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Overview
Comment:Merge all recent trunk fixes and enhancements into the sessions branch.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | sessions
Files: files | file ages | folders
SHA1: e65e65f9bc9b4bf5c9dd6e3a77a0d5f03c40e006
User & Date: drh 2015-04-15 14:14:38
Context
2015-04-16
13:52
Fix a stray backslash character in a printf format string in sessionDiffFindModified() check-in: abb192a1 user: drh tags: sessions
2015-04-15
14:14
Merge all recent trunk fixes and enhancements into the sessions branch. check-in: e65e65f9 user: drh tags: sessions
09:16
Remove an incorrect assert() statement from sqlite3Fts3Dequote(). check-in: bd06eeb8 user: dan tags: trunk
2015-04-12
01:33
Merge all recent trunk enhancements into the sessions branch. check-in: 5f14f34f user: drh tags: sessions
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to VERSION.

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3.8.9
|
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3.8.10

Changes to configure.

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#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.62 for sqlite 3.8.9.
#
# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
# 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
# This configure script is free software; the Free Software Foundation
# gives unlimited permission to copy, distribute and modify it.
## --------------------- ##
## M4sh Initialization.  ##
................................................................................
MFLAGS=
MAKEFLAGS=
SHELL=${CONFIG_SHELL-/bin/sh}

# Identity of this package.
PACKAGE_NAME='sqlite'
PACKAGE_TARNAME='sqlite'
PACKAGE_VERSION='3.8.9'
PACKAGE_STRING='sqlite 3.8.9'
PACKAGE_BUGREPORT=''

# Factoring default headers for most tests.
ac_includes_default="\
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
# include <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 3.8.9 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 3.8.9:";;
   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 3.8.9
generated by GNU Autoconf 2.62

Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
2002, 2003, 2004, 2005, 2006, 2007, 2008 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
fi
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 3.8.9, which was
generated by GNU Autoconf 2.62.  Invocation command line was

  $ $0 $@

_ACEOF
exec 5>>config.log
{
................................................................................

exec 6>&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 3.8.9, which was
generated by GNU Autoconf 2.62.  Invocation command line was

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

Report bugs to <bug-autoconf@gnu.org>."

_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_version="\\
sqlite config.status 3.8.9
configured by $0, generated by GNU Autoconf 2.62,
  with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"

Copyright (C) 2008 Free Software Foundation, Inc.
This config.status script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it."



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#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.62 for sqlite 3.8.10.
#
# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
# 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
# This configure script is free software; the Free Software Foundation
# gives unlimited permission to copy, distribute and modify it.
## --------------------- ##
## M4sh Initialization.  ##
................................................................................
MFLAGS=
MAKEFLAGS=
SHELL=${CONFIG_SHELL-/bin/sh}

# Identity of this package.
PACKAGE_NAME='sqlite'
PACKAGE_TARNAME='sqlite'
PACKAGE_VERSION='3.8.10'
PACKAGE_STRING='sqlite 3.8.10'
PACKAGE_BUGREPORT=''

# Factoring default headers for most tests.
ac_includes_default="\
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
# include <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 3.8.10 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 3.8.10:";;
   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 3.8.10
generated by GNU Autoconf 2.62

Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
2002, 2003, 2004, 2005, 2006, 2007, 2008 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
fi
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 3.8.10, which was
generated by GNU Autoconf 2.62.  Invocation command line was

  $ $0 $@

_ACEOF
exec 5>>config.log
{
................................................................................

exec 6>&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 3.8.10, which was
generated by GNU Autoconf 2.62.  Invocation command line was

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

Report bugs to <bug-autoconf@gnu.org>."

_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_version="\\
sqlite config.status 3.8.10
configured by $0, generated by GNU Autoconf 2.62,
  with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"

Copyright (C) 2008 Free Software Foundation, Inc.
This config.status script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it."

Changes to ext/fts3/fts3.c.

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#endif

static int fts3EvalNext(Fts3Cursor *pCsr);
static int fts3EvalStart(Fts3Cursor *pCsr);
static int fts3TermSegReaderCursor(
    Fts3Cursor *, const char *, int, int, Fts3MultiSegReader **);








/* 
** Write a 64-bit variable-length integer to memory starting at p[0].
** The length of data written will be between 1 and FTS3_VARINT_MAX bytes.
** The number of bytes written is returned.
*/
int sqlite3Fts3PutVarint(char *p, sqlite_int64 v){
  unsigned char *q = (unsigned char *) p;
................................................................................
  if( quote=='[' || quote=='\'' || quote=='"' || quote=='`' ){
    int iIn = 1;                  /* Index of next byte to read from input */
    int iOut = 0;                 /* Index of next byte to write to output */

    /* If the first byte was a '[', then the close-quote character is a ']' */
    if( quote=='[' ) quote = ']';  

    while( ALWAYS(z[iIn]) ){
      if( z[iIn]==quote ){
        if( z[iIn+1]!=quote ) break;
        z[iOut++] = quote;
        iIn += 2;
      }else{
        z[iOut++] = z[iIn++];
      }
................................................................................
    case 5: iCol = sqlite3_value_int(apVal[4]);
    case 4: zEllipsis = (const char*)sqlite3_value_text(apVal[3]);
    case 3: zEnd = (const char*)sqlite3_value_text(apVal[2]);
    case 2: zStart = (const char*)sqlite3_value_text(apVal[1]);
  }
  if( !zEllipsis || !zEnd || !zStart ){
    sqlite3_result_error_nomem(pContext);


  }else if( SQLITE_OK==fts3CursorSeek(pContext, pCsr) ){
    sqlite3Fts3Snippet(pContext, pCsr, zStart, zEnd, zEllipsis, iCol, nToken);
  }
}

/*
** Implementation of the offsets() function for FTS3







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#endif

static int fts3EvalNext(Fts3Cursor *pCsr);
static int fts3EvalStart(Fts3Cursor *pCsr);
static int fts3TermSegReaderCursor(
    Fts3Cursor *, const char *, int, int, Fts3MultiSegReader **);

#ifndef SQLITE_AMALGAMATION
# if defined(SQLITE_DEBUG)
int sqlite3Fts3Always(int b) { assert( b ); return b; }
int sqlite3Fts3Never(int b)  { assert( !b ); return b; }
# endif
#endif

/* 
** Write a 64-bit variable-length integer to memory starting at p[0].
** The length of data written will be between 1 and FTS3_VARINT_MAX bytes.
** The number of bytes written is returned.
*/
int sqlite3Fts3PutVarint(char *p, sqlite_int64 v){
  unsigned char *q = (unsigned char *) p;
................................................................................
  if( quote=='[' || quote=='\'' || quote=='"' || quote=='`' ){
    int iIn = 1;                  /* Index of next byte to read from input */
    int iOut = 0;                 /* Index of next byte to write to output */

    /* If the first byte was a '[', then the close-quote character is a ']' */
    if( quote=='[' ) quote = ']';  

    while( z[iIn] ){
      if( z[iIn]==quote ){
        if( z[iIn+1]!=quote ) break;
        z[iOut++] = quote;
        iIn += 2;
      }else{
        z[iOut++] = z[iIn++];
      }
................................................................................
    case 5: iCol = sqlite3_value_int(apVal[4]);
    case 4: zEllipsis = (const char*)sqlite3_value_text(apVal[3]);
    case 3: zEnd = (const char*)sqlite3_value_text(apVal[2]);
    case 2: zStart = (const char*)sqlite3_value_text(apVal[1]);
  }
  if( !zEllipsis || !zEnd || !zStart ){
    sqlite3_result_error_nomem(pContext);
  }else if( nToken==0 ){
    sqlite3_result_text(pContext, "", -1, SQLITE_STATIC);
  }else if( SQLITE_OK==fts3CursorSeek(pContext, pCsr) ){
    sqlite3Fts3Snippet(pContext, pCsr, zStart, zEnd, zEllipsis, iCol, nToken);
  }
}

/*
** Implementation of the offsets() function for FTS3

Changes to ext/fts3/fts3Int.h.

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/*
** Macros indicating that conditional expressions are always true or
** false.
*/
#ifdef SQLITE_COVERAGE_TEST
# define ALWAYS(x) (1)
# define NEVER(X)  (0)





#else
# define ALWAYS(x) (x)
# define NEVER(x)  (x)
#endif

/*
** Internal types used by SQLite.







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/*
** Macros indicating that conditional expressions are always true or
** false.
*/
#ifdef SQLITE_COVERAGE_TEST
# define ALWAYS(x) (1)
# define NEVER(X)  (0)
#elif defined(SQLITE_DEBUG)
# define ALWAYS(x) sqlite3Fts3Always((x)!=0)
# define NEVER(x) sqlite3Fts3Never((x)!=0)
int sqlite3Fts3Always(int b);
int sqlite3Fts3Never(int b);
#else
# define ALWAYS(x) (x)
# define NEVER(x)  (x)
#endif

/*
** Internal types used by SQLite.

Changes to mkopcodeh.awk.

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# Scan for "case OP_aaaa:" lines in the vdbe.c file
/^case OP_/ {
  name = $2
  sub(/:/,"",name)
  sub("\r","",name)
  op[name] = -1       # op[x] holds the numeric value for OP symbol x
  jump[name] = 0
  out2_prerelease[name] = 0
  in1[name] = 0
  in2[name] = 0
  in3[name] = 0
  out2[name] = 0
  out3[name] = 0
  for(i=3; i<NF; i++){
    if($i=="same" && $(i+1)=="as"){
................................................................................
      sameas[val] = sym
      def[val] = name
    }
    x = $i
    sub(",","",x)
    if(x=="jump"){
      jump[name] = 1
    }else if(x=="out2-prerelease"){
      out2_prerelease[name] = 1
    }else if(x=="in1"){
      in1[name] = 1
    }else if(x=="in2"){
      in2[name] = 1
    }else if(x=="in3"){
      in3[name] = 1
    }else if(x=="out2"){
................................................................................
  #  bit 1:     pushes a result onto stack
  #  bit 2:     output to p1.  release p1 before opcode runs
  #
  for(i=0; i<=max; i++){
    name = def[i]
    a0 = a1 = a2 = a3 = a4 = a5 = a6 = a7 = 0
    if( jump[name] ) a0 = 1;
    if( out2_prerelease[name] ) a1 = 2;
    if( in1[name] ) a2 = 4;
    if( in2[name] ) a3 = 8;
    if( in3[name] ) a4 = 16;
    if( out2[name] ) a5 = 32;
    if( out3[name] ) a6 = 64;
    bv[i] = a0+a1+a2+a3+a4+a5+a6+a7;
  }
  print "\n"
  print "/* Properties such as \"out2\" or \"jump\" that are specified in"
  print "** comments following the \"case\" for each opcode in the vdbe.c"
  print "** are encoded into bitvectors as follows:"
  print "*/"
  print "#define OPFLG_JUMP            0x0001  /* jump:  P2 holds jmp target */"
  print "#define OPFLG_OUT2_PRERELEASE 0x0002  /* out2-prerelease: */"
  print "#define OPFLG_IN1             0x0004  /* in1:   P1 is an input */"
  print "#define OPFLG_IN2             0x0008  /* in2:   P2 is an input */"
  print "#define OPFLG_IN3             0x0010  /* in3:   P3 is an input */"
  print "#define OPFLG_OUT2            0x0020  /* out2:  P2 is an output */"
  print "#define OPFLG_OUT3            0x0040  /* out3:  P3 is an output */"
  print "#define OPFLG_INITIALIZER {\\"
  for(i=0; i<=max; i++){
    if( i%8==0 ) printf("/* %3d */",i)
    printf " 0x%02x,", bv[i]
    if( i%8==7 ) printf("\\\n");
  }
  print "}"







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# Scan for "case OP_aaaa:" lines in the vdbe.c file
/^case OP_/ {
  name = $2
  sub(/:/,"",name)
  sub("\r","",name)
  op[name] = -1       # op[x] holds the numeric value for OP symbol x
  jump[name] = 0

  in1[name] = 0
  in2[name] = 0
  in3[name] = 0
  out2[name] = 0
  out3[name] = 0
  for(i=3; i<NF; i++){
    if($i=="same" && $(i+1)=="as"){
................................................................................
      sameas[val] = sym
      def[val] = name
    }
    x = $i
    sub(",","",x)
    if(x=="jump"){
      jump[name] = 1


    }else if(x=="in1"){
      in1[name] = 1
    }else if(x=="in2"){
      in2[name] = 1
    }else if(x=="in3"){
      in3[name] = 1
    }else if(x=="out2"){
................................................................................
  #  bit 1:     pushes a result onto stack
  #  bit 2:     output to p1.  release p1 before opcode runs
  #
  for(i=0; i<=max; i++){
    name = def[i]
    a0 = a1 = a2 = a3 = a4 = a5 = a6 = a7 = 0
    if( jump[name] ) a0 = 1;

    if( in1[name] ) a2 = 2;
    if( in2[name] ) a3 = 4;
    if( in3[name] ) a4 = 8;
    if( out2[name] ) a5 = 16;
    if( out3[name] ) a6 = 32;
    bv[i] = a0+a1+a2+a3+a4+a5+a6;
  }
  print "\n"
  print "/* Properties such as \"out2\" or \"jump\" that are specified in"
  print "** comments following the \"case\" for each opcode in the vdbe.c"
  print "** are encoded into bitvectors as follows:"
  print "*/"
  print "#define OPFLG_JUMP            0x0001  /* jump:  P2 holds jmp target */"

  print "#define OPFLG_IN1             0x0002  /* in1:   P1 is an input */"
  print "#define OPFLG_IN2             0x0004  /* in2:   P2 is an input */"
  print "#define OPFLG_IN3             0x0008  /* in3:   P3 is an input */"
  print "#define OPFLG_OUT2            0x0010  /* out2:  P2 is an output */"
  print "#define OPFLG_OUT3            0x0020  /* out3:  P3 is an output */"
  print "#define OPFLG_INITIALIZER {\\"
  for(i=0; i<=max; i++){
    if( i%8==0 ) printf("/* %3d */",i)
    printf " 0x%02x,", bv[i]
    if( i%8==7 ) printf("\\\n");
  }
  print "}"

Changes to src/attach.c.

294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
    sqlite3_snprintf(sizeof(zErr),zErr, "database %s is locked", zName);
    goto detach_error;
  }

  sqlite3BtreeClose(pDb->pBt);
  pDb->pBt = 0;
  pDb->pSchema = 0;
  sqlite3ResetAllSchemasOfConnection(db);
  return;

detach_error:
  sqlite3_result_error(context, zErr, -1);
}

/*







|







294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
    sqlite3_snprintf(sizeof(zErr),zErr, "database %s is locked", zName);
    goto detach_error;
  }

  sqlite3BtreeClose(pDb->pBt);
  pDb->pBt = 0;
  pDb->pSchema = 0;
  sqlite3CollapseDatabaseArray(db);
  return;

detach_error:
  sqlite3_result_error(context, zErr, -1);
}

/*

Changes to src/btree.c.

6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
  }else{
    assert( bBulk==0 || bBulk==1 );
    if( iParentIdx==0 ){                 
      nxDiv = 0;
    }else if( iParentIdx==i ){
      nxDiv = i-2+bBulk;
    }else{
      assert( bBulk==0 );
      nxDiv = iParentIdx-1;
    }
    i = 2-bBulk;
  }
  nOld = i+1;
  if( (i+nxDiv-pParent->nOverflow)==pParent->nCell ){
    pRight = &pParent->aData[pParent->hdrOffset+8];







<







6731
6732
6733
6734
6735
6736
6737

6738
6739
6740
6741
6742
6743
6744
  }else{
    assert( bBulk==0 || bBulk==1 );
    if( iParentIdx==0 ){                 
      nxDiv = 0;
    }else if( iParentIdx==i ){
      nxDiv = i-2+bBulk;
    }else{

      nxDiv = iParentIdx-1;
    }
    i = 2-bBulk;
  }
  nOld = i+1;
  if( (i+nxDiv-pParent->nOverflow)==pParent->nCell ){
    pRight = &pParent->aData[pParent->hdrOffset+8];

Changes to src/build.c.

222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
      sqlite3VdbeAddOp2(v, OP_Goto, 0, 1);
    }
  }


  /* Get the VDBE program ready for execution
  */
  if( v && ALWAYS(pParse->nErr==0) && !db->mallocFailed ){
    assert( pParse->iCacheLevel==0 );  /* Disables and re-enables match */
    /* A minimum of one cursor is required if autoincrement is used
    *  See ticket [a696379c1f08866] */
    if( pParse->pAinc!=0 && pParse->nTab==0 ) pParse->nTab = 1;
    sqlite3VdbeMakeReady(v, pParse);
    pParse->rc = SQLITE_DONE;
    pParse->colNamesSet = 0;







|







222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
      sqlite3VdbeAddOp2(v, OP_Goto, 0, 1);
    }
  }


  /* Get the VDBE program ready for execution
  */
  if( v && pParse->nErr==0 && !db->mallocFailed ){
    assert( pParse->iCacheLevel==0 );  /* Disables and re-enables match */
    /* A minimum of one cursor is required if autoincrement is used
    *  See ticket [a696379c1f08866] */
    if( pParse->pAinc!=0 && pParse->nTab==0 ) pParse->nTab = 1;
    sqlite3VdbeMakeReady(v, pParse);
    pParse->rc = SQLITE_DONE;
    pParse->colNamesSet = 0;

Changes to src/expr.c.

1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
....
2012
2013
2014
2015
2016
2017
2018

2019
2020
2021
2022
2023
2024
2025
  mustBeUnique = (inFlags & IN_INDEX_LOOP)!=0;

  /* Check to see if an existing table or index can be used to
  ** satisfy the query.  This is preferable to generating a new 
  ** ephemeral table.
  */
  p = (ExprHasProperty(pX, EP_xIsSelect) ? pX->x.pSelect : 0);
  if( ALWAYS(pParse->nErr==0) && isCandidateForInOpt(p) ){
    sqlite3 *db = pParse->db;              /* Database connection */
    Table *pTab;                           /* Table <table>. */
    Expr *pExpr;                           /* Expression <column> */
    i16 iCol;                              /* Index of column <column> */
    i16 iDb;                               /* Database idx for pTab */

    assert( p );                        /* Because of isCandidateForInOpt(p) */
................................................................................
        sqlite3VdbeAddOp2(v, OP_Integer, 0, dest.iSDParm);
        VdbeComment((v, "Init EXISTS result"));
      }
      sqlite3ExprDelete(pParse->db, pSel->pLimit);
      pSel->pLimit = sqlite3PExpr(pParse, TK_INTEGER, 0, 0,
                                  &sqlite3IntTokens[1]);
      pSel->iLimit = 0;

      if( sqlite3Select(pParse, pSel, &dest) ){
        return 0;
      }
      rReg = dest.iSDParm;
      ExprSetVVAProperty(pExpr, EP_NoReduce);
      break;
    }







|







 







>







1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
....
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
  mustBeUnique = (inFlags & IN_INDEX_LOOP)!=0;

  /* Check to see if an existing table or index can be used to
  ** satisfy the query.  This is preferable to generating a new 
  ** ephemeral table.
  */
  p = (ExprHasProperty(pX, EP_xIsSelect) ? pX->x.pSelect : 0);
  if( pParse->nErr==0 && isCandidateForInOpt(p) ){
    sqlite3 *db = pParse->db;              /* Database connection */
    Table *pTab;                           /* Table <table>. */
    Expr *pExpr;                           /* Expression <column> */
    i16 iCol;                              /* Index of column <column> */
    i16 iDb;                               /* Database idx for pTab */

    assert( p );                        /* Because of isCandidateForInOpt(p) */
................................................................................
        sqlite3VdbeAddOp2(v, OP_Integer, 0, dest.iSDParm);
        VdbeComment((v, "Init EXISTS result"));
      }
      sqlite3ExprDelete(pParse->db, pSel->pLimit);
      pSel->pLimit = sqlite3PExpr(pParse, TK_INTEGER, 0, 0,
                                  &sqlite3IntTokens[1]);
      pSel->iLimit = 0;
      pSel->selFlags &= ~SF_AllValues;
      if( sqlite3Select(pParse, pSel, &dest) ){
        return 0;
      }
      rReg = dest.iSDParm;
      ExprSetVVAProperty(pExpr, EP_NoReduce);
      break;
    }

Changes to src/insert.c.

2032
2033
2034
2035
2036
2037
2038

2039
2040
2041
2042
2043
2044
2045
2046
      ** BINARY, this optimization is disabled. This is because the user 
      ** might change the definition of a collation sequence and then run
      ** a VACUUM command. In that case keys may not be written in strictly
      ** sorted order.  */
      int i;
      for(i=0; i<pSrcIdx->nColumn; i++){
        char *zColl = pSrcIdx->azColl[i];

        if( zColl && sqlite3_stricmp("BINARY", zColl) ) break;
      }
      if( i==pSrcIdx->nColumn ){
        useSeekResult = OPFLAG_USESEEKRESULT;
        sqlite3VdbeAddOp3(v, OP_Last, iDest, 0, -1);
      }
    }
    sqlite3VdbeAddOp3(v, OP_IdxInsert, iDest, regData, 1);







>
|







2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
      ** BINARY, this optimization is disabled. This is because the user 
      ** might change the definition of a collation sequence and then run
      ** a VACUUM command. In that case keys may not be written in strictly
      ** sorted order.  */
      int i;
      for(i=0; i<pSrcIdx->nColumn; i++){
        char *zColl = pSrcIdx->azColl[i];
        assert( zColl!=0 );
        if( sqlite3_stricmp("BINARY", zColl) ) break;
      }
      if( i==pSrcIdx->nColumn ){
        useSeekResult = OPFLAG_USESEEKRESULT;
        sqlite3VdbeAddOp3(v, OP_Last, iDest, 0, -1);
      }
    }
    sqlite3VdbeAddOp3(v, OP_IdxInsert, iDest, regData, 1);

Changes to src/os_unix.c.

86
87
88
89
90
91
92











93
94
95
96
97
98
99
....
6598
6599
6600
6601
6602
6603
6604

6605
6606

6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
#endif

#if SQLITE_ENABLE_LOCKING_STYLE
# include <sys/ioctl.h>
# include <sys/file.h>
# include <sys/param.h>
#endif /* SQLITE_ENABLE_LOCKING_STYLE */












#if OS_VXWORKS
# include <sys/ioctl.h>
# include <semaphore.h>
# include <limits.h>
#endif /* OS_VXWORKS */

................................................................................
#ifdef SQLITE_TEST
/* simulate multiple hosts by creating unique hostid file paths */
int sqlite3_hostid_num = 0;
#endif

#define PROXY_HOSTIDLEN    16  /* conch file host id length */


/* Not always defined in the headers as it ought to be */
extern int gethostuuid(uuid_t id, const struct timespec *wait);


/* get the host ID via gethostuuid(), pHostID must point to PROXY_HOSTIDLEN 
** bytes of writable memory.
*/
static int proxyGetHostID(unsigned char *pHostID, int *pError){
  assert(PROXY_HOSTIDLEN == sizeof(uuid_t));
  memset(pHostID, 0, PROXY_HOSTIDLEN);
# if defined(__APPLE__) && ((__MAC_OS_X_VERSION_MIN_REQUIRED > 1050) || \
                            (__IPHONE_OS_VERSION_MIN_REQUIRED > 2000))
  {
    struct timespec timeout = {1, 0}; /* 1 sec timeout */
    if( gethostuuid(pHostID, &timeout) ){
      int err = errno;
      if( pError ){
        *pError = err;
      }







>
>
>
>
>
>
>
>
>
>
>







 







>


>







|
<







86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
....
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627

6628
6629
6630
6631
6632
6633
6634
#endif

#if SQLITE_ENABLE_LOCKING_STYLE
# include <sys/ioctl.h>
# include <sys/file.h>
# include <sys/param.h>
#endif /* SQLITE_ENABLE_LOCKING_STYLE */

#if defined(__APPLE__) && ((__MAC_OS_X_VERSION_MIN_REQUIRED > 1050) || \
                           (__IPHONE_OS_VERSION_MIN_REQUIRED > 2000))
#  if (!defined(TARGET_OS_EMBEDDED) || (TARGET_OS_EMBEDDED==0)) \
       && (!defined(TARGET_IPHONE_SIMULATOR) || (TARGET_IPHONE_SIMULATOR==0))
#    define HAVE_GETHOSTUUID 1
#  else
#    warning "gethostuuid() is disabled."
#  endif
#endif


#if OS_VXWORKS
# include <sys/ioctl.h>
# include <semaphore.h>
# include <limits.h>
#endif /* OS_VXWORKS */

................................................................................
#ifdef SQLITE_TEST
/* simulate multiple hosts by creating unique hostid file paths */
int sqlite3_hostid_num = 0;
#endif

#define PROXY_HOSTIDLEN    16  /* conch file host id length */

#ifdef HAVE_GETHOSTUUID
/* Not always defined in the headers as it ought to be */
extern int gethostuuid(uuid_t id, const struct timespec *wait);
#endif

/* get the host ID via gethostuuid(), pHostID must point to PROXY_HOSTIDLEN 
** bytes of writable memory.
*/
static int proxyGetHostID(unsigned char *pHostID, int *pError){
  assert(PROXY_HOSTIDLEN == sizeof(uuid_t));
  memset(pHostID, 0, PROXY_HOSTIDLEN);
#ifdef HAVE_GETHOSTUUID

  {
    struct timespec timeout = {1, 0}; /* 1 sec timeout */
    if( gethostuuid(pHostID, &timeout) ){
      int err = errno;
      if( pError ){
        *pError = err;
      }

Changes to src/pragma.c.

1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
          sqlite3VdbeAddOp2(v, OP_Null, 0, 5);
        }
        if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){
          k = 0;
        }else if( pPk==0 ){
          k = 1;
        }else{
          for(k=1; ALWAYS(k<=pTab->nCol) && pPk->aiColumn[k-1]!=i; k++){}
        }
        sqlite3VdbeAddOp2(v, OP_Integer, k, 6);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6);
      }
    }
  }
  break;







|







1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
          sqlite3VdbeAddOp2(v, OP_Null, 0, 5);
        }
        if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){
          k = 0;
        }else if( pPk==0 ){
          k = 1;
        }else{
          for(k=1; k<=pTab->nCol && pPk->aiColumn[k-1]!=i; k++){}
        }
        sqlite3VdbeAddOp2(v, OP_Integer, k, 6);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6);
      }
    }
  }
  break;

Changes to src/printf.c.

822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
}

/*
** Append N bytes of text from z to the StrAccum object.  Increase the
** size of the memory allocation for StrAccum if necessary.
*/
void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
  assert( z!=0 );
  assert( p->zText!=0 || p->nChar==0 || p->accError );
  assert( N>=0 );
  assert( p->accError==0 || p->nAlloc==0 );
  if( p->nChar+N >= p->nAlloc ){
    enlargeAndAppend(p,z,N);
  }else{
    assert( p->zText );







|







822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
}

/*
** Append N bytes of text from z to the StrAccum object.  Increase the
** size of the memory allocation for StrAccum if necessary.
*/
void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
  assert( z!=0 || N==0 );
  assert( p->zText!=0 || p->nChar==0 || p->accError );
  assert( N>=0 );
  assert( p->accError==0 || p->nAlloc==0 );
  if( p->nChar+N >= p->nAlloc ){
    enlargeAndAppend(p,z,N);
  }else{
    assert( p->zText );

Changes to src/resolve.c.

456
457
458
459
460
461
462

463
464
465
466
467
468
469
...
989
990
991
992
993
994
995

996

997
998
999
1000
1001
1002
1003
1004
1005
....
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
  **
  ** Because no reference was made to outer contexts, the pNC->nRef
  ** fields are not changed in any context.
  */
  if( cnt==0 && zTab==0 && ExprHasProperty(pExpr,EP_DblQuoted) ){
    pExpr->op = TK_STRING;
    pExpr->pTab = 0;

    return WRC_Prune;
  }

  /*
  ** cnt==0 means there was not match.  cnt>1 means there were two or
  ** more matches.  Either way, we have an error.
  */
................................................................................
        Expr *pNew = sqlite3Expr(db, TK_INTEGER, 0);
        if( pNew==0 ) return 1;
        pNew->flags |= EP_IntValue;
        pNew->u.iValue = iCol;
        if( pItem->pExpr==pE ){
          pItem->pExpr = pNew;
        }else{

          assert( pItem->pExpr->op==TK_COLLATE );

          assert( pItem->pExpr->pLeft==pE );
          pItem->pExpr->pLeft = pNew;
        }
        sqlite3ExprDelete(db, pE);
        pItem->u.x.iOrderByCol = (u16)iCol;
        pItem->done = 1;
      }else{
        moreToDo = 1;
      }
................................................................................
    ** was created by the convertCompoundSelectToSubquery() function.
    ** In this case the ORDER BY clause (p->pOrderBy) should be resolved
    ** as if it were part of the sub-query, not the parent. This block
    ** moves the pOrderBy down to the sub-query. It will be moved back
    ** after the names have been resolved.  */
    if( p->selFlags & SF_Converted ){
      Select *pSub = p->pSrc->a[0].pSelect;
      assert( p->pSrc->nSrc==1 && isCompound==0 && p->pOrderBy );
      assert( pSub->pPrior && pSub->pOrderBy==0 );
      pSub->pOrderBy = p->pOrderBy;
      p->pOrderBy = 0;
    }
  
    /* Recursively resolve names in all subqueries
    */







>







 







>
|
>
|
|







 







|







456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
...
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
....
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
  **
  ** Because no reference was made to outer contexts, the pNC->nRef
  ** fields are not changed in any context.
  */
  if( cnt==0 && zTab==0 && ExprHasProperty(pExpr,EP_DblQuoted) ){
    pExpr->op = TK_STRING;
    pExpr->pTab = 0;
    pExpr->iTable = -1;
    return WRC_Prune;
  }

  /*
  ** cnt==0 means there was not match.  cnt>1 means there were two or
  ** more matches.  Either way, we have an error.
  */
................................................................................
        Expr *pNew = sqlite3Expr(db, TK_INTEGER, 0);
        if( pNew==0 ) return 1;
        pNew->flags |= EP_IntValue;
        pNew->u.iValue = iCol;
        if( pItem->pExpr==pE ){
          pItem->pExpr = pNew;
        }else{
          Expr *pParent = pItem->pExpr;
          assert( pParent->op==TK_COLLATE );
          while( pParent->pLeft->op==TK_COLLATE ) pParent = pParent->pLeft;
          assert( pParent->pLeft==pE );
          pParent->pLeft = pNew;
        }
        sqlite3ExprDelete(db, pE);
        pItem->u.x.iOrderByCol = (u16)iCol;
        pItem->done = 1;
      }else{
        moreToDo = 1;
      }
................................................................................
    ** was created by the convertCompoundSelectToSubquery() function.
    ** In this case the ORDER BY clause (p->pOrderBy) should be resolved
    ** as if it were part of the sub-query, not the parent. This block
    ** moves the pOrderBy down to the sub-query. It will be moved back
    ** after the names have been resolved.  */
    if( p->selFlags & SF_Converted ){
      Select *pSub = p->pSrc->a[0].pSelect;
      assert( p->pSrc->nSrc==1 && p->pOrderBy );
      assert( pSub->pPrior && pSub->pOrderBy==0 );
      pSub->pOrderBy = p->pOrderBy;
      p->pOrderBy = 0;
    }
  
    /* Recursively resolve names in all subqueries
    */

Changes to src/select.c.

3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
....
3879
3880
3881
3882
3883
3884
3885

3886
3887
3888
3889
3890
3891
3892
  }
  p->pPrior = pPrior;
  pPrior->pNext = p;

  /*** TBD:  Insert subroutine calls to close cursors on incomplete
  **** subqueries ****/
  explainComposite(pParse, p->op, iSub1, iSub2, 0);
  return SQLITE_OK;
}
#endif

#if !defined(SQLITE_OMIT_SUBQUERY) || !defined(SQLITE_OMIT_VIEW)
/* Forward Declarations */
static void substExprList(sqlite3*, ExprList*, int, ExprList*);
static void substSelect(sqlite3*, Select *, int, ExprList *);
................................................................................
  p->op = TK_SELECT;
  p->pWhere = 0;
  pNew->pGroupBy = 0;
  pNew->pHaving = 0;
  pNew->pOrderBy = 0;
  p->pPrior = 0;
  p->pNext = 0;

  p->selFlags &= ~SF_Compound;
  assert( (p->selFlags & SF_Converted)==0 );
  p->selFlags |= SF_Converted;
  assert( pNew->pPrior!=0 );
  pNew->pPrior->pNext = pNew;
  pNew->pLimit = 0;
  pNew->pOffset = 0;







|







 







>







3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
....
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
  }
  p->pPrior = pPrior;
  pPrior->pNext = p;

  /*** TBD:  Insert subroutine calls to close cursors on incomplete
  **** subqueries ****/
  explainComposite(pParse, p->op, iSub1, iSub2, 0);
  return pParse->nErr!=0;
}
#endif

#if !defined(SQLITE_OMIT_SUBQUERY) || !defined(SQLITE_OMIT_VIEW)
/* Forward Declarations */
static void substExprList(sqlite3*, ExprList*, int, ExprList*);
static void substSelect(sqlite3*, Select *, int, ExprList *);
................................................................................
  p->op = TK_SELECT;
  p->pWhere = 0;
  pNew->pGroupBy = 0;
  pNew->pHaving = 0;
  pNew->pOrderBy = 0;
  p->pPrior = 0;
  p->pNext = 0;
  p->pWith = 0;
  p->selFlags &= ~SF_Compound;
  assert( (p->selFlags & SF_Converted)==0 );
  p->selFlags |= SF_Converted;
  assert( pNew->pPrior!=0 );
  pNew->pPrior->pNext = pNew;
  pNew->pLimit = 0;
  pNew->pOffset = 0;

Changes to src/sqlite.h.in.

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*/
#ifdef SQLITE_OMIT_FLOATING_POINT
# define double sqlite3_int64
#endif

/*
** CAPI3REF: Closing A Database Connection

**
** ^The sqlite3_close() and sqlite3_close_v2() routines are destructors
** for the [sqlite3] object.
** ^Calls to sqlite3_close() and sqlite3_close_v2() return [SQLITE_OK] if
** the [sqlite3] object is successfully destroyed and all associated
** resources are deallocated.
**
................................................................................
** This is legacy and deprecated.  It is included for historical
** compatibility and is not documented.
*/
typedef int (*sqlite3_callback)(void*,int,char**, char**);

/*
** CAPI3REF: One-Step Query Execution Interface

**
** The sqlite3_exec() interface is a convenience wrapper around
** [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()],
** that allows an application to run multiple statements of SQL
** without having to use a lot of C code. 
**
** ^The sqlite3_exec() interface runs zero or more UTF-8 encoded,
................................................................................
** ^If the option is unknown or SQLite is unable to set the option
** then this routine returns a non-zero [error code].
*/
int sqlite3_config(int, ...);

/*
** CAPI3REF: Configure database connections

**
** The sqlite3_db_config() interface is used to make configuration
** changes to a [database connection].  The interface is similar to
** [sqlite3_config()] except that the changes apply to a single
** [database connection] (specified in the first argument).
**
** The second argument to sqlite3_db_config(D,V,...)  is the
................................................................................
#define SQLITE_DBCONFIG_LOOKASIDE       1001  /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY     1002  /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER  1003  /* int int* */


/*
** CAPI3REF: Enable Or Disable Extended Result Codes

**
** ^The sqlite3_extended_result_codes() routine enables or disables the
** [extended result codes] feature of SQLite. ^The extended result
** codes are disabled by default for historical compatibility.
*/
int sqlite3_extended_result_codes(sqlite3*, int onoff);

/*
** CAPI3REF: Last Insert Rowid

**
** ^Each entry in most SQLite tables (except for [WITHOUT ROWID] tables)
** has a unique 64-bit signed
** integer key called the [ROWID | "rowid"]. ^The rowid is always available
** as an undeclared column named ROWID, OID, or _ROWID_ as long as those
** names are not also used by explicitly declared columns. ^If
** the table has a column of type [INTEGER PRIMARY KEY] then that column
................................................................................
** unpredictable and might not equal either the old or the new
** last insert [rowid].
*/
sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*);

/*
** CAPI3REF: Count The Number Of Rows Modified

**
** ^This function returns the number of rows modified, inserted or
** deleted by the most recently completed INSERT, UPDATE or DELETE
** statement on the database connection specified by the only parameter.
** ^Executing any other type of SQL statement does not modify the value
** returned by this function.
**
................................................................................
** while [sqlite3_changes()] is running then the value returned
** is unpredictable and not meaningful.
*/
int sqlite3_changes(sqlite3*);

/*
** CAPI3REF: Total Number Of Rows Modified

**
** ^This function returns the total number of rows inserted, modified or
** deleted by all [INSERT], [UPDATE] or [DELETE] statements completed
** since the database connection was opened, including those executed as
** part of trigger programs. ^Executing any other type of SQL statement
** does not affect the value returned by sqlite3_total_changes().
** 
................................................................................
** while [sqlite3_total_changes()] is running then the value
** returned is unpredictable and not meaningful.
*/
int sqlite3_total_changes(sqlite3*);

/*
** CAPI3REF: Interrupt A Long-Running Query

**
** ^This function causes any pending database operation to abort and
** return at its earliest opportunity. This routine is typically
** called in response to a user action such as pressing "Cancel"
** or Ctrl-C where the user wants a long query operation to halt
** immediately.
**
................................................................................
*/
int sqlite3_complete(const char *sql);
int sqlite3_complete16(const void *sql);

/*
** CAPI3REF: Register A Callback To Handle SQLITE_BUSY Errors
** KEYWORDS: {busy-handler callback} {busy handler}

**
** ^The sqlite3_busy_handler(D,X,P) routine sets a callback function X
** that might be invoked with argument P whenever
** an attempt is made to access a database table associated with
** [database connection] D when another thread
** or process has the table locked.
** The sqlite3_busy_handler() interface is used to implement
................................................................................
** A busy handler must not close the database connection
** or [prepared statement] that invoked the busy handler.
*/
int sqlite3_busy_handler(sqlite3*, int(*)(void*,int), void*);

/*
** CAPI3REF: Set A Busy Timeout

**
** ^This routine sets a [sqlite3_busy_handler | busy handler] that sleeps
** for a specified amount of time when a table is locked.  ^The handler
** will sleep multiple times until at least "ms" milliseconds of sleeping
** have accumulated.  ^After at least "ms" milliseconds of sleeping,
** the handler returns 0 which causes [sqlite3_step()] to return
** [SQLITE_BUSY].
................................................................................
**
** See also:  [PRAGMA busy_timeout]
*/
int sqlite3_busy_timeout(sqlite3*, int ms);

/*
** CAPI3REF: Convenience Routines For Running Queries

**
** This is a legacy interface that is preserved for backwards compatibility.
** Use of this interface is not recommended.
**
** Definition: A <b>result table</b> is memory data structure created by the
** [sqlite3_get_table()] interface.  A result table records the
** complete query results from one or more queries.
................................................................................
** internally and without recourse to the [sqlite3_vfs] xRandomness
** method.
*/
void sqlite3_randomness(int N, void *P);

/*
** CAPI3REF: Compile-Time Authorization Callbacks

**
** ^This routine registers an authorizer callback with a particular
** [database connection], supplied in the first argument.
** ^The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],
** [sqlite3_prepare16()] and [sqlite3_prepare16_v2()].  ^At various
** points during the compilation process, as logic is being created
................................................................................
#define SQLITE_FUNCTION             31   /* NULL            Function Name   */
#define SQLITE_SAVEPOINT            32   /* Operation       Savepoint Name  */
#define SQLITE_COPY                  0   /* No longer used */
#define SQLITE_RECURSIVE            33   /* NULL            NULL            */

/*
** CAPI3REF: Tracing And Profiling Functions

**
** These routines register callback functions that can be used for
** tracing and profiling the execution of SQL statements.
**
** ^The callback function registered by sqlite3_trace() is invoked at
** various times when an SQL statement is being run by [sqlite3_step()].
** ^The sqlite3_trace() callback is invoked with a UTF-8 rendering of the
................................................................................
*/
void *sqlite3_trace(sqlite3*, void(*xTrace)(void*,const char*), void*);
SQLITE_EXPERIMENTAL void *sqlite3_profile(sqlite3*,
   void(*xProfile)(void*,const char*,sqlite3_uint64), void*);

/*
** CAPI3REF: Query Progress Callbacks

**
** ^The sqlite3_progress_handler(D,N,X,P) interface causes the callback
** function X to be invoked periodically during long running calls to
** [sqlite3_exec()], [sqlite3_step()] and [sqlite3_get_table()] for
** database connection D.  An example use for this
** interface is to keep a GUI updated during a large query.
**
................................................................................
** database connections for the meaning of "modify" in this paragraph.
**
*/
void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*);

/*
** CAPI3REF: Opening A New Database Connection

**
** ^These routines open an SQLite database file as specified by the 
** filename argument. ^The filename argument is interpreted as UTF-8 for
** sqlite3_open() and sqlite3_open_v2() and as UTF-16 in the native byte
** order for sqlite3_open16(). ^(A [database connection] handle is usually
** returned in *ppDb, even if an error occurs.  The only exception is that
** if SQLite is unable to allocate memory to hold the [sqlite3] object,
................................................................................
const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam);
int sqlite3_uri_boolean(const char *zFile, const char *zParam, int bDefault);
sqlite3_int64 sqlite3_uri_int64(const char*, const char*, sqlite3_int64);


/*
** CAPI3REF: Error Codes And Messages

**
** ^If the most recent sqlite3_* API call associated with 
** [database connection] D failed, then the sqlite3_errcode(D) interface
** returns the numeric [result code] or [extended result code] for that
** API call.
** If the most recent API call was successful,
** then the return value from sqlite3_errcode() is undefined.
................................................................................
int sqlite3_errcode(sqlite3 *db);
int sqlite3_extended_errcode(sqlite3 *db);
const char *sqlite3_errmsg(sqlite3*);
const void *sqlite3_errmsg16(sqlite3*);
const char *sqlite3_errstr(int);

/*
** CAPI3REF: SQL Statement Object
** KEYWORDS: {prepared statement} {prepared statements}
**
** An instance of this object represents a single SQL statement.
** This object is variously known as a "prepared statement" or a
** "compiled SQL statement" or simply as a "statement".
**

** The life of a statement object goes something like this:


**


** <ol>
** <li> Create the object using [sqlite3_prepare_v2()] or a related
**      function.
** <li> Bind values to [host parameters] using the sqlite3_bind_*()
**      interfaces.
** <li> Run the SQL by calling [sqlite3_step()] one or more times.
** <li> Reset the statement using [sqlite3_reset()] then go back
**      to step 2.  Do this zero or more times.
** <li> Destroy the object using [sqlite3_finalize()].
** </ol>
**
** Refer to documentation on individual methods above for additional
** information.
*/
typedef struct sqlite3_stmt sqlite3_stmt;

/*
** CAPI3REF: Run-time Limits

**
** ^(This interface allows the size of various constructs to be limited
** on a connection by connection basis.  The first parameter is the
** [database connection] whose limit is to be set or queried.  The
** second parameter is one of the [limit categories] that define a
** class of constructs to be size limited.  The third parameter is the
** new limit for that construct.)^
................................................................................
#define SQLITE_LIMIT_VARIABLE_NUMBER           9
#define SQLITE_LIMIT_TRIGGER_DEPTH            10
#define SQLITE_LIMIT_WORKER_THREADS           11

/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}


**
** To execute an SQL query, it must first be compiled into a byte-code
** program using one of these routines.
**
** The first argument, "db", is a [database connection] obtained from a
** prior successful call to [sqlite3_open()], [sqlite3_open_v2()] or
** [sqlite3_open16()].  The database connection must not have been closed.
................................................................................
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);

/*
** CAPI3REF: Retrieving Statement SQL

**
** ^This interface can be used to retrieve a saved copy of the original
** SQL text used to create a [prepared statement] if that statement was
** compiled using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()].
*/
const char *sqlite3_sql(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Determine If An SQL Statement Writes The Database

**
** ^The sqlite3_stmt_readonly(X) interface returns true (non-zero) if
** and only if the [prepared statement] X makes no direct changes to
** the content of the database file.
**
** Note that [application-defined SQL functions] or
** [virtual tables] might change the database indirectly as a side effect.  
................................................................................
** change the configuration of a database connection, they do not make 
** changes to the content of the database files on disk.
*/
int sqlite3_stmt_readonly(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Determine If A Prepared Statement Has Been Reset

**
** ^The sqlite3_stmt_busy(S) interface returns true (non-zero) if the
** [prepared statement] S has been stepped at least once using 
** [sqlite3_step(S)] but has not run to completion and/or has not 
** been reset using [sqlite3_reset(S)].  ^The sqlite3_stmt_busy(S)
** interface returns false if S is a NULL pointer.  If S is not a 
** NULL pointer and is not a pointer to a valid [prepared statement]
................................................................................
*/
typedef struct sqlite3_context sqlite3_context;

/*
** CAPI3REF: Binding Values To Prepared Statements
** KEYWORDS: {host parameter} {host parameters} {host parameter name}
** KEYWORDS: {SQL parameter} {SQL parameters} {parameter binding}

**
** ^(In the SQL statement text input to [sqlite3_prepare_v2()] and its variants,
** literals may be replaced by a [parameter] that matches one of following
** templates:
**
** <ul>
** <li>  ?
................................................................................
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_zeroblob(sqlite3_stmt*, int, int n);

/*
** CAPI3REF: Number Of SQL Parameters

**
** ^This routine can be used to find the number of [SQL parameters]
** in a [prepared statement].  SQL parameters are tokens of the
** form "?", "?NNN", ":AAA", "$AAA", or "@AAA" that serve as
** placeholders for values that are [sqlite3_bind_blob | bound]
** to the parameters at a later time.
**
................................................................................
** [sqlite3_bind_parameter_name()], and
** [sqlite3_bind_parameter_index()].
*/
int sqlite3_bind_parameter_count(sqlite3_stmt*);

/*
** CAPI3REF: Name Of A Host Parameter

**
** ^The sqlite3_bind_parameter_name(P,N) interface returns
** the name of the N-th [SQL parameter] in the [prepared statement] P.
** ^(SQL parameters of the form "?NNN" or ":AAA" or "@AAA" or "$AAA"
** have a name which is the string "?NNN" or ":AAA" or "@AAA" or "$AAA"
** respectively.
** In other words, the initial ":" or "$" or "@" or "?"
................................................................................
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);

/*
** CAPI3REF: Index Of A Parameter With A Given Name

**
** ^Return the index of an SQL parameter given its name.  ^The
** index value returned is suitable for use as the second
** parameter to [sqlite3_bind_blob|sqlite3_bind()].  ^A zero
** is returned if no matching parameter is found.  ^The parameter
** name must be given in UTF-8 even if the original statement
** was prepared from UTF-16 text using [sqlite3_prepare16_v2()].
................................................................................
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);

/*
** CAPI3REF: Reset All Bindings On A Prepared Statement

**
** ^Contrary to the intuition of many, [sqlite3_reset()] does not reset
** the [sqlite3_bind_blob | bindings] on a [prepared statement].
** ^Use this routine to reset all host parameters to NULL.
*/
int sqlite3_clear_bindings(sqlite3_stmt*);

/*
** CAPI3REF: Number Of Columns In A Result Set

**
** ^Return the number of columns in the result set returned by the
** [prepared statement]. ^This routine returns 0 if pStmt is an SQL
** statement that does not return data (for example an [UPDATE]).
**
** See also: [sqlite3_data_count()]
*/
int sqlite3_column_count(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Column Names In A Result Set

**
** ^These routines return the name assigned to a particular column
** in the result set of a [SELECT] statement.  ^The sqlite3_column_name()
** interface returns a pointer to a zero-terminated UTF-8 string
** and sqlite3_column_name16() returns a pointer to a zero-terminated
** UTF-16 string.  ^The first parameter is the [prepared statement]
** that implements the [SELECT] statement. ^The second parameter is the
................................................................................
** one release of SQLite to the next.
*/
const char *sqlite3_column_name(sqlite3_stmt*, int N);
const void *sqlite3_column_name16(sqlite3_stmt*, int N);

/*
** CAPI3REF: Source Of Data In A Query Result

**
** ^These routines provide a means to determine the database, table, and
** table column that is the origin of a particular result column in
** [SELECT] statement.
** ^The name of the database or table or column can be returned as
** either a UTF-8 or UTF-16 string.  ^The _database_ routines return
** the database name, the _table_ routines return the table name, and
................................................................................
const char *sqlite3_column_table_name(sqlite3_stmt*,int);
const void *sqlite3_column_table_name16(sqlite3_stmt*,int);
const char *sqlite3_column_origin_name(sqlite3_stmt*,int);
const void *sqlite3_column_origin_name16(sqlite3_stmt*,int);

/*
** CAPI3REF: Declared Datatype Of A Query Result

**
** ^(The first parameter is a [prepared statement].
** If this statement is a [SELECT] statement and the Nth column of the
** returned result set of that [SELECT] is a table column (not an
** expression or subquery) then the declared type of the table
** column is returned.)^  ^If the Nth column of the result set is an
** expression or subquery, then a NULL pointer is returned.
................................................................................
** used to hold those values.
*/
const char *sqlite3_column_decltype(sqlite3_stmt*,int);
const void *sqlite3_column_decltype16(sqlite3_stmt*,int);

/*
** CAPI3REF: Evaluate An SQL Statement

**
** After a [prepared statement] has been prepared using either
** [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] or one of the legacy
** interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], this function
** must be called one or more times to evaluate the statement.
**
** The details of the behavior of the sqlite3_step() interface depend
................................................................................
** then the more specific [error codes] are returned directly
** by sqlite3_step().  The use of the "v2" interface is recommended.
*/
int sqlite3_step(sqlite3_stmt*);

/*
** CAPI3REF: Number of columns in a result set

**
** ^The sqlite3_data_count(P) interface returns the number of columns in the
** current row of the result set of [prepared statement] P.
** ^If prepared statement P does not have results ready to return
** (via calls to the [sqlite3_column_int | sqlite3_column_*()] of
** interfaces) then sqlite3_data_count(P) returns 0.
** ^The sqlite3_data_count(P) routine also returns 0 if P is a NULL pointer.
................................................................................
# define SQLITE_TEXT     3
#endif
#define SQLITE3_TEXT     3

/*
** CAPI3REF: Result Values From A Query
** KEYWORDS: {column access functions}

**
** These routines form the "result set" interface.
**
** ^These routines return information about a single column of the current
** result row of a query.  ^In every case the first argument is a pointer
** to the [prepared statement] that is being evaluated (the [sqlite3_stmt*]
** that was returned from [sqlite3_prepare_v2()] or one of its variants)
................................................................................
const unsigned char *sqlite3_column_text(sqlite3_stmt*, int iCol);
const void *sqlite3_column_text16(sqlite3_stmt*, int iCol);
int sqlite3_column_type(sqlite3_stmt*, int iCol);
sqlite3_value *sqlite3_column_value(sqlite3_stmt*, int iCol);

/*
** CAPI3REF: Destroy A Prepared Statement Object

**
** ^The sqlite3_finalize() function is called to delete a [prepared statement].
** ^If the most recent evaluation of the statement encountered no errors
** or if the statement is never been evaluated, then sqlite3_finalize() returns
** SQLITE_OK.  ^If the most recent evaluation of statement S failed, then
** sqlite3_finalize(S) returns the appropriate [error code] or
** [extended error code].
................................................................................
** statement after it has been finalized can result in undefined and
** undesirable behavior such as segfaults and heap corruption.
*/
int sqlite3_finalize(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Reset A Prepared Statement Object

**
** The sqlite3_reset() function is called to reset a [prepared statement]
** object back to its initial state, ready to be re-executed.
** ^Any SQL statement variables that had values bound to them using
** the [sqlite3_bind_blob | sqlite3_bind_*() API] retain their values.
** Use [sqlite3_clear_bindings()] to reset the bindings.
**
................................................................................
int sqlite3_reset(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Create Or Redefine SQL Functions
** KEYWORDS: {function creation routines}
** KEYWORDS: {application-defined SQL function}
** KEYWORDS: {application-defined SQL functions}

**
** ^These functions (collectively known as "function creation routines")
** are used to add SQL functions or aggregates or to redefine the behavior
** of existing SQL functions or aggregates.  The only differences between
** these routines are the text encoding expected for
** the second parameter (the name of the function being created)
** and the presence or absence of a destructor callback for
................................................................................
SQLITE_DEPRECATED void sqlite3_thread_cleanup(void);
SQLITE_DEPRECATED int sqlite3_memory_alarm(void(*)(void*,sqlite3_int64,int),
                      void*,sqlite3_int64);
#endif

/*
** CAPI3REF: Obtaining SQL Function Parameter Values

**
** The C-language implementation of SQL functions and aggregates uses
** this set of interface routines to access the parameter values on
** the function or aggregate.
**
** The xFunc (for scalar functions) or xStep (for aggregates) parameters
** to [sqlite3_create_function()] and [sqlite3_create_function16()]
................................................................................
const void *sqlite3_value_text16le(sqlite3_value*);
const void *sqlite3_value_text16be(sqlite3_value*);
int sqlite3_value_type(sqlite3_value*);
int sqlite3_value_numeric_type(sqlite3_value*);

/*
** CAPI3REF: Obtain Aggregate Function Context

**
** Implementations of aggregate SQL functions use this
** routine to allocate memory for storing their state.
**
** ^The first time the sqlite3_aggregate_context(C,N) routine is called 
** for a particular aggregate function, SQLite
** allocates N of memory, zeroes out that memory, and returns a pointer
................................................................................
** This routine must be called from the same thread in which
** the aggregate SQL function is running.
*/
void *sqlite3_aggregate_context(sqlite3_context*, int nBytes);

/*
** CAPI3REF: User Data For Functions

**
** ^The sqlite3_user_data() interface returns a copy of
** the pointer that was the pUserData parameter (the 5th parameter)
** of the [sqlite3_create_function()]
** and [sqlite3_create_function16()] routines that originally
** registered the application defined function.
**
................................................................................
** This routine must be called from the same thread in which
** the application-defined function is running.
*/
void *sqlite3_user_data(sqlite3_context*);

/*
** CAPI3REF: Database Connection For Functions

**
** ^The sqlite3_context_db_handle() interface returns a copy of
** the pointer to the [database connection] (the 1st parameter)
** of the [sqlite3_create_function()]
** and [sqlite3_create_function16()] routines that originally
** registered the application defined function.
*/
sqlite3 *sqlite3_context_db_handle(sqlite3_context*);

/*
** CAPI3REF: Function Auxiliary Data

**
** These functions may be used by (non-aggregate) SQL functions to
** associate metadata with argument values. If the same value is passed to
** multiple invocations of the same SQL function during query execution, under
** some circumstances the associated metadata may be preserved.  An example
** of where this might be useful is in a regular-expression matching
** function. The compiled version of the regular expression can be stored as
................................................................................
*/
typedef void (*sqlite3_destructor_type)(void*);
#define SQLITE_STATIC      ((sqlite3_destructor_type)0)
#define SQLITE_TRANSIENT   ((sqlite3_destructor_type)-1)

/*
** CAPI3REF: Setting The Result Of An SQL Function

**
** These routines are used by the xFunc or xFinal callbacks that
** implement SQL functions and aggregates.  See
** [sqlite3_create_function()] and [sqlite3_create_function16()]
** for additional information.
**
** These functions work very much like the [parameter binding] family of
................................................................................
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_zeroblob(sqlite3_context*, int n);

/*
** CAPI3REF: Define New Collating Sequences

**
** ^These functions add, remove, or modify a [collation] associated
** with the [database connection] specified as the first argument.
**
** ^The name of the collation is a UTF-8 string
** for sqlite3_create_collation() and sqlite3_create_collation_v2()
** and a UTF-16 string in native byte order for sqlite3_create_collation16().
................................................................................
  int eTextRep, 
  void *pArg,
  int(*xCompare)(void*,int,const void*,int,const void*)
);

/*
** CAPI3REF: Collation Needed Callbacks

**
** ^To avoid having to register all collation sequences before a database
** can be used, a single callback function may be registered with the
** [database connection] to be invoked whenever an undefined collation
** sequence is required.
**
** ^If the function is registered using the sqlite3_collation_needed() API,
................................................................................
** or else the use of the [data_store_directory pragma] should be avoided.
*/
SQLITE_EXTERN char *sqlite3_data_directory;

/*
** CAPI3REF: Test For Auto-Commit Mode
** KEYWORDS: {autocommit mode}

**
** ^The sqlite3_get_autocommit() interface returns non-zero or
** zero if the given database connection is or is not in autocommit mode,
** respectively.  ^Autocommit mode is on by default.
** ^Autocommit mode is disabled by a [BEGIN] statement.
** ^Autocommit mode is re-enabled by a [COMMIT] or [ROLLBACK].
**
................................................................................
** connection while this routine is running, then the return value
** is undefined.
*/
int sqlite3_get_autocommit(sqlite3*);

/*
** CAPI3REF: Find The Database Handle Of A Prepared Statement

**
** ^The sqlite3_db_handle interface returns the [database connection] handle
** to which a [prepared statement] belongs.  ^The [database connection]
** returned by sqlite3_db_handle is the same [database connection]
** that was the first argument
** to the [sqlite3_prepare_v2()] call (or its variants) that was used to
** create the statement in the first place.
*/
sqlite3 *sqlite3_db_handle(sqlite3_stmt*);

/*
** CAPI3REF: Return The Filename For A Database Connection

**
** ^The sqlite3_db_filename(D,N) interface returns a pointer to a filename
** associated with database N of connection D.  ^The main database file
** has the name "main".  If there is no attached database N on the database
** connection D, or if database N is a temporary or in-memory database, then
** a NULL pointer is returned.
**
................................................................................
** will be an absolute pathname, even if the filename used
** to open the database originally was a URI or relative pathname.
*/
const char *sqlite3_db_filename(sqlite3 *db, const char *zDbName);

/*
** CAPI3REF: Determine if a database is read-only

**
** ^The sqlite3_db_readonly(D,N) interface returns 1 if the database N
** of connection D is read-only, 0 if it is read/write, or -1 if N is not
** the name of a database on connection D.
*/
int sqlite3_db_readonly(sqlite3 *db, const char *zDbName);

/*
** CAPI3REF: Find the next prepared statement

**
** ^This interface returns a pointer to the next [prepared statement] after
** pStmt associated with the [database connection] pDb.  ^If pStmt is NULL
** then this interface returns a pointer to the first prepared statement
** associated with the database connection pDb.  ^If no prepared statement
** satisfies the conditions of this routine, it returns NULL.
**
................................................................................
** [sqlite3_next_stmt(D,S)] must refer to an open database
** connection and in particular must not be a NULL pointer.
*/
sqlite3_stmt *sqlite3_next_stmt(sqlite3 *pDb, sqlite3_stmt *pStmt);

/*
** CAPI3REF: Commit And Rollback Notification Callbacks

**
** ^The sqlite3_commit_hook() interface registers a callback
** function to be invoked whenever a transaction is [COMMIT | committed].
** ^Any callback set by a previous call to sqlite3_commit_hook()
** for the same database connection is overridden.
** ^The sqlite3_rollback_hook() interface registers a callback
** function to be invoked whenever a transaction is [ROLLBACK | rolled back].
................................................................................
** See also the [sqlite3_update_hook()] interface.
*/
void *sqlite3_commit_hook(sqlite3*, int(*)(void*), void*);
void *sqlite3_rollback_hook(sqlite3*, void(*)(void *), void*);

/*
** CAPI3REF: Data Change Notification Callbacks

**
** ^The sqlite3_update_hook() interface registers a callback function
** with the [database connection] identified by the first argument
** to be invoked whenever a row is updated, inserted or deleted in
** a rowid table.
** ^Any callback set by a previous call to this function
** for the same database connection is overridden.
................................................................................
**
** See also: [sqlite3_db_release_memory()]
*/
int sqlite3_release_memory(int);

/*
** CAPI3REF: Free Memory Used By A Database Connection

**
** ^The sqlite3_db_release_memory(D) interface attempts to free as much heap
** memory as possible from database connection D. Unlike the
** [sqlite3_release_memory()] interface, this interface is in effect even
** when the [SQLITE_ENABLE_MEMORY_MANAGEMENT] compile-time option is
** omitted.
**
................................................................................
** [sqlite3_soft_heap_limit64()] interface rather than this one.
*/
SQLITE_DEPRECATED void sqlite3_soft_heap_limit(int N);


/*
** CAPI3REF: Extract Metadata About A Column Of A Table

**
** ^(The sqlite3_table_column_metadata(X,D,T,C,....) routine returns
** information about column C of table T in database D
** on [database connection] X.)^  ^The sqlite3_table_column_metadata()
** interface returns SQLITE_OK and fills in the non-NULL pointers in
** the final five arguments with appropriate values if the specified
** column exists.  ^The sqlite3_table_column_metadata() interface returns
................................................................................
  int *pNotNull,              /* OUTPUT: True if NOT NULL constraint exists */
  int *pPrimaryKey,           /* OUTPUT: True if column part of PK */
  int *pAutoinc               /* OUTPUT: True if column is auto-increment */
);

/*
** CAPI3REF: Load An Extension

**
** ^This interface loads an SQLite extension library from the named file.
**
** ^The sqlite3_load_extension() interface attempts to load an
** [SQLite extension] library contained in the file zFile.  If
** the file cannot be loaded directly, attempts are made to load
** with various operating-system specific extensions added.
................................................................................
  const char *zFile,    /* Name of the shared library containing extension */
  const char *zProc,    /* Entry point.  Derived from zFile if 0 */
  char **pzErrMsg       /* Put error message here if not 0 */
);

/*
** CAPI3REF: Enable Or Disable Extension Loading

**
** ^So as not to open security holes in older applications that are
** unprepared to deal with [extension loading], and as a means of disabling
** [extension loading] while evaluating user-entered SQL, the following API
** is provided to turn the [sqlite3_load_extension()] mechanism on and off.
**
** ^Extension loading is off by default.
................................................................................
#define SQLITE_INDEX_CONSTRAINT_LE    8
#define SQLITE_INDEX_CONSTRAINT_LT    16
#define SQLITE_INDEX_CONSTRAINT_GE    32
#define SQLITE_INDEX_CONSTRAINT_MATCH 64

/*
** CAPI3REF: Register A Virtual Table Implementation

**
** ^These routines are used to register a new [virtual table module] name.
** ^Module names must be registered before
** creating a new [virtual table] using the module and before using a
** preexisting [virtual table] for the module.
**
** ^The module name is registered on the [database connection] specified
................................................................................
** to declare the format (the names and datatypes of the columns) of
** the virtual tables they implement.
*/
int sqlite3_declare_vtab(sqlite3*, const char *zSQL);

/*
** CAPI3REF: Overload A Function For A Virtual Table

**
** ^(Virtual tables can provide alternative implementations of functions
** using the [xFindFunction] method of the [virtual table module].  
** But global versions of those functions
** must exist in order to be overloaded.)^
**
** ^(This API makes sure a global version of a function with a particular
................................................................................
** can be used to read or write small subsections of the BLOB.
** ^The [sqlite3_blob_bytes()] interface returns the size of the BLOB in bytes.
*/
typedef struct sqlite3_blob sqlite3_blob;

/*
** CAPI3REF: Open A BLOB For Incremental I/O


**
** ^(This interfaces opens a [BLOB handle | handle] to the BLOB located
** in row iRow, column zColumn, table zTable in database zDb;
** in other words, the same BLOB that would be selected by:
**
** <pre>
**     SELECT zColumn FROM zDb.zTable WHERE [rowid] = iRow;
................................................................................
  sqlite3_int64 iRow,
  int flags,
  sqlite3_blob **ppBlob
);

/*
** CAPI3REF: Move a BLOB Handle to a New Row

**
** ^This function is used to move an existing blob handle so that it points
** to a different row of the same database table. ^The new row is identified
** by the rowid value passed as the second argument. Only the row can be
** changed. ^The database, table and column on which the blob handle is open
** remain the same. Moving an existing blob handle to a new row can be
** faster than closing the existing handle and opening a new one.
................................................................................
**
** ^This function sets the database handle error code and message.
*/
SQLITE_EXPERIMENTAL int sqlite3_blob_reopen(sqlite3_blob *, sqlite3_int64);

/*
** CAPI3REF: Close A BLOB Handle

**
** ^This function closes an open [BLOB handle]. ^(The BLOB handle is closed
** unconditionally.  Even if this routine returns an error code, the 
** handle is still closed.)^
**
** ^If the blob handle being closed was opened for read-write access, and if
** the database is in auto-commit mode and there are no other open read-write
................................................................................
** is passed a valid open blob handle, the values returned by the 
** sqlite3_errcode() and sqlite3_errmsg() functions are set before returning.
*/
int sqlite3_blob_close(sqlite3_blob *);

/*
** CAPI3REF: Return The Size Of An Open BLOB

**
** ^Returns the size in bytes of the BLOB accessible via the 
** successfully opened [BLOB handle] in its only argument.  ^The
** incremental blob I/O routines can only read or overwriting existing
** blob content; they cannot change the size of a blob.
**
** This routine only works on a [BLOB handle] which has been created
................................................................................
** been closed by [sqlite3_blob_close()].  Passing any other pointer in
** to this routine results in undefined and probably undesirable behavior.
*/
int sqlite3_blob_bytes(sqlite3_blob *);

/*
** CAPI3REF: Read Data From A BLOB Incrementally

**
** ^(This function is used to read data from an open [BLOB handle] into a
** caller-supplied buffer. N bytes of data are copied into buffer Z
** from the open BLOB, starting at offset iOffset.)^
**
** ^If offset iOffset is less than N bytes from the end of the BLOB,
** [SQLITE_ERROR] is returned and no data is read.  ^If N or iOffset is
................................................................................
**
** See also: [sqlite3_blob_write()].
*/
int sqlite3_blob_read(sqlite3_blob *, void *Z, int N, int iOffset);

/*
** CAPI3REF: Write Data Into A BLOB Incrementally

**
** ^(This function is used to write data into an open [BLOB handle] from a
** caller-supplied buffer. N bytes of data are copied from the buffer Z
** into the open BLOB, starting at offset iOffset.)^
**
** ^(On success, sqlite3_blob_write() returns SQLITE_OK.
** Otherwise, an  [error code] or an [extended error code] is returned.)^
................................................................................
#define SQLITE_MUTEX_STATIC_PMEM      7  /* sqlite3PageMalloc() */
#define SQLITE_MUTEX_STATIC_APP1      8  /* For use by application */
#define SQLITE_MUTEX_STATIC_APP2      9  /* For use by application */
#define SQLITE_MUTEX_STATIC_APP3     10  /* For use by application */

/*
** CAPI3REF: Retrieve the mutex for a database connection

**
** ^This interface returns a pointer the [sqlite3_mutex] object that 
** serializes access to the [database connection] given in the argument
** when the [threading mode] is Serialized.
** ^If the [threading mode] is Single-thread or Multi-thread then this
** routine returns a NULL pointer.
*/
sqlite3_mutex *sqlite3_db_mutex(sqlite3*);

/*
** CAPI3REF: Low-Level Control Of Database Files

**
** ^The [sqlite3_file_control()] interface makes a direct call to the
** xFileControl method for the [sqlite3_io_methods] object associated
** with a particular database identified by the second argument. ^The
** name of the database is "main" for the main database or "temp" for the
** TEMP database, or the name that appears after the AS keyword for
** databases that are added using the [ATTACH] SQL command.
................................................................................
#define SQLITE_STATUS_PARSER_STACK         6
#define SQLITE_STATUS_PAGECACHE_SIZE       7
#define SQLITE_STATUS_SCRATCH_SIZE         8
#define SQLITE_STATUS_MALLOC_COUNT         9

/*
** CAPI3REF: Database Connection Status

**
** ^This interface is used to retrieve runtime status information 
** about a single [database connection].  ^The first argument is the
** database connection object to be interrogated.  ^The second argument
** is an integer constant, taken from the set of
** [SQLITE_DBSTATUS options], that
** determines the parameter to interrogate.  The set of 
................................................................................
#define SQLITE_DBSTATUS_CACHE_WRITE          9
#define SQLITE_DBSTATUS_DEFERRED_FKS        10
#define SQLITE_DBSTATUS_MAX                 10   /* Largest defined DBSTATUS */


/*
** CAPI3REF: Prepared Statement Status

**
** ^(Each prepared statement maintains various
** [SQLITE_STMTSTATUS counters] that measure the number
** of times it has performed specific operations.)^  These counters can
** be used to monitor the performance characteristics of the prepared
** statements.  For example, if the number of table steps greatly exceeds
** the number of table searches or result rows, that would tend to indicate
................................................................................
int sqlite3_backup_step(sqlite3_backup *p, int nPage);
int sqlite3_backup_finish(sqlite3_backup *p);
int sqlite3_backup_remaining(sqlite3_backup *p);
int sqlite3_backup_pagecount(sqlite3_backup *p);

/*
** CAPI3REF: Unlock Notification

**
** ^When running in shared-cache mode, a database operation may fail with
** an [SQLITE_LOCKED] error if the required locks on the shared-cache or
** individual tables within the shared-cache cannot be obtained. See
** [SQLite Shared-Cache Mode] for a description of shared-cache locking. 
** ^This API may be used to register a callback that SQLite will invoke 
** when the connection currently holding the required lock relinquishes it.
................................................................................
** a few hundred characters, it will be truncated to the length of the
** buffer.
*/
void sqlite3_log(int iErrCode, const char *zFormat, ...);

/*
** CAPI3REF: Write-Ahead Log Commit Hook

**
** ^The [sqlite3_wal_hook()] function is used to register a callback that
** is invoked each time data is committed to a database in wal mode.
**
** ^(The callback is invoked by SQLite after the commit has taken place and 
** the associated write-lock on the database released)^, so the implementation 
** may read, write or [checkpoint] the database as required.
................................................................................
  sqlite3*, 
  int(*)(void *,sqlite3*,const char*,int),
  void*
);

/*
** CAPI3REF: Configure an auto-checkpoint

**
** ^The [sqlite3_wal_autocheckpoint(D,N)] is a wrapper around
** [sqlite3_wal_hook()] that causes any database on [database connection] D
** to automatically [checkpoint]
** after committing a transaction if there are N or
** more frames in the [write-ahead log] file.  ^Passing zero or 
** a negative value as the nFrame parameter disables automatic
................................................................................
** is only necessary if the default setting is found to be suboptimal
** for a particular application.
*/
int sqlite3_wal_autocheckpoint(sqlite3 *db, int N);

/*
** CAPI3REF: Checkpoint a database

**
** ^(The sqlite3_wal_checkpoint(D,X) is equivalent to
** [sqlite3_wal_checkpoint_v2](D,X,[SQLITE_CHECKPOINT_PASSIVE],0,0).)^
**
** In brief, sqlite3_wal_checkpoint(D,X) causes the content in the 
** [write-ahead log] for database X on [database connection] D to be
** transferred into the database file and for the write-ahead log to
................................................................................
** start a callback but which do not need the full power (and corresponding
** complication) of [sqlite3_wal_checkpoint_v2()].
*/
int sqlite3_wal_checkpoint(sqlite3 *db, const char *zDb);

/*
** CAPI3REF: Checkpoint a database

**
** ^(The sqlite3_wal_checkpoint_v2(D,X,M,L,C) interface runs a checkpoint
** operation on database X of [database connection] D in mode M.  Status
** information is written back into integers pointed to by L and C.)^
** ^(The M parameter must be a valid [checkpoint mode]:)^
**
** <dl>
................................................................................
#define SQLITE_SCANSTAT_EST      2
#define SQLITE_SCANSTAT_NAME     3
#define SQLITE_SCANSTAT_EXPLAIN  4
#define SQLITE_SCANSTAT_SELECTID 5

/*
** CAPI3REF: Prepared Statement Scan Status

**
** This interface returns information about the predicted and measured
** performance for pStmt.  Advanced applications can use this
** interface to compare the predicted and the measured performance and
** issue warnings and/or rerun [ANALYZE] if discrepancies are found.
**
** Since this interface is expected to be rarely used, it is only
................................................................................
  int idx,                  /* Index of loop to report on */
  int iScanStatusOp,        /* Information desired.  SQLITE_SCANSTAT_* */
  void *pOut                /* Result written here */
);     

/*
** CAPI3REF: Zero Scan-Status Counters

**
** ^Zero all [sqlite3_stmt_scanstatus()] related event counters.
**
** This API is only available if the library is built with pre-processor
** symbol [SQLITE_ENABLE_STMT_SCANSTATUS] defined.
*/
SQLITE_EXPERIMENTAL void sqlite3_stmt_scanstatus_reset(sqlite3_stmt*);







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*/
#ifdef SQLITE_OMIT_FLOATING_POINT
# define double sqlite3_int64
#endif

/*
** CAPI3REF: Closing A Database Connection
** DESTRUCTOR: sqlite3
**
** ^The sqlite3_close() and sqlite3_close_v2() routines are destructors
** for the [sqlite3] object.
** ^Calls to sqlite3_close() and sqlite3_close_v2() return [SQLITE_OK] if
** the [sqlite3] object is successfully destroyed and all associated
** resources are deallocated.
**
................................................................................
** This is legacy and deprecated.  It is included for historical
** compatibility and is not documented.
*/
typedef int (*sqlite3_callback)(void*,int,char**, char**);

/*
** CAPI3REF: One-Step Query Execution Interface
** METHOD: sqlite3
**
** The sqlite3_exec() interface is a convenience wrapper around
** [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()],
** that allows an application to run multiple statements of SQL
** without having to use a lot of C code. 
**
** ^The sqlite3_exec() interface runs zero or more UTF-8 encoded,
................................................................................
** ^If the option is unknown or SQLite is unable to set the option
** then this routine returns a non-zero [error code].
*/
int sqlite3_config(int, ...);

/*
** CAPI3REF: Configure database connections
** METHOD: sqlite3
**
** The sqlite3_db_config() interface is used to make configuration
** changes to a [database connection].  The interface is similar to
** [sqlite3_config()] except that the changes apply to a single
** [database connection] (specified in the first argument).
**
** The second argument to sqlite3_db_config(D,V,...)  is the
................................................................................
#define SQLITE_DBCONFIG_LOOKASIDE       1001  /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY     1002  /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER  1003  /* int int* */


/*
** 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
** codes are disabled by default for historical compatibility.
*/
int sqlite3_extended_result_codes(sqlite3*, int onoff);

/*
** CAPI3REF: Last Insert Rowid
** METHOD: sqlite3
**
** ^Each entry in most SQLite tables (except for [WITHOUT ROWID] tables)
** has a unique 64-bit signed
** integer key called the [ROWID | "rowid"]. ^The rowid is always available
** as an undeclared column named ROWID, OID, or _ROWID_ as long as those
** names are not also used by explicitly declared columns. ^If
** the table has a column of type [INTEGER PRIMARY KEY] then that column
................................................................................
** unpredictable and might not equal either the old or the new
** last insert [rowid].
*/
sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*);

/*
** CAPI3REF: Count The Number Of Rows Modified
** METHOD: sqlite3
**
** ^This function returns the number of rows modified, inserted or
** deleted by the most recently completed INSERT, UPDATE or DELETE
** statement on the database connection specified by the only parameter.
** ^Executing any other type of SQL statement does not modify the value
** returned by this function.
**
................................................................................
** while [sqlite3_changes()] is running then the value returned
** is unpredictable and not meaningful.
*/
int sqlite3_changes(sqlite3*);

/*
** CAPI3REF: Total Number Of Rows Modified
** METHOD: sqlite3
**
** ^This function returns the total number of rows inserted, modified or
** deleted by all [INSERT], [UPDATE] or [DELETE] statements completed
** since the database connection was opened, including those executed as
** part of trigger programs. ^Executing any other type of SQL statement
** does not affect the value returned by sqlite3_total_changes().
** 
................................................................................
** while [sqlite3_total_changes()] is running then the value
** returned is unpredictable and not meaningful.
*/
int sqlite3_total_changes(sqlite3*);

/*
** CAPI3REF: Interrupt A Long-Running Query
** METHOD: sqlite3
**
** ^This function causes any pending database operation to abort and
** return at its earliest opportunity. This routine is typically
** called in response to a user action such as pressing "Cancel"
** or Ctrl-C where the user wants a long query operation to halt
** immediately.
**
................................................................................
*/
int sqlite3_complete(const char *sql);
int sqlite3_complete16(const void *sql);

/*
** CAPI3REF: Register A Callback To Handle SQLITE_BUSY Errors
** KEYWORDS: {busy-handler callback} {busy handler}
** METHOD: sqlite3
**
** ^The sqlite3_busy_handler(D,X,P) routine sets a callback function X
** that might be invoked with argument P whenever
** an attempt is made to access a database table associated with
** [database connection] D when another thread
** or process has the table locked.
** The sqlite3_busy_handler() interface is used to implement
................................................................................
** A busy handler must not close the database connection
** or [prepared statement] that invoked the busy handler.
*/
int sqlite3_busy_handler(sqlite3*, int(*)(void*,int), void*);

/*
** CAPI3REF: Set A Busy Timeout
** METHOD: sqlite3
**
** ^This routine sets a [sqlite3_busy_handler | busy handler] that sleeps
** for a specified amount of time when a table is locked.  ^The handler
** will sleep multiple times until at least "ms" milliseconds of sleeping
** have accumulated.  ^After at least "ms" milliseconds of sleeping,
** the handler returns 0 which causes [sqlite3_step()] to return
** [SQLITE_BUSY].
................................................................................
**
** See also:  [PRAGMA busy_timeout]
*/
int sqlite3_busy_timeout(sqlite3*, int ms);

/*
** CAPI3REF: Convenience Routines For Running Queries
** METHOD: sqlite3
**
** This is a legacy interface that is preserved for backwards compatibility.
** Use of this interface is not recommended.
**
** Definition: A <b>result table</b> is memory data structure created by the
** [sqlite3_get_table()] interface.  A result table records the
** complete query results from one or more queries.
................................................................................
** internally and without recourse to the [sqlite3_vfs] xRandomness
** method.
*/
void sqlite3_randomness(int N, void *P);

/*
** CAPI3REF: Compile-Time Authorization Callbacks
** METHOD: sqlite3
**
** ^This routine registers an authorizer callback with a particular
** [database connection], supplied in the first argument.
** ^The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],
** [sqlite3_prepare16()] and [sqlite3_prepare16_v2()].  ^At various
** points during the compilation process, as logic is being created
................................................................................
#define SQLITE_FUNCTION             31   /* NULL            Function Name   */
#define SQLITE_SAVEPOINT            32   /* Operation       Savepoint Name  */
#define SQLITE_COPY                  0   /* No longer used */
#define SQLITE_RECURSIVE            33   /* NULL            NULL            */

/*
** CAPI3REF: Tracing And Profiling Functions
** METHOD: sqlite3
**
** These routines register callback functions that can be used for
** tracing and profiling the execution of SQL statements.
**
** ^The callback function registered by sqlite3_trace() is invoked at
** various times when an SQL statement is being run by [sqlite3_step()].
** ^The sqlite3_trace() callback is invoked with a UTF-8 rendering of the
................................................................................
*/
void *sqlite3_trace(sqlite3*, void(*xTrace)(void*,const char*), void*);
SQLITE_EXPERIMENTAL void *sqlite3_profile(sqlite3*,
   void(*xProfile)(void*,const char*,sqlite3_uint64), void*);

/*
** CAPI3REF: Query Progress Callbacks
** METHOD: sqlite3
**
** ^The sqlite3_progress_handler(D,N,X,P) interface causes the callback
** function X to be invoked periodically during long running calls to
** [sqlite3_exec()], [sqlite3_step()] and [sqlite3_get_table()] for
** database connection D.  An example use for this
** interface is to keep a GUI updated during a large query.
**
................................................................................
** database connections for the meaning of "modify" in this paragraph.
**
*/
void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*);

/*
** CAPI3REF: Opening A New Database Connection
** CONSTRUCTOR: sqlite3
**
** ^These routines open an SQLite database file as specified by the 
** filename argument. ^The filename argument is interpreted as UTF-8 for
** sqlite3_open() and sqlite3_open_v2() and as UTF-16 in the native byte
** order for sqlite3_open16(). ^(A [database connection] handle is usually
** returned in *ppDb, even if an error occurs.  The only exception is that
** if SQLite is unable to allocate memory to hold the [sqlite3] object,
................................................................................
const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam);
int sqlite3_uri_boolean(const char *zFile, const char *zParam, int bDefault);
sqlite3_int64 sqlite3_uri_int64(const char*, const char*, sqlite3_int64);


/*
** CAPI3REF: Error Codes And Messages
** METHOD: sqlite3
**
** ^If the most recent sqlite3_* API call associated with 
** [database connection] D failed, then the sqlite3_errcode(D) interface
** returns the numeric [result code] or [extended result code] for that
** API call.
** If the most recent API call was successful,
** then the return value from sqlite3_errcode() is undefined.
................................................................................
int sqlite3_errcode(sqlite3 *db);
int sqlite3_extended_errcode(sqlite3 *db);
const char *sqlite3_errmsg(sqlite3*);
const void *sqlite3_errmsg16(sqlite3*);
const char *sqlite3_errstr(int);

/*
** CAPI3REF: Prepared Statement Object
** KEYWORDS: {prepared statement} {prepared statements}
**
** An instance of this object represents a single SQL statement that
** has been compiled into binary form and is ready to be evaluated.

**
** Think of each SQL statement as a separate computer program.  The
** original SQL text is source code.  A prepared statement object 
** is the compiled object code.  All SQL must be converted into a
** prepared statement before it can be run.
**
** The life-cycle of a prepared statement object usually goes like this:
**
** <ol>
** <li> Create the prepared statement object using [sqlite3_prepare_v2()].

** <li> Bind values to [parameters] using the sqlite3_bind_*()
**      interfaces.
** <li> Run the SQL by calling [sqlite3_step()] one or more times.
** <li> Reset the prepared statement using [sqlite3_reset()] then go back
**      to step 2.  Do this zero or more times.
** <li> Destroy the object using [sqlite3_finalize()].
** </ol>



*/
typedef struct sqlite3_stmt sqlite3_stmt;

/*
** CAPI3REF: Run-time Limits
** METHOD: sqlite3
**
** ^(This interface allows the size of various constructs to be limited
** on a connection by connection basis.  The first parameter is the
** [database connection] whose limit is to be set or queried.  The
** second parameter is one of the [limit categories] that define a
** class of constructs to be size limited.  The third parameter is the
** new limit for that construct.)^
................................................................................
#define SQLITE_LIMIT_VARIABLE_NUMBER           9
#define SQLITE_LIMIT_TRIGGER_DEPTH            10
#define SQLITE_LIMIT_WORKER_THREADS           11

/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_stmt
**
** To execute an SQL query, it must first be compiled into a byte-code
** program using one of these routines.
**
** The first argument, "db", is a [database connection] obtained from a
** prior successful call to [sqlite3_open()], [sqlite3_open_v2()] or
** [sqlite3_open16()].  The database connection must not have been closed.
................................................................................
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);

/*
** CAPI3REF: Retrieving Statement SQL
** METHOD: sqlite3_stmt
**
** ^This interface can be used to retrieve a saved copy of the original
** SQL text used to create a [prepared statement] if that statement was
** compiled using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()].
*/
const char *sqlite3_sql(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Determine If An SQL Statement Writes The Database
** METHOD: sqlite3_stmt
**
** ^The sqlite3_stmt_readonly(X) interface returns true (non-zero) if
** and only if the [prepared statement] X makes no direct changes to
** the content of the database file.
**
** Note that [application-defined SQL functions] or
** [virtual tables] might change the database indirectly as a side effect.  
................................................................................
** change the configuration of a database connection, they do not make 
** changes to the content of the database files on disk.
*/
int sqlite3_stmt_readonly(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Determine If A Prepared Statement Has Been Reset
** METHOD: sqlite3_stmt
**
** ^The sqlite3_stmt_busy(S) interface returns true (non-zero) if the
** [prepared statement] S has been stepped at least once using 
** [sqlite3_step(S)] but has not run to completion and/or has not 
** been reset using [sqlite3_reset(S)].  ^The sqlite3_stmt_busy(S)
** interface returns false if S is a NULL pointer.  If S is not a 
** NULL pointer and is not a pointer to a valid [prepared statement]
................................................................................
*/
typedef struct sqlite3_context sqlite3_context;

/*
** CAPI3REF: Binding Values To Prepared Statements
** KEYWORDS: {host parameter} {host parameters} {host parameter name}
** KEYWORDS: {SQL parameter} {SQL parameters} {parameter binding}
** METHOD: sqlite3_stmt
**
** ^(In the SQL statement text input to [sqlite3_prepare_v2()] and its variants,
** literals may be replaced by a [parameter] that matches one of following
** templates:
**
** <ul>
** <li>  ?
................................................................................
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_zeroblob(sqlite3_stmt*, int, int n);

/*
** CAPI3REF: Number Of SQL Parameters
** METHOD: sqlite3_stmt
**
** ^This routine can be used to find the number of [SQL parameters]
** in a [prepared statement].  SQL parameters are tokens of the
** form "?", "?NNN", ":AAA", "$AAA", or "@AAA" that serve as
** placeholders for values that are [sqlite3_bind_blob | bound]
** to the parameters at a later time.
**
................................................................................
** [sqlite3_bind_parameter_name()], and
** [sqlite3_bind_parameter_index()].
*/
int sqlite3_bind_parameter_count(sqlite3_stmt*);

/*
** CAPI3REF: Name Of A Host Parameter
** METHOD: sqlite3_stmt
**
** ^The sqlite3_bind_parameter_name(P,N) interface returns
** the name of the N-th [SQL parameter] in the [prepared statement] P.
** ^(SQL parameters of the form "?NNN" or ":AAA" or "@AAA" or "$AAA"
** have a name which is the string "?NNN" or ":AAA" or "@AAA" or "$AAA"
** respectively.
** In other words, the initial ":" or "$" or "@" or "?"
................................................................................
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);

/*
** CAPI3REF: Index Of A Parameter With A Given Name
** METHOD: sqlite3_stmt
**
** ^Return the index of an SQL parameter given its name.  ^The
** index value returned is suitable for use as the second
** parameter to [sqlite3_bind_blob|sqlite3_bind()].  ^A zero
** is returned if no matching parameter is found.  ^The parameter
** name must be given in UTF-8 even if the original statement
** was prepared from UTF-16 text using [sqlite3_prepare16_v2()].
................................................................................
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);

/*
** CAPI3REF: Reset All Bindings On A Prepared Statement
** METHOD: sqlite3_stmt
**
** ^Contrary to the intuition of many, [sqlite3_reset()] does not reset
** the [sqlite3_bind_blob | bindings] on a [prepared statement].
** ^Use this routine to reset all host parameters to NULL.
*/
int sqlite3_clear_bindings(sqlite3_stmt*);

/*
** CAPI3REF: Number Of Columns In A Result Set
** METHOD: sqlite3_stmt
**
** ^Return the number of columns in the result set returned by the
** [prepared statement]. ^This routine returns 0 if pStmt is an SQL
** statement that does not return data (for example an [UPDATE]).
**
** See also: [sqlite3_data_count()]
*/
int sqlite3_column_count(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Column Names In A Result Set
** METHOD: sqlite3_stmt
**
** ^These routines return the name assigned to a particular column
** in the result set of a [SELECT] statement.  ^The sqlite3_column_name()
** interface returns a pointer to a zero-terminated UTF-8 string
** and sqlite3_column_name16() returns a pointer to a zero-terminated
** UTF-16 string.  ^The first parameter is the [prepared statement]
** that implements the [SELECT] statement. ^The second parameter is the
................................................................................
** one release of SQLite to the next.
*/
const char *sqlite3_column_name(sqlite3_stmt*, int N);
const void *sqlite3_column_name16(sqlite3_stmt*, int N);

/*
** CAPI3REF: Source Of Data In A Query Result
** METHOD: sqlite3_stmt
**
** ^These routines provide a means to determine the database, table, and
** table column that is the origin of a particular result column in
** [SELECT] statement.
** ^The name of the database or table or column can be returned as
** either a UTF-8 or UTF-16 string.  ^The _database_ routines return
** the database name, the _table_ routines return the table name, and
................................................................................
const char *sqlite3_column_table_name(sqlite3_stmt*,int);
const void *sqlite3_column_table_name16(sqlite3_stmt*,int);
const char *sqlite3_column_origin_name(sqlite3_stmt*,int);
const void *sqlite3_column_origin_name16(sqlite3_stmt*,int);

/*
** CAPI3REF: Declared Datatype Of A Query Result
** METHOD: sqlite3_stmt
**
** ^(The first parameter is a [prepared statement].
** If this statement is a [SELECT] statement and the Nth column of the
** returned result set of that [SELECT] is a table column (not an
** expression or subquery) then the declared type of the table
** column is returned.)^  ^If the Nth column of the result set is an
** expression or subquery, then a NULL pointer is returned.
................................................................................
** used to hold those values.
*/
const char *sqlite3_column_decltype(sqlite3_stmt*,int);
const void *sqlite3_column_decltype16(sqlite3_stmt*,int);

/*
** CAPI3REF: Evaluate An SQL Statement
** METHOD: sqlite3_stmt
**
** After a [prepared statement] has been prepared using either
** [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] or one of the legacy
** interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], this function
** must be called one or more times to evaluate the statement.
**
** The details of the behavior of the sqlite3_step() interface depend
................................................................................
** then the more specific [error codes] are returned directly
** by sqlite3_step().  The use of the "v2" interface is recommended.
*/
int sqlite3_step(sqlite3_stmt*);

/*
** CAPI3REF: Number of columns in a result set
** METHOD: sqlite3_stmt
**
** ^The sqlite3_data_count(P) interface returns the number of columns in the
** current row of the result set of [prepared statement] P.
** ^If prepared statement P does not have results ready to return
** (via calls to the [sqlite3_column_int | sqlite3_column_*()] of
** interfaces) then sqlite3_data_count(P) returns 0.
** ^The sqlite3_data_count(P) routine also returns 0 if P is a NULL pointer.
................................................................................
# define SQLITE_TEXT     3
#endif
#define SQLITE3_TEXT     3

/*
** CAPI3REF: Result Values From A Query
** KEYWORDS: {column access functions}
** METHOD: sqlite3_stmt
**
** These routines form the "result set" interface.
**
** ^These routines return information about a single column of the current
** result row of a query.  ^In every case the first argument is a pointer
** to the [prepared statement] that is being evaluated (the [sqlite3_stmt*]
** that was returned from [sqlite3_prepare_v2()] or one of its variants)
................................................................................
const unsigned char *sqlite3_column_text(sqlite3_stmt*, int iCol);
const void *sqlite3_column_text16(sqlite3_stmt*, int iCol);
int sqlite3_column_type(sqlite3_stmt*, int iCol);
sqlite3_value *sqlite3_column_value(sqlite3_stmt*, int iCol);

/*
** CAPI3REF: Destroy A Prepared Statement Object
** DESTRUCTOR: sqlite3_stmt
**
** ^The sqlite3_finalize() function is called to delete a [prepared statement].
** ^If the most recent evaluation of the statement encountered no errors
** or if the statement is never been evaluated, then sqlite3_finalize() returns
** SQLITE_OK.  ^If the most recent evaluation of statement S failed, then
** sqlite3_finalize(S) returns the appropriate [error code] or
** [extended error code].
................................................................................
** statement after it has been finalized can result in undefined and
** undesirable behavior such as segfaults and heap corruption.
*/
int sqlite3_finalize(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Reset A Prepared Statement Object
** METHOD: sqlite3_stmt
**
** The sqlite3_reset() function is called to reset a [prepared statement]
** object back to its initial state, ready to be re-executed.
** ^Any SQL statement variables that had values bound to them using
** the [sqlite3_bind_blob | sqlite3_bind_*() API] retain their values.
** Use [sqlite3_clear_bindings()] to reset the bindings.
**
................................................................................
int sqlite3_reset(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Create Or Redefine SQL Functions
** KEYWORDS: {function creation routines}
** KEYWORDS: {application-defined SQL function}
** KEYWORDS: {application-defined SQL functions}
** METHOD: sqlite3
**
** ^These functions (collectively known as "function creation routines")
** are used to add SQL functions or aggregates or to redefine the behavior
** of existing SQL functions or aggregates.  The only differences between
** these routines are the text encoding expected for
** the second parameter (the name of the function being created)
** and the presence or absence of a destructor callback for
................................................................................
SQLITE_DEPRECATED void sqlite3_thread_cleanup(void);
SQLITE_DEPRECATED int sqlite3_memory_alarm(void(*)(void*,sqlite3_int64,int),
                      void*,sqlite3_int64);
#endif

/*
** CAPI3REF: Obtaining SQL Function Parameter Values
** METHOD: sqlite3_value
**
** The C-language implementation of SQL functions and aggregates uses
** this set of interface routines to access the parameter values on
** the function or aggregate.
**
** The xFunc (for scalar functions) or xStep (for aggregates) parameters
** to [sqlite3_create_function()] and [sqlite3_create_function16()]
................................................................................
const void *sqlite3_value_text16le(sqlite3_value*);
const void *sqlite3_value_text16be(sqlite3_value*);
int sqlite3_value_type(sqlite3_value*);
int sqlite3_value_numeric_type(sqlite3_value*);

/*
** CAPI3REF: Obtain Aggregate Function Context
** METHOD: sqlite3_context
**
** Implementations of aggregate SQL functions use this
** routine to allocate memory for storing their state.
**
** ^The first time the sqlite3_aggregate_context(C,N) routine is called 
** for a particular aggregate function, SQLite
** allocates N of memory, zeroes out that memory, and returns a pointer
................................................................................
** This routine must be called from the same thread in which
** the aggregate SQL function is running.
*/
void *sqlite3_aggregate_context(sqlite3_context*, int nBytes);

/*
** CAPI3REF: User Data For Functions
** METHOD: sqlite3_context
**
** ^The sqlite3_user_data() interface returns a copy of
** the pointer that was the pUserData parameter (the 5th parameter)
** of the [sqlite3_create_function()]
** and [sqlite3_create_function16()] routines that originally
** registered the application defined function.
**
................................................................................
** This routine must be called from the same thread in which
** the application-defined function is running.
*/
void *sqlite3_user_data(sqlite3_context*);

/*
** CAPI3REF: Database Connection For Functions
** METHOD: sqlite3_context
**
** ^The sqlite3_context_db_handle() interface returns a copy of
** the pointer to the [database connection] (the 1st parameter)
** of the [sqlite3_create_function()]
** and [sqlite3_create_function16()] routines that originally
** registered the application defined function.
*/
sqlite3 *sqlite3_context_db_handle(sqlite3_context*);

/*
** CAPI3REF: Function Auxiliary Data
** METHOD: sqlite3_context
**
** These functions may be used by (non-aggregate) SQL functions to
** associate metadata with argument values. If the same value is passed to
** multiple invocations of the same SQL function during query execution, under
** some circumstances the associated metadata may be preserved.  An example
** of where this might be useful is in a regular-expression matching
** function. The compiled version of the regular expression can be stored as
................................................................................
*/
typedef void (*sqlite3_destructor_type)(void*);
#define SQLITE_STATIC      ((sqlite3_destructor_type)0)
#define SQLITE_TRANSIENT   ((sqlite3_destructor_type)-1)

/*
** CAPI3REF: Setting The Result Of An SQL Function
** METHOD: sqlite3_context
**
** These routines are used by the xFunc or xFinal callbacks that
** implement SQL functions and aggregates.  See
** [sqlite3_create_function()] and [sqlite3_create_function16()]
** for additional information.
**
** These functions work very much like the [parameter binding] family of
................................................................................
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_zeroblob(sqlite3_context*, int n);

/*
** CAPI3REF: Define New Collating Sequences
** METHOD: sqlite3
**
** ^These functions add, remove, or modify a [collation] associated
** with the [database connection] specified as the first argument.
**
** ^The name of the collation is a UTF-8 string
** for sqlite3_create_collation() and sqlite3_create_collation_v2()
** and a UTF-16 string in native byte order for sqlite3_create_collation16().
................................................................................
  int eTextRep, 
  void *pArg,
  int(*xCompare)(void*,int,const void*,int,const void*)
);

/*
** CAPI3REF: Collation Needed Callbacks
** METHOD: sqlite3
**
** ^To avoid having to register all collation sequences before a database
** can be used, a single callback function may be registered with the
** [database connection] to be invoked whenever an undefined collation
** sequence is required.
**
** ^If the function is registered using the sqlite3_collation_needed() API,
................................................................................
** or else the use of the [data_store_directory pragma] should be avoided.
*/
SQLITE_EXTERN char *sqlite3_data_directory;

/*
** CAPI3REF: Test For Auto-Commit Mode
** KEYWORDS: {autocommit mode}
** METHOD: sqlite3
**
** ^The sqlite3_get_autocommit() interface returns non-zero or
** zero if the given database connection is or is not in autocommit mode,
** respectively.  ^Autocommit mode is on by default.
** ^Autocommit mode is disabled by a [BEGIN] statement.
** ^Autocommit mode is re-enabled by a [COMMIT] or [ROLLBACK].
**
................................................................................
** connection while this routine is running, then the return value
** is undefined.
*/
int sqlite3_get_autocommit(sqlite3*);

/*
** CAPI3REF: Find The Database Handle Of A Prepared Statement
** METHOD: sqlite3_stmt
**
** ^The sqlite3_db_handle interface returns the [database connection] handle
** to which a [prepared statement] belongs.  ^The [database connection]
** returned by sqlite3_db_handle is the same [database connection]
** that was the first argument
** to the [sqlite3_prepare_v2()] call (or its variants) that was used to
** create the statement in the first place.
*/
sqlite3 *sqlite3_db_handle(sqlite3_stmt*);

/*
** CAPI3REF: Return The Filename For A Database Connection
** METHOD: sqlite3
**
** ^The sqlite3_db_filename(D,N) interface returns a pointer to a filename
** associated with database N of connection D.  ^The main database file
** has the name "main".  If there is no attached database N on the database
** connection D, or if database N is a temporary or in-memory database, then
** a NULL pointer is returned.
**
................................................................................
** will be an absolute pathname, even if the filename used
** to open the database originally was a URI or relative pathname.
*/
const char *sqlite3_db_filename(sqlite3 *db, const char *zDbName);

/*
** CAPI3REF: Determine if a database is read-only
** METHOD: sqlite3
**
** ^The sqlite3_db_readonly(D,N) interface returns 1 if the database N
** of connection D is read-only, 0 if it is read/write, or -1 if N is not
** the name of a database on connection D.
*/
int sqlite3_db_readonly(sqlite3 *db, const char *zDbName);

/*
** CAPI3REF: Find the next prepared statement
** METHOD: sqlite3
**
** ^This interface returns a pointer to the next [prepared statement] after
** pStmt associated with the [database connection] pDb.  ^If pStmt is NULL
** then this interface returns a pointer to the first prepared statement
** associated with the database connection pDb.  ^If no prepared statement
** satisfies the conditions of this routine, it returns NULL.
**
................................................................................
** [sqlite3_next_stmt(D,S)] must refer to an open database
** connection and in particular must not be a NULL pointer.
*/
sqlite3_stmt *sqlite3_next_stmt(sqlite3 *pDb, sqlite3_stmt *pStmt);

/*
** CAPI3REF: Commit And Rollback Notification Callbacks
** METHOD: sqlite3
**
** ^The sqlite3_commit_hook() interface registers a callback
** function to be invoked whenever a transaction is [COMMIT | committed].
** ^Any callback set by a previous call to sqlite3_commit_hook()
** for the same database connection is overridden.
** ^The sqlite3_rollback_hook() interface registers a callback
** function to be invoked whenever a transaction is [ROLLBACK | rolled back].
................................................................................
** See also the [sqlite3_update_hook()] interface.
*/
void *sqlite3_commit_hook(sqlite3*, int(*)(void*), void*);
void *sqlite3_rollback_hook(sqlite3*, void(*)(void *), void*);

/*
** CAPI3REF: Data Change Notification Callbacks
** METHOD: sqlite3
**
** ^The sqlite3_update_hook() interface registers a callback function
** with the [database connection] identified by the first argument
** to be invoked whenever a row is updated, inserted or deleted in
** a rowid table.
** ^Any callback set by a previous call to this function
** for the same database connection is overridden.
................................................................................
**
** See also: [sqlite3_db_release_memory()]
*/
int sqlite3_release_memory(int);

/*
** CAPI3REF: Free Memory Used By A Database Connection
** METHOD: sqlite3
**
** ^The sqlite3_db_release_memory(D) interface attempts to free as much heap
** memory as possible from database connection D. Unlike the
** [sqlite3_release_memory()] interface, this interface is in effect even
** when the [SQLITE_ENABLE_MEMORY_MANAGEMENT] compile-time option is
** omitted.
**
................................................................................
** [sqlite3_soft_heap_limit64()] interface rather than this one.
*/
SQLITE_DEPRECATED void sqlite3_soft_heap_limit(int N);


/*
** CAPI3REF: Extract Metadata About A Column Of A Table
** METHOD: sqlite3
**
** ^(The sqlite3_table_column_metadata(X,D,T,C,....) routine returns
** information about column C of table T in database D
** on [database connection] X.)^  ^The sqlite3_table_column_metadata()
** interface returns SQLITE_OK and fills in the non-NULL pointers in
** the final five arguments with appropriate values if the specified
** column exists.  ^The sqlite3_table_column_metadata() interface returns
................................................................................
  int *pNotNull,              /* OUTPUT: True if NOT NULL constraint exists */
  int *pPrimaryKey,           /* OUTPUT: True if column part of PK */
  int *pAutoinc               /* OUTPUT: True if column is auto-increment */
);

/*
** CAPI3REF: Load An Extension
** METHOD: sqlite3
**
** ^This interface loads an SQLite extension library from the named file.
**
** ^The sqlite3_load_extension() interface attempts to load an
** [SQLite extension] library contained in the file zFile.  If
** the file cannot be loaded directly, attempts are made to load
** with various operating-system specific extensions added.
................................................................................
  const char *zFile,    /* Name of the shared library containing extension */
  const char *zProc,    /* Entry point.  Derived from zFile if 0 */
  char **pzErrMsg       /* Put error message here if not 0 */
);

/*
** CAPI3REF: Enable Or Disable Extension Loading
** METHOD: sqlite3
**
** ^So as not to open security holes in older applications that are
** unprepared to deal with [extension loading], and as a means of disabling
** [extension loading] while evaluating user-entered SQL, the following API
** is provided to turn the [sqlite3_load_extension()] mechanism on and off.
**
** ^Extension loading is off by default.
................................................................................
#define SQLITE_INDEX_CONSTRAINT_LE    8
#define SQLITE_INDEX_CONSTRAINT_LT    16
#define SQLITE_INDEX_CONSTRAINT_GE    32
#define SQLITE_INDEX_CONSTRAINT_MATCH 64

/*
** CAPI3REF: Register A Virtual Table Implementation
** METHOD: sqlite3
**
** ^These routines are used to register a new [virtual table module] name.
** ^Module names must be registered before
** creating a new [virtual table] using the module and before using a
** preexisting [virtual table] for the module.
**
** ^The module name is registered on the [database connection] specified
................................................................................
** to declare the format (the names and datatypes of the columns) of
** the virtual tables they implement.
*/
int sqlite3_declare_vtab(sqlite3*, const char *zSQL);

/*
** CAPI3REF: Overload A Function For A Virtual Table
** METHOD: sqlite3
**
** ^(Virtual tables can provide alternative implementations of functions
** using the [xFindFunction] method of the [virtual table module].  
** But global versions of those functions
** must exist in order to be overloaded.)^
**
** ^(This API makes sure a global version of a function with a particular
................................................................................
** can be used to read or write small subsections of the BLOB.
** ^The [sqlite3_blob_bytes()] interface returns the size of the BLOB in bytes.
*/
typedef struct sqlite3_blob sqlite3_blob;

/*
** CAPI3REF: Open A BLOB For Incremental I/O
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_blob
**
** ^(This interfaces opens a [BLOB handle | handle] to the BLOB located
** in row iRow, column zColumn, table zTable in database zDb;
** in other words, the same BLOB that would be selected by:
**
** <pre>
**     SELECT zColumn FROM zDb.zTable WHERE [rowid] = iRow;
................................................................................
  sqlite3_int64 iRow,
  int flags,
  sqlite3_blob **ppBlob
);

/*
** CAPI3REF: Move a BLOB Handle to a New Row
** METHOD: sqlite3_blob
**
** ^This function is used to move an existing blob handle so that it points
** to a different row of the same database table. ^The new row is identified
** by the rowid value passed as the second argument. Only the row can be
** changed. ^The database, table and column on which the blob handle is open
** remain the same. Moving an existing blob handle to a new row can be
** faster than closing the existing handle and opening a new one.
................................................................................
**
** ^This function sets the database handle error code and message.
*/
SQLITE_EXPERIMENTAL int sqlite3_blob_reopen(sqlite3_blob *, sqlite3_int64);

/*
** CAPI3REF: Close A BLOB Handle
** DESTRUCTOR: sqlite3_blob
**
** ^This function closes an open [BLOB handle]. ^(The BLOB handle is closed
** unconditionally.  Even if this routine returns an error code, the 
** handle is still closed.)^
**
** ^If the blob handle being closed was opened for read-write access, and if
** the database is in auto-commit mode and there are no other open read-write
................................................................................
** is passed a valid open blob handle, the values returned by the 
** sqlite3_errcode() and sqlite3_errmsg() functions are set before returning.
*/
int sqlite3_blob_close(sqlite3_blob *);

/*
** CAPI3REF: Return The Size Of An Open BLOB
** METHOD: sqlite3_blob
**
** ^Returns the size in bytes of the BLOB accessible via the 
** successfully opened [BLOB handle] in its only argument.  ^The
** incremental blob I/O routines can only read or overwriting existing
** blob content; they cannot change the size of a blob.
**
** This routine only works on a [BLOB handle] which has been created
................................................................................
** been closed by [sqlite3_blob_close()].  Passing any other pointer in
** to this routine results in undefined and probably undesirable behavior.
*/
int sqlite3_blob_bytes(sqlite3_blob *);

/*
** CAPI3REF: Read Data From A BLOB Incrementally
** METHOD: sqlite3_blob
**
** ^(This function is used to read data from an open [BLOB handle] into a
** caller-supplied buffer. N bytes of data are copied into buffer Z
** from the open BLOB, starting at offset iOffset.)^
**
** ^If offset iOffset is less than N bytes from the end of the BLOB,
** [SQLITE_ERROR] is returned and no data is read.  ^If N or iOffset is
................................................................................
**
** See also: [sqlite3_blob_write()].
*/
int sqlite3_blob_read(sqlite3_blob *, void *Z, int N, int iOffset);

/*
** CAPI3REF: Write Data Into A BLOB Incrementally
** METHOD: sqlite3_blob
**
** ^(This function is used to write data into an open [BLOB handle] from a
** caller-supplied buffer. N bytes of data are copied from the buffer Z
** into the open BLOB, starting at offset iOffset.)^
**
** ^(On success, sqlite3_blob_write() returns SQLITE_OK.
** Otherwise, an  [error code] or an [extended error code] is returned.)^
................................................................................
#define SQLITE_MUTEX_STATIC_PMEM      7  /* sqlite3PageMalloc() */
#define SQLITE_MUTEX_STATIC_APP1      8  /* For use by application */
#define SQLITE_MUTEX_STATIC_APP2      9  /* For use by application */
#define SQLITE_MUTEX_STATIC_APP3     10  /* For use by application */

/*
** CAPI3REF: Retrieve the mutex for a database connection
** METHOD: sqlite3
**
** ^This interface returns a pointer the [sqlite3_mutex] object that 
** serializes access to the [database connection] given in the argument
** when the [threading mode] is Serialized.
** ^If the [threading mode] is Single-thread or Multi-thread then this
** routine returns a NULL pointer.
*/
sqlite3_mutex *sqlite3_db_mutex(sqlite3*);

/*
** CAPI3REF: Low-Level Control Of Database Files
** METHOD: sqlite3
**
** ^The [sqlite3_file_control()] interface makes a direct call to the
** xFileControl method for the [sqlite3_io_methods] object associated
** with a particular database identified by the second argument. ^The
** name of the database is "main" for the main database or "temp" for the
** TEMP database, or the name that appears after the AS keyword for
** databases that are added using the [ATTACH] SQL command.
................................................................................
#define SQLITE_STATUS_PARSER_STACK         6
#define SQLITE_STATUS_PAGECACHE_SIZE       7
#define SQLITE_STATUS_SCRATCH_SIZE         8
#define SQLITE_STATUS_MALLOC_COUNT         9

/*
** CAPI3REF: Database Connection Status
** METHOD: sqlite3
**
** ^This interface is used to retrieve runtime status information 
** about a single [database connection].  ^The first argument is the
** database connection object to be interrogated.  ^The second argument
** is an integer constant, taken from the set of
** [SQLITE_DBSTATUS options], that
** determines the parameter to interrogate.  The set of 
................................................................................
#define SQLITE_DBSTATUS_CACHE_WRITE          9
#define SQLITE_DBSTATUS_DEFERRED_FKS        10
#define SQLITE_DBSTATUS_MAX                 10   /* Largest defined DBSTATUS */


/*
** CAPI3REF: Prepared Statement Status
** METHOD: sqlite3_stmt
**
** ^(Each prepared statement maintains various
** [SQLITE_STMTSTATUS counters] that measure the number
** of times it has performed specific operations.)^  These counters can
** be used to monitor the performance characteristics of the prepared
** statements.  For example, if the number of table steps greatly exceeds
** the number of table searches or result rows, that would tend to indicate
................................................................................
int sqlite3_backup_step(sqlite3_backup *p, int nPage);
int sqlite3_backup_finish(sqlite3_backup *p);
int sqlite3_backup_remaining(sqlite3_backup *p);
int sqlite3_backup_pagecount(sqlite3_backup *p);

/*
** CAPI3REF: Unlock Notification
** METHOD: sqlite3
**
** ^When running in shared-cache mode, a database operation may fail with
** an [SQLITE_LOCKED] error if the required locks on the shared-cache or
** individual tables within the shared-cache cannot be obtained. See
** [SQLite Shared-Cache Mode] for a description of shared-cache locking. 
** ^This API may be used to register a callback that SQLite will invoke 
** when the connection currently holding the required lock relinquishes it.
................................................................................
** a few hundred characters, it will be truncated to the length of the
** buffer.
*/
void sqlite3_log(int iErrCode, const char *zFormat, ...);

/*
** CAPI3REF: Write-Ahead Log Commit Hook
** METHOD: sqlite3
**
** ^The [sqlite3_wal_hook()] function is used to register a callback that
** is invoked each time data is committed to a database in wal mode.
**
** ^(The callback is invoked by SQLite after the commit has taken place and 
** the associated write-lock on the database released)^, so the implementation 
** may read, write or [checkpoint] the database as required.
................................................................................
  sqlite3*, 
  int(*)(void *,sqlite3*,const char*,int),
  void*
);

/*
** CAPI3REF: Configure an auto-checkpoint
** METHOD: sqlite3
**
** ^The [sqlite3_wal_autocheckpoint(D,N)] is a wrapper around
** [sqlite3_wal_hook()] that causes any database on [database connection] D
** to automatically [checkpoint]
** after committing a transaction if there are N or
** more frames in the [write-ahead log] file.  ^Passing zero or 
** a negative value as the nFrame parameter disables automatic
................................................................................
** is only necessary if the default setting is found to be suboptimal
** for a particular application.
*/
int sqlite3_wal_autocheckpoint(sqlite3 *db, int N);

/*
** CAPI3REF: Checkpoint a database
** METHOD: sqlite3
**
** ^(The sqlite3_wal_checkpoint(D,X) is equivalent to
** [sqlite3_wal_checkpoint_v2](D,X,[SQLITE_CHECKPOINT_PASSIVE],0,0).)^
**
** In brief, sqlite3_wal_checkpoint(D,X) causes the content in the 
** [write-ahead log] for database X on [database connection] D to be
** transferred into the database file and for the write-ahead log to
................................................................................
** start a callback but which do not need the full power (and corresponding
** complication) of [sqlite3_wal_checkpoint_v2()].
*/
int sqlite3_wal_checkpoint(sqlite3 *db, const char *zDb);

/*
** CAPI3REF: Checkpoint a database
** METHOD: sqlite3
**
** ^(The sqlite3_wal_checkpoint_v2(D,X,M,L,C) interface runs a checkpoint
** operation on database X of [database connection] D in mode M.  Status
** information is written back into integers pointed to by L and C.)^
** ^(The M parameter must be a valid [checkpoint mode]:)^
**
** <dl>
................................................................................
#define SQLITE_SCANSTAT_EST      2
#define SQLITE_SCANSTAT_NAME     3
#define SQLITE_SCANSTAT_EXPLAIN  4
#define SQLITE_SCANSTAT_SELECTID 5

/*
** CAPI3REF: Prepared Statement Scan Status
** METHOD: sqlite3_stmt
**
** This interface returns information about the predicted and measured
** performance for pStmt.  Advanced applications can use this
** interface to compare the predicted and the measured performance and
** issue warnings and/or rerun [ANALYZE] if discrepancies are found.
**
** Since this interface is expected to be rarely used, it is only
................................................................................
  int idx,                  /* Index of loop to report on */
  int iScanStatusOp,        /* Information desired.  SQLITE_SCANSTAT_* */
  void *pOut                /* Result written here */
);     

/*
** CAPI3REF: Zero Scan-Status Counters
** METHOD: sqlite3_stmt
**
** ^Zero all [sqlite3_stmt_scanstatus()] related event counters.
**
** This API is only available if the library is built with pre-processor
** symbol [SQLITE_ENABLE_STMT_SCANSTATUS] defined.
*/
SQLITE_EXPERIMENTAL void sqlite3_stmt_scanstatus_reset(sqlite3_stmt*);

Changes to src/tokenize.c.

426
427
428
429
430
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432
433
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435
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437
438
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443
...
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453

454
455
456
457
458
459
460
461
          sqlite3ErrorMsg(pParse, "interrupt");
          pParse->rc = SQLITE_INTERRUPT;
          goto abort_parse;
        }
        break;
      }
      case TK_ILLEGAL: {
        sqlite3DbFree(db, *pzErrMsg);
        *pzErrMsg = sqlite3MPrintf(db, "unrecognized token: \"%T\"",
                        &pParse->sLastToken);
        nErr++;
        goto abort_parse;
      }
      case TK_SEMI: {
        pParse->zTail = &zSql[i];
        /* Fall thru into the default case */
      }
      default: {
................................................................................
          goto abort_parse;
        }
        break;
      }
    }
  }
abort_parse:

  if( zSql[i]==0 && nErr==0 && pParse->rc==SQLITE_OK ){
    if( lastTokenParsed!=TK_SEMI ){
      sqlite3Parser(pEngine, TK_SEMI, pParse->sLastToken, pParse);
      pParse->zTail = &zSql[i];
    }
    sqlite3Parser(pEngine, 0, pParse->sLastToken, pParse);
  }
#ifdef YYTRACKMAXSTACKDEPTH







<
|

<







 







>
|







426
427
428
429
430
431
432

433
434

435
436
437
438
439
440
441
...
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
          sqlite3ErrorMsg(pParse, "interrupt");
          pParse->rc = SQLITE_INTERRUPT;
          goto abort_parse;
        }
        break;
      }
      case TK_ILLEGAL: {

        sqlite3ErrorMsg(pParse, "unrecognized token: \"%T\"",
                        &pParse->sLastToken);

        goto abort_parse;
      }
      case TK_SEMI: {
        pParse->zTail = &zSql[i];
        /* Fall thru into the default case */
      }
      default: {
................................................................................
          goto abort_parse;
        }
        break;
      }
    }
  }
abort_parse:
  assert( nErr==0 );
  if( zSql[i]==0 && pParse->rc==SQLITE_OK ){
    if( lastTokenParsed!=TK_SEMI ){
      sqlite3Parser(pEngine, TK_SEMI, pParse->sLastToken, pParse);
      pParse->zTail = &zSql[i];
    }
    sqlite3Parser(pEngine, 0, pParse->sLastToken, pParse);
  }
#ifdef YYTRACKMAXSTACKDEPTH

Changes to src/vdbe.c.

520
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522
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526















527
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663
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793
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795
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836
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842
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919
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926

927
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945
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...
966
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984
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993
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1000
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1002
1003

1004
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1017
1018
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1020
1021
1022
1023
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1025
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1034
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1038
1039
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1063
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1072
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....
1092
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1102
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1161
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....
1957
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1964
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2069
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2087
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2183
2184
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2197
....
2218
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2256
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2259
2260
....
2727
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2742
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2981
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3044
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3058
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3123
3124
3125
3126
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3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143

3144
3145
3146
3147
3148
3149
3150
....
3458
3459
3460
3461
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3467
3468
3469
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3472
....
3635
3636
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3638
3639
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3645
3646
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3649
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3726
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3734
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3739
3740
....
3820
3821
3822
3823
3824
3825
3826

3827
3828
3829
3830
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3832
3833
....
3842
3843
3844
3845
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3847
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3849
3850
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3852
3853
3854
3855
3856
....
3865
3866
3867
3868
3869
3870
3871

3872
3873
3874
3875
3876
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3893
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3895
3896
3897
3898
3899
3900
3901
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3903
3904
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3906
3907
....
3942
3943
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3953
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3957
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3959
3960
3961
3962
3963
3964
3965
3966

3967
3968
3969
3970
3971
3972
3973
....
3980
3981
3982
3983
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3990
3991
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3995
3996

3997
3998
3999
4000
4001
4002
4003
....
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
....
4484
4485
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4487
4488
4489
4490
4491
4492
4493
4494
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4496

4497
4498
4499
4500
4501
4502
4503
....
4575
4576
4577
4578
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4583
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4586
4587
4588
4589
....
4639
4640
4641
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4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
....
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763

4764
4765
4766
4767
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4769
4770
....
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
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4875

4876
4877
4878
4879
4880
4881
4882
....
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
....
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018

5019
5020
5021
5022
5023
5024
5025
....
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132

5133
5134
5135
5136
5137
5138
5139
....
5351
5352
5353
5354
5355
5356
5357
5358
5359

5360
5361
5362
5363

5364
5365
5366
5367
5368
5369
5370
....
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
....
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
....
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
....
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
....
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570

5571
5572
5573
5574
5575
5576
5577
....
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
....
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
....
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
....
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
....
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
....
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
....
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
....
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885

5886
5887
5888
5889
5890
5891
5892
....
5995
5996
5997
5998
5999
6000
6001
6002
6003

6004
6005
6006
6007
6008
6009
6010
....
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224

6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
....
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
....
6434
6435
6436
6437
6438
6439
6440
6441

6442
6443
6444
6445
6446
6447
6448
....
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460

6461
6462
6463
6464
6465
6466
6467
....
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
....
6512
6513
6514
6515
6516
6517
6518

6519
6520
6521
6522
6523
6524
6525
....
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
....
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
  Savepoint *p;
  for(p=db->pSavepoint; p; p=p->pNext) n++;
  assert( n==(db->nSavepoint + db->isTransactionSavepoint) );
  return 1;
}
#endif

















/*
** Execute as much of a VDBE program as we can.
** This is the core of sqlite3_step().  
*/
int sqlite3VdbeExec(
  Vdbe *p                    /* The VDBE */
){
  int pc=0;                  /* The program counter */
  Op *aOp = p->aOp;          /* Copy of p->aOp */
  Op *pOp;                   /* Current operation */
  int rc = SQLITE_OK;        /* Value to return */
  sqlite3 *db = p->db;       /* The database */
  u8 resetSchemaOnFault = 0; /* Reset schema after an error if positive */
  u8 encoding = ENC(db);     /* The database encoding */
  int iCompare = 0;          /* Result of last OP_Compare operation */
  unsigned nVmStep = 0;      /* Number of virtual machine steps */
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
................................................................................
        }
      }
    }
    if( p->db->flags & SQLITE_VdbeTrace )  printf("VDBE Trace:\n");
  }
  sqlite3EndBenignMalloc();
#endif
  for(pc=p->pc; rc==SQLITE_OK; pc++){
    assert( pc>=0 && pc<p->nOp );
    if( db->mallocFailed ) goto no_mem;
#ifdef VDBE_PROFILE
    start = sqlite3Hwtime();
#endif
    nVmStep++;
    pOp = &aOp[pc];
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
    if( p->anExec ) p->anExec[pc]++;
#endif

    /* Only allow tracing if SQLITE_DEBUG is defined.
    */
#ifdef SQLITE_DEBUG
    if( db->flags & SQLITE_VdbeTrace ){
      sqlite3VdbePrintOp(stdout, pc, pOp);
    }
#endif
      

    /* Check to see if we need to simulate an interrupt.  This only happens
    ** if we have a special test build.
    */
................................................................................
      sqlite3_interrupt_count--;
      if( sqlite3_interrupt_count==0 ){
        sqlite3_interrupt(db);
      }
    }
#endif

    /* On any opcode with the "out2-prerelease" tag, free any
    ** external allocations out of mem[p2] and set mem[p2] to be
    ** an undefined integer.  Opcodes will either fill in the integer
    ** value or convert mem[p2] to a different type.
    */
    assert( pOp->opflags==sqlite3OpcodeProperty[pOp->opcode] );
    if( pOp->opflags & OPFLG_OUT2_PRERELEASE ){
      assert( pOp->p2>0 );
      assert( pOp->p2<=(p->nMem-p->nCursor) );
      pOut = &aMem[pOp->p2];
      memAboutToChange(p, pOut);
      if( VdbeMemDynamic(pOut) ) sqlite3VdbeMemSetNull(pOut);
      pOut->flags = MEM_Int;
    }

    /* Sanity checking on other operands */
#ifdef SQLITE_DEBUG

    if( (pOp->opflags & OPFLG_IN1)!=0 ){
      assert( pOp->p1>0 );
      assert( pOp->p1<=(p->nMem-p->nCursor) );
      assert( memIsValid(&aMem[pOp->p1]) );
      assert( sqlite3VdbeCheckMemInvariants(&aMem[pOp->p1]) );
      REGISTER_TRACE(pOp->p1, &aMem[pOp->p1]);
    }
................................................................................
** opcode and the opcodes.c file is filled with an array of strings where
** each string is the symbolic name for the corresponding opcode.  If the
** case statement is followed by a comment of the form "/# same as ... #/"
** that comment is used to determine the particular value of the opcode.
**
** Other keywords in the comment that follows each case are used to
** construct the OPFLG_INITIALIZER value that initializes opcodeProperty[].
** Keywords include: in1, in2, in3, out2_prerelease, out2, out3.  See
** the mkopcodeh.awk script for additional information.
**
** Documentation about VDBE opcodes is generated by scanning this file
** for lines of that contain "Opcode:".  That line and all subsequent
** comment lines are used in the generation of the opcode.html documentation
** file.
**
................................................................................
**
** The P1 parameter is not actually used by this opcode.  However, it
** is sometimes set to 1 instead of 0 as a hint to the command-line shell
** that this Goto is the bottom of a loop and that the lines from P2 down
** to the current line should be indented for EXPLAIN output.
*/
case OP_Goto: {             /* jump */

  pc = pOp->p2 - 1;

  /* Opcodes that are used as the bottom of a loop (OP_Next, OP_Prev,
  ** OP_VNext, OP_RowSetNext, or OP_SorterNext) all jump here upon
  ** completion.  Check to see if sqlite3_interrupt() has been called
  ** or if the progress callback needs to be invoked. 
  **
  ** This code uses unstructured "goto" statements and does not look clean.
................................................................................
*/
case OP_Gosub: {            /* jump */
  assert( pOp->p1>0 && pOp->p1<=(p->nMem-p->nCursor) );
  pIn1 = &aMem[pOp->p1];
  assert( VdbeMemDynamic(pIn1)==0 );
  memAboutToChange(p, pIn1);
  pIn1->flags = MEM_Int;
  pIn1->u.i = pc;
  REGISTER_TRACE(pOp->p1, pIn1);




  pc = pOp->p2 - 1;
  break;
}

/* Opcode:  Return P1 * * * *
**
** Jump to the next instruction after the address in register P1.  After
** the jump, register P1 becomes undefined.
*/
case OP_Return: {           /* in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags==MEM_Int );
  pc = (int)pIn1->u.i;
  pIn1->flags = MEM_Undefined;
  break;
}

/* Opcode: InitCoroutine P1 P2 P3 * *
**
** Set up register P1 so that it will Yield to the coroutine
................................................................................
  assert( pOp->p1>0 &&  pOp->p1<=(p->nMem-p->nCursor) );
  assert( pOp->p2>=0 && pOp->p2<p->nOp );
  assert( pOp->p3>=0 && pOp->p3<p->nOp );
  pOut = &aMem[pOp->p1];
  assert( !VdbeMemDynamic(pOut) );
  pOut->u.i = pOp->p3 - 1;
  pOut->flags = MEM_Int;
  if( pOp->p2 ) pc = pOp->p2 - 1;
  break;
}

/* Opcode:  EndCoroutine P1 * * * *
**
** The instruction at the address in register P1 is a Yield.
** Jump to the P2 parameter of that Yield.
................................................................................
  VdbeOp *pCaller;
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags==MEM_Int );
  assert( pIn1->u.i>=0 && pIn1->u.i<p->nOp );
  pCaller = &aOp[pIn1->u.i];
  assert( pCaller->opcode==OP_Yield );
  assert( pCaller->p2>=0 && pCaller->p2<p->nOp );
  pc = pCaller->p2 - 1;
  pIn1->flags = MEM_Undefined;
  break;
}

/* Opcode:  Yield P1 P2 * * *
**
** Swap the program counter with the value in register P1.  This
................................................................................
*/
case OP_Yield: {            /* in1, jump */
  int pcDest;
  pIn1 = &aMem[pOp->p1];
  assert( VdbeMemDynamic(pIn1)==0 );
  pIn1->flags = MEM_Int;
  pcDest = (int)pIn1->u.i;
  pIn1->u.i = pc;
  REGISTER_TRACE(pOp->p1, pIn1);
  pc = pcDest;
  break;
}

/* Opcode:  HaltIfNull  P1 P2 P3 P4 P5
** Synopsis:  if r[P3]=null halt
**
** Check the value in register P3.  If it is NULL then Halt using
................................................................................
** There is an implied "Halt 0 0 0" instruction inserted at the very end of
** every program.  So a jump past the last instruction of the program
** is the same as executing Halt.
*/
case OP_Halt: {
  const char *zType;
  const char *zLogFmt;




  if( pOp->p1==SQLITE_OK && p->pFrame ){
    /* Halt the sub-program. Return control to the parent frame. */
    VdbeFrame *pFrame = p->pFrame;
    p->pFrame = pFrame->pParent;
    p->nFrame--;
    sqlite3VdbeSetChanges(db, p->nChange);
    pc = sqlite3VdbeFrameRestore(pFrame);
    lastRowid = db->lastRowid;
    if( pOp->p2==OE_Ignore ){
      /* Instruction pc is the OP_Program that invoked the sub-program 
      ** currently being halted. If the p2 instruction of this OP_Halt
      ** instruction is set to OE_Ignore, then the sub-program is throwing
      ** an IGNORE exception. In this case jump to the address specified
      ** as the p2 of the calling OP_Program.  */
      pc = p->aOp[pc].p2-1;
    }
    aOp = p->aOp;
    aMem = p->aMem;

    break;
  }
  p->rc = pOp->p1;
  p->errorAction = (u8)pOp->p2;
  p->pc = pc;
  if( p->rc ){
    if( pOp->p5 ){
      static const char * const azType[] = { "NOT NULL", "UNIQUE", "CHECK",
                                             "FOREIGN KEY" };
      assert( pOp->p5>=1 && pOp->p5<=4 );
      testcase( pOp->p5==1 );
      testcase( pOp->p5==2 );
................................................................................
      sqlite3SetString(&p->zErrMsg, db, "%s constraint failed: %s", 
                       zType, pOp->p4.z);
    }else if( pOp->p4.z ){
      sqlite3SetString(&p->zErrMsg, db, "%s", pOp->p4.z);
    }else{
      sqlite3SetString(&p->zErrMsg, db, "%s constraint failed", zType);
    }
    sqlite3_log(pOp->p1, zLogFmt, pc, p->zSql, p->zErrMsg);
  }
  rc = sqlite3VdbeHalt(p);
  assert( rc==SQLITE_BUSY || rc==SQLITE_OK || rc==SQLITE_ERROR );
  if( rc==SQLITE_BUSY ){
    p->rc = rc = SQLITE_BUSY;
  }else{
    assert( rc==SQLITE_OK || (p->rc&0xff)==SQLITE_CONSTRAINT );
    assert( rc==SQLITE_OK || db->nDeferredCons>0 || db->nDeferredImmCons>0 );
    rc = p->rc ? SQLITE_ERROR : SQLITE_DONE;
  }

  goto vdbe_return;
}

/* Opcode: Integer P1 P2 * * *
** Synopsis: r[P2]=P1
**
** The 32-bit integer value P1 is written into register P2.
*/
case OP_Integer: {         /* out2-prerelease */

  pOut->u.i = pOp->p1;
  break;
}

/* Opcode: Int64 * P2 * P4 *
** Synopsis: r[P2]=P4
**
** P4 is a pointer to a 64-bit integer value.
** Write that value into register P2.
*/
case OP_Int64: {           /* out2-prerelease */

  assert( pOp->p4.pI64!=0 );
  pOut->u.i = *pOp->p4.pI64;
  break;
}

#ifndef SQLITE_OMIT_FLOATING_POINT
/* Opcode: Real * P2 * P4 *
** Synopsis: r[P2]=P4
**
** P4 is a pointer to a 64-bit floating point value.
** Write that value into register P2.
*/
case OP_Real: {            /* same as TK_FLOAT, out2-prerelease */

  pOut->flags = MEM_Real;
  assert( !sqlite3IsNaN(*pOp->p4.pReal) );
  pOut->u.r = *pOp->p4.pReal;
  break;
}
#endif

................................................................................
** Synopsis: r[P2]='P4'
**
** P4 points to a nul terminated UTF-8 string. This opcode is transformed 
** into a String opcode before it is executed for the first time.  During
** this transformation, the length of string P4 is computed and stored
** as the P1 parameter.
*/
case OP_String8: {         /* same as TK_STRING, out2-prerelease */
  assert( pOp->p4.z!=0 );

  pOp->opcode = OP_String;
  pOp->p1 = sqlite3Strlen30(pOp->p4.z);

#ifndef SQLITE_OMIT_UTF16
  if( encoding!=SQLITE_UTF8 ){
    rc = sqlite3VdbeMemSetStr(pOut, pOp->p4.z, -1, SQLITE_UTF8, SQLITE_STATIC);
    if( rc==SQLITE_TOOBIG ) goto too_big;
................................................................................
** The string value P4 of length P1 (bytes) is stored in register P2.
**
** If P5!=0 and the content of register P3 is greater than zero, then
** the datatype of the register P2 is converted to BLOB.  The content is
** the same sequence of bytes, it is merely interpreted as a BLOB instead
** of a string, as if it had been CAST.
*/
case OP_String: {          /* out2-prerelease */
  assert( pOp->p4.z!=0 );

  pOut->flags = MEM_Str|MEM_Static|MEM_Term;
  pOut->z = pOp->p4.z;
  pOut->n = pOp->p1;
  pOut->enc = encoding;
  UPDATE_MAX_BLOBSIZE(pOut);
  if( pOp->p5 ){
    assert( pOp->p3>0 );
................................................................................
** is less than P2 (typically P3 is zero) then only register P2 is
** set to NULL.
**
** If the P1 value is non-zero, then also set the MEM_Cleared flag so that
** NULL values will not compare equal even if SQLITE_NULLEQ is set on
** OP_Ne or OP_Eq.
*/
case OP_Null: {           /* out2-prerelease */
  int cnt;
  u16 nullFlag;

  cnt = pOp->p3-pOp->p2;
  assert( pOp->p3<=(p->nMem-p->nCursor) );
  pOut->flags = nullFlag = pOp->p1 ? (MEM_Null|MEM_Cleared) : MEM_Null;
  while( cnt>0 ){
    pOut++;
    memAboutToChange(p, pOut);
    sqlite3VdbeMemSetNull(pOut);
................................................................................

/* Opcode: Blob P1 P2 * P4 *
** Synopsis: r[P2]=P4 (len=P1)
**
** P4 points to a blob of data P1 bytes long.  Store this
** blob in register P2.
*/
case OP_Blob: {                /* out2-prerelease */
  assert( pOp->p1 <= SQLITE_MAX_LENGTH );

  sqlite3VdbeMemSetStr(pOut, pOp->p4.z, pOp->p1, 0, 0);
  pOut->enc = encoding;
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Variable P1 P2 * P4 *
................................................................................
** Synopsis: r[P2]=parameter(P1,P4)
**
** Transfer the values of bound parameter P1 into register P2
**
** If the parameter is named, then its name appears in P4.
** The P4 value is used by sqlite3_bind_parameter_name().
*/
case OP_Variable: {            /* out2-prerelease */
  Mem *pVar;       /* Value being transferred */

  assert( pOp->p1>0 && pOp->p1<=p->nVar );
  assert( pOp->p4.z==0 || pOp->p4.z==p->azVar[pOp->p1-1] );
  pVar = &p->aVar[pOp->p1 - 1];
  if( sqlite3VdbeMemTooBig(pVar) ){
    goto too_big;
  }

  sqlite3VdbeMemShallowCopy(pOut, pVar, MEM_Static);
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Move P1 P2 P3 * *
** Synopsis:  r[P2@P3]=r[P1@P3]
................................................................................
    sqlite3VdbeMemNulTerminate(&pMem[i]);
    REGISTER_TRACE(pOp->p1+i, &pMem[i]);
  }
  if( db->mallocFailed ) goto no_mem;

  /* Return SQLITE_ROW
  */
  p->pc = pc + 1;
  rc = SQLITE_ROW;
  goto vdbe_return;
}

/* Opcode: Concat P1 P2 P3 * *
** Synopsis: r[P3]=r[P2]+r[P1]
**
................................................................................
    apVal[i] = pArg;
    Deephemeralize(pArg);
    REGISTER_TRACE(pOp->p2+i, pArg);
  }

  assert( pOp->p4type==P4_FUNCDEF );
  ctx.pFunc = pOp->p4.pFunc;
  ctx.iOp = pc;
  ctx.pVdbe = p;
  MemSetTypeFlag(ctx.pOut, MEM_Null);
  ctx.fErrorOrAux = 0;
  db->lastRowid = lastRowid;
  (*ctx.pFunc->xFunc)(&ctx, n, apVal); /* IMP: R-24505-23230 */
  lastRowid = db->lastRowid;  /* Remember rowid changes made by xFunc */

  /* If the function returned an error, throw an exception */
  if( ctx.fErrorOrAux ){
    if( ctx.isError ){
      sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3_value_text(ctx.pOut));
      rc = ctx.isError;
    }
    sqlite3VdbeDeleteAuxData(p, pc, pOp->p1);
  }

  /* Copy the result of the function into register P3 */
  sqlite3VdbeChangeEncoding(ctx.pOut, encoding);
  if( sqlite3VdbeMemTooBig(ctx.pOut) ){
    goto too_big;
  }
................................................................................
    applyAffinity(pIn1, SQLITE_AFF_NUMERIC, encoding);
    VdbeBranchTaken((pIn1->flags&MEM_Int)==0, 2);
    if( (pIn1->flags & MEM_Int)==0 ){
      if( pOp->p2==0 ){
        rc = SQLITE_MISMATCH;
        goto abort_due_to_error;
      }else{
        pc = pOp->p2 - 1;
        break;
      }
    }
  }
  MemSetTypeFlag(pIn1, MEM_Int);
  break;
}

................................................................................
      if( pOp->p5 & SQLITE_STOREP2 ){
        pOut = &aMem[pOp->p2];
        MemSetTypeFlag(pOut, MEM_Null);
        REGISTER_TRACE(pOp->p2, pOut);
      }else{
        VdbeBranchTaken(2,3);
        if( pOp->p5 & SQLITE_JUMPIFNULL ){
          pc = pOp->p2-1;
        }
      }
      break;
    }
  }else{
    /* Neither operand is NULL.  Do a comparison. */
    affinity = pOp->p5 & SQLITE_AFF_MASK;
................................................................................
    case OP_Eq:    res = res==0;     break;
    case OP_Ne:    res = res!=0;     break;
    case OP_Lt:    res = res<0;      break;
    case OP_Le:    res = res<=0;     break;
    case OP_Gt:    res = res>0;      break;
    default:       res = res>=0;     break;
  }







  if( pOp->p5 & SQLITE_STOREP2 ){
    pOut = &aMem[pOp->p2];
    memAboutToChange(p, pOut);
    MemSetTypeFlag(pOut, MEM_Int);
    pOut->u.i = res;
    REGISTER_TRACE(pOp->p2, pOut);
  }else{
    VdbeBranchTaken(res!=0, (pOp->p5 & SQLITE_NULLEQ)?2:3);
    if( res ){
      pc = pOp->p2-1;
    }
  }
  /* Undo any changes made by applyAffinity() to the input registers. */
  assert( (pIn1->flags & MEM_Dyn) == (flags1 & MEM_Dyn) );
  pIn1->flags = flags1;
  assert( (pIn3->flags & MEM_Dyn) == (flags3 & MEM_Dyn) );
  pIn3->flags = flags3;
  break;
}

/* Opcode: Permutation * * * P4 *
**
** Set the permutation used by the OP_Compare operator to be the array
** of integers in P4.
................................................................................
**
** Jump to the instruction at address P1, P2, or P3 depending on whether
** in the most recent OP_Compare instruction the P1 vector was less than
** equal to, or greater than the P2 vector, respectively.
*/
case OP_Jump: {             /* jump */
  if( iCompare<0 ){
    pc = pOp->p1 - 1;  VdbeBranchTaken(0,3);
  }else if( iCompare==0 ){
    pc = pOp->p2 - 1;  VdbeBranchTaken(1,3);
  }else{
    pc = pOp->p3 - 1;  VdbeBranchTaken(2,3);
  }
  break;
}

/* Opcode: And P1 P2 P3 * *
** Synopsis: r[P3]=(r[P1] && r[P2])
**
................................................................................
** All "once" flags are initially cleared whenever a prepared statement
** first begins to run.
*/
case OP_Once: {             /* jump */
  assert( pOp->p1<p->nOnceFlag );
  VdbeBranchTaken(p->aOnceFlag[pOp->p1]!=0, 2);
  if( p->aOnceFlag[pOp->p1] ){
    pc = pOp->p2-1;
  }else{
    p->aOnceFlag[pOp->p1] = 1;
  }
  break;
}

/* Opcode: If P1 P2 P3 * *
................................................................................
#else
    c = sqlite3VdbeRealValue(pIn1)!=0.0;
#endif
    if( pOp->opcode==OP_IfNot ) c = !c;
  }
  VdbeBranchTaken(c!=0, 2);
  if( c ){
    pc = pOp->p2-1;
  }
  break;
}

/* Opcode: IsNull P1 P2 * * *
** Synopsis:  if r[P1]==NULL goto P2
**
** Jump to P2 if the value in register P1 is NULL.
*/
case OP_IsNull: {            /* same as TK_ISNULL, jump, in1 */
  pIn1 = &aMem[pOp->p1];
  VdbeBranchTaken( (pIn1->flags & MEM_Null)!=0, 2);
  if( (pIn1->flags & MEM_Null)!=0 ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: NotNull P1 P2 * * *
** Synopsis: if r[P1]!=NULL goto P2
**
** Jump to P2 if the value in register P1 is not NULL.  
*/
case OP_NotNull: {            /* same as TK_NOTNULL, jump, in1 */
  pIn1 = &aMem[pOp->p1];
  VdbeBranchTaken( (pIn1->flags & MEM_Null)==0, 2);
  if( (pIn1->flags & MEM_Null)==0 ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: Column P1 P2 P3 P4 P5
** Synopsis:  r[P3]=PX
**
................................................................................
/* Opcode: Count P1 P2 * * *
** Synopsis: r[P2]=count()
**
** Store the number of entries (an integer value) in the table or index 
** opened by cursor P1 in register P2
*/
#ifndef SQLITE_OMIT_BTREECOUNT
case OP_Count: {         /* out2-prerelease */
  i64 nEntry;
  BtCursor *pCrsr;

  pCrsr = p->apCsr[pOp->p1]->pCursor;
  assert( pCrsr );
  nEntry = 0;  /* Not needed.  Only used to silence a warning. */
  rc = sqlite3BtreeCount(pCrsr, &nEntry);

  pOut->u.i = nEntry;
  break;
}
#endif

/* Opcode: Savepoint P1 * * P4 *
**
................................................................................
      int isTransaction = pSavepoint->pNext==0 && db->isTransactionSavepoint;
      if( isTransaction && p1==SAVEPOINT_RELEASE ){
        if( (rc = sqlite3VdbeCheckFk(p, 1))!=SQLITE_OK ){
          goto vdbe_return;
        }
        db->autoCommit = 1;
        if( sqlite3VdbeHalt(p)==SQLITE_BUSY ){
          p->pc = pc;
          db->autoCommit = 0;
          p->rc = rc = SQLITE_BUSY;
          goto vdbe_return;
        }
        db->isTransactionSavepoint = 0;
        rc = p->rc;
      }else{
................................................................................
      sqlite3RollbackAll(db, SQLITE_ABORT_ROLLBACK);
      db->autoCommit = 1;
    }else if( (rc = sqlite3VdbeCheckFk(p, 1))!=SQLITE_OK ){
      goto vdbe_return;
    }else{
      db->autoCommit = (u8)desiredAutoCommit;
      if( sqlite3VdbeHalt(p)==SQLITE_BUSY ){
        p->pc = pc;
        db->autoCommit = (u8)(1-desiredAutoCommit);
        p->rc = rc = SQLITE_BUSY;
        goto vdbe_return;
      }
    }
    assert( db->nStatement==0 );
    sqlite3CloseSavepoints(db);
................................................................................
    goto abort_due_to_error;
  }
  pBt = db->aDb[pOp->p1].pBt;

  if( pBt ){
    rc = sqlite3BtreeBeginTrans(pBt, pOp->p2);
    if( rc==SQLITE_BUSY ){
      p->pc = pc;
      p->rc = rc = SQLITE_BUSY;
      goto vdbe_return;
    }
    if( rc!=SQLITE_OK ){
      goto abort_due_to_error;
    }

................................................................................
** the main database file and P1==1 is the database file used to store
** temporary tables.
**
** There must be a read-lock on the database (either a transaction
** must be started or there must be an open cursor) before
** executing this instruction.
*/
case OP_ReadCookie: {               /* out2-prerelease */
  int iMeta;
  int iDb;
  int iCookie;

  assert( p->bIsReader );
  iDb = pOp->p1;
  iCookie = pOp->p3;
  assert( pOp->p3<SQLITE_N_BTREE_META );
  assert( iDb>=0 && iDb<db->nDb );
  assert( db->aDb[iDb].pBt!=0 );
  assert( DbMaskTest(p->btreeMask, iDb) );

  sqlite3BtreeGetMeta(db->aDb[iDb].pBt, iCookie, (u32 *)&iMeta);

  pOut->u.i = iMeta;
  break;
}

/* Opcode: SetCookie P1 P2 P3 * *
**
** Write the content of register P3 (interpreted as an integer)
................................................................................
*/
case OP_SequenceTest: {
  VdbeCursor *pC;
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC->pSorter );
  if( (pC->seqCount++)==0 ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: OpenPseudo P1 P2 P3 * *
** Synopsis: P3 columns in r[P2]
**
................................................................................

    /* If the P3 value could not be converted into an integer without
    ** loss of information, then special processing is required... */
    if( (pIn3->flags & MEM_Int)==0 ){
      if( (pIn3->flags & MEM_Real)==0 ){
        /* If the P3 value cannot be converted into any kind of a number,
        ** then the seek is not possible, so jump to P2 */
        pc = pOp->p2 - 1;  VdbeBranchTaken(1,2);
        break;
      }

      /* If the approximation iKey is larger than the actual real search
      ** term, substitute >= for > and < for <=. e.g. if the search term
      ** is 4.9 and the integer approximation 5:
      **
................................................................................
      */
      res = sqlite3BtreeEof(pC->pCursor);
    }
  }
  assert( pOp->p2>0 );
  VdbeBranchTaken(res!=0,2);
  if( res ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: Seek P1 P2 * * *
** Synopsis:  intkey=r[P2]
**
................................................................................
**
** See also: NotFound, Found, NotExists
*/
case OP_NoConflict:     /* jump, in3 */
case OP_NotFound:       /* jump, in3 */
case OP_Found: {        /* jump, in3 */
  int alreadyExists;

  int ii;
  VdbeCursor *pC;
  int res;
  char *pFree;
  UnpackedRecord *pIdxKey;
  UnpackedRecord r;
  char aTempRec[ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*4 + 7];
................................................................................
  assert( pC!=0 );
#ifdef SQLITE_DEBUG
  pC->seekOp = pOp->opcode;
#endif
  pIn3 = &aMem[pOp->p3];
  assert( pC->pCursor!=0 );
  assert( pC->isTable==0 );
  pFree = 0;  /* Not needed.  Only used to suppress a compiler warning. */
  if( pOp->p4.i>0 ){
    r.pKeyInfo = pC->pKeyInfo;
    r.nField = (u16)pOp->p4.i;
    r.aMem = pIn3;
    for(ii=0; ii<r.nField; ii++){
      assert( memIsValid(&r.aMem[ii]) );
      ExpandBlob(&r.aMem[ii]);
................................................................................
    );
    if( pIdxKey==0 ) goto no_mem;
    assert( pIn3->flags & MEM_Blob );
    ExpandBlob(pIn3);
    sqlite3VdbeRecordUnpack(pC->pKeyInfo, pIn3->n, pIn3->z, pIdxKey);
  }
  pIdxKey->default_rc = 0;

  if( pOp->opcode==OP_NoConflict ){
    /* For the OP_NoConflict opcode, take the jump if any of the
    ** input fields are NULL, since any key with a NULL will not
    ** conflict */
    for(ii=0; ii<pIdxKey->nField; ii++){
      if( pIdxKey->aMem[ii].flags & MEM_Null ){
        pc = pOp->p2 - 1; VdbeBranchTaken(1,2);
        break;
      }
    }
  }
  rc = sqlite3BtreeMovetoUnpacked(pC->pCursor, pIdxKey, 0, 0, &res);
  if( pOp->p4.i==0 ){
    sqlite3DbFree(db, pFree);
  }
  if( rc!=SQLITE_OK ){
    break;
  }
  pC->seekResult = res;
  alreadyExists = (res==0);
  pC->nullRow = 1-alreadyExists;
  pC->deferredMoveto = 0;
  pC->cacheStatus = CACHE_STALE;
  if( pOp->opcode==OP_Found ){
    VdbeBranchTaken(alreadyExists!=0,2);
    if( alreadyExists ) pc = pOp->p2 - 1;
  }else{
    VdbeBranchTaken(alreadyExists==0,2);
    if( !alreadyExists ) pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: NotExists P1 P2 P3 * *
** Synopsis: intkey=r[P3]
**
................................................................................
  iKey = pIn3->u.i;
  rc = sqlite3BtreeMovetoUnpacked(pCrsr, 0, iKey, 0, &res);
  pC->movetoTarget = iKey;  /* Used by OP_Delete */
  pC->nullRow = 0;
  pC->cacheStatus = CACHE_STALE;
  pC->deferredMoveto = 0;
  VdbeBranchTaken(res!=0,2);
  if( res!=0 ){
    pc = pOp->p2 - 1;
  }
  pC->seekResult = res;

  break;
}

/* Opcode: Sequence P1 P2 * * *
** Synopsis: r[P2]=cursor[P1].ctr++
**
** Find the next available sequence number for cursor P1.
** Write the sequence number into register P2.
** The sequence number on the cursor is incremented after this
** instruction.  
*/
case OP_Sequence: {           /* out2-prerelease */
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( p->apCsr[pOp->p1]!=0 );

  pOut->u.i = p->apCsr[pOp->p1]->seqCount++;
  break;
}


/* Opcode: NewRowid P1 P2 P3 * *
** Synopsis: r[P2]=rowid
................................................................................
** If P3>0 then P3 is a register in the root frame of this VDBE that holds 
** the largest previously generated record number. No new record numbers are
** allowed to be less than this value. When this value reaches its maximum, 
** an SQLITE_FULL error is generated. The P3 register is updated with the '
** generated record number. This P3 mechanism is used to help implement the
** AUTOINCREMENT feature.
*/
case OP_NewRowid: {           /* out2-prerelease */
  i64 v;                 /* The new rowid */
  VdbeCursor *pC;        /* Cursor of table to get the new rowid */
  int res;               /* Result of an sqlite3BtreeLast() */
  int cnt;               /* Counter to limit the number of searches */
  Mem *pMem;             /* Register holding largest rowid for AUTOINCREMENT */
  VdbeFrame *pFrame;     /* Root frame of VDBE */

  v = 0;
  res = 0;

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  if( NEVER(pC->pCursor==0) ){
    /* The zero initialization above is all that is needed */
  }else{
    /* The next rowid or record number (different terms for the same
................................................................................
  assert( isSorter(pC) );
  assert( pOp->p4type==P4_INT32 );
  pIn3 = &aMem[pOp->p3];
  nKeyCol = pOp->p4.i;
  res = 0;
  rc = sqlite3VdbeSorterCompare(pC, pIn3, nKeyCol, &res);
  VdbeBranchTaken(res!=0,2);
  if( res ){
    pc = pOp->p2-1;
  }
  break;
};

/* Opcode: SorterData P1 P2 P3 * *
** Synopsis: r[P2]=data
**
** Write into register P2 the current sorter data for sorter cursor P1.
................................................................................
** Store in register P2 an integer which is the key of the table entry that
** P1 is currently point to.
**
** P1 can be either an ordinary table or a virtual table.  There used to
** be a separate OP_VRowid opcode for use with virtual tables, but this
** one opcode now works for both table types.
*/
case OP_Rowid: {                 /* out2-prerelease */
  VdbeCursor *pC;
  i64 v;
  sqlite3_vtab *pVtab;
  const sqlite3_module *pModule;


  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  assert( pC->pseudoTableReg==0 || pC->nullRow );
  if( pC->nullRow ){
    pOut->flags = MEM_Null;
    break;
................................................................................
  pC->cacheStatus = CACHE_STALE;
  pC->seekResult = pOp->p3;
#ifdef SQLITE_DEBUG
  pC->seekOp = OP_Last;
#endif
  if( pOp->p2>0 ){
    VdbeBranchTaken(res!=0,2);
    if( res ) pc = pOp->p2 - 1;
  }
  break;
}


/* Opcode: Sort P1 P2 * * *
**
................................................................................
    rc = sqlite3BtreeFirst(pCrsr, &res);
    pC->deferredMoveto = 0;
    pC->cacheStatus = CACHE_STALE;
  }
  pC->nullRow = (u8)res;
  assert( pOp->p2>0 && pOp->p2<p->nOp );
  VdbeBranchTaken(res!=0,2);
  if( res ){
    pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: Next P1 P2 P3 P4 P5
**
** Advance cursor P1 so that it points to the next key/data pair in its
** table or index.  If there are no more key/value pairs then fall through
................................................................................

  rc = pOp->p4.xAdvance(pC->pCursor, &res);
next_tail:
  pC->cacheStatus = CACHE_STALE;
  VdbeBranchTaken(res==0,2);
  if( res==0 ){
    pC->nullRow = 0;
    pc = pOp->p2 - 1;
    p->aCounter[pOp->p5]++;
#ifdef SQLITE_TEST
    sqlite3_search_count++;
#endif

  }else{
    pC->nullRow = 1;
  }
  goto check_for_interrupt;
}

/* Opcode: IdxInsert P1 P2 P3 * P5
................................................................................
**
** Write into register P2 an integer which is the last entry in the record at
** the end of the index key pointed to by cursor P1.  This integer should be
** the rowid of the table entry to which this index entry points.
**
** See also: Rowid, MakeRecord.
*/
case OP_IdxRowid: {              /* out2-prerelease */
  BtCursor *pCrsr;
  VdbeCursor *pC;
  i64 rowid;


  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  pCrsr = pC->pCursor;
  assert( pCrsr!=0 );
  pOut->flags = MEM_Null;
  assert( pC->isTable==0 );
................................................................................
    assert( pOp->opcode==OP_IdxLE || pOp->opcode==OP_IdxLT );
    res = -res;
  }else{
    assert( pOp->opcode==OP_IdxGE || pOp->opcode==OP_IdxGT );
    res++;
  }
  VdbeBranchTaken(res>0,2);
  if( res>0 ){
    pc = pOp->p2 - 1 ;
  }
  break;
}

/* Opcode: Destroy P1 P2 P3 * *
**
** Delete an entire database table or index whose root page in the database
** file is given by P1.
................................................................................
** is stored in register P2.  If no page 
** movement was required (because the table being dropped was already 
** the last one in the database) then a zero is stored in register P2.
** If AUTOVACUUM is disabled then a zero is stored in register P2.
**
** See also: Clear
*/
case OP_Destroy: {     /* out2-prerelease */
  int iMoved;
  int iDb;

  assert( p->readOnly==0 );

  pOut->flags = MEM_Null;
  if( db->nVdbeRead > db->nVDestroy+1 ){
    rc = SQLITE_LOCKED;
    p->errorAction = OE_Abort;
  }else{
    iDb = pOp->p3;
    assert( DbMaskTest(p->btreeMask, iDb) );
................................................................................
** Allocate a new index in the main database file if P1==0 or in the
** auxiliary database file if P1==1 or in an attached database if
** P1>1.  Write the root page number of the new table into
** register P2.
**
** See documentation on OP_CreateTable for additional information.
*/
case OP_CreateIndex:            /* out2-prerelease */
case OP_CreateTable: {          /* out2-prerelease */
  int pgno;
  int flags;
  Db *pDb;


  pgno = 0;
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( DbMaskTest(p->btreeMask, pOp->p1) );
  assert( p->readOnly==0 );
  pDb = &db->aDb[pOp->p1];
  assert( pDb->pBt!=0 );
  if( pOp->opcode==OP_CreateTable ){
................................................................................

  pIn1 = &aMem[pOp->p1];
  if( (pIn1->flags & MEM_RowSet)==0 
   || sqlite3RowSetNext(pIn1->u.pRowSet, &val)==0
  ){
    /* The boolean index is empty */
    sqlite3VdbeMemSetNull(pIn1);
    pc = pOp->p2 - 1;
    VdbeBranchTaken(1,2);

  }else{
    /* A value was pulled from the index */
    sqlite3VdbeMemSetInt64(&aMem[pOp->p3], val);
    VdbeBranchTaken(0,2);

  }
  goto check_for_interrupt;
}

/* Opcode: RowSetTest P1 P2 P3 P4
** Synopsis: if r[P3] in rowset(P1) goto P2
**
................................................................................
  }

  assert( pOp->p4type==P4_INT32 );
  assert( iSet==-1 || iSet>=0 );
  if( iSet ){
    exists = sqlite3RowSetTest(pIn1->u.pRowSet, iSet, pIn3->u.i);
    VdbeBranchTaken(exists!=0,2);
    if( exists ){
      pc = pOp->p2 - 1;
      break;
    }
  }
  if( iSet>=0 ){
    sqlite3RowSetInsert(pIn1->u.pRowSet, pIn3->u.i);
  }
  break;
}

................................................................................
    sqlite3VdbeMemRelease(pRt);
    pRt->flags = MEM_Frame;
    pRt->u.pFrame = pFrame;

    pFrame->v = p;
    pFrame->nChildMem = nMem;
    pFrame->nChildCsr = pProgram->nCsr;
    pFrame->pc = pc;
    pFrame->aMem = p->aMem;
    pFrame->nMem = p->nMem;
    pFrame->apCsr = p->apCsr;
    pFrame->nCursor = p->nCursor;
    pFrame->aOp = p->aOp;
    pFrame->nOp = p->nOp;
    pFrame->token = pProgram->token;
................................................................................
      pMem->flags = MEM_Undefined;
      pMem->db = db;
    }
  }else{
    pFrame = pRt->u.pFrame;
    assert( pProgram->nMem+pProgram->nCsr==pFrame->nChildMem );
    assert( pProgram->nCsr==pFrame->nChildCsr );
    assert( pc==pFrame->pc );
  }

  p->nFrame++;
  pFrame->pParent = p->pFrame;
  pFrame->lastRowid = lastRowid;
  pFrame->nChange = p->nChange;
  pFrame->nDbChange = p->db->nChange;
................................................................................
  p->aOp = aOp = pProgram->aOp;
  p->nOp = pProgram->nOp;
  p->aOnceFlag = (u8 *)&p->apCsr[p->nCursor];
  p->nOnceFlag = pProgram->nOnce;
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
  p->anExec = 0;
#endif
  pc = -1;
  memset(p->aOnceFlag, 0, p->nOnceFlag);

  break;
}

/* Opcode: Param P1 P2 * * *
**
................................................................................
** address space. This is used by trigger programs to access the new.* 
** and old.* values.
**
** The address of the cell in the parent frame is determined by adding
** the value of the P1 argument to the value of the P1 argument to the
** calling OP_Program instruction.
*/
case OP_Param: {           /* out2-prerelease */
  VdbeFrame *pFrame;
  Mem *pIn;

  pFrame = p->pFrame;
  pIn = &pFrame->aMem[pOp->p1 + pFrame->aOp[pFrame->pc].p1];   
  sqlite3VdbeMemShallowCopy(pOut, pIn, MEM_Ephem);
  break;
}

#endif /* #ifndef SQLITE_OMIT_TRIGGER */
................................................................................
** is zero (the one that counts deferred constraint violations). If P1 is
** zero, the jump is taken if the statement constraint-counter is zero
** (immediate foreign key constraint violations).
*/
case OP_FkIfZero: {         /* jump */
  if( pOp->p1 ){
    VdbeBranchTaken(db->nDeferredCons==0 && db->nDeferredImmCons==0, 2);
    if( db->nDeferredCons==0 && db->nDeferredImmCons==0 ) pc = pOp->p2-1;
  }else{
    VdbeBranchTaken(p->nFkConstraint==0 && db->nDeferredImmCons==0, 2);
    if( p->nFkConstraint==0 && db->nDeferredImmCons==0 ) pc = pOp->p2-1;
  }
  break;
}
#endif /* #ifndef SQLITE_OMIT_FOREIGN_KEY */

#ifndef SQLITE_OMIT_AUTOINCREMENT
/* Opcode: MemMax P1 P2 * * *
................................................................................
** If the initial value of register P1 is less than 1, then the
** value is unchanged and control passes through to the next instruction.
*/
case OP_IfPos: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  VdbeBranchTaken( pIn1->u.i>0, 2);
  if( pIn1->u.i>0 ){
     pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: IfNeg P1 P2 P3 * *
** Synopsis: r[P1]+=P3, if r[P1]<0 goto P2
**
** Register P1 must contain an integer.  Add literal P3 to the value in
................................................................................
** register P1 then if the value of register P1 is less than zero, jump to P2. 
*/
case OP_IfNeg: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  pIn1->u.i += pOp->p3;
  VdbeBranchTaken(pIn1->u.i<0, 2);
  if( pIn1->u.i<0 ){
     pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: IfNotZero P1 P2 P3 * *
** Synopsis: if r[P1]!=0 then r[P1]+=P3, goto P2
**
** Register P1 must contain an integer.  If the content of register P1 is
................................................................................
*/
case OP_IfNotZero: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  VdbeBranchTaken(pIn1->u.i<0, 2);
  if( pIn1->u.i ){
     pIn1->u.i += pOp->p3;
     pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: DecrJumpZero P1 P2 * * *
** Synopsis: if (--r[P1])==0 goto P2
**
................................................................................
** then jump to P2 if the new value is exactly zero.
*/
case OP_DecrJumpZero: {      /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  pIn1->u.i--;
  VdbeBranchTaken(pIn1->u.i==0, 2);
  if( pIn1->u.i==0 ){
     pc = pOp->p2 - 1;
  }
  break;
}


/* Opcode: JumpZeroIncr P1 P2 * * *
** Synopsis: if (r[P1]++)==0 ) goto P2
**
................................................................................
** zero, then jump to P2.  Increment register P1 regardless of whether or
** not the jump is taken.
*/
case OP_JumpZeroIncr: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  VdbeBranchTaken(pIn1->u.i==0, 2);
  if( (pIn1->u.i++)==0 ){
     pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: AggStep * P2 P3 P4 P5
** Synopsis: accum=r[P3] step(r[P2@P5])
**
** Execute the step function for an aggregate.  The
................................................................................
  assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
  ctx.pMem = pMem = &aMem[pOp->p3];
  pMem->n++;
  sqlite3VdbeMemInit(&t, db, MEM_Null);
  ctx.pOut = &t;
  ctx.isError = 0;
  ctx.pVdbe = p;
  ctx.iOp = pc;
  ctx.skipFlag = 0;
  (ctx.pFunc->xStep)(&ctx, n, apVal); /* IMP: R-24505-23230 */
  if( ctx.isError ){
    sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3_value_text(&t));
    rc = ctx.isError;
  }
  if( ctx.skipFlag ){
................................................................................
** modes (delete, truncate, persist, off and memory), this is a simple
** operation. No IO is required.
**
** If changing into or out of WAL mode the procedure is more complicated.
**
** Write a string containing the final journal-mode to register P2.
*/
case OP_JournalMode: {    /* out2-prerelease */
  Btree *pBt;                     /* Btree to change journal mode of */
  Pager *pPager;                  /* Pager associated with pBt */
  int eNew;                       /* New journal mode */
  int eOld;                       /* The old journal mode */
#ifndef SQLITE_OMIT_WAL
  const char *zFilename;          /* Name of database file for pPager */
#endif


  eNew = pOp->p3;
  assert( eNew==PAGER_JOURNALMODE_DELETE 
       || eNew==PAGER_JOURNALMODE_TRUNCATE 
       || eNew==PAGER_JOURNALMODE_PERSIST 
       || eNew==PAGER_JOURNALMODE_OFF
       || eNew==PAGER_JOURNALMODE_MEMORY
       || eNew==PAGER_JOURNALMODE_WAL
................................................................................
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( DbMaskTest(p->btreeMask, pOp->p1) );
  assert( p->readOnly==0 );
  pBt = db->aDb[pOp->p1].pBt;
  rc = sqlite3BtreeIncrVacuum(pBt);
  VdbeBranchTaken(rc==SQLITE_DONE,2);
  if( rc==SQLITE_DONE ){
    pc = pOp->p2 - 1;
    rc = SQLITE_OK;

  }
  break;
}
#endif

/* Opcode: Expire P1 * * * *
**
................................................................................

  /* Grab the index number and argc parameters */
  assert( (pQuery->flags&MEM_Int)!=0 && pArgc->flags==MEM_Int );
  nArg = (int)pArgc->u.i;
  iQuery = (int)pQuery->u.i;

  /* Invoke the xFilter method */
  {
    res = 0;
    apArg = p->apArg;
    for(i = 0; i<nArg; i++){
      apArg[i] = &pArgc[i+1];
    }

    rc = pModule->xFilter(pVtabCursor, iQuery, pOp->p4.z, nArg, apArg);
    sqlite3VtabImportErrmsg(p, pVtab);
    if( rc==SQLITE_OK ){
      res = pModule->xEof(pVtabCursor);
    }

    VdbeBranchTaken(res!=0,2);
    if( res ){
      pc = pOp->p2 - 1;
    }
  }
  pCur->nullRow = 0;

  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VColumn P1 P2 P3 * *
** Synopsis: r[P3]=vcolumn(P2)
................................................................................
  sqlite3VtabImportErrmsg(p, pVtab);
  if( rc==SQLITE_OK ){
    res = pModule->xEof(pCur->pVtabCursor);
  }
  VdbeBranchTaken(!res,2);
  if( !res ){
    /* If there is data, jump to P2 */
    pc = pOp->p2 - 1;
  }
  goto check_for_interrupt;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VRename P1 * * P4 *
................................................................................
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef  SQLITE_OMIT_PAGER_PRAGMAS
/* Opcode: Pagecount P1 P2 * * *
**
** Write the current number of pages in database P1 to memory cell P2.
*/
case OP_Pagecount: {            /* out2-prerelease */

  pOut->u.i = sqlite3BtreeLastPage(db->aDb[pOp->p1].pBt);
  break;
}
#endif


#ifndef  SQLITE_OMIT_PAGER_PRAGMAS
................................................................................
**
** Try to set the maximum page count for database P1 to the value in P3.
** Do not let the maximum page count fall below the current page count and
** do not change the maximum page count value if P3==0.
**
** Store the maximum page count after the change in register P2.
*/
case OP_MaxPgcnt: {            /* out2-prerelease */
  unsigned int newMax;
  Btree *pBt;


  pBt = db->aDb[pOp->p1].pBt;
  newMax = 0;
  if( pOp->p3 ){
    newMax = sqlite3BtreeLastPage(pBt);
    if( newMax < (unsigned)pOp->p3 ) newMax = (unsigned)pOp->p3;
  }
  pOut->u.i = sqlite3BtreeMaxPageCount(pBt, newMax);
................................................................................
**
** If P2 is not zero, jump to instruction P2.
*/
case OP_Init: {          /* jump */
  char *zTrace;
  char *z;

  if( pOp->p2 ){
    pc = pOp->p2 - 1;
  }
#ifndef SQLITE_OMIT_TRACE
  if( db->xTrace
   && !p->doingRerun
   && (zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql))!=0
  ){
    z = sqlite3VdbeExpandSql(p, zTrace);
    db->xTrace(db->pTraceArg, z);
................................................................................
  if( (db->flags & SQLITE_SqlTrace)!=0
   && (zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql))!=0
  ){
    sqlite3DebugPrintf("SQL-trace: %s\n", zTrace);
  }
#endif /* SQLITE_DEBUG */
#endif /* SQLITE_OMIT_TRACE */

  break;
}


/* Opcode: Noop * * * * *
**
** Do nothing.  This instruction is often useful as a jump
................................................................................

    /* The following code adds nothing to the actual functionality
    ** of the program.  It is only here for testing and debugging.
    ** On the other hand, it does burn CPU cycles every time through
    ** the evaluator loop.  So we can leave it out when NDEBUG is defined.
    */
#ifndef NDEBUG
    assert( pc>=-1 && pc<p->nOp );

#ifdef SQLITE_DEBUG
    if( db->flags & SQLITE_VdbeTrace ){
      if( rc!=0 ) printf("rc=%d\n",rc);
      if( pOp->opflags & (OPFLG_OUT2_PRERELEASE|OPFLG_OUT2) ){
        registerTrace(pOp->p2, &aMem[pOp->p2]);
      }
      if( pOp->opflags & OPFLG_OUT3 ){
        registerTrace(pOp->p3, &aMem[pOp->p3]);
      }
    }
#endif  /* SQLITE_DEBUG */
................................................................................
  ** an error of some kind.
  */
vdbe_error_halt:
  assert( rc );
  p->rc = rc;
  testcase( sqlite3GlobalConfig.xLog!=0 );
  sqlite3_log(rc, "statement aborts at %d: [%s] %s", 
                   pc, p->zSql, p->zErrMsg);
  sqlite3VdbeHalt(p);
  if( rc==SQLITE_IOERR_NOMEM ) db->mallocFailed = 1;
  rc = SQLITE_ERROR;
  if( resetSchemaOnFault>0 ){
    sqlite3ResetOneSchema(db, resetSchemaOnFault-1);
  }








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520
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550
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...
620
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634
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649
...
652
653
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658















659
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663
664
665
666
667
668
...
710
711
712
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719
720
721
722
723
724
...
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
...
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
...
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
...
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
...
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
...
923
924
925
926
927
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929
930
931
932
933
934
935
936
937
938
939
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949
950
951
952
953
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955
956
957
958
959
960
961
962
963
964
...
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
....
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
....
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
....
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
....
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
....
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
....
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
....
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
....
1736
1737
1738
1739
1740
1741
1742
1743

1744
1745
1746
1747
1748
1749
1750
....
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
....
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998





1999
2000
2001
2002
2003
2004
2005
....
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
....
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
....
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
....
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
....
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
....
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
....
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
....
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
....
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
....
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
....
3745
3746
3747
3748
3749
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3753
3754
3755
3756
3757
3758
3759
....
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
....
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
....
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904

3905

3906
3907
3908
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3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
....
3961
3962
3963
3964
3965
3966
3967



3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
....
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
....
4372
4373
4374
4375
4376
4377
4378
4379


4380
4381
4382
4383
4384
4385
4386
....
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
....
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
....
4657
4658
4659
4660
4661
4662
4663
4664


4665
4666
4667
4668
4669
4670
4671
....
4768
4769
4770
4771
4772
4773
4774

4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
....
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
....
4998
4999
5000
5001
5002
5003
5004
5005


5006
5007
5008
5009
5010
5011
5012
....
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
....
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
....
5368
5369
5370
5371
5372
5373
5374

5375
5376
5377
5378

5379
5380
5381
5382
5383
5384
5385
5386
5387
....
5424
5425
5426
5427
5428
5429
5430
5431



5432
5433
5434
5435
5436
5437
5438
....
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
....
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
....
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
....
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
....
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
....
5676
5677
5678
5679
5680
5681
5682
5683


5684
5685
5686
5687
5688
5689
5690
....
5691
5692
5693
5694
5695
5696
5697
5698


5699
5700
5701
5702
5703
5704
5705
....
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
....
5724
5725
5726
5727
5728
5729
5730
5731


5732
5733
5734
5735
5736
5737
5738
....
5740
5741
5742
5743
5744
5745
5746
5747


5748
5749
5750
5751
5752
5753
5754
....
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
....
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
....
6003
6004
6005
6006
6007
6008
6009

6010
6011
6012
6013
6014
6015
6016
6017
6018
....
6214
6215
6216
6217
6218
6219
6220

6221
6222
6223
6224
6225

6226
6227
6228
6229
6230
6231
6232
6233





6234
6235
6236
6237
6238
6239
6240
....
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
....
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
....
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
....
6486
6487
6488
6489
6490
6491
6492



6493
6494
6495
6496
6497
6498
6499
....
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
....
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
....
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
  Savepoint *p;
  for(p=db->pSavepoint; p; p=p->pNext) n++;
  assert( n==(db->nSavepoint + db->isTransactionSavepoint) );
  return 1;
}
#endif

/*
** Return the register of pOp->p2 after first preparing it to be
** overwritten with an integer value.
*/ 
static Mem *out2Prerelease(Vdbe *p, VdbeOp *pOp){
  Mem *pOut;
  assert( pOp->p2>0 );
  assert( pOp->p2<=(p->nMem-p->nCursor) );
  pOut = &p->aMem[pOp->p2];
  memAboutToChange(p, pOut);
  if( VdbeMemDynamic(pOut) ) sqlite3VdbeMemSetNull(pOut);
  pOut->flags = MEM_Int;
  return pOut;
}


/*
** Execute as much of a VDBE program as we can.
** This is the core of sqlite3_step().  
*/
int sqlite3VdbeExec(
  Vdbe *p                    /* The VDBE */
){

  Op *aOp = p->aOp;          /* Copy of p->aOp */
  Op *pOp = aOp;             /* Current operation */
  int rc = SQLITE_OK;        /* Value to return */
  sqlite3 *db = p->db;       /* The database */
  u8 resetSchemaOnFault = 0; /* Reset schema after an error if positive */
  u8 encoding = ENC(db);     /* The database encoding */
  int iCompare = 0;          /* Result of last OP_Compare operation */
  unsigned nVmStep = 0;      /* Number of virtual machine steps */
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
................................................................................
        }
      }
    }
    if( p->db->flags & SQLITE_VdbeTrace )  printf("VDBE Trace:\n");
  }
  sqlite3EndBenignMalloc();
#endif
  for(pOp=&aOp[p->pc]; rc==SQLITE_OK; pOp++){
    assert( pOp>=aOp && pOp<&aOp[p->nOp]);
    if( db->mallocFailed ) goto no_mem;
#ifdef VDBE_PROFILE
    start = sqlite3Hwtime();
#endif
    nVmStep++;

#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
    if( p->anExec ) p->anExec[(int)(pOp-aOp)]++;
#endif

    /* Only allow tracing if SQLITE_DEBUG is defined.
    */
#ifdef SQLITE_DEBUG
    if( db->flags & SQLITE_VdbeTrace ){
      sqlite3VdbePrintOp(stdout, (int)(pOp - aOp), pOp);
    }
#endif
      

    /* Check to see if we need to simulate an interrupt.  This only happens
    ** if we have a special test build.
    */
................................................................................
      sqlite3_interrupt_count--;
      if( sqlite3_interrupt_count==0 ){
        sqlite3_interrupt(db);
      }
    }
#endif
















    /* Sanity checking on other operands */
#ifdef SQLITE_DEBUG
    assert( pOp->opflags==sqlite3OpcodeProperty[pOp->opcode] );
    if( (pOp->opflags & OPFLG_IN1)!=0 ){
      assert( pOp->p1>0 );
      assert( pOp->p1<=(p->nMem-p->nCursor) );
      assert( memIsValid(&aMem[pOp->p1]) );
      assert( sqlite3VdbeCheckMemInvariants(&aMem[pOp->p1]) );
      REGISTER_TRACE(pOp->p1, &aMem[pOp->p1]);
    }
................................................................................
** opcode and the opcodes.c file is filled with an array of strings where
** each string is the symbolic name for the corresponding opcode.  If the
** case statement is followed by a comment of the form "/# same as ... #/"
** that comment is used to determine the particular value of the opcode.
**
** Other keywords in the comment that follows each case are used to
** construct the OPFLG_INITIALIZER value that initializes opcodeProperty[].
** Keywords include: in1, in2, in3, out2, out3.  See
** the mkopcodeh.awk script for additional information.
**
** Documentation about VDBE opcodes is generated by scanning this file
** for lines of that contain "Opcode:".  That line and all subsequent
** comment lines are used in the generation of the opcode.html documentation
** file.
**
................................................................................
**
** The P1 parameter is not actually used by this opcode.  However, it
** is sometimes set to 1 instead of 0 as a hint to the command-line shell
** that this Goto is the bottom of a loop and that the lines from P2 down
** to the current line should be indented for EXPLAIN output.
*/
case OP_Goto: {             /* jump */
jump_to_p2_and_check_for_interrupt:
  pOp = &aOp[pOp->p2 - 1];

  /* Opcodes that are used as the bottom of a loop (OP_Next, OP_Prev,
  ** OP_VNext, OP_RowSetNext, or OP_SorterNext) all jump here upon
  ** completion.  Check to see if sqlite3_interrupt() has been called
  ** or if the progress callback needs to be invoked. 
  **
  ** This code uses unstructured "goto" statements and does not look clean.
................................................................................
*/
case OP_Gosub: {            /* jump */
  assert( pOp->p1>0 && pOp->p1<=(p->nMem-p->nCursor) );
  pIn1 = &aMem[pOp->p1];
  assert( VdbeMemDynamic(pIn1)==0 );
  memAboutToChange(p, pIn1);
  pIn1->flags = MEM_Int;
  pIn1->u.i = (int)(pOp-aOp);
  REGISTER_TRACE(pOp->p1, pIn1);

  /* Most jump operations do a goto to this spot in order to update
  ** the pOp pointer. */
jump_to_p2:
  pOp = &aOp[pOp->p2 - 1];
  break;
}

/* Opcode:  Return P1 * * * *
**
** Jump to the next instruction after the address in register P1.  After
** the jump, register P1 becomes undefined.
*/
case OP_Return: {           /* in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags==MEM_Int );
  pOp = &aOp[pIn1->u.i];
  pIn1->flags = MEM_Undefined;
  break;
}

/* Opcode: InitCoroutine P1 P2 P3 * *
**
** Set up register P1 so that it will Yield to the coroutine
................................................................................
  assert( pOp->p1>0 &&  pOp->p1<=(p->nMem-p->nCursor) );
  assert( pOp->p2>=0 && pOp->p2<p->nOp );
  assert( pOp->p3>=0 && pOp->p3<p->nOp );
  pOut = &aMem[pOp->p1];
  assert( !VdbeMemDynamic(pOut) );
  pOut->u.i = pOp->p3 - 1;
  pOut->flags = MEM_Int;
  if( pOp->p2 ) goto jump_to_p2;
  break;
}

/* Opcode:  EndCoroutine P1 * * * *
**
** The instruction at the address in register P1 is a Yield.
** Jump to the P2 parameter of that Yield.
................................................................................
  VdbeOp *pCaller;
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags==MEM_Int );
  assert( pIn1->u.i>=0 && pIn1->u.i<p->nOp );
  pCaller = &aOp[pIn1->u.i];
  assert( pCaller->opcode==OP_Yield );
  assert( pCaller->p2>=0 && pCaller->p2<p->nOp );
  pOp = &aOp[pCaller->p2 - 1];
  pIn1->flags = MEM_Undefined;
  break;
}

/* Opcode:  Yield P1 P2 * * *
**
** Swap the program counter with the value in register P1.  This
................................................................................
*/
case OP_Yield: {            /* in1, jump */
  int pcDest;
  pIn1 = &aMem[pOp->p1];
  assert( VdbeMemDynamic(pIn1)==0 );
  pIn1->flags = MEM_Int;
  pcDest = (int)pIn1->u.i;
  pIn1->u.i = (int)(pOp - aOp);
  REGISTER_TRACE(pOp->p1, pIn1);
  pOp = &aOp[pcDest];
  break;
}

/* Opcode:  HaltIfNull  P1 P2 P3 P4 P5
** Synopsis:  if r[P3]=null halt
**
** Check the value in register P3.  If it is NULL then Halt using
................................................................................
** There is an implied "Halt 0 0 0" instruction inserted at the very end of
** every program.  So a jump past the last instruction of the program
** is the same as executing Halt.
*/
case OP_Halt: {
  const char *zType;
  const char *zLogFmt;
  VdbeFrame *pFrame;
  int pcx;

  pcx = (int)(pOp - aOp);
  if( pOp->p1==SQLITE_OK && p->pFrame ){
    /* Halt the sub-program. Return control to the parent frame. */
    pFrame = p->pFrame;
    p->pFrame = pFrame->pParent;
    p->nFrame--;
    sqlite3VdbeSetChanges(db, p->nChange);
    pcx = sqlite3VdbeFrameRestore(pFrame);
    lastRowid = db->lastRowid;
    if( pOp->p2==OE_Ignore ){
      /* Instruction pcx is the OP_Program that invoked the sub-program 
      ** currently being halted. If the p2 instruction of this OP_Halt
      ** instruction is set to OE_Ignore, then the sub-program is throwing
      ** an IGNORE exception. In this case jump to the address specified
      ** as the p2 of the calling OP_Program.  */
      pcx = p->aOp[pcx].p2-1;
    }
    aOp = p->aOp;
    aMem = p->aMem;
    pOp = &aOp[pcx];
    break;
  }
  p->rc = pOp->p1;
  p->errorAction = (u8)pOp->p2;
  p->pc = pcx;
  if( p->rc ){
    if( pOp->p5 ){
      static const char * const azType[] = { "NOT NULL", "UNIQUE", "CHECK",
                                             "FOREIGN KEY" };
      assert( pOp->p5>=1 && pOp->p5<=4 );
      testcase( pOp->p5==1 );
      testcase( pOp->p5==2 );
................................................................................
      sqlite3SetString(&p->zErrMsg, db, "%s constraint failed: %s", 
                       zType, pOp->p4.z);
    }else if( pOp->p4.z ){
      sqlite3SetString(&p->zErrMsg, db, "%s", pOp->p4.z);
    }else{
      sqlite3SetString(&p->zErrMsg, db, "%s constraint failed", zType);
    }
    sqlite3_log(pOp->p1, zLogFmt, pcx, p->zSql, p->zErrMsg);
  }
  rc = sqlite3VdbeHalt(p);
  assert( rc==SQLITE_BUSY || rc==SQLITE_OK || rc==SQLITE_ERROR );
  if( rc==SQLITE_BUSY ){
    p->rc = rc = SQLITE_BUSY;
  }else{
    assert( rc==SQLITE_OK || (p->rc&0xff)==SQLITE_CONSTRAINT );
    assert( rc==SQLITE_OK || db->nDeferredCons>0 || db->nDeferredImmCons>0 );
    rc = p->rc ? SQLITE_ERROR : SQLITE_DONE;
  }
  pOp = &aOp[pcx];
  goto vdbe_return;
}

/* Opcode: Integer P1 P2 * * *
** Synopsis: r[P2]=P1
**
** The 32-bit integer value P1 is written into register P2.
*/
case OP_Integer: {         /* out2 */
  pOut = out2Prerelease(p, pOp);
  pOut->u.i = pOp->p1;
  break;
}

/* Opcode: Int64 * P2 * P4 *
** Synopsis: r[P2]=P4
**
** P4 is a pointer to a 64-bit integer value.
** Write that value into register P2.
*/
case OP_Int64: {           /* out2 */
  pOut = out2Prerelease(p, pOp);
  assert( pOp->p4.pI64!=0 );
  pOut->u.i = *pOp->p4.pI64;
  break;
}

#ifndef SQLITE_OMIT_FLOATING_POINT
/* Opcode: Real * P2 * P4 *
** Synopsis: r[P2]=P4
**
** P4 is a pointer to a 64-bit floating point value.
** Write that value into register P2.
*/
case OP_Real: {            /* same as TK_FLOAT, out2 */
  pOut = out2Prerelease(p, pOp);
  pOut->flags = MEM_Real;
  assert( !sqlite3IsNaN(*pOp->p4.pReal) );
  pOut->u.r = *pOp->p4.pReal;
  break;
}
#endif

................................................................................
** Synopsis: r[P2]='P4'
**
** P4 points to a nul terminated UTF-8 string. This opcode is transformed 
** into a String opcode before it is executed for the first time.  During
** this transformation, the length of string P4 is computed and stored
** as the P1 parameter.
*/
case OP_String8: {         /* same as TK_STRING, out2 */
  assert( pOp->p4.z!=0 );
  pOut = out2Prerelease(p, pOp);
  pOp->opcode = OP_String;
  pOp->p1 = sqlite3Strlen30(pOp->p4.z);

#ifndef SQLITE_OMIT_UTF16
  if( encoding!=SQLITE_UTF8 ){
    rc = sqlite3VdbeMemSetStr(pOut, pOp->p4.z, -1, SQLITE_UTF8, SQLITE_STATIC);
    if( rc==SQLITE_TOOBIG ) goto too_big;
................................................................................
** The string value P4 of length P1 (bytes) is stored in register P2.
**
** If P5!=0 and the content of register P3 is greater than zero, then
** the datatype of the register P2 is converted to BLOB.  The content is
** the same sequence of bytes, it is merely interpreted as a BLOB instead
** of a string, as if it had been CAST.
*/
case OP_String: {          /* out2 */
  assert( pOp->p4.z!=0 );
  pOut = out2Prerelease(p, pOp);
  pOut->flags = MEM_Str|MEM_Static|MEM_Term;
  pOut->z = pOp->p4.z;
  pOut->n = pOp->p1;
  pOut->enc = encoding;
  UPDATE_MAX_BLOBSIZE(pOut);
  if( pOp->p5 ){
    assert( pOp->p3>0 );
................................................................................
** is less than P2 (typically P3 is zero) then only register P2 is
** set to NULL.
**
** If the P1 value is non-zero, then also set the MEM_Cleared flag so that
** NULL values will not compare equal even if SQLITE_NULLEQ is set on
** OP_Ne or OP_Eq.
*/
case OP_Null: {           /* out2 */
  int cnt;
  u16 nullFlag;
  pOut = out2Prerelease(p, pOp);
  cnt = pOp->p3-pOp->p2;
  assert( pOp->p3<=(p->nMem-p->nCursor) );
  pOut->flags = nullFlag = pOp->p1 ? (MEM_Null|MEM_Cleared) : MEM_Null;
  while( cnt>0 ){
    pOut++;
    memAboutToChange(p, pOut);
    sqlite3VdbeMemSetNull(pOut);
................................................................................

/* Opcode: Blob P1 P2 * P4 *
** Synopsis: r[P2]=P4 (len=P1)
**
** P4 points to a blob of data P1 bytes long.  Store this
** blob in register P2.
*/
case OP_Blob: {                /* out2 */
  assert( pOp->p1 <= SQLITE_MAX_LENGTH );
  pOut = out2Prerelease(p, pOp);
  sqlite3VdbeMemSetStr(pOut, pOp->p4.z, pOp->p1, 0, 0);
  pOut->enc = encoding;
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Variable P1 P2 * P4 *
................................................................................
** Synopsis: r[P2]=parameter(P1,P4)
**
** Transfer the values of bound parameter P1 into register P2
**
** If the parameter is named, then its name appears in P4.
** The P4 value is used by sqlite3_bind_parameter_name().
*/
case OP_Variable: {            /* out2 */
  Mem *pVar;       /* Value being transferred */

  assert( pOp->p1>0 && pOp->p1<=p->nVar );
  assert( pOp->p4.z==0 || pOp->p4.z==p->azVar[pOp->p1-1] );
  pVar = &p->aVar[pOp->p1 - 1];
  if( sqlite3VdbeMemTooBig(pVar) ){
    goto too_big;
  }
  pOut = out2Prerelease(p, pOp);
  sqlite3VdbeMemShallowCopy(pOut, pVar, MEM_Static);
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Move P1 P2 P3 * *
** Synopsis:  r[P2@P3]=r[P1@P3]
................................................................................
    sqlite3VdbeMemNulTerminate(&pMem[i]);
    REGISTER_TRACE(pOp->p1+i, &pMem[i]);
  }
  if( db->mallocFailed ) goto no_mem;

  /* Return SQLITE_ROW
  */
  p->pc = (int)(pOp - aOp) + 1;
  rc = SQLITE_ROW;
  goto vdbe_return;
}

/* Opcode: Concat P1 P2 P3 * *
** Synopsis: r[P3]=r[P2]+r[P1]
**
................................................................................
    apVal[i] = pArg;
    Deephemeralize(pArg);
    REGISTER_TRACE(pOp->p2+i, pArg);
  }

  assert( pOp->p4type==P4_FUNCDEF );
  ctx.pFunc = pOp->p4.pFunc;
  ctx.iOp = (int)(pOp - aOp);
  ctx.pVdbe = p;
  MemSetTypeFlag(ctx.pOut, MEM_Null);
  ctx.fErrorOrAux = 0;
  db->lastRowid = lastRowid;
  (*ctx.pFunc->xFunc)(&ctx, n, apVal); /* IMP: R-24505-23230 */
  lastRowid = db->lastRowid;  /* Remember rowid changes made by xFunc */

  /* If the function returned an error, throw an exception */
  if( ctx.fErrorOrAux ){
    if( ctx.isError ){
      sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3_value_text(ctx.pOut));
      rc = ctx.isError;
    }
    sqlite3VdbeDeleteAuxData(p, (int)(pOp - aOp), pOp->p1);
  }

  /* Copy the result of the function into register P3 */
  sqlite3VdbeChangeEncoding(ctx.pOut, encoding);
  if( sqlite3VdbeMemTooBig(ctx.pOut) ){
    goto too_big;
  }
................................................................................
    applyAffinity(pIn1, SQLITE_AFF_NUMERIC, encoding);
    VdbeBranchTaken((pIn1->flags&MEM_Int)==0, 2);
    if( (pIn1->flags & MEM_Int)==0 ){
      if( pOp->p2==0 ){
        rc = SQLITE_MISMATCH;
        goto abort_due_to_error;
      }else{
        goto jump_to_p2;

      }
    }
  }
  MemSetTypeFlag(pIn1, MEM_Int);
  break;
}

................................................................................
      if( pOp->p5 & SQLITE_STOREP2 ){
        pOut = &aMem[pOp->p2];
        MemSetTypeFlag(pOut, MEM_Null);
        REGISTER_TRACE(pOp->p2, pOut);
      }else{
        VdbeBranchTaken(2,3);
        if( pOp->p5 & SQLITE_JUMPIFNULL ){
          goto jump_to_p2;
        }
      }
      break;
    }
  }else{
    /* Neither operand is NULL.  Do a comparison. */
    affinity = pOp->p5 & SQLITE_AFF_MASK;
................................................................................
    case OP_Eq:    res = res==0;     break;
    case OP_Ne:    res = res!=0;     break;
    case OP_Lt:    res = res<0;      break;
    case OP_Le:    res = res<=0;     break;
    case OP_Gt:    res = res>0;      break;
    default:       res = res>=0;     break;
  }

  /* Undo any changes made by applyAffinity() to the input registers. */
  assert( (pIn1->flags & MEM_Dyn) == (flags1 & MEM_Dyn) );
  pIn1->flags = flags1;
  assert( (pIn3->flags & MEM_Dyn) == (flags3 & MEM_Dyn) );
  pIn3->flags = flags3;

  if( pOp->p5 & SQLITE_STOREP2 ){
    pOut = &aMem[pOp->p2];
    memAboutToChange(p, pOut);
    MemSetTypeFlag(pOut, MEM_Int);
    pOut->u.i = res;
    REGISTER_TRACE(pOp->p2, pOut);
  }else{
    VdbeBranchTaken(res!=0, (pOp->p5 & SQLITE_NULLEQ)?2:3);
    if( res ){
      goto jump_to_p2;
    }
  }





  break;
}

/* Opcode: Permutation * * * P4 *
**
** Set the permutation used by the OP_Compare operator to be the array
** of integers in P4.
................................................................................
**
** Jump to the instruction at address P1, P2, or P3 depending on whether
** in the most recent OP_Compare instruction the P1 vector was less than
** equal to, or greater than the P2 vector, respectively.
*/
case OP_Jump: {             /* jump */
  if( iCompare<0 ){
    VdbeBranchTaken(0,3); pOp = &aOp[pOp->p1 - 1];
  }else if( iCompare==0 ){
    VdbeBranchTaken(1,3); pOp = &aOp[pOp->p2 - 1];
  }else{
    VdbeBranchTaken(2,3); pOp = &aOp[pOp->p3 - 1];
  }
  break;
}

/* Opcode: And P1 P2 P3 * *
** Synopsis: r[P3]=(r[P1] && r[P2])
**
................................................................................
** All "once" flags are initially cleared whenever a prepared statement
** first begins to run.
*/
case OP_Once: {             /* jump */
  assert( pOp->p1<p->nOnceFlag );
  VdbeBranchTaken(p->aOnceFlag[pOp->p1]!=0, 2);
  if( p->aOnceFlag[pOp->p1] ){
    goto jump_to_p2;
  }else{
    p->aOnceFlag[pOp->p1] = 1;
  }
  break;
}

/* Opcode: If P1 P2 P3 * *
................................................................................
#else
    c = sqlite3VdbeRealValue(pIn1)!=0.0;
#endif
    if( pOp->opcode==OP_IfNot ) c = !c;
  }
  VdbeBranchTaken(c!=0, 2);
  if( c ){
    goto jump_to_p2;
  }
  break;
}

/* Opcode: IsNull P1 P2 * * *
** Synopsis:  if r[P1]==NULL goto P2
**
** Jump to P2 if the value in register P1 is NULL.
*/
case OP_IsNull: {            /* same as TK_ISNULL, jump, in1 */
  pIn1 = &aMem[pOp->p1];
  VdbeBranchTaken( (pIn1->flags & MEM_Null)!=0, 2);
  if( (pIn1->flags & MEM_Null)!=0 ){
    goto jump_to_p2;
  }
  break;
}

/* Opcode: NotNull P1 P2 * * *
** Synopsis: if r[P1]!=NULL goto P2
**
** Jump to P2 if the value in register P1 is not NULL.  
*/
case OP_NotNull: {            /* same as TK_NOTNULL, jump, in1 */
  pIn1 = &aMem[pOp->p1];
  VdbeBranchTaken( (pIn1->flags & MEM_Null)==0, 2);
  if( (pIn1->flags & MEM_Null)==0 ){
    goto jump_to_p2;
  }
  break;
}

/* Opcode: Column P1 P2 P3 P4 P5
** Synopsis:  r[P3]=PX
**
................................................................................
/* Opcode: Count P1 P2 * * *
** Synopsis: r[P2]=count()
**
** Store the number of entries (an integer value) in the table or index 
** opened by cursor P1 in register P2
*/
#ifndef SQLITE_OMIT_BTREECOUNT
case OP_Count: {         /* out2 */
  i64 nEntry;
  BtCursor *pCrsr;

  pCrsr = p->apCsr[pOp->p1]->pCursor;
  assert( pCrsr );
  nEntry = 0;  /* Not needed.  Only used to silence a warning. */
  rc = sqlite3BtreeCount(pCrsr, &nEntry);
  pOut = out2Prerelease(p, pOp);
  pOut->u.i = nEntry;
  break;
}
#endif

/* Opcode: Savepoint P1 * * P4 *
**
................................................................................
      int isTransaction = pSavepoint->pNext==0 && db->isTransactionSavepoint;
      if( isTransaction && p1==SAVEPOINT_RELEASE ){
        if( (rc = sqlite3VdbeCheckFk(p, 1))!=SQLITE_OK ){
          goto vdbe_return;
        }
        db->autoCommit = 1;
        if( sqlite3VdbeHalt(p)==SQLITE_BUSY ){
          p->pc = (int)(pOp - aOp);
          db->autoCommit = 0;
          p->rc = rc = SQLITE_BUSY;
          goto vdbe_return;
        }
        db->isTransactionSavepoint = 0;
        rc = p->rc;
      }else{
................................................................................
      sqlite3RollbackAll(db, SQLITE_ABORT_ROLLBACK);
      db->autoCommit = 1;
    }else if( (rc = sqlite3VdbeCheckFk(p, 1))!=SQLITE_OK ){
      goto vdbe_return;
    }else{
      db->autoCommit = (u8)desiredAutoCommit;
      if( sqlite3VdbeHalt(p)==SQLITE_BUSY ){
        p->pc = (int)(pOp - aOp);
        db->autoCommit = (u8)(1-desiredAutoCommit);
        p->rc = rc = SQLITE_BUSY;
        goto vdbe_return;
      }
    }
    assert( db->nStatement==0 );
    sqlite3CloseSavepoints(db);
................................................................................
    goto abort_due_to_error;
  }
  pBt = db->aDb[pOp->p1].pBt;

  if( pBt ){
    rc = sqlite3BtreeBeginTrans(pBt, pOp->p2);
    if( rc==SQLITE_BUSY ){
      p->pc = (int)(pOp - aOp);
      p->rc = rc = SQLITE_BUSY;
      goto vdbe_return;
    }
    if( rc!=SQLITE_OK ){
      goto abort_due_to_error;
    }

................................................................................
** the main database file and P1==1 is the database file used to store
** temporary tables.
**
** There must be a read-lock on the database (either a transaction
** must be started or there must be an open cursor) before
** executing this instruction.
*/
case OP_ReadCookie: {               /* out2 */
  int iMeta;
  int iDb;
  int iCookie;

  assert( p->bIsReader );
  iDb = pOp->p1;
  iCookie = pOp->p3;
  assert( pOp->p3<SQLITE_N_BTREE_META );
  assert( iDb>=0 && iDb<db->nDb );
  assert( db->aDb[iDb].pBt!=0 );
  assert( DbMaskTest(p->btreeMask, iDb) );

  sqlite3BtreeGetMeta(db->aDb[iDb].pBt, iCookie, (u32 *)&iMeta);
  pOut = out2Prerelease(p, pOp);
  pOut->u.i = iMeta;
  break;
}

/* Opcode: SetCookie P1 P2 P3 * *
**
** Write the content of register P3 (interpreted as an integer)
................................................................................
*/
case OP_SequenceTest: {
  VdbeCursor *pC;
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC->pSorter );
  if( (pC->seqCount++)==0 ){
    goto jump_to_p2;
  }
  break;
}

/* Opcode: OpenPseudo P1 P2 P3 * *
** Synopsis: P3 columns in r[P2]
**
................................................................................

    /* If the P3 value could not be converted into an integer without
    ** loss of information, then special processing is required... */
    if( (pIn3->flags & MEM_Int)==0 ){
      if( (pIn3->flags & MEM_Real)==0 ){
        /* If the P3 value cannot be converted into any kind of a number,
        ** then the seek is not possible, so jump to P2 */
        VdbeBranchTaken(1,2); goto jump_to_p2;
        break;
      }

      /* If the approximation iKey is larger than the actual real search
      ** term, substitute >= for > and < for <=. e.g. if the search term
      ** is 4.9 and the integer approximation 5:
      **
................................................................................
      */
      res = sqlite3BtreeEof(pC->pCursor);
    }
  }
  assert( pOp->p2>0 );
  VdbeBranchTaken(res!=0,2);
  if( res ){
    goto jump_to_p2;
  }
  break;
}

/* Opcode: Seek P1 P2 * * *
** Synopsis:  intkey=r[P2]
**
................................................................................
**
** See also: NotFound, Found, NotExists
*/
case OP_NoConflict:     /* jump, in3 */
case OP_NotFound:       /* jump, in3 */
case OP_Found: {        /* jump, in3 */
  int alreadyExists;
  int takeJump;
  int ii;
  VdbeCursor *pC;
  int res;
  char *pFree;
  UnpackedRecord *pIdxKey;
  UnpackedRecord r;
  char aTempRec[ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*4 + 7];
................................................................................
  assert( pC!=0 );
#ifdef SQLITE_DEBUG
  pC->seekOp = pOp->opcode;
#endif
  pIn3 = &aMem[pOp->p3];
  assert( pC->pCursor!=0 );
  assert( pC->isTable==0 );
  pFree = 0;
  if( pOp->p4.i>0 ){
    r.pKeyInfo = pC->pKeyInfo;
    r.nField = (u16)pOp->p4.i;
    r.aMem = pIn3;
    for(ii=0; ii<r.nField; ii++){
      assert( memIsValid(&r.aMem[ii]) );
      ExpandBlob(&r.aMem[ii]);
................................................................................
    );
    if( pIdxKey==0 ) goto no_mem;
    assert( pIn3->flags & MEM_Blob );
    ExpandBlob(pIn3);
    sqlite3VdbeRecordUnpack(pC->pKeyInfo, pIn3->n, pIn3->z, pIdxKey);
  }
  pIdxKey->default_rc = 0;
  takeJump = 0;
  if( pOp->opcode==OP_NoConflict ){
    /* For the OP_NoConflict opcode, take the jump if any of the
    ** input fields are NULL, since any key with a NULL will not
    ** conflict */
    for(ii=0; ii<pIdxKey->nField; ii++){
      if( pIdxKey->aMem[ii].flags & MEM_Null ){
        takeJump = 1;
        break;
      }
    }
  }
  rc = sqlite3BtreeMovetoUnpacked(pC->pCursor, pIdxKey, 0, 0, &res);

  sqlite3DbFree(db, pFree);

  if( rc!=SQLITE_OK ){
    break;
  }
  pC->seekResult = res;
  alreadyExists = (res==0);
  pC->nullRow = 1-alreadyExists;
  pC->deferredMoveto = 0;
  pC->cacheStatus = CACHE_STALE;
  if( pOp->opcode==OP_Found ){
    VdbeBranchTaken(alreadyExists!=0,2);
    if( alreadyExists ) goto jump_to_p2;
  }else{
    VdbeBranchTaken(takeJump||alreadyExists==0,2);
    if( takeJump || !alreadyExists ) goto jump_to_p2;
  }
  break;
}

/* Opcode: NotExists P1 P2 P3 * *
** Synopsis: intkey=r[P3]
**
................................................................................
  iKey = pIn3->u.i;
  rc = sqlite3BtreeMovetoUnpacked(pCrsr, 0, iKey, 0, &res);
  pC->movetoTarget = iKey;  /* Used by OP_Delete */
  pC->nullRow = 0;
  pC->cacheStatus = CACHE_STALE;
  pC->deferredMoveto = 0;
  VdbeBranchTaken(res!=0,2);



  pC->seekResult = res;
  if( res!=0 ) goto jump_to_p2;
  break;
}

/* Opcode: Sequence P1 P2 * * *
** Synopsis: r[P2]=cursor[P1].ctr++
**
** Find the next available sequence number for cursor P1.
** Write the sequence number into register P2.
** The sequence number on the cursor is incremented after this
** instruction.  
*/
case OP_Sequence: {           /* out2 */
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( p->apCsr[pOp->p1]!=0 );
  pOut = out2Prerelease(p, pOp);
  pOut->u.i = p->apCsr[pOp->p1]->seqCount++;
  break;
}


/* Opcode: NewRowid P1 P2 P3 * *
** Synopsis: r[P2]=rowid
................................................................................
** If P3>0 then P3 is a register in the root frame of this VDBE that holds 
** the largest previously generated record number. No new record numbers are
** allowed to be less than this value. When this value reaches its maximum, 
** an SQLITE_FULL error is generated. The P3 register is updated with the '
** generated record number. This P3 mechanism is used to help implement the
** AUTOINCREMENT feature.
*/
case OP_NewRowid: {           /* out2 */
  i64 v;                 /* The new rowid */
  VdbeCursor *pC;        /* Cursor of table to get the new rowid */
  int res;               /* Result of an sqlite3BtreeLast() */
  int cnt;               /* Counter to limit the number of searches */
  Mem *pMem;             /* Register holding largest rowid for AUTOINCREMENT */
  VdbeFrame *pFrame;     /* Root frame of VDBE */

  v = 0;
  res = 0;
  pOut = out2Prerelease(p, pOp);
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  if( NEVER(pC->pCursor==0) ){
    /* The zero initialization above is all that is needed */
  }else{
    /* The next rowid or record number (different terms for the same
................................................................................
  assert( isSorter(pC) );
  assert( pOp->p4type==P4_INT32 );
  pIn3 = &aMem[pOp->p3];
  nKeyCol = pOp->p4.i;
  res = 0;
  rc = sqlite3VdbeSorterCompare(pC, pIn3, nKeyCol, &res);
  VdbeBranchTaken(res!=0,2);
  if( res ) goto jump_to_p2;


  break;
};

/* Opcode: SorterData P1 P2 P3 * *
** Synopsis: r[P2]=data
**
** Write into register P2 the current sorter data for sorter cursor P1.
................................................................................
** Store in register P2 an integer which is the key of the table entry that
** P1 is currently point to.
**
** P1 can be either an ordinary table or a virtual table.  There used to
** be a separate OP_VRowid opcode for use with virtual tables, but this
** one opcode now works for both table types.
*/
case OP_Rowid: {                 /* out2 */
  VdbeCursor *pC;
  i64 v;
  sqlite3_vtab *pVtab;
  const sqlite3_module *pModule;

  pOut = out2Prerelease(p, pOp);
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  assert( pC->pseudoTableReg==0 || pC->nullRow );
  if( pC->nullRow ){
    pOut->flags = MEM_Null;
    break;
................................................................................
  pC->cacheStatus = CACHE_STALE;
  pC->seekResult = pOp->p3;
#ifdef SQLITE_DEBUG
  pC->seekOp = OP_Last;
#endif
  if( pOp->p2>0 ){
    VdbeBranchTaken(res!=0,2);
    if( res ) goto jump_to_p2;
  }
  break;
}


/* Opcode: Sort P1 P2 * * *
**
................................................................................
    rc = sqlite3BtreeFirst(pCrsr, &res);
    pC->deferredMoveto = 0;
    pC->cacheStatus = CACHE_STALE;
  }
  pC->nullRow = (u8)res;
  assert( pOp->p2>0 && pOp->p2<p->nOp );
  VdbeBranchTaken(res!=0,2);
  if( res ) goto jump_to_p2;


  break;
}

/* Opcode: Next P1 P2 P3 P4 P5
**
** Advance cursor P1 so that it points to the next key/data pair in its
** table or index.  If there are no more key/value pairs then fall through
................................................................................

  rc = pOp->p4.xAdvance(pC->pCursor, &res);
next_tail:
  pC->cacheStatus = CACHE_STALE;
  VdbeBranchTaken(res==0,2);
  if( res==0 ){
    pC->nullRow = 0;

    p->aCounter[pOp->p5]++;
#ifdef SQLITE_TEST
    sqlite3_search_count++;
#endif
    goto jump_to_p2_and_check_for_interrupt;
  }else{
    pC->nullRow = 1;
  }
  goto check_for_interrupt;
}

/* Opcode: IdxInsert P1 P2 P3 * P5
................................................................................
**
** Write into register P2 an integer which is the last entry in the record at
** the end of the index key pointed to by cursor P1.  This integer should be
** the rowid of the table entry to which this index entry points.
**
** See also: Rowid, MakeRecord.
*/
case OP_IdxRowid: {              /* out2 */
  BtCursor *pCrsr;
  VdbeCursor *pC;
  i64 rowid;

  pOut = out2Prerelease(p, pOp);
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  pCrsr = pC->pCursor;
  assert( pCrsr!=0 );
  pOut->flags = MEM_Null;
  assert( pC->isTable==0 );
................................................................................
    assert( pOp->opcode==OP_IdxLE || pOp->opcode==OP_IdxLT );
    res = -res;
  }else{
    assert( pOp->opcode==OP_IdxGE || pOp->opcode==OP_IdxGT );
    res++;
  }
  VdbeBranchTaken(res>0,2);
  if( res>0 ) goto jump_to_p2;


  break;
}

/* Opcode: Destroy P1 P2 P3 * *
**
** Delete an entire database table or index whose root page in the database
** file is given by P1.
................................................................................
** is stored in register P2.  If no page 
** movement was required (because the table being dropped was already 
** the last one in the database) then a zero is stored in register P2.
** If AUTOVACUUM is disabled then a zero is stored in register P2.
**
** See also: Clear
*/
case OP_Destroy: {     /* out2 */
  int iMoved;
  int iDb;

  assert( p->readOnly==0 );
  pOut = out2Prerelease(p, pOp);
  pOut->flags = MEM_Null;
  if( db->nVdbeRead > db->nVDestroy+1 ){
    rc = SQLITE_LOCKED;
    p->errorAction = OE_Abort;
  }else{
    iDb = pOp->p3;
    assert( DbMaskTest(p->btreeMask, iDb) );
................................................................................
** Allocate a new index in the main database file if P1==0 or in the
** auxiliary database file if P1==1 or in an attached database if
** P1>1.  Write the root page number of the new table into
** register P2.
**
** See documentation on OP_CreateTable for additional information.
*/
case OP_CreateIndex:            /* out2 */
case OP_CreateTable: {          /* out2 */
  int pgno;
  int flags;
  Db *pDb;

  pOut = out2Prerelease(p, pOp);
  pgno = 0;
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( DbMaskTest(p->btreeMask, pOp->p1) );
  assert( p->readOnly==0 );
  pDb = &db->aDb[pOp->p1];
  assert( pDb->pBt!=0 );
  if( pOp->opcode==OP_CreateTable ){
................................................................................

  pIn1 = &aMem[pOp->p1];
  if( (pIn1->flags & MEM_RowSet)==0 
   || sqlite3RowSetNext(pIn1->u.pRowSet, &val)==0
  ){
    /* The boolean index is empty */
    sqlite3VdbeMemSetNull(pIn1);

    VdbeBranchTaken(1,2);
    goto jump_to_p2_and_check_for_interrupt;
  }else{
    /* A value was pulled from the index */

    VdbeBranchTaken(0,2);
    sqlite3VdbeMemSetInt64(&aMem[pOp->p3], val);
  }
  goto check_for_interrupt;
}

/* Opcode: RowSetTest P1 P2 P3 P4
** Synopsis: if r[P3] in rowset(P1) goto P2
**
................................................................................
  }

  assert( pOp->p4type==P4_INT32 );
  assert( iSet==-1 || iSet>=0 );
  if( iSet ){
    exists = sqlite3RowSetTest(pIn1->u.pRowSet, iSet, pIn3->u.i);
    VdbeBranchTaken(exists!=0,2);
    if( exists ) goto jump_to_p2;



  }
  if( iSet>=0 ){
    sqlite3RowSetInsert(pIn1->u.pRowSet, pIn3->u.i);
  }
  break;
}

................................................................................
    sqlite3VdbeMemRelease(pRt);
    pRt->flags = MEM_Frame;
    pRt->u.pFrame = pFrame;

    pFrame->v = p;
    pFrame->nChildMem = nMem;
    pFrame->nChildCsr = pProgram->nCsr;
    pFrame->pc = (int)(pOp - aOp);
    pFrame->aMem = p->aMem;
    pFrame->nMem = p->nMem;
    pFrame->apCsr = p->apCsr;
    pFrame->nCursor = p->nCursor;
    pFrame->aOp = p->aOp;
    pFrame->nOp = p->nOp;
    pFrame->token = pProgram->token;
................................................................................
      pMem->flags = MEM_Undefined;
      pMem->db = db;
    }
  }else{
    pFrame = pRt->u.pFrame;
    assert( pProgram->nMem+pProgram->nCsr==pFrame->nChildMem );
    assert( pProgram->nCsr==pFrame->nChildCsr );
    assert( (int)(pOp - aOp)==pFrame->pc );
  }

  p->nFrame++;
  pFrame->pParent = p->pFrame;
  pFrame->lastRowid = lastRowid;
  pFrame->nChange = p->nChange;
  pFrame->nDbChange = p->db->nChange;
................................................................................
  p->aOp = aOp = pProgram->aOp;
  p->nOp = pProgram->nOp;
  p->aOnceFlag = (u8 *)&p->apCsr[p->nCursor];
  p->nOnceFlag = pProgram->nOnce;
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
  p->anExec = 0;
#endif
  pOp = &aOp[-1];
  memset(p->aOnceFlag, 0, p->nOnceFlag);

  break;
}

/* Opcode: Param P1 P2 * * *
**
................................................................................
** address space. This is used by trigger programs to access the new.* 
** and old.* values.
**
** The address of the cell in the parent frame is determined by adding
** the value of the P1 argument to the value of the P1 argument to the
** calling OP_Program instruction.
*/
case OP_Param: {           /* out2 */
  VdbeFrame *pFrame;
  Mem *pIn;
  pOut = out2Prerelease(p, pOp);
  pFrame = p->pFrame;
  pIn = &pFrame->aMem[pOp->p1 + pFrame->aOp[pFrame->pc].p1];   
  sqlite3VdbeMemShallowCopy(pOut, pIn, MEM_Ephem);
  break;
}

#endif /* #ifndef SQLITE_OMIT_TRIGGER */
................................................................................
** is zero (the one that counts deferred constraint violations). If P1 is
** zero, the jump is taken if the statement constraint-counter is zero
** (immediate foreign key constraint violations).
*/
case OP_FkIfZero: {         /* jump */
  if( pOp->p1 ){
    VdbeBranchTaken(db->nDeferredCons==0 && db->nDeferredImmCons==0, 2);
    if( db->nDeferredCons==0 && db->nDeferredImmCons==0 ) goto jump_to_p2;
  }else{
    VdbeBranchTaken(p->nFkConstraint==0 && db->nDeferredImmCons==0, 2);
    if( p->nFkConstraint==0 && db->nDeferredImmCons==0 ) goto jump_to_p2;
  }
  break;
}
#endif /* #ifndef SQLITE_OMIT_FOREIGN_KEY */

#ifndef SQLITE_OMIT_AUTOINCREMENT
/* Opcode: MemMax P1 P2 * * *
................................................................................
** If the initial value of register P1 is less than 1, then the
** value is unchanged and control passes through to the next instruction.
*/
case OP_IfPos: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  VdbeBranchTaken( pIn1->u.i>0, 2);
  if( pIn1->u.i>0 ) goto jump_to_p2;


  break;
}

/* Opcode: IfNeg P1 P2 P3 * *
** Synopsis: r[P1]+=P3, if r[P1]<0 goto P2
**
** Register P1 must contain an integer.  Add literal P3 to the value in
................................................................................
** register P1 then if the value of register P1 is less than zero, jump to P2. 
*/
case OP_IfNeg: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  pIn1->u.i += pOp->p3;
  VdbeBranchTaken(pIn1->u.i<0, 2);
  if( pIn1->u.i<0 ) goto jump_to_p2;


  break;
}

/* Opcode: IfNotZero P1 P2 P3 * *
** Synopsis: if r[P1]!=0 then r[P1]+=P3, goto P2
**
** Register P1 must contain an integer.  If the content of register P1 is
................................................................................
*/
case OP_IfNotZero: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  VdbeBranchTaken(pIn1->u.i<0, 2);
  if( pIn1->u.i ){
     pIn1->u.i += pOp->p3;
     goto jump_to_p2;
  }
  break;
}

/* Opcode: DecrJumpZero P1 P2 * * *
** Synopsis: if (--r[P1])==0 goto P2
**
................................................................................
** then jump to P2 if the new value is exactly zero.
*/
case OP_DecrJumpZero: {      /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  pIn1->u.i--;
  VdbeBranchTaken(pIn1->u.i==0, 2);
  if( pIn1->u.i==0 ) goto jump_to_p2;


  break;
}


/* Opcode: JumpZeroIncr P1 P2 * * *
** Synopsis: if (r[P1]++)==0 ) goto P2
**
................................................................................
** zero, then jump to P2.  Increment register P1 regardless of whether or
** not the jump is taken.
*/
case OP_JumpZeroIncr: {        /* jump, in1 */
  pIn1 = &aMem[pOp->p1];
  assert( pIn1->flags&MEM_Int );
  VdbeBranchTaken(pIn1->u.i==0, 2);
  if( (pIn1->u.i++)==0 ) goto jump_to_p2;


  break;
}

/* Opcode: AggStep * P2 P3 P4 P5
** Synopsis: accum=r[P3] step(r[P2@P5])
**
** Execute the step function for an aggregate.  The
................................................................................
  assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
  ctx.pMem = pMem = &aMem[pOp->p3];
  pMem->n++;
  sqlite3VdbeMemInit(&t, db, MEM_Null);
  ctx.pOut = &t;
  ctx.isError = 0;
  ctx.pVdbe = p;
  ctx.iOp = (int)(pOp - aOp);
  ctx.skipFlag = 0;
  (ctx.pFunc->xStep)(&ctx, n, apVal); /* IMP: R-24505-23230 */
  if( ctx.isError ){
    sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3_value_text(&t));
    rc = ctx.isError;
  }
  if( ctx.skipFlag ){
................................................................................
** modes (delete, truncate, persist, off and memory), this is a simple
** operation. No IO is required.
**
** If changing into or out of WAL mode the procedure is more complicated.
**
** Write a string containing the final journal-mode to register P2.
*/
case OP_JournalMode: {    /* out2 */
  Btree *pBt;                     /* Btree to change journal mode of */
  Pager *pPager;                  /* Pager associated with pBt */
  int eNew;                       /* New journal mode */
  int eOld;                       /* The old journal mode */
#ifndef SQLITE_OMIT_WAL
  const char *zFilename;          /* Name of database file for pPager */
#endif

  pOut = out2Prerelease(p, pOp);
  eNew = pOp->p3;
  assert( eNew==PAGER_JOURNALMODE_DELETE 
       || eNew==PAGER_JOURNALMODE_TRUNCATE 
       || eNew==PAGER_JOURNALMODE_PERSIST 
       || eNew==PAGER_JOURNALMODE_OFF
       || eNew==PAGER_JOURNALMODE_MEMORY
       || eNew==PAGER_JOURNALMODE_WAL
................................................................................
  assert( pOp->p1>=0 && pOp->p1<db->nDb );
  assert( DbMaskTest(p->btreeMask, pOp->p1) );
  assert( p->readOnly==0 );
  pBt = db->aDb[pOp->p1].pBt;
  rc = sqlite3BtreeIncrVacuum(pBt);
  VdbeBranchTaken(rc==SQLITE_DONE,2);
  if( rc==SQLITE_DONE ){

    rc = SQLITE_OK;
    goto jump_to_p2;
  }
  break;
}
#endif

/* Opcode: Expire P1 * * * *
**
................................................................................

  /* Grab the index number and argc parameters */
  assert( (pQuery->flags&MEM_Int)!=0 && pArgc->flags==MEM_Int );
  nArg = (int)pArgc->u.i;
  iQuery = (int)pQuery->u.i;

  /* Invoke the xFilter method */

  res = 0;
  apArg = p->apArg;
  for(i = 0; i<nArg; i++){
    apArg[i] = &pArgc[i+1];
  }

  rc = pModule->xFilter(pVtabCursor, iQuery, pOp->p4.z, nArg, apArg);
  sqlite3VtabImportErrmsg(p, pVtab);
  if( rc==SQLITE_OK ){
    res = pModule->xEof(pVtabCursor);
  }
  pCur->nullRow = 0;
  VdbeBranchTaken(res!=0,2);
  if( res ) goto jump_to_p2;





  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VColumn P1 P2 P3 * *
** Synopsis: r[P3]=vcolumn(P2)
................................................................................
  sqlite3VtabImportErrmsg(p, pVtab);
  if( rc==SQLITE_OK ){
    res = pModule->xEof(pCur->pVtabCursor);
  }
  VdbeBranchTaken(!res,2);
  if( !res ){
    /* If there is data, jump to P2 */
    goto jump_to_p2_and_check_for_interrupt;
  }
  goto check_for_interrupt;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VRename P1 * * P4 *
................................................................................
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef  SQLITE_OMIT_PAGER_PRAGMAS
/* Opcode: Pagecount P1 P2 * * *
**
** Write the current number of pages in database P1 to memory cell P2.
*/
case OP_Pagecount: {            /* out2 */
  pOut = out2Prerelease(p, pOp);
  pOut->u.i = sqlite3BtreeLastPage(db->aDb[pOp->p1].pBt);
  break;
}
#endif


#ifndef  SQLITE_OMIT_PAGER_PRAGMAS
................................................................................
**
** Try to set the maximum page count for database P1 to the value in P3.
** Do not let the maximum page count fall below the current page count and
** do not change the maximum page count value if P3==0.
**
** Store the maximum page count after the change in register P2.
*/
case OP_MaxPgcnt: {            /* out2 */
  unsigned int newMax;
  Btree *pBt;

  pOut = out2Prerelease(p, pOp);
  pBt = db->aDb[pOp->p1].pBt;
  newMax = 0;
  if( pOp->p3 ){
    newMax = sqlite3BtreeLastPage(pBt);
    if( newMax < (unsigned)pOp->p3 ) newMax = (unsigned)pOp->p3;
  }
  pOut->u.i = sqlite3BtreeMaxPageCount(pBt, newMax);
................................................................................
**
** If P2 is not zero, jump to instruction P2.
*/
case OP_Init: {          /* jump */
  char *zTrace;
  char *z;




#ifndef SQLITE_OMIT_TRACE
  if( db->xTrace
   && !p->doingRerun
   && (zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql))!=0
  ){
    z = sqlite3VdbeExpandSql(p, zTrace);
    db->xTrace(db->pTraceArg, z);
................................................................................
  if( (db->flags & SQLITE_SqlTrace)!=0
   && (zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql))!=0
  ){
    sqlite3DebugPrintf("SQL-trace: %s\n", zTrace);
  }
#endif /* SQLITE_DEBUG */
#endif /* SQLITE_OMIT_TRACE */
  if( pOp->p2 ) goto jump_to_p2;
  break;
}


/* Opcode: Noop * * * * *
**
** Do nothing.  This instruction is often useful as a jump
................................................................................

    /* The following code adds nothing to the actual functionality
    ** of the program.  It is only here for testing and debugging.
    ** On the other hand, it does burn CPU cycles every time through
    ** the evaluator loop.  So we can leave it out when NDEBUG is defined.
    */
#ifndef NDEBUG
    assert( pOp>=&aOp[-1] && pOp<&aOp[p->nOp] );

#ifdef SQLITE_DEBUG
    if( db->flags & SQLITE_VdbeTrace ){
      if( rc!=0 ) printf("rc=%d\n",rc);
      if( pOp->opflags & (OPFLG_OUT2) ){
        registerTrace(pOp->p2, &aMem[pOp->p2]);
      }
      if( pOp->opflags & OPFLG_OUT3 ){
        registerTrace(pOp->p3, &aMem[pOp->p3]);
      }
    }
#endif  /* SQLITE_DEBUG */
................................................................................
  ** an error of some kind.
  */
vdbe_error_halt:
  assert( rc );
  p->rc = rc;
  testcase( sqlite3GlobalConfig.xLog!=0 );
  sqlite3_log(rc, "statement aborts at %d: [%s] %s", 
                   (int)(pOp - aOp), p->zSql, p->zErrMsg);
  sqlite3VdbeHalt(p);
  if( rc==SQLITE_IOERR_NOMEM ) db->mallocFailed = 1;
  rc = SQLITE_ERROR;
  if( resetSchemaOnFault>0 ){
    sqlite3ResetOneSchema(db, resetSchemaOnFault-1);
  }

Changes to src/vdbesort.c.

878
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880
881
882
883
884

885
886
887
888
889
890
891
892
893
894
895
      if( s2>7 ){
        res = +1;
      }else if( s1>7 ){
        res = -1;
      }else{
        res = s1 - s2;
      }


      if( res>0 ){
        if( *v1 & 0x80 ) res = -1;
      }else if( res<0 ){
        if( *v2 & 0x80 ) res = +1;
      }
    }
  }

  if( res==0 ){
    if( pTask->pSorter->pKeyInfo->nField>1 ){







>



|







878
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880
881
882
883
884
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887
888
889
890
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892
893
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896
      if( s2>7 ){
        res = +1;
      }else if( s1>7 ){
        res = -1;
      }else{
        res = s1 - s2;
      }
      assert( res!=0 );

      if( res>0 ){
        if( *v1 & 0x80 ) res = -1;
      }else{
        if( *v2 & 0x80 ) res = +1;
      }
    }
  }

  if( res==0 ){
    if( pTask->pSorter->pKeyInfo->nField>1 ){

Changes to src/wal.c.

1726
1727
1728
1729
1730
1731
1732








1733
1734
1735
1736
1737
1738
1739
    ** safe to write into the database.  Frames beyond mxSafeFrame might
    ** overwrite database pages that are in use by active readers and thus
    ** cannot be backfilled from the WAL.
    */
    mxSafeFrame = pWal->hdr.mxFrame;
    mxPage = pWal->hdr.nPage;
    for(i=1; i<WAL_NREADER; i++){








      u32 y = pInfo->aReadMark[i];
      if( mxSafeFrame>y ){
        assert( y<=pWal->hdr.mxFrame );
        rc = walBusyLock(pWal, xBusy, pBusyArg, WAL_READ_LOCK(i), 1);
        if( rc==SQLITE_OK ){
          pInfo->aReadMark[i] = (i==1 ? mxSafeFrame : READMARK_NOT_USED);
          walUnlockExclusive(pWal, WAL_READ_LOCK(i), 1);







>
>
>
>
>
>
>
>







1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
    ** safe to write into the database.  Frames beyond mxSafeFrame might
    ** overwrite database pages that are in use by active readers and thus
    ** cannot be backfilled from the WAL.
    */
    mxSafeFrame = pWal->hdr.mxFrame;
    mxPage = pWal->hdr.nPage;
    for(i=1; i<WAL_NREADER; i++){
      /* Thread-sanitizer reports that the following is an unsafe read,
      ** as some other thread may be in the process of updating the value
      ** of the aReadMark[] slot. The assumption here is that if that is
      ** happening, the other client may only be increasing the value,
      ** not decreasing it. So assuming either that either the "old" or
      ** "new" version of the value is read, and not some arbitrary value
      ** that would never be written by a real client, things are still 
      ** safe.  */
      u32 y = pInfo->aReadMark[i];
      if( mxSafeFrame>y ){
        assert( y<=pWal->hdr.mxFrame );
        rc = walBusyLock(pWal, xBusy, pBusyArg, WAL_READ_LOCK(i), 1);
        if( rc==SQLITE_OK ){
          pInfo->aReadMark[i] = (i==1 ? mxSafeFrame : READMARK_NOT_USED);
          walUnlockExclusive(pWal, WAL_READ_LOCK(i), 1);

Changes to src/where.c.

1528
1529
1530
1531
1532
1533
1534
1535
1536
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1538
1539
1540
1541
1542
....
1802
1803
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1805
1806
1807
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1809
1810
1811
1812
1813
1814
1815
1816
  for(i=0; i<pList->nExpr; i++){
    Expr *p = sqlite3ExprSkipCollate(pList->a[i].pExpr);
    if( p->op==TK_COLUMN
     && p->iColumn==pIdx->aiColumn[iCol]
     && p->iTable==iBase
    ){
      CollSeq *pColl = sqlite3ExprCollSeq(pParse, pList->a[i].pExpr);
      if( ALWAYS(pColl) && 0==sqlite3StrICmp(pColl->zName, zColl) ){
        return i;
      }
    }
  }

  return -1;
}
................................................................................
      testcase( iCol==BMS-1 );
      testcase( iCol==BMS );
      if( (idxCols & cMask)==0 ){
        Expr *pX = pTerm->pExpr;
        idxCols |= cMask;
        pIdx->aiColumn[n] = pTerm->u.leftColumn;
        pColl = sqlite3BinaryCompareCollSeq(pParse, pX->pLeft, pX->pRight);
        pIdx->azColl[n] = ALWAYS(pColl) ? pColl->zName : "BINARY";
        n++;
      }
    }
  }
  assert( (u32)n==pLoop->u.btree.nEq );

  /* Add additional columns needed to make the automatic index into







|







 







|







1528
1529
1530
1531
1532
1533
1534
1535
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1539
1540
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1542
....
1802
1803
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1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
  for(i=0; i<pList->nExpr; i++){
    Expr *p = sqlite3ExprSkipCollate(pList->a[i].pExpr);
    if( p->op==TK_COLUMN
     && p->iColumn==pIdx->aiColumn[iCol]
     && p->iTable==iBase
    ){
      CollSeq *pColl = sqlite3ExprCollSeq(pParse, pList->a[i].pExpr);
      if( pColl && 0==sqlite3StrICmp(pColl->zName, zColl) ){
        return i;
      }
    }
  }

  return -1;
}
................................................................................
      testcase( iCol==BMS-1 );
      testcase( iCol==BMS );
      if( (idxCols & cMask)==0 ){
        Expr *pX = pTerm->pExpr;
        idxCols |= cMask;
        pIdx->aiColumn[n] = pTerm->u.leftColumn;
        pColl = sqlite3BinaryCompareCollSeq(pParse, pX->pLeft, pX->pRight);
        pIdx->azColl[n] = pColl ? pColl->zName : "BINARY";
        n++;
      }
    }
  }
  assert( (u32)n==pLoop->u.btree.nEq );

  /* Add additional columns needed to make the automatic index into

Changes to test/autoindex1.test.

508
509
510
511
512
513
514

515






516
  CREATE VIEW agg2 AS SELECT a, sum(b) AS m FROM t2 GROUP BY a;
  EXPLAIN QUERY PLAN
  SELECT t1.z, agg2.m
    FROM t1 JOIN agg2 ON t1.y=agg2.m
   WHERE t1.x IN (1,2,3);
} {/USING AUTOMATIC COVERING INDEX/}









finish_test







>
|
>
>
>
>
>
>

508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
  CREATE VIEW agg2 AS SELECT a, sum(b) AS m FROM t2 GROUP BY a;
  EXPLAIN QUERY PLAN
  SELECT t1.z, agg2.m
    FROM t1 JOIN agg2 ON t1.y=agg2.m
   WHERE t1.x IN (1,2,3);
} {/USING AUTOMATIC COVERING INDEX/}

# 2015-04-15:  A NULL CollSeq pointer in automatic index creation.
#
do_execsql_test autoindex1-920 {
  CREATE TABLE t920(x);
  INSERT INTO t920 VALUES(3),(4),(5);
  SELECT * FROM t920,(SELECT 0 FROM t920),(VALUES(9)) WHERE 5 IN (x);
} {5 0 9 5 0 9 5 0 9}

finish_test

Changes to test/collate1.test.

381
382
383
384
385
386
387
388
389












390



  INSERT INTO c1 VALUES(2, 'abb');
  INSERT INTO c1 VALUES(3, 'wxz');
  INSERT INTO c1 VALUES(4, 'WXY');
  SELECT x, y FROM c1 ORDER BY y COLLATE """""""";
} {2 abb 1 ABC 4 WXY 3 wxz}

finish_test























|
|
>
>
>
>
>
>
>
>
>
>
>
>

>
>
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404

  INSERT INTO c1 VALUES(2, 'abb');
  INSERT INTO c1 VALUES(3, 'wxz');
  INSERT INTO c1 VALUES(4, 'WXY');
  SELECT x, y FROM c1 ORDER BY y COLLATE """""""";
} {2 abb 1 ABC 4 WXY 3 wxz}

# 2015-04-15:  Nested COLLATE operators
#
do_execsql_test 7.0 {
   SELECT 'abc' UNION ALL SELECT 'DEF'
    ORDER BY 1 COLLATE nocase COLLATE nocase COLLATE nocase COLLATE nocase;
} {abc DEF}
do_execsql_test 7.1 {
   SELECT 'abc' UNION ALL SELECT 'DEF'
    ORDER BY 1 COLLATE nocase COLLATE nocase COLLATE nocase COLLATE binary;
} {DEF abc}
do_execsql_test 7.2 {
   SELECT 'abc' UNION ALL SELECT 'DEF'
    ORDER BY 1 COLLATE binary COLLATE binary COLLATE binary COLLATE nocase;
} {abc DEF}


finish_test

Changes to test/collate3.test.

28
29
30
31
32
33
34
35
36
37
38
39
40
41





42
43
44
45
46
47
48

#
# These tests ensure that when a user executes a statement with an 
# unknown collation sequence an error is returned.
#
do_test collate3-1.0 {
  execsql {
    CREATE TABLE collate3t1(c1);
  }
} {}
do_test collate3-1.1 {
  catchsql {
    SELECT * FROM collate3t1 ORDER BY 1 collate garbage;
  }





} {1 {no such collation sequence: garbage}}
do_test collate3-1.2 {
  catchsql {
    CREATE TABLE collate3t2(c1 collate garbage);
  }
} {1 {no such collation sequence: garbage}}
do_test collate3-1.3 {







|






>
>
>
>
>







28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

#
# These tests ensure that when a user executes a statement with an 
# unknown collation sequence an error is returned.
#
do_test collate3-1.0 {
  execsql {
    CREATE TABLE collate3t1(c1 UNIQUE);
  }
} {}
do_test collate3-1.1 {
  catchsql {
    SELECT * FROM collate3t1 ORDER BY 1 collate garbage;
  }
} {1 {no such collation sequence: garbage}}
do_test collate3-1.1.2 {
  catchsql {
    SELECT DISTINCT c1 COLLATE garbage FROM collate3t1;
  }
} {1 {no such collation sequence: garbage}}
do_test collate3-1.2 {
  catchsql {
    CREATE TABLE collate3t2(c1 collate garbage);
  }
} {1 {no such collation sequence: garbage}}
do_test collate3-1.3 {

Changes to test/fts3snippet.test.

533
534
535
536
537
538
539



















540
541
542
543
} {{[one <b>two</b> three]}}
do_execsql_test 3.3 {
  SELECT snippet(t3) FROM t3 WHERE t3 MATCH 'three';
} {{[one two <b>three</b>]}}
do_execsql_test 3.4 {
  SELECT snippet(t3) FROM t3 WHERE t3 MATCH 'one OR two OR three';
} {{[<b>one</b> <b>two</b> <b>three</b>]}}




















set sqlite_fts3_enable_parentheses 0
finish_test








>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>




533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
} {{[one <b>two</b> three]}}
do_execsql_test 3.3 {
  SELECT snippet(t3) FROM t3 WHERE t3 MATCH 'three';
} {{[one two <b>three</b>]}}
do_execsql_test 3.4 {
  SELECT snippet(t3) FROM t3 WHERE t3 MATCH 'one OR two OR three';
} {{[<b>one</b> <b>two</b> <b>three</b>]}}

#-------------------------------------------------------------------------
# Request a snippet 0 tokens in size. This is always an empty string.
do_execsql_test 4.1 {
  CREATE VIRTUAL TABLE t4 USING fts4;
  INSERT INTO t4 VALUES('a b c d');
  SELECT snippet(t4, '[', ']', '...', 0, 0) FROM t4 WHERE t4 MATCH 'b';
} {{}}

do_test 4.2 {
  set x35 [string trim [string repeat "x " 35]]
  execsql "INSERT INTO t4 VALUES('$x35 E $x35 F $x35 G $x35');"
  llength [db one {
    SELECT snippet(t4, '', '', '', 0, 64) FROM t4 WHERE t4 MATCH 'E'
  }]
} {64}




set sqlite_fts3_enable_parentheses 0
finish_test

Changes to test/fts3tok1.test.

105
106
107
108
109
110
111










112
113
114
  CREATE VIRTUAL TABLE tX USING fts3tokenize(nosuchtokenizer);
} {1 {unknown tokenizer: nosuchtokenizer}}

do_catchsql_test 2.1 {
  CREATE VIRTUAL TABLE t4 USING fts3tokenize;
  SELECT * FROM t4;
} {1 {SQL logic error or missing database}}












finish_test







>
>
>
>
>
>
>
>
>
>



105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
  CREATE VIRTUAL TABLE tX USING fts3tokenize(nosuchtokenizer);
} {1 {unknown tokenizer: nosuchtokenizer}}

do_catchsql_test 2.1 {
  CREATE VIRTUAL TABLE t4 USING fts3tokenize;
  SELECT * FROM t4;
} {1 {SQL logic error or missing database}}

do_catchsql_test 2.2 {
  CREATE VIRTUAL TABLE t USING fts4(tokenize=simple""); 
} {0 {}}

ifcapable fts3_unicode {
  do_catchsql_test 2.3 {
    CREATE VIRTUAL TABLE u USING fts4(tokenize=unicode61""); 
  } {1 {unknown tokenizer}}
}


finish_test

Changes to test/hexlit.test.

105
106
107
108
109
110
111





112
113
114
} {0}

# Oversized hex literals are rejected
#
do_catchsql_test hexlist-400 {
  SELECT 0x10000000000000000;
} {1 {hex literal too big: 0x10000000000000000}}







finish_test







>
>
>
>
>



105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
} {0}

# Oversized hex literals are rejected
#
do_catchsql_test hexlist-400 {
  SELECT 0x10000000000000000;
} {1 {hex literal too big: 0x10000000000000000}}
do_catchsql_test hexlist-410 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(x);
  INSERT INTO t1 VALUES(1+0x10000000000000000);
} {1 {hex literal too big: 0x10000000000000000}}


finish_test

Changes to test/in.test.

611
612
613
614
615
616
617






618
619
620
621
622
623
do_test in-13.14 {
  execsql {
    CREATE INDEX i5 ON b(id);
    SELECT * FROM a WHERE id NOT IN (SELECT id FROM b);
  }
} {}








do_test in-13.X {
  db nullvalue ""
} {}

finish_test







>
>
>
>
>
>






611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
do_test in-13.14 {
  execsql {
    CREATE INDEX i5 ON b(id);
    SELECT * FROM a WHERE id NOT IN (SELECT id FROM b);
  }
} {}

do_test in-13.15 {
  catchsql {
    SELECT 0 WHERE (SELECT 0,0) OR (0 IN (1,2));
  }
} {1 {only a single result allowed for a SELECT that is part of an expression}}


do_test in-13.X {
  db nullvalue ""
} {}

finish_test

Changes to test/misc1.test.

634
635
636
637
638
639
640
641





642
#
do_catchsql_test misc1-21.1 {
  select''like''like''like#0;
} {1 {near "#0": syntax error}}
do_catchsql_test misc1-21.2 {
  VALUES(0,0x0MATCH#0;
} {1 {near ";": syntax error}}






finish_test








>
>
>
>
>

634
635
636
637
638
639
640
641
642
643
644
645
646
647
#
do_catchsql_test misc1-21.1 {
  select''like''like''like#0;
} {1 {near "#0": syntax error}}
do_catchsql_test misc1-21.2 {
  VALUES(0,0x0MATCH#0;
} {1 {near ";": syntax error}}

# 2015-04-15
do_execsql_test misc1-22.1 {
  SELECT ""+3 FROM (SELECT ""+5);
} {3}

finish_test

Changes to test/pragma.test.

747
748
749
750
751
752
753










754
755
756
757
758
759
760
            ORDER BY cid}
} [concat \
  {0 one INT 1 -1 0} \
  {1 two text 0 {} 0} \
  {2 three {VARCHAR(45, 65)} 0 'abcde' 0} \
  {3 four REAL 0 X'abcdef' 0} \
  {4 five {} 0 CURRENT_TIME 0} \










]
} ;# ifcapable schema_pragmas
# Miscellaneous tests
#
ifcapable schema_pragmas {
# EVIDENCE-OF: R-63500-32024 PRAGMA database.index_list(table-name);
# This pragma returns one row for each index associated with the given







>
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            ORDER BY cid}
} [concat \
  {0 one INT 1 -1 0} \
  {1 two text 0 {} 0} \
  {2 three {VARCHAR(45, 65)} 0 'abcde' 0} \
  {3 four REAL 0 X'abcdef' 0} \
  {4 five {} 0 CURRENT_TIME 0} \
]
do_test pragma-6.8 {
  execsql {
    CREATE TABLE t68(a,b,c,PRIMARY KEY(a,b,a,c));
    PRAGMA table_info(t68);
  }
} [concat \
  {0 a {} 0 {} 1} \
  {1 b {} 0 {} 2} \
  {2 c {} 0 {} 4} \
]
} ;# ifcapable schema_pragmas
# Miscellaneous tests
#
ifcapable schema_pragmas {
# EVIDENCE-OF: R-63500-32024 PRAGMA database.index_list(table-name);
# This pragma returns one row for each index associated with the given

Changes to test/printf2.test.

54
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} {314159}
do_execsql_test printf2-1.10 {
  SELECT printf('%lld',314159.2653);
} {314159}
do_execsql_test printf2-1.11 {
  SELECT printf('%lld%n',314159.2653,'hi');
} {314159}




# EVIDENCE-OF: R-17002-27534 The %z format is interchangeable with %s.
#
do_execsql_test printf2-1.12 {
  SELECT printf('%.*z',5,'abcdefghijklmnop');
} {abcde}
do_execsql_test printf2-1.13 {







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} {314159}
do_execsql_test printf2-1.10 {
  SELECT printf('%lld',314159.2653);
} {314159}
do_execsql_test printf2-1.11 {
  SELECT printf('%lld%n',314159.2653,'hi');
} {314159}
do_execsql_test printf2-1.12 {
  SELECT printf('%n',0);
} {{}}

# EVIDENCE-OF: R-17002-27534 The %z format is interchangeable with %s.
#
do_execsql_test printf2-1.12 {
  SELECT printf('%.*z',5,'abcdefghijklmnop');
} {abcde}
do_execsql_test printf2-1.13 {

Changes to test/select4.test.

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    SELECT x FROM t2
    UNION ALL
    SELECT x FROM t2
    EXCEPT
    SELECT x FROM t2
  }
} {1 {SELECTs to the left and right of UNION do not have the same number of result columns}}






do_test select4-12.1 {
  sqlite3 db2 :memory:
  catchsql {
    SELECT 1 UNION SELECT 2,3 UNION SELECT 4,5 ORDER BY 1;
  } db2
} {1 {SELECTs to the left and right of UNION do not have the same number of result columns}}
................................................................................
} {}
do_execsql_test select4-14.8 {
  SELECT * FROM t14 EXCEPT VALUES('a','b','c') EXCEPT VALUES(4,5,6)
} {1 2 3}
do_execsql_test select4-14.9 {
  SELECT * FROM t14 UNION ALL VALUES(3,2,1),(2,3,1),(1,2,3),(2,1,3);
} {1 2 3 4 5 6 3 2 1 2 3 1 1 2 3 2 1 3}








finish_test







>
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>

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    SELECT x FROM t2
    UNION ALL
    SELECT x FROM t2
    EXCEPT
    SELECT x FROM t2
  }
} {1 {SELECTs to the left and right of UNION do not have the same number of result columns}}
do_test select4-11.16 {
  catchsql {
    INSERT INTO t2(rowid) VALUES(2) UNION SELECT 3,4 UNION SELECT 5,6 ORDER BY 1;
  }
} {1 {SELECTs to the left and right of UNION do not have the same number of result columns}}

do_test select4-12.1 {
  sqlite3 db2 :memory:
  catchsql {
    SELECT 1 UNION SELECT 2,3 UNION SELECT 4,5 ORDER BY 1;
  } db2
} {1 {SELECTs to the left and right of UNION do not have the same number of result columns}}
................................................................................
} {}
do_execsql_test select4-14.8 {
  SELECT * FROM t14 EXCEPT VALUES('a','b','c') EXCEPT VALUES(4,5,6)
} {1 2 3}
do_execsql_test select4-14.9 {
  SELECT * FROM t14 UNION ALL VALUES(3,2,1),(2,3,1),(1,2,3),(2,1,3);
} {1 2 3 4 5 6 3 2 1 2 3 1 1 2 3 2 1 3}
do_execsql_test select4-14.10 {
  SELECT (VALUES(1),(2),(3),(4))
} {1}
do_execsql_test select4-14.11 {
  SELECT (SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4)
} {1}


finish_test

Changes to test/selectE.test.

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95
} {}
do_test selectE-2.2 {
  db eval {
    SELECT a COLLATE nocase FROM t2 EXCEPT SELECT a FROM t3
     ORDER BY 1 COLLATE binary
  }
} {}






finish_test








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} {}
do_test selectE-2.2 {
  db eval {
    SELECT a COLLATE nocase FROM t2 EXCEPT SELECT a FROM t3
     ORDER BY 1 COLLATE binary
  }
} {}

do_catchsql_test selectE-3.1 {
  SELECT 1 EXCEPT SELECT 2 ORDER BY 1 COLLATE nocase EXCEPT SELECT 3;
} {1 {ORDER BY clause should come after EXCEPT not before}}


finish_test

Changes to test/vacuum2.test.

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231
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the VACUUM statement.
#
# $Id: vacuum2.test,v 1.10 2009/02/18 20:31:18 drh Exp $

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


# Do not use a codec for tests in this file, as the database file is
# manipulated directly using tcl scripts (using the [hexio_write] command).
#
do_not_use_codec

# If the VACUUM statement is disabled in the current build, skip all
................................................................................
  db eval {SELECT a, b FROM t1 WHERE a<=10} {
    if {$a==6} { set res [catchsql VACUUM] }
    lappend res2 $a
  }
  lappend res2 $res
} {1 2 3 4 5 6 7 8 9 10 {1 {cannot VACUUM - SQL statements in progress}}}





















finish_test







>







 







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# This file implements regression tests for SQLite library.  The
# focus of this file is testing the VACUUM statement.
#
# $Id: vacuum2.test,v 1.10 2009/02/18 20:31:18 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix vacuum2

# Do not use a codec for tests in this file, as the database file is
# manipulated directly using tcl scripts (using the [hexio_write] command).
#
do_not_use_codec

# If the VACUUM statement is disabled in the current build, skip all
................................................................................
  db eval {SELECT a, b FROM t1 WHERE a<=10} {
    if {$a==6} { set res [catchsql VACUUM] }
    lappend res2 $a
  }
  lappend res2 $res
} {1 2 3 4 5 6 7 8 9 10 {1 {cannot VACUUM - SQL statements in progress}}}

#-------------------------------------------------------------------------
# Check that if the definition of a collation sequence is changed and
# VACUUM run, records are store in the (new) correct order following the
# VACUUM. Even if the modified collation is attached to a PK of a WITHOUT
# ROWID table.

proc cmp {lhs rhs} { string compare $lhs $rhs }
db collate cmp cmp
do_execsql_test 6.0 {
  CREATE TABLE t6(x PRIMARY KEY COLLATE cmp, y) WITHOUT ROWID;
  CREATE INDEX t6y ON t6(y);
  INSERT INTO t6 VALUES('i', 'one');
  INSERT INTO t6 VALUES('ii', 'one');
  INSERT INTO t6 VALUES('iii', 'one');
}
integrity_check 6.1
proc cmp {lhs rhs} { string compare $rhs $lhs }
do_execsql_test 6.2 VACUUM
integrity_check 6.3

finish_test

Changes to test/with1.test.

838
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846
  WITH RECURSIVE c(i) AS (SELECT 5,* UNION ALL SELECT i+1 FROM c WHERE i<10)
  SELECT i FROM c;
} {1 {no tables specified}}
do_catchsql_test 13.3 {
  WITH RECURSIVE c(i,j) AS (SELECT 5,* UNION ALL SELECT i+1,11 FROM c WHERE i<10)
  SELECT i FROM c;
} {1 {table c has 1 values for 2 columns}}







finish_test








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>

838
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  WITH RECURSIVE c(i) AS (SELECT 5,* UNION ALL SELECT i+1 FROM c WHERE i<10)
  SELECT i FROM c;
} {1 {no tables specified}}
do_catchsql_test 13.3 {
  WITH RECURSIVE c(i,j) AS (SELECT 5,* UNION ALL SELECT i+1,11 FROM c WHERE i<10)
  SELECT i FROM c;
} {1 {table c has 1 values for 2 columns}}

# 2015-04-12
#
do_execsql_test 14.1 {
  WITH x AS (SELECT * FROM t) SELECT 0 EXCEPT SELECT 0 ORDER BY 1 COLLATE binary;
} {}

finish_test

Changes to tool/sqldiff.c.

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....
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....
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1080
1081
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1083
1084
1085
  }
  return az;
}

/*
** Print the sqlite3_value X as an SQL literal.
*/
static void printQuoted(sqlite3_value *X){
  switch( sqlite3_value_type(X) ){
    case SQLITE_FLOAT: {
      double r1;
      char zBuf[50];
      r1 = sqlite3_value_double(X);
      sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.15g", r1);
      printf("%s", zBuf);
      break;
    }
    case SQLITE_INTEGER: {
      printf("%lld", sqlite3_value_int64(X));
      break;
    }
    case SQLITE_BLOB: {
      const unsigned char *zBlob = sqlite3_value_blob(X);
      int nBlob = sqlite3_value_bytes(X);
      if( zBlob ){
        int i;
        printf("x'");
        for(i=0; i<nBlob; i++){
          printf("%02x", zBlob[i]);
        }
        printf("'");
      }else{
        printf("NULL");
      }
      break;
    }
    case SQLITE_TEXT: {
      const unsigned char *zArg = sqlite3_value_text(X);
      int i, j;

      if( zArg==0 ){
        printf("NULL");
      }else{
        printf("'");
        for(i=j=0; zArg[i]; i++){
          if( zArg[i]=='\'' ){
            printf("%.*s'", i-j+1, &zArg[j]);
            j = i+1;
          }
        }
        printf("%s'", &zArg[j]);
      }
      break;
    }
    case SQLITE_NULL: {
      printf("NULL");
      break;
    }
  }
}

/*
** Output SQL that will recreate the aux.zTab table.
*/
static void dump_table(const char *zTab){
  char *zId = safeId(zTab); /* Name of the table */
  char **az = 0;            /* List of columns */
  int nPk;                  /* Number of true primary key columns */
  int nCol;                 /* Number of data columns */
  int i;                    /* Loop counter */
  sqlite3_stmt *pStmt;      /* SQL statement */
  const char *zSep;         /* Separator string */
  Str ins;                  /* Beginning of the INSERT statement */

  pStmt = db_prepare("SELECT sql FROM aux.sqlite_master WHERE name=%Q", zTab);
  if( SQLITE_ROW==sqlite3_step(pStmt) ){
    printf("%s;\n", sqlite3_column_text(pStmt,0));
  }
  sqlite3_finalize(pStmt);
  if( !g.bSchemaOnly ){
    az = columnNames("aux", zTab, &nPk);
    strInit(&ins);
    if( az==0 ){
      pStmt = db_prepare("SELECT * FROM aux.%s", zId);
................................................................................
        zSep = ",";
      }
      strPrintf(&ins,") VALUES");
      namelistFree(az);
    }
    nCol = sqlite3_column_count(pStmt);
    while( SQLITE_ROW==sqlite3_step(pStmt) ){
      printf("%s",ins.z);
      zSep = "(";
      for(i=0; i<nCol; i++){
        printf("%s",zSep);
        printQuoted(sqlite3_column_value(pStmt,i));
        zSep = ",";
      }
      printf(");\n");
    }
    sqlite3_finalize(pStmt);
    strFree(&ins);
  } /* endif !g.bSchemaOnly */
  pStmt = db_prepare("SELECT sql FROM aux.sqlite_master"
                     " WHERE type='index' AND tbl_name=%Q AND sql IS NOT NULL",
                     zTab);
  while( SQLITE_ROW==sqlite3_step(pStmt) ){
    printf("%s;\n", sqlite3_column_text(pStmt,0));
  }
  sqlite3_finalize(pStmt);
}


/*
** Compute all differences for a single table.
*/
static void diff_one_table(const char *zTab){
  char *zId = safeId(zTab); /* Name of table (translated for us in SQL) */
  char **az = 0;            /* Columns in main */
  char **az2 = 0;           /* Columns in aux */
  int nPk;                  /* Primary key columns in main */
  int nPk2;                 /* Primary key columns in aux */
  int n;                    /* Number of columns in main */
  int n2;                   /* Number of columns in aux */
................................................................................
    goto end_diff_one_table;
  }
    

  if( sqlite3_table_column_metadata(g.db,"aux",zTab,0,0,0,0,0,0) ){
    if( !sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
      /* Table missing from second database. */
      printf("DROP TABLE %s;\n", zId);
    }
    goto end_diff_one_table;
  }

  if( sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
    /* Table missing from source */
    dump_table(zTab);
    goto end_diff_one_table;
  }

  az = columnNames("main", zTab, &nPk);
  az2 = columnNames("aux", zTab, &nPk2);
  if( az && az2 ){
    for(n=0; az[n]; n++){
................................................................................
  }
  if( az==0
   || az2==0
   || nPk!=nPk2
   || az[n]
  ){
    /* Schema mismatch */
    printf("DROP TABLE %s;\n", zId);
    dump_table(zTab);
    goto end_diff_one_table;
  }

  /* Build the comparison query */
  for(n2=n; az[n2]; n2++){}
  nQ = nPk2+1+2*(n2-nPk2);
  if( n2>nPk2 ){
................................................................................
    "   AND sql IS NOT NULL"
    "   AND sql NOT IN (SELECT sql FROM aux.sqlite_master"
    "                    WHERE type='index' AND tbl_name=%Q"
    "                      AND sql IS NOT NULL)",
    zTab, zTab);
  while( SQLITE_ROW==sqlite3_step(pStmt) ){
    char *z = safeId((const char*)sqlite3_column_text(pStmt,0));
    printf("DROP INDEX %s;\n", z);
    sqlite3_free(z);
  }
  sqlite3_finalize(pStmt);

  /* Run the query and output differences */
  if( !g.bSchemaOnly ){
    pStmt = db_prepare(sql.z);
    while( SQLITE_ROW==sqlite3_step(pStmt) ){
      int iType = sqlite3_column_int(pStmt, nPk);
      if( iType==1 || iType==2 ){
        if( iType==1 ){       /* Change the content of a row */
          printf("UPDATE %s", zId);
          zSep = " SET";
          for(i=nPk+1; i<nQ; i+=2){
            if( sqlite3_column_int(pStmt,i)==0 ) continue;
            printf("%s %s=", zSep, az2[(i+nPk-1)/2]);
            zSep = ",";
            printQuoted(sqlite3_column_value(pStmt,i+1));
          }
        }else{                /* Delete a row */
          printf("DELETE FROM %s", zId);
        }
        zSep = " WHERE";
        for(i=0; i<nPk; i++){
          printf("%s %s=", zSep, az2[i]);
          printQuoted(sqlite3_column_value(pStmt,i));
          zSep = ",";
        }
        printf(";\n");
      }else{                  /* Insert a row */
        printf("INSERT INTO %s(%s", zId, az2[0]);
        for(i=1; az2[i]; i++) printf(",%s", az2[i]);
        printf(") VALUES");
        zSep = "(";
        for(i=0; i<nPk2; i++){
          printf("%s", zSep);
          zSep = ",";
          printQuoted(sqlite3_column_value(pStmt,i));
        }
        for(i=nPk2+2; i<nQ; i+=2){
          printf(",");
          printQuoted(sqlite3_column_value(pStmt,i));
        }
        printf(");\n");
      }
    }
    sqlite3_finalize(pStmt);
  } /* endif !g.bSchemaOnly */

  /* Create indexes that are missing in the source */
  pStmt = db_prepare(
................................................................................
    " WHERE type='index' AND tbl_name=%Q"
    "   AND sql IS NOT NULL"
    "   AND sql NOT IN (SELECT sql FROM main.sqlite_master"
    "                    WHERE type='index' AND tbl_name=%Q"
    "                      AND sql IS NOT NULL)",
    zTab, zTab);
  while( SQLITE_ROW==sqlite3_step(pStmt) ){
    printf("%s;\n", sqlite3_column_text(pStmt,0));
  }
  sqlite3_finalize(pStmt);

end_diff_one_table:
  strFree(&sql);







































































































































  sqlite3_free(zId);
  namelistFree(az);
  namelistFree(az2);
  return;
}

/*
................................................................................
  printf("Usage: %s [options] DB1 DB2\n", g.zArgv0);
  printf(
"Output SQL text that would transform DB1 into DB2.\n"
"Options:\n"
"  --changeset FILE      Write a CHANGESET into FILE\n"
"  --primarykey          Use schema-defined PRIMARY KEYs\n"
"  --schema              Show only differences in the schema\n"

"  --table TAB           Show only differences in table TAB\n"
  );
}

int main(int argc, char **argv){
  const char *zDb1 = 0;
  const char *zDb2 = 0;
  int i;
  int rc;
  char *zErrMsg = 0;
  char *zSql;
  sqlite3_stmt *pStmt;
  char *zTab = 0;
  FILE *out = 0;


  g.zArgv0 = argv[0];
  for(i=1; i<argc; i++){
    const char *z = argv[i];
    if( z[0]=='-' ){
      z++;
      if( z[0]=='-' ) z++;
      if( strcmp(z,"changeset")==0 ){
        out = fopen(argv[++i], "wb");
        if( out==0 ) cmdlineError("cannot open: %s", argv[i]);

      }else
      if( strcmp(z,"debug")==0 ){
        g.fDebug = strtol(argv[++i], 0, 0);
      }else
      if( strcmp(z,"help")==0 ){
        showHelp();
        return 0;
................................................................................
      }else
      if( strcmp(z,"primarykey")==0 ){
        g.bSchemaPK = 1;
      }else
      if( strcmp(z,"schema")==0 ){
        g.bSchemaOnly = 1;
      }else



      if( strcmp(z,"table")==0 ){
        zTab = argv[++i];
      }else
      {
        cmdlineError("unknown option: %s", argv[i]);
      }
    }else if( zDb1==0 ){
................................................................................
  }
  rc = sqlite3_exec(g.db, "SELECT * FROM aux.sqlite_master", 0, 0, &zErrMsg);
  if( rc || zErrMsg ){
    cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb2);
  }

  if( zTab ){
    if( out ){
      changeset_one_table(zTab, out);
    }else{
      diff_one_table(zTab);
    }
  }else{
    /* Handle tables one by one */
    pStmt = db_prepare(
      "SELECT name FROM main.sqlite_master\n"
      " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
      " UNION\n"
      "SELECT name FROM aux.sqlite_master\n"
      " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
      " ORDER BY name"
    );
    while( SQLITE_ROW==sqlite3_step(pStmt) ){
      const char *zTab = (const char*)sqlite3_column_text(pStmt,0);
      if( out ){
        changeset_one_table(zTab, out);
      }else{
        diff_one_table(zTab);
      }
    }
    sqlite3_finalize(pStmt);
  }

  /* TBD: Handle trigger differences */
  /* TBD: Handle view differences */
  sqlite3_close(g.db);
  return 0;
}







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  }
  return az;
}

/*
** Print the sqlite3_value X as an SQL literal.
*/
static void printQuoted(FILE *out, sqlite3_value *X){
  switch( sqlite3_value_type(X) ){
    case SQLITE_FLOAT: {
      double r1;
      char zBuf[50];
      r1 = sqlite3_value_double(X);
      sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.15g", r1);
      fprintf(out, "%s", zBuf);
      break;
    }
    case SQLITE_INTEGER: {
      fprintf(out, "%lld", sqlite3_value_int64(X));
      break;
    }
    case SQLITE_BLOB: {
      const unsigned char *zBlob = sqlite3_value_blob(X);
      int nBlob = sqlite3_value_bytes(X);
      if( zBlob ){
        int i;
        fprintf(out, "x'");
        for(i=0; i<nBlob; i++){
          fprintf(out, "%02x", zBlob[i]);
        }
        fprintf(out, "'");
      }else{
        fprintf(out, "NULL");
      }
      break;
    }
    case SQLITE_TEXT: {
      const unsigned char *zArg = sqlite3_value_text(X);
      int i, j;

      if( zArg==0 ){
        fprintf(out, "NULL");
      }else{
        fprintf(out, "'");
        for(i=j=0; zArg[i]; i++){
          if( zArg[i]=='\'' ){
            fprintf(out, "%.*s'", i-j+1, &zArg[j]);
            j = i+1;
          }
        }
        fprintf(out, "%s'", &zArg[j]);
      }
      break;
    }
    case SQLITE_NULL: {
      fprintf(out, "NULL");
      break;
    }
  }
}

/*
** Output SQL that will recreate the aux.zTab table.
*/
static void dump_table(const char *zTab, FILE *out){
  char *zId = safeId(zTab); /* Name of the table */
  char **az = 0;            /* List of columns */
  int nPk;                  /* Number of true primary key columns */
  int nCol;                 /* Number of data columns */
  int i;                    /* Loop counter */
  sqlite3_stmt *pStmt;      /* SQL statement */
  const char *zSep;         /* Separator string */
  Str ins;                  /* Beginning of the INSERT statement */

  pStmt = db_prepare("SELECT sql FROM aux.sqlite_master WHERE name=%Q", zTab);
  if( SQLITE_ROW==sqlite3_step(pStmt) ){
    fprintf(out, "%s;\n", sqlite3_column_text(pStmt,0));
  }
  sqlite3_finalize(pStmt);
  if( !g.bSchemaOnly ){
    az = columnNames("aux", zTab, &nPk);
    strInit(&ins);
    if( az==0 ){
      pStmt = db_prepare("SELECT * FROM aux.%s", zId);
................................................................................
        zSep = ",";
      }
      strPrintf(&ins,") VALUES");
      namelistFree(az);
    }
    nCol = sqlite3_column_count(pStmt);
    while( SQLITE_ROW==sqlite3_step(pStmt) ){
      fprintf(out, "%s",ins.z);
      zSep = "(";
      for(i=0; i<nCol; i++){
        fprintf(out, "%s",zSep);
        printQuoted(out, sqlite3_column_value(pStmt,i));
        zSep = ",";
      }
      fprintf(out, ");\n");
    }
    sqlite3_finalize(pStmt);
    strFree(&ins);
  } /* endif !g.bSchemaOnly */
  pStmt = db_prepare("SELECT sql FROM aux.sqlite_master"
                     " WHERE type='index' AND tbl_name=%Q AND sql IS NOT NULL",
                     zTab);
  while( SQLITE_ROW==sqlite3_step(pStmt) ){
    fprintf(out, "%s;\n", sqlite3_column_text(pStmt,0));
  }
  sqlite3_finalize(pStmt);
}


/*
** Compute all differences for a single table.
*/
static void diff_one_table(const char *zTab, FILE *out){
  char *zId = safeId(zTab); /* Name of table (translated for us in SQL) */
  char **az = 0;            /* Columns in main */
  char **az2 = 0;           /* Columns in aux */
  int nPk;                  /* Primary key columns in main */
  int nPk2;                 /* Primary key columns in aux */
  int n;                    /* Number of columns in main */
  int n2;                   /* Number of columns in aux */
................................................................................
    goto end_diff_one_table;
  }
    

  if( sqlite3_table_column_metadata(g.db,"aux",zTab,0,0,0,0,0,0) ){
    if( !sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
      /* Table missing from second database. */
      fprintf(out, "DROP TABLE %s;\n", zId);
    }
    goto end_diff_one_table;
  }

  if( sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
    /* Table missing from source */
    dump_table(zTab, out);
    goto end_diff_one_table;
  }

  az = columnNames("main", zTab, &nPk);
  az2 = columnNames("aux", zTab, &nPk2);
  if( az && az2 ){
    for(n=0; az[n]; n++){
................................................................................
  }
  if( az==0
   || az2==0
   || nPk!=nPk2
   || az[n]
  ){
    /* Schema mismatch */
    fprintf(out, "DROP TABLE %s;\n", zId);
    dump_table(zTab, out);
    goto end_diff_one_table;
  }

  /* Build the comparison query */
  for(n2=n; az[n2]; n2++){}
  nQ = nPk2+1+2*(n2-nPk2);
  if( n2>nPk2 ){
................................................................................
    "   AND sql IS NOT NULL"
    "   AND sql NOT IN (SELECT sql FROM aux.sqlite_master"
    "                    WHERE type='index' AND tbl_name=%Q"
    "                      AND sql IS NOT NULL)",
    zTab, zTab);
  while( SQLITE_ROW==sqlite3_step(pStmt) ){
    char *z = safeId((const char*)sqlite3_column_text(pStmt,0));
    fprintf(out, "DROP INDEX %s;\n", z);
    sqlite3_free(z);
  }
  sqlite3_finalize(pStmt);

  /* Run the query and output differences */
  if( !g.bSchemaOnly ){
    pStmt = db_prepare(sql.z);
    while( SQLITE_ROW==sqlite3_step(pStmt) ){
      int iType = sqlite3_column_int(pStmt, nPk);
      if( iType==1 || iType==2 ){
        if( iType==1 ){       /* Change the content of a row */
          fprintf(out, "UPDATE %s", zId);
          zSep = " SET";
          for(i=nPk+1; i<nQ; i+=2){
            if( sqlite3_column_int(pStmt,i)==0 ) continue;
            fprintf(out, "%s %s=", zSep, az2[(i+nPk-1)/2]);
            zSep = ",";
            printQuoted(out, sqlite3_column_value(pStmt,i+1));
          }
        }else{                /* Delete a row */
          fprintf(out, "DELETE FROM %s", zId);
        }
        zSep = " WHERE";
        for(i=0; i<nPk; i++){
          fprintf(out, "%s %s=", zSep, az2[i]);
          printQuoted(out, sqlite3_column_value(pStmt,i));
          zSep = ",";
        }
        fprintf(out, ";\n");
      }else{                  /* Insert a row */
        fprintf(out, "INSERT INTO %s(%s", zId, az2[0]);
        for(i=1; az2[i]; i++) fprintf(out, ",%s", az2[i]);
        fprintf(out, ") VALUES");
        zSep = "(";
        for(i=0; i<nPk2; i++){
          fprintf(out, "%s", zSep);
          zSep = ",";
          printQuoted(out, sqlite3_column_value(pStmt,i));
        }
        for(i=nPk2+2; i<nQ; i+=2){
          fprintf(out, ",");
          printQuoted(out, sqlite3_column_value(pStmt,i));
        }
        fprintf(out, ");\n");
      }
    }
    sqlite3_finalize(pStmt);
  } /* endif !g.bSchemaOnly */

  /* Create indexes that are missing in the source */
  pStmt = db_prepare(
................................................................................
    " WHERE type='index' AND tbl_name=%Q"
    "   AND sql IS NOT NULL"
    "   AND sql NOT IN (SELECT sql FROM main.sqlite_master"
    "                    WHERE type='index' AND tbl_name=%Q"
    "                      AND sql IS NOT NULL)",
    zTab, zTab);
  while( SQLITE_ROW==sqlite3_step(pStmt) ){
    fprintf(out, "%s;\n", sqlite3_column_text(pStmt,0));
  }
  sqlite3_finalize(pStmt);

end_diff_one_table:
  strFree(&sql);
  sqlite3_free(zId);
  namelistFree(az);
  namelistFree(az2);
  return;
}

/*
** Display a summary of differences between two versions of the same
** table table.
**
**   *  Number of rows changed
**   *  Number of rows added
**   *  Number of rows deleted
**   *  Number of identical rows
*/
static void summarize_one_table(const char *zTab, FILE *out){
  char *zId = safeId(zTab); /* Name of table (translated for us in SQL) */
  char **az = 0;            /* Columns in main */
  char **az2 = 0;           /* Columns in aux */
  int nPk;                  /* Primary key columns in main */
  int nPk2;                 /* Primary key columns in aux */
  int n;                    /* Number of columns in main */
  int n2;                   /* Number of columns in aux */
  int i;                    /* Loop counter */
  const char *zSep;         /* Separator string */
  Str sql;                  /* Comparison query */
  sqlite3_stmt *pStmt;      /* Query statement to do the diff */
  sqlite3_int64 nUpdate;    /* Number of updated rows */
  sqlite3_int64 nUnchanged; /* Number of unmodified rows */
  sqlite3_int64 nDelete;    /* Number of deleted rows */
  sqlite3_int64 nInsert;    /* Number of inserted rows */

  strInit(&sql);
  if( sqlite3_table_column_metadata(g.db,"aux",zTab,0,0,0,0,0,0) ){
    if( !sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
      /* Table missing from second database. */
      fprintf(out, "%s: missing from second database\n", zTab);
    }
    goto end_summarize_one_table;
  }

  if( sqlite3_table_column_metadata(g.db,"main",zTab,0,0,0,0,0,0) ){
    /* Table missing from source */
    fprintf(out, "%s: missing from first database\n", zTab);
    goto end_summarize_one_table;
  }

  az = columnNames("main", zTab, &nPk);
  az2 = columnNames("aux", zTab, &nPk2);
  if( az && az2 ){
    for(n=0; az[n]; n++){
      if( sqlite3_stricmp(az[n],az2[n])!=0 ) break;
    }
  }
  if( az==0
   || az2==0
   || nPk!=nPk2
   || az[n]
  ){
    /* Schema mismatch */
    fprintf(out, "%s: incompatible schema\n", zTab);
    goto end_summarize_one_table;
  }

  /* Build the comparison query */
  for(n2=n; az[n2]; n2++){}
  strPrintf(&sql, "SELECT 1, count(*)");
  if( n2==nPk2 ){
    strPrintf(&sql, ", 0\n");
  }else{
    zSep = ", sum(";
    for(i=nPk; az[i]; i++){
      strPrintf(&sql, "%sA.%s IS NOT B.%s", zSep, az[i], az[i]);
      zSep = " OR ";
    }
    strPrintf(&sql, ")\n");
  }
  strPrintf(&sql, "  FROM main.%s A, aux.%s B\n", zId, zId);
  zSep = " WHERE";
  for(i=0; i<nPk; i++){
    strPrintf(&sql, "%s A.%s=B.%s", zSep, az[i], az[i]);
    zSep = " AND";
  }
  strPrintf(&sql, " UNION ALL\n");
  strPrintf(&sql, "SELECT 2, count(*), 0\n");
  strPrintf(&sql, "  FROM main.%s A\n", zId);
  strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM aux.%s B ", zId);
  zSep = "WHERE";
  for(i=0; i<nPk; i++){
    strPrintf(&sql, "%s A.%s=B.%s", zSep, az[i], az[i]);
    zSep = " AND";
  }
  strPrintf(&sql, ")\n");
  strPrintf(&sql, " UNION ALL\n");
  strPrintf(&sql, "SELECT 3, count(*), 0\n");
  strPrintf(&sql, "  FROM aux.%s B\n", zId);
  strPrintf(&sql, " WHERE NOT EXISTS(SELECT 1 FROM main.%s A ", zId);
  zSep = "WHERE";
  for(i=0; i<nPk; i++){
    strPrintf(&sql, "%s A.%s=B.%s", zSep, az[i], az[i]);
    zSep = " AND";
  }
  strPrintf(&sql, ")\n ORDER BY 1;\n");

  if( (g.fDebug & DEBUG_DIFF_SQL)!=0 ){ 
    printf("SQL for %s:\n%s\n", zId, sql.z);
    goto end_summarize_one_table;
  }

  /* Run the query and output difference summary */
  pStmt = db_prepare(sql.z);
  nUpdate = 0;
  nInsert = 0;
  nDelete = 0;
  nUnchanged = 0;
  while( SQLITE_ROW==sqlite3_step(pStmt) ){
    switch( sqlite3_column_int(pStmt,0) ){
      case 1:
        nUpdate = sqlite3_column_int64(pStmt,2);
        nUnchanged = sqlite3_column_int64(pStmt,1) - nUpdate;
        break;
      case 2:
        nDelete = sqlite3_column_int64(pStmt,1);
        break;
      case 3:
        nInsert = sqlite3_column_int64(pStmt,1);
        break;
    }
  }
  sqlite3_finalize(pStmt);
  fprintf(out, "%s: %lld changes, %lld inserts, %lld deletes, %lld unchanged\n",
          zTab, nUpdate, nInsert, nDelete, nUnchanged);

end_summarize_one_table:
  strFree(&sql);
  sqlite3_free(zId);
  namelistFree(az);
  namelistFree(az2);
  return;
}

/*
................................................................................
  printf("Usage: %s [options] DB1 DB2\n", g.zArgv0);
  printf(
"Output SQL text that would transform DB1 into DB2.\n"
"Options:\n"
"  --changeset FILE      Write a CHANGESET into FILE\n"
"  --primarykey          Use schema-defined PRIMARY KEYs\n"
"  --schema              Show only differences in the schema\n"
"  --summary             Show only a summary of the differences\n"
"  --table TAB           Show only differences in table TAB\n"
  );
}

int main(int argc, char **argv){
  const char *zDb1 = 0;
  const char *zDb2 = 0;
  int i;
  int rc;
  char *zErrMsg = 0;
  char *zSql;
  sqlite3_stmt *pStmt;
  char *zTab = 0;
  FILE *out = stdout;
  void (*xDiff)(const char*,FILE*) = diff_one_table;

  g.zArgv0 = argv[0];
  for(i=1; i<argc; i++){
    const char *z = argv[i];
    if( z[0]=='-' ){
      z++;
      if( z[0]=='-' ) z++;
      if( strcmp(z,"changeset")==0 ){
        out = fopen(argv[++i], "wb");
        if( out==0 ) cmdlineError("cannot open: %s", argv[i]);
        xDiff = changeset_one_table;
      }else
      if( strcmp(z,"debug")==0 ){
        g.fDebug = strtol(argv[++i], 0, 0);
      }else
      if( strcmp(z,"help")==0 ){
        showHelp();
        return 0;
................................................................................
      }else
      if( strcmp(z,"primarykey")==0 ){
        g.bSchemaPK = 1;
      }else
      if( strcmp(z,"schema")==0 ){
        g.bSchemaOnly = 1;
      }else
      if( strcmp(z,"summary")==0 ){
        xDiff = summarize_one_table;
      }else
      if( strcmp(z,"table")==0 ){
        zTab = argv[++i];
      }else
      {
        cmdlineError("unknown option: %s", argv[i]);
      }
    }else if( zDb1==0 ){
................................................................................
  }
  rc = sqlite3_exec(g.db, "SELECT * FROM aux.sqlite_master", 0, 0, &zErrMsg);
  if( rc || zErrMsg ){
    cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb2);
  }

  if( zTab ){

    xDiff(zTab, out);



  }else{
    /* Handle tables one by one */
    pStmt = db_prepare(
      "SELECT name FROM main.sqlite_master\n"
      " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
      " UNION\n"
      "SELECT name FROM aux.sqlite_master\n"
      " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
      " ORDER BY name"
    );
    while( SQLITE_ROW==sqlite3_step(pStmt) ){
      xDiff((const char*)sqlite3_column_text(pStmt,0), out);





    }
    sqlite3_finalize(pStmt);
  }

  /* TBD: Handle trigger differences */
  /* TBD: Handle view differences */
  sqlite3_close(g.db);
  return 0;
}