ** index is an implied index for a UNIQUE or PRIMARY KEY constraint) then

      bestScore = score;
    }
    p = p->pNext;
  }

  /* If no match is found, search the built-in functions.
  **
  ** If the DBFLAG_PreferBuiltin flag is set, then search the built-in
  ** functions even if a prior app-defined function was found.  And give
  ** priority to built-in functions.
  **
  ** Except, if createFlag is true, that means that we are trying to
  ** install a new function.  Whatever FuncDef structure is returned it will
  ** have fields overwritten with new information appropriate for the
  ** new function.  But the FuncDefs for built-in functions are read-only.
  ** So we must not search for built-ins when creating a new function.
  */ 
  if( !createFlag && (pBest==0 || (db->mDbFlags & DBFLAG_PreferBuiltin)!=0) ){
    bestScore = 0;
    h = (sqlite3UpperToLower[(u8)zName[0]] + nName) % SQLITE_FUNC_HASH_SZ;
    p = functionSearch(h, zName);
    while( p ){
      int score = matchQuality(p, nArg, enc);
      if( score>bestScore ){
        pBest = p;

  setLikeOptFlag(db, "like", 
      caseSensitive ? (SQLITE_FUNC_LIKE | SQLITE_FUNC_CASE) : SQLITE_FUNC_LIKE);
}

/*
** pExpr points to an expression which implements a function.  If
** it is appropriate to apply the LIKE optimization to that function
** then set aWc[0] through aWc[2] to the wildcard characters and the
** escape character and then return TRUE.  If the function is not a 
** LIKE-style function then return FALSE.
**
** The expression "a LIKE b ESCAPE c" is only considered a valid LIKE
** operator if c is a string literal that is exactly one byte in length.
** That one byte is stored in aWc[3].  aWc[3] is set to zero if there is
** no ESCAPE clause.
**
** *pIsNocase is set to true if uppercase and lowercase are equivalent for
** the function (default for LIKE).  If the function makes the distinction
** between uppercase and lowercase (as does GLOB) then *pIsNocase is set to
** false.
*/
int sqlite3IsLikeFunction(sqlite3 *db, Expr *pExpr, int *pIsNocase, char *aWc){
  FuncDef *pDef;
  int nExpr;
  if( pExpr->op!=TK_FUNCTION || !pExpr->x.pList ){



    return 0;
  }
  assert( !ExprHasProperty(pExpr, EP_xIsSelect) );
  nExpr = pExpr->x.pList->nExpr;
  pDef = sqlite3FindFunction(db, pExpr->u.zToken, nExpr, SQLITE_UTF8, 0);
  if( NEVER(pDef==0) || (pDef->funcFlags & SQLITE_FUNC_LIKE)==0 ){
    return 0;
  }
  if( nExpr<3 ){
    aWc[3] = 0;
  }else{
    Expr *pEscape = pExpr->x.pList->a[2].pExpr;
    char *zEscape;
    if( pEscape->op!=TK_STRING ) return 0;
    zEscape = pEscape->u.zToken;
    if( zEscape[0]==0 || zEscape[1]!=0 ) return 0;
    aWc[3] = zEscape[0];
  }

  /* The memcpy() statement assumes that the wildcard characters are
  ** the first three statements in the compareInfo structure.  The
  ** asserts() that follow verify that assumption
  */
  memcpy(aWc, pDef->pUserData, 3);
  assert( (char*)&likeInfoAlt == (char*)&likeInfoAlt.matchAll );

static int autoIncBegin(
  Parse *pParse,      /* Parsing context */
  int iDb,            /* Index of the database holding pTab */
  Table *pTab         /* The table we are writing to */
){
  int memId = 0;      /* Register holding maximum rowid */
  if( (pTab->tabFlags & TF_Autoincrement)!=0
   && (pParse->db->mDbFlags & DBFLAG_Vacuum)==0
  ){
    Parse *pToplevel = sqlite3ParseToplevel(pParse);
    AutoincInfo *pInfo;

    pInfo = pToplevel->pAinc;
    while( pInfo && pInfo->pTab!=pTab ){ pInfo = pInfo->pNext; }
    if( pInfo==0 ){

  if( pDest->iPKey!=pSrc->iPKey ){
    return 0;   /* Both tables must have the same INTEGER PRIMARY KEY */
  }
  for(i=0; i<pDest->nCol; i++){
    Column *pDestCol = &pDest->aCol[i];
    Column *pSrcCol = &pSrc->aCol[i];
#ifdef SQLITE_ENABLE_HIDDEN_COLUMNS
    if( (db->mDbFlags & DBFLAG_Vacuum)==0 
     && (pDestCol->colFlags | pSrcCol->colFlags) & COLFLAG_HIDDEN 
    ){
      return 0;    /* Neither table may have __hidden__ columns */
    }
#endif
    if( pDestCol->affinity!=pSrcCol->affinity ){
      return 0;    /* Affinity must be the same on all columns */

  iSrc = pParse->nTab++;
  iDest = pParse->nTab++;
  regAutoinc = autoIncBegin(pParse, iDbDest, pDest);
  regData = sqlite3GetTempReg(pParse);
  regRowid = sqlite3GetTempReg(pParse);
  sqlite3OpenTable(pParse, iDest, iDbDest, pDest, OP_OpenWrite);
  assert( HasRowid(pDest) || destHasUniqueIdx );
  if( (db->mDbFlags & DBFLAG_Vacuum)==0 && (
      (pDest->iPKey<0 && pDest->pIndex!=0)          /* (1) */
   || destHasUniqueIdx                              /* (2) */
   || (onError!=OE_Abort && onError!=OE_Rollback)   /* (3) */
  )){
    /* In some circumstances, we are able to run the xfer optimization
    ** only if the destination table is initially empty. Unless the
    ** DBFLAG_Vacuum flag is set, this block generates code to make
    ** that determination. If DBFLAG_Vacuum is set, then the destination
    ** table is always empty.
    **
    ** Conditions under which the destination must be empty:
    **
    ** (1) There is no INTEGER PRIMARY KEY but there are indices.
    **     (If the destination is not initially empty, the rowid fields
    **     of index entries might need to change.)

    }else if( pDest->pIndex==0 ){
      addr1 = sqlite3VdbeAddOp2(v, OP_NewRowid, iDest, regRowid);
    }else{
      addr1 = sqlite3VdbeAddOp2(v, OP_Rowid, iSrc, regRowid);
      assert( (pDest->tabFlags & TF_Autoincrement)==0 );
    }
    sqlite3VdbeAddOp3(v, OP_RowData, iSrc, regData, 1);
    if( db->mDbFlags & DBFLAG_Vacuum ){
      sqlite3VdbeAddOp3(v, OP_Last, iDest, 0, -1);
      insFlags = OPFLAG_NCHANGE|OPFLAG_LASTROWID|
                           OPFLAG_APPEND|OPFLAG_USESEEKRESULT;
    }else{
      insFlags = OPFLAG_NCHANGE|OPFLAG_LASTROWID|OPFLAG_APPEND;
    }
    sqlite3VdbeAddOp4(v, OP_Insert, iDest, regData, regRowid,

    VdbeComment((v, "%s", pSrcIdx->zName));
    sqlite3VdbeAddOp3(v, OP_OpenWrite, iDest, pDestIdx->tnum, iDbDest);
    sqlite3VdbeSetP4KeyInfo(pParse, pDestIdx);
    sqlite3VdbeChangeP5(v, OPFLAG_BULKCSR);
    VdbeComment((v, "%s", pDestIdx->zName));
    addr1 = sqlite3VdbeAddOp2(v, OP_Rewind, iSrc, 0); VdbeCoverage(v);
    sqlite3VdbeAddOp3(v, OP_RowData, iSrc, regData, 1);
    if( db->mDbFlags & DBFLAG_Vacuum ){
      /* This INSERT command is part of a VACUUM operation, which guarantees
      ** that the destination table is empty. If all indexed columns use
      ** collation sequence BINARY, then it can also be assumed that the
      ** index will be populated by inserting keys in strictly sorted 
      ** order. In this case, instead of seeking within the b-tree as part
      ** of every OP_IdxInsert opcode, an OP_Last is added before the
      ** OP_IdxInsert to seek to the point within the b-tree where each key 

      };
      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*);
          u32 oldFlags = db->flags;
          if( onoff>0 ){
            db->flags |= aFlagOp[i].mask;
          }else if( onoff==0 ){
            db->flags &= ~aFlagOp[i].mask;
          }
          if( oldFlags!=db->flags ){
            sqlite3ExpirePreparedStatements(db);

  /* Obtain all b-tree mutexes before making any calls to BtreeRollback(). 
  ** This is important in case the transaction being rolled back has
  ** modified the database schema. If the b-tree mutexes are not taken
  ** here, then another shared-cache connection might sneak in between
  ** the database rollback and schema reset, which can cause false
  ** corruption reports in some cases.  */
  sqlite3BtreeEnterAll(db);
  schemaChange = (db->mDbFlags & DBFLAG_SchemaChange)!=0 && db->init.busy==0;

  for(i=0; i<db->nDb; i++){
    Btree *p = db->aDb[i].pBt;
    if( p ){
      if( sqlite3BtreeIsInTrans(p) ){
        inTrans = 1;
      }
      sqlite3BtreeRollback(p, tripCode, !schemaChange);
    }
  }
  sqlite3VtabRollback(db);
  sqlite3EndBenignMalloc();

  if( (db->mDbFlags&DBFLAG_SchemaChange)!=0 && db->init.busy==0 ){
    sqlite3ExpirePreparedStatements(db);
    sqlite3ResetAllSchemasOfConnection(db);
  }
  sqlite3BtreeLeaveAll(db);

  /* Any deferred constraint violations have now been resolved. */
  db->nDeferredCons = 0;

    db->init.iDb = iDb;
    db->init.newTnum = sqlite3Atoi(argv[1]);
    db->init.orphanTrigger = 0;
    TESTONLY(rcp = ) sqlite3_prepare(db, argv[2], -1, &pStmt, 0);
    rc = db->errCode;
    assert( (rc&0xFF)==(rcp&0xFF) );
    db->init.iDb = saved_iDb;
    assert( saved_iDb==0 || (db->mDbFlags & DBFLAG_Vacuum)!=0 );
    if( SQLITE_OK!=rc ){
      if( db->init.orphanTrigger ){
        assert( iDb==1 );
      }else{
        pData->rc = rc;
        if( rc==SQLITE_NOMEM ){
          sqlite3OomFault(db);

**
** After a database is initialized, the DB_SchemaLoaded bit is set
** bit is set in the flags field of the Db structure. If the database
** file was of zero-length, then the DB_Empty flag is also set.
*/
int sqlite3Init(sqlite3 *db, char **pzErrMsg){
  int i, rc;
  int commit_internal = !(db->mDbFlags&DBFLAG_SchemaChange);
  
  assert( sqlite3_mutex_held(db->mutex) );
  assert( sqlite3BtreeHoldsMutex(db->aDb[0].pBt) );
  assert( db->init.busy==0 );
  rc = SQLITE_OK;
  db->init.busy = 1;
  ENC(db) = SCHEMA_ENC(db);

** is filled with zeroes.  ^A zeroblob uses a fixed amount of memory
** (just an integer to hold its size) while it is being processed.
** Zeroblobs are intended to serve as placeholders for BLOBs whose
** content is later written using
** [sqlite3_blob_open | incremental BLOB I/O] routines.
** ^A negative value for the zeroblob results in a zero-length BLOB.
**
** ^The sqlite3_bind_pointer(S,I,P,T,D) routine causes the I-th parameter in
** [prepared statement] S to have an SQL value of NULL, but to also be
** associated with the pointer P of type T.  ^D is either a NULL pointer or
** a pointer to a destructor function for P. ^SQLite will invoke the
** destructor D with a single argument of P when it is finished using


** P.  The T parameter should be a static string, preferably a string



** literal. The sqlite3_bind_pointer() routine is part of the
** [pointer passing interface] added for SQLite 3.20.0.
**
** ^If any of the sqlite3_bind_*() routines are called with a NULL pointer
** for the [prepared statement] or with a prepared statement for which
** [sqlite3_step()] has been called more recently than [sqlite3_reset()],
** then the call will return [SQLITE_MISUSE].  If any sqlite3_bind_()
** routine is passed a [prepared statement] that has been finalized, the
** result is undefined and probably harmful.

int sqlite3_bind_int64(sqlite3_stmt*, int, sqlite3_int64);
int sqlite3_bind_null(sqlite3_stmt*, int);
int sqlite3_bind_text(sqlite3_stmt*,int,const char*,int,void(*)(void*));
int sqlite3_bind_text16(sqlite3_stmt*, int, const void*, int, void(*)(void*));
int sqlite3_bind_text64(sqlite3_stmt*, int, const char*, sqlite3_uint64,
                         void(*)(void*), unsigned char encoding);
int sqlite3_bind_value(sqlite3_stmt*, int, const sqlite3_value*);
int sqlite3_bind_pointer(sqlite3_stmt*, int, void*, const char*,void(*)(void*));
int sqlite3_bind_zeroblob(sqlite3_stmt*, int, int n);
int sqlite3_bind_zeroblob64(sqlite3_stmt*, int, sqlite3_uint64);

/*
** CAPI3REF: Number Of SQL Parameters
** METHOD: sqlite3_stmt
**

**
** ^The sqlite3_value_text16() interface extracts a UTF-16 string
** in the native byte-order of the host machine.  ^The
** sqlite3_value_text16be() and sqlite3_value_text16le() interfaces
** extract UTF-16 strings as big-endian and little-endian respectively.
**
** ^If [sqlite3_value] object V was initialized 
** using [sqlite3_bind_pointer(S,I,P,X,D)] or [sqlite3_result_pointer(C,P,X,D)]
** and if X and Y are strings that compare equal according to strcmp(X,Y),
** then sqlite3_value_pointer(V,Y) will return the pointer P.  ^Otherwise,
** sqlite3_value_pointer(V,Y) returns a NULL. The sqlite3_bind_pointer() 
** routine is part of the [pointer passing interface] added for SQLite 3.20.0.
**
** ^(The sqlite3_value_type(V) interface returns the
** [SQLITE_INTEGER | datatype code] for the initial datatype of the
** [sqlite3_value] object V. The returned value is one of [SQLITE_INTEGER],
** [SQLITE_FLOAT], [SQLITE_TEXT], [SQLITE_BLOB], or [SQLITE_NULL].)^
** Other interfaces might change the datatype for an sqlite3_value object.
** For example, if the datatype is initially SQLITE_INTEGER and

** sqlite3_result_value() interface makes a copy of the [sqlite3_value]
** so that the [sqlite3_value] specified in the parameter may change or
** be deallocated after sqlite3_result_value() returns without harm.
** ^A [protected sqlite3_value] object may always be used where an
** [unprotected sqlite3_value] object is required, so either
** kind of [sqlite3_value] object can be used with this interface.
**
** ^The sqlite3_result_pointer(C,P,T,D) interface sets the result to an
** SQL NULL value, just like [sqlite3_result_null(C)], except that it
** also associates the host-language pointer P or type T with that 
** NULL value such that the pointer can be retrieved within an
** [application-defined SQL function] using [sqlite3_value_pointer()].
** ^If the D parameter is not NULL, then it is a pointer to a destructor
** for the P parameter.  ^SQLite invokes D with P as its only argument
** when SQLite is finished with P.  The T parameter should be a static



** string and preferably a string literal. The sqlite3_result_pointer()
** routine is part of the [pointer passing interface] added for SQLite 3.20.0.
**
** If these routines are called from within the different thread
** than the one containing the application-defined function that received
** the [sqlite3_context] pointer, the results are undefined.
*/
void sqlite3_result_blob(sqlite3_context*, const void*, int, void(*)(void*));
void sqlite3_result_blob64(sqlite3_context*,const void*,

void sqlite3_result_text(sqlite3_context*, const char*, int, void(*)(void*));
void sqlite3_result_text64(sqlite3_context*, const char*,sqlite3_uint64,
                           void(*)(void*), unsigned char encoding);
void sqlite3_result_text16(sqlite3_context*, const void*, int, void(*)(void*));
void sqlite3_result_text16le(sqlite3_context*, const void*, int,void(*)(void*));
void sqlite3_result_text16be(sqlite3_context*, const void*, int,void(*)(void*));
void sqlite3_result_value(sqlite3_context*, sqlite3_value*);
void sqlite3_result_pointer(sqlite3_context*, void*,const char*,void(*)(void*));
void sqlite3_result_zeroblob(sqlite3_context*, int n);
int sqlite3_result_zeroblob64(sqlite3_context*, sqlite3_uint64 n);


/*
** CAPI3REF: Setting The Subtype Of An SQL Function
** METHOD: sqlite3_context

  /* Version 3.18.0 and later */
  void (*set_last_insert_rowid)(sqlite3*,sqlite3_int64);
  /* Version 3.20.0 and later */
  int (*prepare_v3)(sqlite3*,const char*,int,unsigned int,
                    sqlite3_stmt**,const char**);
  int (*prepare16_v3)(sqlite3*,const void*,int,unsigned int,
                      sqlite3_stmt**,const void**);
  int (*bind_pointer)(sqlite3_stmt*,int,void*,const char*,void(*)(void*));
  void (*result_pointer)(sqlite3_context*,void*,const char*,void(*)(void*));
  void *(*value_pointer)(sqlite3_value*,const char*);
};

/*
** This is the function signature used for all extension entry points.  It
** is also defined in the file "loadext.c".
*/

struct sqlite3 {
  sqlite3_vfs *pVfs;            /* OS Interface */
  struct Vdbe *pVdbe;           /* List of active virtual machines */
  CollSeq *pDfltColl;           /* The default collating sequence (BINARY) */
  sqlite3_mutex *mutex;         /* Connection mutex */
  Db *aDb;                      /* All backends */
  int nDb;                      /* Number of backends currently in use */
  u32 mDbFlags;                 /* flags recording internal state */
  u32 flags;                    /* flags settable by pragmas. See below */
  i64 lastRowid;                /* ROWID of most recent insert (see above) */
  i64 szMmap;                   /* Default mmap_size setting */
  unsigned int openFlags;       /* Flags passed to sqlite3_vfs.xOpen() */
  int errCode;                  /* Most recent error code (SQLITE_*) */
  int errMask;                  /* & result codes with this before returning */
  int iSysErrno;                /* Errno value from last system error */
  u16 dbOptFlags;               /* Flags to enable/disable optimizations */

#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_ForeignKeys    0x00004000  /* Enforce foreign key constraints  */
#define SQLITE_AutoIndex      0x00008000  /* Enable automatic indexes */
#define SQLITE_LoadExtension  0x00010000  /* Enable load_extension */
#define SQLITE_LoadExtFunc    0x00020000  /* Enable load_extension() SQL func */
#define SQLITE_EnableTrigger  0x00040000  /* True to enable triggers */
#define SQLITE_DeferFKs       0x00080000  /* Defer all FK constraints */
#define SQLITE_QueryOnly      0x00100000  /* Disable database changes */
#define SQLITE_CellSizeCk     0x00200000  /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer  0x00400000  /* Enable fts3_tokenizer(2) */
#define SQLITE_EnableQPSG     0x00800000  /* Query Planner Stability Guarantee */






/* Flags used only if debugging */
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       0x08000000  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x10000000  /* Debug listings of VDBE programs */
#define SQLITE_VdbeTrace      0x20000000  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace 0x40000000  /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_VdbeEQP        0x80000000  /* Debug EXPLAIN QUERY PLAN */
#endif

/*
** Allowed values for sqlite3.mDbFlags
*/
#define DBFLAG_SchemaChange   0x0001  /* Uncommitted Hash table changes */
#define DBFLAG_PreferBuiltin  0x0002  /* Preference to built-in funcs */
#define DBFLAG_Vacuum         0x0004  /* Currently in a VACUUM */

/*
** Bits of the sqlite3.dbOptFlags field that are used by the
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to
** selectively disable various optimizations.
*/
#define SQLITE_QueryFlattener 0x0001   /* Query flattening */

*/
struct UnpackedRecord {
  KeyInfo *pKeyInfo;  /* Collation and sort-order information */
  Mem *aMem;          /* Values */
  u16 nField;         /* Number of entries in apMem[] */
  i8 default_rc;      /* Comparison result if keys are equal */
  u8 errCode;         /* Error detected by xRecordCompare (CORRUPT or NOMEM) */
  i8 r1;              /* Value to return if (lhs < rhs) */
  i8 r2;              /* Value to return if (lhs > rhs) */
  u8 eqSeen;          /* True if an equality comparison has been seen */
};


/*
** Each SQL index is represented in memory by an
** instance of the following structure.

    if( pTrigger->pSchema==pTrigger->pTabSchema ){
      Table *pTab = tableOfTrigger(pTrigger);
      Trigger **pp;
      for(pp=&pTab->pTrigger; *pp!=pTrigger; pp=&((*pp)->pNext));
      *pp = (*pp)->pNext;
    }
    sqlite3DeleteTrigger(db, pTrigger);
    db->mDbFlags |= DBFLAG_SchemaChange;
  }
}

/*
** pEList is the SET clause of an UPDATE statement.  Each entry
** in pEList is of the format <id>=<expr>.  If any of the entries
** in pEList have an <id> which matches an identifier in pIdList,

/*
** This routine implements the OP_Vacuum opcode of the VDBE.
*/
int sqlite3RunVacuum(char **pzErrMsg, sqlite3 *db, int iDb){
  int rc = SQLITE_OK;     /* Return code from service routines */
  Btree *pMain;           /* The database being vacuumed */
  Btree *pTemp;           /* The temporary database we vacuum into */
  u16 saved_mDbFlags;     /* Saved value of db->mDbFlags */
  u32 saved_flags;        /* Saved value of db->flags */
  int saved_nChange;      /* Saved value of db->nChange */
  int saved_nTotalChange; /* Saved value of db->nTotalChange */
  u8 saved_mTrace;        /* Saved trace settings */
  Db *pDb = 0;            /* Database to detach at end of vacuum */
  int isMemDb;            /* True if vacuuming a :memory: database */
  int nRes;               /* Bytes of reserved space at the end of each page */
  int nDb;                /* Number of attached databases */

    return SQLITE_ERROR;
  }

  /* Save the current value of the database flags so that it can be 
  ** restored before returning. Then set the writable-schema flag, and
  ** disable CHECK and foreign key constraints.  */
  saved_flags = db->flags;
  saved_mDbFlags = db->mDbFlags;
  saved_nChange = db->nChange;
  saved_nTotalChange = db->nTotalChange;
  saved_mTrace = db->mTrace;
  db->flags |= SQLITE_WriteSchema | SQLITE_IgnoreChecks;
  db->mDbFlags |= DBFLAG_PreferBuiltin | DBFLAG_Vacuum;
  db->flags &= ~(SQLITE_ForeignKeys | SQLITE_ReverseOrder | SQLITE_CountRows);
  db->mTrace = 0;

  zDbMain = db->aDb[iDb].zDbSName;
  pMain = db->aDb[iDb].pBt;
  isMemDb = sqlite3PagerIsMemdb(sqlite3BtreePager(pMain));

  rc = execSqlF(db, pzErrMsg,
      "SELECT'INSERT INTO vacuum_db.'||quote(name)"
      "||' SELECT*FROM\"%w\".'||quote(name)"
      "FROM vacuum_db.sqlite_master "
      "WHERE type='table'AND coalesce(rootpage,1)>0",
      zDbMain
  );
  assert( (db->mDbFlags & DBFLAG_Vacuum)!=0 );
  db->mDbFlags &= ~DBFLAG_Vacuum;
  if( rc!=SQLITE_OK ) goto end_of_vacuum;

  /* Copy the triggers, views, and virtual tables from the main database
  ** over to the temporary database.  None of these objects has any
  ** associated storage, so all we have to do is copy their entries
  ** from the SQLITE_MASTER table.
  */

  assert( rc==SQLITE_OK );
  rc = sqlite3BtreeSetPageSize(pMain, sqlite3BtreeGetPageSize(pTemp), nRes,1);

end_of_vacuum:
  /* Restore the original value of db->flags */
  db->init.iDb = 0;
  db->mDbFlags = saved_mDbFlags;
  db->flags = saved_flags;
  db->nChange = saved_nChange;
  db->nTotalChange = saved_nTotalChange;
  db->mTrace = saved_mTrace;
  sqlite3BtreeSetPageSize(pMain, -1, -1, 1);

  /* Currently there is an SQL level transaction open on the vacuum

        }
        db->isTransactionSavepoint = 0;
        rc = p->rc;
      }else{
        int isSchemaChange;
        iSavepoint = db->nSavepoint - iSavepoint - 1;
        if( p1==SAVEPOINT_ROLLBACK ){
          isSchemaChange = (db->mDbFlags & DBFLAG_SchemaChange)!=0;
          for(ii=0; ii<db->nDb; ii++){
            rc = sqlite3BtreeTripAllCursors(db->aDb[ii].pBt,
                                       SQLITE_ABORT_ROLLBACK,
                                       isSchemaChange==0);
            if( rc!=SQLITE_OK ) goto abort_due_to_error;
          }
        }else{
          isSchemaChange = 0;
        }
        for(ii=0; ii<db->nDb; ii++){
          rc = sqlite3BtreeSavepoint(db->aDb[ii].pBt, p1, iSavepoint);
          if( rc!=SQLITE_OK ){
            goto abort_due_to_error;
          }
        }
        if( isSchemaChange ){
          sqlite3ExpirePreparedStatements(db);
          sqlite3ResetAllSchemasOfConnection(db);
          db->mDbFlags |= DBFLAG_SchemaChange;
        }
      }
  
      /* Regardless of whether this is a RELEASE or ROLLBACK, destroy all 
      ** savepoints nested inside of the savepoint being operated on. */
      while( db->pSavepoint!=pSavepoint ){
        pTmp = db->pSavepoint;

  assert( pDb->pBt!=0 );
  assert( sqlite3SchemaMutexHeld(db, pOp->p1, 0) );
  /* See note about index shifting on OP_ReadCookie */
  rc = sqlite3BtreeUpdateMeta(pDb->pBt, pOp->p2, pOp->p3);
  if( pOp->p2==BTREE_SCHEMA_VERSION ){
    /* When the schema cookie changes, record the new cookie internally */
    pDb->pSchema->schema_cookie = pOp->p3;
    db->mDbFlags |= DBFLAG_SchemaChange;
  }else if( pOp->p2==BTREE_FILE_FORMAT ){
    /* Record changes in the file format */
    pDb->pSchema->file_format = pOp->p3;
  }
  if( pOp->p1==1 ){
    /* Invalidate all prepared statements whenever the TEMP database
    ** schema is changed.  Ticket #1644 */

** structures. Each Mem struct may cache multiple representations (string,
** integer etc.) of the same value.
*/
struct sqlite3_value {
  union MemValue {
    double r;           /* Real value used when MEM_Real is set in flags */
    i64 i;              /* Integer value used when MEM_Int is set in flags */
    int nZero;          /* Extra zero bytes when MEM_Zero and MEM_Blob set */
    const char *zPType; /* Pointer type when MEM_Term|MEM_Subtype|MEM_Null */
    FuncDef *pDef;      /* Used only when flags==MEM_Agg */
    RowSet *pRowSet;    /* Used only when flags==MEM_RowSet */
    VdbeFrame *pFrame;  /* Used when flags==MEM_Frame */
  } u;
  u16 flags;          /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */
  u8  enc;            /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */
  u8  eSubtype;       /* Subtype for this value */

*/
#define MEMCELLSIZE offsetof(Mem,zMalloc)

/* One or more of the following flags are set to indicate the validOK
** representations of the value stored in the Mem struct.
**
** If the MEM_Null flag is set, then the value is an SQL NULL value.
** For a pointer type created using sqlite3_bind_pointer() or
** sqlite3_result_pointer() the MEM_Term and MEM_Subtype flags are also set.
**
** If the MEM_Str flag is set then Mem.z points at a string representation.
** Usually this is encoded in the same unicode encoding as the main
** database (see below for exceptions). If the MEM_Term flag is also
** set, then the string is nul terminated. The MEM_Int and MEM_Real 
** flags may coexist with the MEM_Str flag.
*/
#define MEM_Null      0x0001   /* Value is NULL (or a pointer) */
#define MEM_Str       0x0002   /* Value is a string */
#define MEM_Int       0x0004   /* Value is an integer */
#define MEM_Real      0x0008   /* Value is a real number */
#define MEM_Blob      0x0010   /* Value is a BLOB */
#define MEM_AffMask   0x001f   /* Mask of affinity bits */
#define MEM_RowSet    0x0020   /* Value is a RowSet object */
#define MEM_Frame     0x0040   /* Value is a VdbeFrame object */
#define MEM_Undefined 0x0080   /* Value is undefined */
#define MEM_Cleared   0x0100   /* NULL set by OP_Null, not from data */
#define MEM_TypeMask  0xc1ff   /* Mask of type bits */


/* Whenever Mem contains a valid string or blob representation, one of
** the following flags must be set to determine the memory management
** policy for Mem.z.  The MEM_Term flag tells us whether or not the
** string is \000 or \u0000 terminated
*/
#define MEM_Term      0x0200   /* String in Mem.z is zero terminated */
#define MEM_Dyn       0x0400   /* Need to call Mem.xDel() on Mem.z */
#define MEM_Static    0x0800   /* Mem.z points to a static string */
#define MEM_Ephem     0x1000   /* Mem.z points to an ephemeral string */
#define MEM_Agg       0x2000   /* Mem.z points to an agg function context */
#define MEM_Zero      0x4000   /* Mem.i contains count of 0s appended to blob */
#define MEM_Subtype   0x8000   /* Mem.eSubtype is valid */
#ifdef SQLITE_OMIT_INCRBLOB

int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*));
void sqlite3VdbeMemSetInt64(Mem*, i64);
#ifdef SQLITE_OMIT_FLOATING_POINT
# define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64
#else
  void sqlite3VdbeMemSetDouble(Mem*, double);
#endif
void sqlite3VdbeMemSetPointer(Mem*, void*, const char*, void(*)(void*));
void sqlite3VdbeMemInit(Mem*,sqlite3*,u16);
void sqlite3VdbeMemSetNull(Mem*);
void sqlite3VdbeMemSetZeroBlob(Mem*,int);
void sqlite3VdbeMemSetRowSet(Mem*);
int sqlite3VdbeMemMakeWriteable(Mem*);
int sqlite3VdbeMemStringify(Mem*, u8, u8);
i64 sqlite3VdbeIntValue(Mem*);

}
unsigned int sqlite3_value_subtype(sqlite3_value *pVal){
  Mem *pMem = (Mem*)pVal;
  return ((pMem->flags & MEM_Subtype) ? pMem->eSubtype : 0);
}
void *sqlite3_value_pointer(sqlite3_value *pVal, const char *zPType){
  Mem *p = (Mem*)pVal;
  if( (p->flags&(MEM_TypeMask|MEM_Term|MEM_Subtype)) ==
                 (MEM_Null|MEM_Term|MEM_Subtype)
   && zPType!=0
   && p->eSubtype=='p'
   && strcmp(p->u.zPType, zPType)==0
  ){
    return (void*)p->z;
  }else{
    return 0;
  }
}
const unsigned char *sqlite3_value_text(sqlite3_value *pVal){
  return (const unsigned char *)sqlite3ValueText(pVal, SQLITE_UTF8);
}

  assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
  sqlite3VdbeMemSetInt64(pCtx->pOut, iVal);
}
void sqlite3_result_null(sqlite3_context *pCtx){
  assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
  sqlite3VdbeMemSetNull(pCtx->pOut);
}
void sqlite3_result_pointer(
  sqlite3_context *pCtx,
  void *pPtr,
  const char *zPType,
  void (*xDestructor)(void*)
){
  Mem *pOut = pCtx->pOut;
  assert( sqlite3_mutex_held(pOut->db->mutex) );
  sqlite3VdbeMemSetNull(pOut);
  sqlite3VdbeMemSetPointer(pOut, pPtr, zPType, xDestructor);
}
void sqlite3_result_subtype(sqlite3_context *pCtx, unsigned int eSubtype){
  Mem *pOut = pCtx->pOut;
  assert( sqlite3_mutex_held(pOut->db->mutex) );
  pOut->eSubtype = eSubtype & 0xff;
  pOut->flags |= MEM_Subtype;
}

  Vdbe *p = (Vdbe*)pStmt;
  rc = vdbeUnbind(p, i);
  if( rc==SQLITE_OK ){
    sqlite3_mutex_leave(p->db->mutex);
  }
  return rc;
}
int sqlite3_bind_pointer(
  sqlite3_stmt *pStmt,
  int i,
  void *pPtr,
  const char *zPTtype,
  void (*xDestructor)(void*)
){
  int rc;
  Vdbe *p = (Vdbe*)pStmt;
  rc = vdbeUnbind(p, i);
  if( rc==SQLITE_OK ){
    sqlite3VdbeMemSetPointer(&p->aVar[i-1], pPtr, zPTtype, xDestructor);
    sqlite3_mutex_leave(p->db->mutex);
  }else if( xDestructor ){
    xDestructor(pPtr);
  }
  return rc;
}
int sqlite3_bind_text( 
  sqlite3_stmt *pStmt, 
  int i, 
  const char *zData, 

**
** OP_PureFunc means that the function must be deterministic, and should
** throw an error if it is given inputs that would make it non-deterministic.
** This routine is invoked by date/time functions that use non-deterministic
** features such as 'now'.
*/
int sqlite3NotPureFunc(sqlite3_context *pCtx){
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  if( pCtx->pVdbe==0 ) return 1;
#endif
  if( pCtx->pVdbe->aOp[pCtx->iOp].opcode==OP_PureFunc ){
    sqlite3_result_error(pCtx, 
       "non-deterministic function in index expression or CHECK constraint",
       -1);
    return 0;
  }
  return 1;

** Check invariants on a Mem object.
**
** This routine is intended for use inside of assert() statements, like
** this:    assert( sqlite3VdbeCheckMemInvariants(pMem) );
*/
int sqlite3VdbeCheckMemInvariants(Mem *p){
  /* If MEM_Dyn is set then Mem.xDel!=0.  
  ** Mem.xDel might not be initialized if MEM_Dyn is clear.
  */
  assert( (p->flags & MEM_Dyn)==0 || p->xDel!=0 );

  /* MEM_Dyn may only be set if Mem.szMalloc==0.  In this way we
  ** ensure that if Mem.szMalloc>0 then it is safe to do
  ** Mem.z = Mem.zMalloc without having to check Mem.flags&MEM_Dyn.
  ** That saves a few cycles in inner loops. */
  assert( (p->flags & MEM_Dyn)==0 || p->szMalloc==0 );

  /* Cannot be both MEM_Int and MEM_Real at the same time */
  assert( (p->flags & (MEM_Int|MEM_Real))!=(MEM_Int|MEM_Real) );

  if( p->flags & MEM_Null ){
    /* Cannot be both MEM_Null and some other type */
    assert( (p->flags & (MEM_Int|MEM_Real|MEM_Str|MEM_Blob
                         |MEM_RowSet|MEM_Frame|MEM_Agg|MEM_Zero))==0 );

    /* If MEM_Null is set, then either the value is a pure NULL (the usual
    ** case) or it is a pointer set using sqlite3_bind_pointer() or
    ** sqlite3_result_pointer().  If a pointer, then MEM_Term must also be
    ** set.
    */
    if( (p->flags & (MEM_Term|MEM_Subtype))==(MEM_Term|MEM_Subtype) ){
      /* This is a pointer type.  There may be a flag to indicate what to
      ** do with the pointer. */
      assert( ((p->flags&MEM_Dyn)!=0 ? 1 : 0) +
              ((p->flags&MEM_Ephem)!=0 ? 1 : 0) +
              ((p->flags&MEM_Static)!=0 ? 1 : 0) <= 1 );

      /* No other bits set */
      assert( (p->flags & ~(MEM_Null|MEM_Term|MEM_Subtype
                           |MEM_Dyn|MEM_Ephem|MEM_Static))==0 );
    }else{
      /* A pure NULL might have other flags, such as MEM_Static, MEM_Dyn,
      ** MEM_Ephem, MEM_Cleared, or MEM_Subtype */
    }
  }else{
    /* The MEM_Cleared bit is only allowed on NULLs */
    assert( (p->flags & MEM_Cleared)==0 );
  }

  /* The szMalloc field holds the correct memory allocation size */
  assert( p->szMalloc==0
       || p->szMalloc==sqlite3DbMallocSize(p->db,p->zMalloc) );

  /* If p holds a string or blob, the Mem.z must point to exactly
  ** one of the following:

    vdbeReleaseAndSetInt64(pMem, val);
  }else{
    pMem->u.i = val;
    pMem->flags = MEM_Int;
  }
}

/* A no-op destructor */
static void sqlite3NoopDestructor(void *p){ UNUSED_PARAMETER(p); }

/*
** Set the value stored in *pMem should already be a NULL.
** Also store a pointer to go with it.
*/
void sqlite3VdbeMemSetPointer(
  Mem *pMem,
  void *pPtr,
  const char *zPType,
  void (*xDestructor)(void*)
){
  assert( pMem->flags==MEM_Null );
  pMem->u.zPType = zPType ? zPType : "";
  pMem->z = pPtr;
  pMem->flags = MEM_Null|MEM_Dyn|MEM_Subtype|MEM_Term;

  pMem->eSubtype = 'p';
  pMem->xDel = xDestructor ? xDestructor : sqlite3NoopDestructor;

}

#ifndef SQLITE_OMIT_FLOATING_POINT
/*
** Delete any previous value and set the value stored in *pMem to val,
** manifest type REAL.
*/

  if( pExpr->op==TK_IS 
   || pExpr->op==TK_ISNULL || pExpr->op==TK_ISNOT 
   || pExpr->op==TK_NOTNULL || pExpr->op==TK_CASE 
  ){
    pWalker->eCode = 1;
  }else if( pExpr->op==TK_FUNCTION ){
    int d1;
    char d2[4];
    if( 0==sqlite3IsLikeFunction(pWalker->pParse->db, pExpr, &d1, d2) ){
      pWalker->eCode = 1;
    }
  }

  return WRC_Continue;
}

  int *pnoCase      /* True if uppercase is equivalent to lowercase */
){
  const char *z = 0;         /* String on RHS of LIKE operator */
  Expr *pRight, *pLeft;      /* Right and left size of LIKE operator */
  ExprList *pList;           /* List of operands to the LIKE operator */
  int c;                     /* One character in z[] */
  int cnt;                   /* Number of non-wildcard prefix characters */
  char wc[4];                /* Wildcard characters */
  sqlite3 *db = pParse->db;  /* Database connection */
  sqlite3_value *pVal = 0;
  int op;                    /* Opcode of pRight */
  int rc;                    /* Result code to return */

  if( !sqlite3IsLikeFunction(db, pExpr, pnoCase, wc) ){
    return 0;

       || sqlite3ExprAffinity(pLeft)!=SQLITE_AFF_TEXT 
       || IsVirtual(pLeft->pTab)  /* Value might be numeric */
      ){
        sqlite3ValueFree(pVal);
        return 0;
      }
    }

    /* Count the number of prefix characters prior to the first wildcard */
    cnt = 0;
    while( (c=z[cnt])!=0 && c!=wc[0] && c!=wc[1] && c!=wc[2] ){
      cnt++;
      if( c==wc[3] && z[cnt]!=0 ){
        if( z[cnt++]>0xc0 ) while( (z[cnt]&0xc0)==0x80 ){ cnt++; }
      }
    }

    /* The optimization is possible only if (1) the pattern does not begin
    ** with a wildcard and if (2) the non-wildcard prefix does not end with
    ** an (illegal 0xff) character.  The second condition is necessary so
    ** that we can increment the prefix key to find an upper bound for the
    ** range search. 
    */
    if( cnt!=0 && 255!=(u8)z[cnt-1] ){
      Expr *pPrefix;

      /* A "complete" match if the pattern ends with "*" or "%" */
      *pisComplete = c==wc[0] && z[cnt+1]==0;

      /* Get the pattern prefix.  Remove all escapes from the prefix. */
      pPrefix = sqlite3Expr(db, TK_STRING, z);
      if( pPrefix ){
        int iFrom, iTo;
        char *zNew = pPrefix->u.zToken;
        zNew[cnt] = 0;
        for(iFrom=iTo=0; iFrom<cnt; iFrom++){
          if( zNew[iFrom]==wc[3] ) iFrom++;
          zNew[iTo++] = zNew[iFrom];
        }
        zNew[iTo] = 0;
      }
      *ppPrefix = pPrefix;

      /* If the RHS pattern is a bound parameter, make arrangements to
      ** reprepare the statement when that parameter is rebound */
      if( op==TK_VARIABLE ){
        Vdbe *v = pParse->pVdbe;
        sqlite3VdbeSetVarmask(v, pRight->iColumn);
        if( *pisComplete && pRight->u.zToken[1] ){
          /* If the rhs of the LIKE expression is a variable, and the current
          ** value of the variable means there is no need to invoke the LIKE
          ** function, then no OP_Variable will be added to the program.

    PRAGMA case_sensitive_like=on;
    CREATE INDEX i1 ON t1(x);
  }
  queryplan {
    SELECT x FROM t1 WHERE x LIKE 'abc%' ORDER BY 1;
  }
} {abc abcd nosort {} i1}
do_test like-3.3.100.cnt {
  set sqlite_like_count
} 0

# The like optimization works even when the pattern is a bound parameter
#
# Exception: It does not work if sqlite3_prepare() is used instead of
# sqlite3_prepare_v2(), as in that case the statement cannot be reprepared

    set x [lindex [time {
      db one {SELECT 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaz'LIKE'%a%a%a%a%a%a%a%a%y'}
    }] 0]
    puts -nonewline " ($x ms - want less than 1000) "
    expr {$x<1000}
  } {1}
}

# As of 2017-07-27 (3.21.0) the LIKE optimization works with ESCAPE as
# long as the ESCAPE is a single-byte literal.
#
db close
sqlite3 db :memory:
do_execsql_test like-15.100 {
  CREATE TABLE t15(x TEXT COLLATE nocase, y, PRIMARY KEY(x));
  INSERT INTO t15(x,y) VALUES
    ('abcde',1), ('ab%de',2), ('a_cde',3),
    ('uvwxy',11),('uvwx%',12),('uvwx_',13),
    ('_bcde',21),('%bcde',22),
    ('abcd_',31),('abcd%',32),
    ('ab%xy',41);
  SELECT y FROM t15 WHERE x LIKE 'ab/%d%' ESCAPE '/';
} {2}
do_execsql_test like-15.101 {
  EXPLAIN QUERY PLAN
  SELECT y FROM t15 WHERE x LIKE 'ab/%d%' ESCAPE '/';
} {/SEARCH/}
do_execsql_test like-15.102 {
  EXPLAIN QUERY PLAN
  SELECT y FROM t15 WHERE x LIKE 'ab/%d%' ESCAPE '//';
} {/SCAN/}
do_execsql_test like-15.103 {
  EXPLAIN QUERY PLAN
  SELECT y FROM t15 WHERE x LIKE 'ab/%d%' ESCAPE '';
} {/SCAN/}
do_execsql_test like-15.110 {
  SELECT y FROM t15 WHERE x LIKE 'abcdx%%' ESCAPE 'x';
} {32}
do_execsql_test like-15.111 {
  SELECT y FROM t15 WHERE x LIKE 'abx%%' ESCAPE 'x' ORDER BY +y
} {2 41}
do_execsql_test like-15.112 {
  EXPLAIN QUERY PLAN
  SELECT y FROM t15 WHERE x LIKE 'abx%%' ESCAPE 'x' ORDER BY +y
} {/SEARCH/}
do_execsql_test like-15.120 {
  SELECT y FROM t15 WHERE x LIKE '/%bc%' ESCAPE '/';
} {22}
do_execsql_test like-15.121 {
  EXPLAIN QUERY PLAN
  SELECT y FROM t15 WHERE x LIKE '/%bc%' ESCAPE '/';
} {/SEARCH/}




finish_test

# focus of this file is percentile.c extension
#

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

ifcapable !vtab {
  finish_test
  return
}

forcedelete test.db2
do_execsql_test 1.0 {
  ATTACH 'test.db2' AS aux;
  CREATE TABLE t1(a INTEGER PRIMARY KEY, b TEXT);
  CREATE TABLE t2(a INTEGER PRIMARY KEY, b TEXT);
  CREATE TABLE aux.t3(a INTEGER PRIMARY KEY, b TEXT);

ECHO.

:skip_sdkEnvironment

GOTO no_errors

:fn_TclKitX86Variables
  REM
  REM NOTE: By default, use latest available version of the TclKit SDK
  REM       for x86.  However, the "default" TclKit executable for x86
  REM       is still used here because it is the only one "well-known"
  REM       to be available for download.
  REM
  IF NOT DEFINED TCLKIT_PATCHLEVEL (
    SET TCLKIT_PATCHLEVEL=8.6.6
  )
  SET TCLKIT_VERSION=%TCLKIT_PATCHLEVEL:.=%
  SET TCLKIT_VERSION=%TCLKIT_VERSION:~0,2%
  REM SET TCLKIT_EXE=tclkit-%TCLKIT_PATCHLEVEL%.exe
  SET TCLKIT_EXE=tclkit-8.6.4.exe
  SET TCLKIT_LIB=libtclkit%TCLKIT_PATCHLEVEL:.=%.lib
  SET TCLKIT_LIB_STUB=libtclstub%TCLKIT_VERSION:.=%.a
  SET TCLKIT_SDK=libtclkit-sdk-x86-%TCLKIT_PATCHLEVEL%
  SET TCLKIT_SDK_ZIP=%TCLKIT_SDK%.zip
  SET TCLKIT_FILES=%TCLKIT_EXE%
  IF NOT DEFINED TCLKIT_NOENV IF NOT DEFINED TCLKIT_NOSDK (
    SET TCLKIT_FILES=%TCLKIT_FILES% unzip.exe %TCLKIT_SDK_ZIP%
  )
  GOTO :EOF

:fn_TclKitX64Variables

  REM
  REM NOTE: By default, use latest available version of the TclKit SDK
  REM       for x64.  However, the "default" TclKit executable for x86
  REM       is still used here because it is the only one "well-known"
  REM       to be available for download.
  REM
  IF NOT DEFINED TCLKIT_PATCHLEVEL (


    SET TCLKIT_PATCHLEVEL=8.6.6
  )
  SET TCLKIT_VERSION=%TCLKIT_PATCHLEVEL:.=%
  SET TCLKIT_VERSION=%TCLKIT_VERSION:~0,2%
  REM SET TCLKIT_EXE=tclkit-%TCLKIT_PATCHLEVEL%.exe
  SET TCLKIT_EXE=tclkit-8.6.4.exe
  SET TCLKIT_LIB=libtclkit%TCLKIT_PATCHLEVEL:.=%.lib
  SET TCLKIT_LIB_STUB=libtclstub%TCLKIT_VERSION:.=%.a
  SET TCLKIT_SDK=libtclkit-sdk-x64-%TCLKIT_PATCHLEVEL%
  SET TCLKIT_SDK_ZIP=%TCLKIT_SDK%.zip
  SET TCLKIT_FILES=%TCLKIT_EXE%
  IF NOT DEFINED TCLKIT_NOENV IF NOT DEFINED TCLKIT_NOSDK (
    SET TCLKIT_FILES=%TCLKIT_FILES% unzip.exe %TCLKIT_SDK_ZIP%