AM_CFLAGS = @THREADSAFE_FLAGS@ @DYNAMIC_EXTENSION_FLAGS@ @FTS5_FLAGS@ @JSON1_FLAGS@ @SESSION_FLAGS@ -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_RTREE

lib_LTLIBRARIES = libsqlite3.la
libsqlite3_la_SOURCES = sqlite3.c
libsqlite3_la_LDFLAGS = -no-undefined -version-info 8:6:8

bin_PROGRAMS = sqlite3
sqlite3_SOURCES = shell.c sqlite3.h

AM_CFLAGS = @THREADSAFE_FLAGS@ @DYNAMIC_EXTENSION_FLAGS@ @FTS5_FLAGS@ @JSON1_FLAGS@ @ZLIB_FLAGS@ @SESSION_FLAGS@ -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_RTREE

lib_LTLIBRARIES = libsqlite3.la
libsqlite3_la_SOURCES = sqlite3.c
libsqlite3_la_LDFLAGS = -no-undefined -version-info 8:6:8

bin_PROGRAMS = sqlite3
sqlite3_SOURCES = shell.c sqlite3.h

else
  EXTRA_SHELL_OBJ=libsqlite3.la
fi
AC_SUBST(EXTRA_SHELL_OBJ)
#-----------------------------------------------------------------------

AC_CHECK_FUNCS(posix_fallocate)





#-----------------------------------------------------------------------
# UPDATE: Maybe it's better if users just set CFLAGS before invoking
# configure. This option doesn't really add much...
#
#   --enable-tempstore
#

else
  EXTRA_SHELL_OBJ=libsqlite3.la
fi
AC_SUBST(EXTRA_SHELL_OBJ)
#-----------------------------------------------------------------------

AC_CHECK_FUNCS(posix_fallocate)
AC_CHECK_HEADERS(zlib.h,[
  AC_SEARCH_LIBS(deflate,z,[ZLIB_FLAGS="-DSQLITE_HAVE_ZLIB"])
])
AC_SUBST(ZLIB_FLAGS)

#-----------------------------------------------------------------------
# UPDATE: Maybe it's better if users just set CFLAGS before invoking
# configure. This option doesn't really add much...
#
#   --enable-tempstore
#

static int expertUpdate(
  sqlite3_vtab *pVtab, 
  int nData, 
  sqlite3_value **azData, 
  sqlite_int64 *pRowid
){




  return SQLITE_OK;
}

/* 
** Virtual table module xOpen method.
*/
static int expertOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor){
  int rc = SQLITE_OK;
  ExpertCsr *pCsr;

  pCsr = idxMalloc(&rc, sizeof(ExpertCsr));
  *ppCursor = (sqlite3_vtab_cursor*)pCsr;
  return rc;
}

/* 
** Virtual table module xClose method.
................................................................................
  return rc;
}

/* 
** Virtual table module xRowid method.
*/
static int expertRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){

  *pRowid = 0;
  return SQLITE_OK;
}

/* 
** Virtual table module xColumn method.
*/
................................................................................
  int argc, sqlite3_value **argv
){
  ExpertCsr *pCsr = (ExpertCsr*)cur;
  ExpertVtab *pVtab = (ExpertVtab*)(cur->pVtab);
  sqlite3expert *pExpert = pVtab->pExpert;
  int rc;





  rc = sqlite3_finalize(pCsr->pData);
  pCsr->pData = 0;
  if( rc==SQLITE_OK ){
    rc = idxPrintfPrepareStmt(pExpert->db, &pCsr->pData, &pVtab->base.zErrMsg,
        "SELECT * FROM main.%Q WHERE sample()", pVtab->pTab->zName
    );
  }
................................................................................
  return rc;
}

/*
** Create candidate indexes in database [dbm] based on the data in 
** linked-list pScan.
*/
static int idxCreateCandidates(sqlite3expert *p, char **pzErr){
  int rc = SQLITE_OK;
  IdxScan *pIter;

  for(pIter=p->pScan; pIter && rc==SQLITE_OK; pIter=pIter->pNextScan){
    rc = idxCreateFromWhere(p, pIter, 0);
    if( rc==SQLITE_OK && pIter->pOrder ){
      rc = idxCreateFromWhere(p, pIter, pIter->pOrder);
................................................................................
  int eOp,
  const char *z3,
  const char *z4,
  const char *zDb,
  const char *zTrigger
){
  int rc = SQLITE_OK;


  if( eOp==SQLITE_INSERT || eOp==SQLITE_UPDATE || eOp==SQLITE_DELETE ){
    if( sqlite3_stricmp(zDb, "main")==0 ){
      sqlite3expert *p = (sqlite3expert*)pCtx;
      IdxTable *pTab;
      for(pTab=p->pTable; pTab; pTab=pTab->pNext){
        if( 0==sqlite3_stricmp(z3, pTab->zName) ) break;
      }
................................................................................
  sqlite3_context *pCtx,
  int argc,
  sqlite3_value **argv
){
  struct IdxSampleCtx *p = (struct IdxSampleCtx*)sqlite3_user_data(pCtx);
  int bRet;


  assert( argc==0 );
  if( p->nRow==0.0 ){
    bRet = 1;
  }else{
    bRet = (p->nRet / p->nRow) <= p->target;
    if( bRet==0 ){
      unsigned short rnd;
................................................................................
  IdxHashEntry *pEntry;

  /* Do trigger processing to collect any extra IdxScan structures */
  rc = idxProcessTriggers(p, pzErr);

  /* Create candidate indexes within the in-memory database file */
  if( rc==SQLITE_OK ){
    rc = idxCreateCandidates(p, pzErr);
  }

  /* Generate the stat1 data */
  if( rc==SQLITE_OK ){
    rc = idxPopulateStat1(p, pzErr);
  }

static int expertUpdate(
  sqlite3_vtab *pVtab, 
  int nData, 
  sqlite3_value **azData, 
  sqlite_int64 *pRowid
){
  (void)pVtab;
  (void)nData;
  (void)azData;
  (void)pRowid;
  return SQLITE_OK;
}

/* 
** Virtual table module xOpen method.
*/
static int expertOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor){
  int rc = SQLITE_OK;
  ExpertCsr *pCsr;
  (void)pVTab;
  pCsr = idxMalloc(&rc, sizeof(ExpertCsr));
  *ppCursor = (sqlite3_vtab_cursor*)pCsr;
  return rc;
}

/* 
** Virtual table module xClose method.
................................................................................
  return rc;
}

/* 
** Virtual table module xRowid method.
*/
static int expertRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){
  (void)cur;
  *pRowid = 0;
  return SQLITE_OK;
}

/* 
** Virtual table module xColumn method.
*/
................................................................................
  int argc, sqlite3_value **argv
){
  ExpertCsr *pCsr = (ExpertCsr*)cur;
  ExpertVtab *pVtab = (ExpertVtab*)(cur->pVtab);
  sqlite3expert *pExpert = pVtab->pExpert;
  int rc;

  (void)idxNum;
  (void)idxStr;
  (void)argc;
  (void)argv;
  rc = sqlite3_finalize(pCsr->pData);
  pCsr->pData = 0;
  if( rc==SQLITE_OK ){
    rc = idxPrintfPrepareStmt(pExpert->db, &pCsr->pData, &pVtab->base.zErrMsg,
        "SELECT * FROM main.%Q WHERE sample()", pVtab->pTab->zName
    );
  }
................................................................................
  return rc;
}

/*
** Create candidate indexes in database [dbm] based on the data in 
** linked-list pScan.
*/
static int idxCreateCandidates(sqlite3expert *p){
  int rc = SQLITE_OK;
  IdxScan *pIter;

  for(pIter=p->pScan; pIter && rc==SQLITE_OK; pIter=pIter->pNextScan){
    rc = idxCreateFromWhere(p, pIter, 0);
    if( rc==SQLITE_OK && pIter->pOrder ){
      rc = idxCreateFromWhere(p, pIter, pIter->pOrder);
................................................................................
  int eOp,
  const char *z3,
  const char *z4,
  const char *zDb,
  const char *zTrigger
){
  int rc = SQLITE_OK;
  (void)z4;
  (void)zTrigger;
  if( eOp==SQLITE_INSERT || eOp==SQLITE_UPDATE || eOp==SQLITE_DELETE ){
    if( sqlite3_stricmp(zDb, "main")==0 ){
      sqlite3expert *p = (sqlite3expert*)pCtx;
      IdxTable *pTab;
      for(pTab=p->pTable; pTab; pTab=pTab->pNext){
        if( 0==sqlite3_stricmp(z3, pTab->zName) ) break;
      }
................................................................................
  sqlite3_context *pCtx,
  int argc,
  sqlite3_value **argv
){
  struct IdxSampleCtx *p = (struct IdxSampleCtx*)sqlite3_user_data(pCtx);
  int bRet;

  (void)argv;
  assert( argc==0 );
  if( p->nRow==0.0 ){
    bRet = 1;
  }else{
    bRet = (p->nRet / p->nRow) <= p->target;
    if( bRet==0 ){
      unsigned short rnd;
................................................................................
  IdxHashEntry *pEntry;

  /* Do trigger processing to collect any extra IdxScan structures */
  rc = idxProcessTriggers(p, pzErr);

  /* Create candidate indexes within the in-memory database file */
  if( rc==SQLITE_OK ){
    rc = idxCreateCandidates(p);
  }

  /* Generate the stat1 data */
  if( rc==SQLITE_OK ){
    rc = idxPopulateStat1(p, pzErr);
  }

      Fts5PhraseIter iter;

      if( Tcl_GetIntFromObj(interp, objv[2], &iPhrase) ) return TCL_ERROR;
      zColvar = Tcl_GetString(objv[3]);

      rc = p->pApi->xPhraseFirstColumn(p->pFts, iPhrase, &iter, &iCol);
      if( rc!=SQLITE_OK ){
        Tcl_AppendResult(interp, sqlite3ErrName(rc), 0);
        return TCL_ERROR;
      }
      for( ; iCol>=0; p->pApi->xPhraseNextColumn(p->pFts, &iter, &iCol)){
        Tcl_SetVar2Ex(interp, zColvar, 0, Tcl_NewIntObj(iCol), 0);
        rc = Tcl_EvalObjEx(interp, pScript, 0);
        if( rc==TCL_CONTINUE ) rc = TCL_OK;
        if( rc!=TCL_OK ){
................................................................................
        "sqlite3_fts5_token may only be used by tokenizer callback", 0
    );
    return TCL_ERROR;
  }

  rc = p->xToken(p->pCtx, tflags, zToken, nToken, iStart, iEnd);
  Tcl_SetResult(interp, (char*)sqlite3ErrName(rc), TCL_VOLATILE);
  return TCL_OK;

 usage:
  Tcl_WrongNumArgs(interp, 1, objv, "?-colocated? TEXT START END");
  return TCL_ERROR;
}

static void f5tDelTokenizer(void *pCtx){

      Fts5PhraseIter iter;

      if( Tcl_GetIntFromObj(interp, objv[2], &iPhrase) ) return TCL_ERROR;
      zColvar = Tcl_GetString(objv[3]);

      rc = p->pApi->xPhraseFirstColumn(p->pFts, iPhrase, &iter, &iCol);
      if( rc!=SQLITE_OK ){
        Tcl_SetResult(interp, (char*)sqlite3ErrName(rc), TCL_VOLATILE);
        return TCL_ERROR;
      }
      for( ; iCol>=0; p->pApi->xPhraseNextColumn(p->pFts, &iter, &iCol)){
        Tcl_SetVar2Ex(interp, zColvar, 0, Tcl_NewIntObj(iCol), 0);
        rc = Tcl_EvalObjEx(interp, pScript, 0);
        if( rc==TCL_CONTINUE ) rc = TCL_OK;
        if( rc!=TCL_OK ){
................................................................................
        "sqlite3_fts5_token may only be used by tokenizer callback", 0
    );
    return TCL_ERROR;
  }

  rc = p->xToken(p->pCtx, tflags, zToken, nToken, iStart, iEnd);
  Tcl_SetResult(interp, (char*)sqlite3ErrName(rc), TCL_VOLATILE);
  return rc==SQLITE_OK ? TCL_OK : TCL_ERROR;

 usage:
  Tcl_WrongNumArgs(interp, 1, objv, "?-colocated? TEXT START END");
  return TCL_ERROR;
}

static void f5tDelTokenizer(void *pCtx){

  sqlite3_fts5_register_matchinfo db
  db func mit mit
} -body {
  db eval { 
    SELECT rowid, mit(matchinfo(t1, 'x')) FROM t1 WHERE t1 MATCH 'a AND c'
  }
} -test {
  faultsim_test_result [list 0 $::res]
}

do_faultsim_test 5.3 -faults oom* -prep {
  faultsim_restore_and_reopen
  sqlite3_fts5_create_tokenizer db tcl tcl_create
} -body {
  db eval { 
    SELECT count(*) FROM t1 WHERE t1 MATCH 'd AND e AND f'
  }
} -test {
  faultsim_test_result {0 29}
}

do_faultsim_test 5.4 -faults oom* -prep {
  faultsim_restore_and_reopen
  sqlite3_fts5_create_tokenizer db tcl tcl_create
} -body {
  db eval { 
    SELECT count(*) FROM t1 WHERE t1 MATCH 'x + e'
  }
} -test {
  faultsim_test_result {0 1}
}

#-------------------------------------------------------------------------
catch { db close }
do_faultsim_test 6 -faults oom* -prep {
  sqlite_orig db test.db
  sqlite3_db_config_lookaside db 0 0 0

  sqlite3_fts5_register_matchinfo db
  db func mit mit
} -body {
  db eval { 
    SELECT rowid, mit(matchinfo(t1, 'x')) FROM t1 WHERE t1 MATCH 'a AND c'
  }
} -test {
  faultsim_test_result [list 0 $::res] {1 {SQL logic error}}
}

do_faultsim_test 5.3 -faults oom* -prep {
  faultsim_restore_and_reopen
  sqlite3_fts5_create_tokenizer db tcl tcl_create
} -body {
  db eval { 
    SELECT count(*) FROM t1 WHERE t1 MATCH 'd AND e AND f'
  }
} -test {
  faultsim_test_result {0 29} {1 {SQL logic error}}
}

do_faultsim_test 5.4 -faults oom* -prep {
  faultsim_restore_and_reopen
  sqlite3_fts5_create_tokenizer db tcl tcl_create
} -body {
  db eval { 
    SELECT count(*) FROM t1 WHERE t1 MATCH 'x + e'
  }
} -test {
  faultsim_test_result {0 1} {1 {SQL logic error}}
}

#-------------------------------------------------------------------------
catch { db close }
do_faultsim_test 6 -faults oom* -prep {
  sqlite_orig db test.db
  sqlite3_db_config_lookaside db 0 0 0

ifcapable !fts5 {
  finish_test
  return
}

foreach_detail_mode $testprefix {



fts5_aux_test_functions db

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(a, b, detail=%DETAIL%);
  INSERT INTO t1(t1, rank) VALUES('pgsz', 32);
  WITH seq(s) AS ( SELECT 1 UNION ALL SELECT s+1 FROM seq WHERE s<50)
  INSERT INTO t1 SELECT 'x x x y y y', 'a b c d e f' FROM seq;
................................................................................
  INSERT INTO t4 VALUES('c1 c2 c3', 'c4 c5 c6', 'c7 c8 c9');
}

do_faultsim_test 4.1 -faults oom-t* -body {
  execsql { SELECT rowid, fts5_test_collist(t4) FROM t4('2') }
} -test {
  faultsim_test_result \
      {0 {1 {0.0 0.1 0.2} 2 {0.0 0.1 0.2} 3 {0.0 0.1 0.2}}} {1 SQLITE_NOMEM}

}

do_faultsim_test 4.2 -faults oom-t* -body {
  execsql { SELECT rowid, fts5_test_collist(t4) FROM t4('a5 OR b5 OR c5') }
} -test {
  faultsim_test_result \
      {0 {4 {0.0 0.1 0.2} 5 {1.0 1.1 1.2} 6 {2.0 2.1 2.2}}} {1 SQLITE_NOMEM}

}


#-------------------------------------------------------------------------
# An OOM within an "ORDER BY rank" query.
#
db func rnddoc fts5_rnddoc 

ifcapable !fts5 {
  finish_test
  return
}

foreach_detail_mode $testprefix {

if {"%DETAIL%" != "none"} continue

fts5_aux_test_functions db

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(a, b, detail=%DETAIL%);
  INSERT INTO t1(t1, rank) VALUES('pgsz', 32);
  WITH seq(s) AS ( SELECT 1 UNION ALL SELECT s+1 FROM seq WHERE s<50)
  INSERT INTO t1 SELECT 'x x x y y y', 'a b c d e f' FROM seq;
................................................................................
  INSERT INTO t4 VALUES('c1 c2 c3', 'c4 c5 c6', 'c7 c8 c9');
}

do_faultsim_test 4.1 -faults oom-t* -body {
  execsql { SELECT rowid, fts5_test_collist(t4) FROM t4('2') }
} -test {
  faultsim_test_result \
      {0 {1 {0.0 0.1 0.2} 2 {0.0 0.1 0.2} 3 {0.0 0.1 0.2}}} \
      {1 SQLITE_NOMEM} {1 SQLITE_ERROR} {1 {SQL logic error}}
}

do_faultsim_test 4.2 -faults oom-t* -body {
  execsql { SELECT rowid, fts5_test_collist(t4) FROM t4('a5 OR b5 OR c5') }
} -test {
  faultsim_test_result \
      {0 {4 {0.0 0.1 0.2} 5 {1.0 1.1 1.2} 6 {2.0 2.1 2.2}}} \
      {1 SQLITE_NOMEM} {1 SQLITE_ERROR} {1 {SQL logic error}}
}


#-------------------------------------------------------------------------
# An OOM within an "ORDER BY rank" query.
#
db func rnddoc fts5_rnddoc 

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  sqlite3_vfs *pOrig;
  SQLITE_EXTENSION_INIT2(pApi);


  pOrig = sqlite3_vfs_find(0);
  apnd_vfs.iVersion = pOrig->iVersion;
  apnd_vfs.pAppData = pOrig;
  apnd_vfs.szOsFile = pOrig->szOsFile + sizeof(ApndFile);
  rc = sqlite3_vfs_register(&apnd_vfs, 0);
#ifdef APPENDVFS_TEST
  if( rc==SQLITE_OK ){
    rc = sqlite3_auto_extension((void(*)(void))apndvfsRegister);
  }
#endif
  if( rc==SQLITE_OK ) rc = SQLITE_OK_LOAD_PERMANENTLY;
  return rc;
}

  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  sqlite3_vfs *pOrig;
  SQLITE_EXTENSION_INIT2(pApi);
  (void)pzErrMsg;
  (void)db;
  pOrig = sqlite3_vfs_find(0);
  apnd_vfs.iVersion = pOrig->iVersion;
  apnd_vfs.pAppData = pOrig;
  apnd_vfs.szOsFile = pOrig->szOsFile + sizeof(ApndFile);
  rc = sqlite3_vfs_register(&apnd_vfs, 0);
#ifdef APPENDVFS_TEST
  if( rc==SQLITE_OK ){
    rc = sqlite3_auto_extension((void(*)(void))apndvfsRegister);
  }
#endif
  if( rc==SQLITE_OK ) rc = SQLITE_OK_LOAD_PERMANENTLY;
  return rc;
}

  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  int i;
  int iMode = sqlite3_value_int(argv[0]);
  char z[16];

  if( S_ISLNK(iMode) ){
    z[0] = 'l';
  }else if( S_ISREG(iMode) ){
    z[0] = '-';
  }else if( S_ISDIR(iMode) ){
    z[0] = 'd';
  }else{
................................................................................
  void *pAux,
  int argc, const char *const*argv,
  sqlite3_vtab **ppVtab,
  char **pzErr
){
  fsdir_tab *pNew = 0;
  int rc;





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

/*
** Constructor for a new fsdir_cursor object.
*/
static int fsdirOpen(sqlite3_vtab *p, sqlite3_vtab_cursor **ppCursor){
  fsdir_cursor *pCur;

  pCur = sqlite3_malloc( sizeof(*pCur) );
  if( pCur==0 ) return SQLITE_NOMEM;
  memset(pCur, 0, sizeof(*pCur));
  pCur->iLvl = -1;
  *ppCursor = &pCur->base;
  return SQLITE_OK;
}
................................................................................
static int fsdirFilter(
  sqlite3_vtab_cursor *cur, 
  int idxNum, const char *idxStr,
  int argc, sqlite3_value **argv
){
  const char *zDir = 0;
  fsdir_cursor *pCur = (fsdir_cursor*)cur;

  fsdirResetCursor(pCur);

  if( idxNum==0 ){
    fsdirSetErrmsg(pCur, "table function fsdir requires an argument");
    return SQLITE_ERROR;
  }

................................................................................
static int fsdirBestIndex(
  sqlite3_vtab *tab,
  sqlite3_index_info *pIdxInfo
){
  int i;                 /* Loop over constraints */
  int idx4 = -1;
  int idx5 = -1;

  const struct sqlite3_index_constraint *pConstraint;


  pConstraint = pIdxInfo->aConstraint;
  for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
    if( pConstraint->usable==0 ) continue;
    if( pConstraint->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
    if( pConstraint->iColumn==4 ) idx4 = i;
    if( pConstraint->iColumn==5 ) idx5 = i;
  }
................................................................................
    0,                         /* xUpdate */
    0,                         /* xBegin */
    0,                         /* xSync */
    0,                         /* xCommit */
    0,                         /* xRollback */
    0,                         /* xFindMethod */
    0,                         /* xRename */



  };

  int rc = sqlite3_create_module(db, "fsdir", &fsdirModule, 0);
  return rc;
}
#else         /* SQLITE_OMIT_VIRTUALTABLE */
# define fsdirRegister(x) SQLITE_OK

  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  int i;
  int iMode = sqlite3_value_int(argv[0]);
  char z[16];
  (void)argc;
  if( S_ISLNK(iMode) ){
    z[0] = 'l';
  }else if( S_ISREG(iMode) ){
    z[0] = '-';
  }else if( S_ISDIR(iMode) ){
    z[0] = 'd';
  }else{
................................................................................
  void *pAux,
  int argc, const char *const*argv,
  sqlite3_vtab **ppVtab,
  char **pzErr
){
  fsdir_tab *pNew = 0;
  int rc;

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

/*
** Constructor for a new fsdir_cursor object.
*/
static int fsdirOpen(sqlite3_vtab *p, sqlite3_vtab_cursor **ppCursor){
  fsdir_cursor *pCur;
  (void)p;
  pCur = sqlite3_malloc( sizeof(*pCur) );
  if( pCur==0 ) return SQLITE_NOMEM;
  memset(pCur, 0, sizeof(*pCur));
  pCur->iLvl = -1;
  *ppCursor = &pCur->base;
  return SQLITE_OK;
}
................................................................................
static int fsdirFilter(
  sqlite3_vtab_cursor *cur, 
  int idxNum, const char *idxStr,
  int argc, sqlite3_value **argv
){
  const char *zDir = 0;
  fsdir_cursor *pCur = (fsdir_cursor*)cur;
  (void)idxStr;
  fsdirResetCursor(pCur);

  if( idxNum==0 ){
    fsdirSetErrmsg(pCur, "table function fsdir requires an argument");
    return SQLITE_ERROR;
  }

................................................................................
static int fsdirBestIndex(
  sqlite3_vtab *tab,
  sqlite3_index_info *pIdxInfo
){
  int i;                 /* Loop over constraints */
  int idx4 = -1;
  int idx5 = -1;

  const struct sqlite3_index_constraint *pConstraint;

  (void)tab;
  pConstraint = pIdxInfo->aConstraint;
  for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
    if( pConstraint->usable==0 ) continue;
    if( pConstraint->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
    if( pConstraint->iColumn==4 ) idx4 = i;
    if( pConstraint->iColumn==5 ) idx5 = i;
  }
................................................................................
    0,                         /* xUpdate */
    0,                         /* xBegin */
    0,                         /* xSync */
    0,                         /* xCommit */
    0,                         /* xRollback */
    0,                         /* xFindMethod */
    0,                         /* xRename */
    0,                         /* xSavepoint */
    0,                         /* xRelease */
    0                          /* xRollbackTo */
  };

  int rc = sqlite3_create_module(db, "fsdir", &fsdirModule, 0);
  return rc;
}
#else         /* SQLITE_OMIT_VIRTUALTABLE */
# define fsdirRegister(x) SQLITE_OK

  aOut = (u8*)sqlite3_malloc(nAlloc);
  if( aOut==0 ){
    rc = SQLITE_NOMEM;
  }else{
    int res;
    z_stream str;
    memset(&str, 0, sizeof(str));
    str.next_in = (z_const Bytef*)aIn;
    str.avail_in = nIn;
    str.next_out = aOut;
    str.avail_out = nAlloc;

    deflateInit2(&str, 9, Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY);
    res = deflate(&str, Z_FINISH);

................................................................................

      iMethod = sqlite3_value_int(apVal[8]);
      sz = nIn;
      pData = aIn;
      nData = nIn;
      if( iMethod!=0 && iMethod!=8 ){
        rc = SQLITE_CONSTRAINT;

      }else if( bAuto || iMethod ){
        int nCmp;
        rc = zipfileDeflate(pTab, aIn, nIn, &pFree, &nCmp);
        if( rc==SQLITE_OK ){
          if( iMethod || nCmp<nIn ){
            iMethod = 8;
            pData = pFree;
            nData = nCmp;

          }
        }
        iCrc32 = crc32(0, aIn, nIn);
      }
    }
  }

  aOut = (u8*)sqlite3_malloc(nAlloc);
  if( aOut==0 ){
    rc = SQLITE_NOMEM;
  }else{
    int res;
    z_stream str;
    memset(&str, 0, sizeof(str));
    str.next_in = (Bytef*)aIn;
    str.avail_in = nIn;
    str.next_out = aOut;
    str.avail_out = nAlloc;

    deflateInit2(&str, 9, Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY);
    res = deflate(&str, Z_FINISH);

................................................................................

      iMethod = sqlite3_value_int(apVal[8]);
      sz = nIn;
      pData = aIn;
      nData = nIn;
      if( iMethod!=0 && iMethod!=8 ){
        rc = SQLITE_CONSTRAINT;
      }else{
        if( bAuto || iMethod ){
          int nCmp;
          rc = zipfileDeflate(pTab, aIn, nIn, &pFree, &nCmp);
          if( rc==SQLITE_OK ){
            if( iMethod || nCmp<nIn ){
              iMethod = 8;
              pData = pFree;
              nData = nCmp;
            }
          }
        }
        iCrc32 = crc32(0, aIn, nIn);
      }
    }
  }

**   3. The remainder of the node contains the node entries. Each entry
**      consists of a single 8-byte integer followed by an even number
**      of 4-byte coordinates. For leaf nodes the integer is the rowid
**      of a record. For internal nodes it is the node number of a
**      child page.
*/

#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_RTREE)


#ifndef SQLITE_CORE
  #include "sqlite3ext.h"
  SQLITE_EXTENSION_INIT1
#else
  #include "sqlite3.h"
#endif

**   3. The remainder of the node contains the node entries. Each entry
**      consists of a single 8-byte integer followed by an even number
**      of 4-byte coordinates. For leaf nodes the integer is the rowid
**      of a record. For internal nodes it is the node number of a
**      child page.
*/

#if !defined(SQLITE_CORE) \
  || (defined(SQLITE_ENABLE_RTREE) && !defined(SQLITE_OMIT_VIRTUALTABLE))

#ifndef SQLITE_CORE
  #include "sqlite3ext.h"
  SQLITE_EXTENSION_INIT1
#else
  #include "sqlite3.h"
#endif

**
******************************************************************************
**
** This header file is used by programs that want to link against the
** RTREE library.  All it does is declare the sqlite3RtreeInit() interface.
*/
#include "sqlite3.h"





#ifdef __cplusplus
extern "C" {
#endif  /* __cplusplus */

int sqlite3RtreeInit(sqlite3 *db);

#ifdef __cplusplus
}  /* extern "C" */
#endif  /* __cplusplus */

**
******************************************************************************
**
** This header file is used by programs that want to link against the
** RTREE library.  All it does is declare the sqlite3RtreeInit() interface.
*/
#include "sqlite3.h"

#ifdef SQLITE_OMIT_VIRTUALTABLE
# undef SQLITE_ENABLE_RTREE
#endif

#ifdef __cplusplus
extern "C" {
#endif  /* __cplusplus */

int sqlite3RtreeInit(sqlite3 *db);

#ifdef __cplusplus
}  /* extern "C" */
#endif  /* __cplusplus */

# 2018 January 18
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
#

if {![info exists testdir]} {
  set testdir [file join [file dirname [info script]] .. .. test]
} 
source [file join [file dirname [info script]] session_common.tcl]
source $testdir/tester.tcl
ifcapable !session {finish_test; return}
set testprefix sessionH

forcedelete test.db2
sqlite3 db2 test.db2

do_test 1.0 {
  do_common_sql {
    CREATE TABLE t1(a, b, c, PRIMARY KEY(a, b));
  }
  do_then_apply_sql {
    WITH s(i) AS (
      VALUES(1) UNION ALL SELECT i+1 FROM s WHERe i<10000
    )
    INSERT INTO t1 SELECT 'abcde', randomblob(16), i FROM s;
  }
  compare_db db db2
} {}


finish_test

  do_test $tn.6.3 {
    sqlite3changeset_apply db $cinv xConflict
    execsql { SELECT * FROM t7 }
  } {1 1 ccc 2 2 ccc 3 3 ccc}
}]
}






finish_test

  do_test $tn.6.3 {
    sqlite3changeset_apply db $cinv xConflict
    execsql { SELECT * FROM t7 }
  } {1 1 ccc 2 2 ccc 3 3 ccc}
}]
}

catch { db close }
catch { db2 close }
sqlite3_shutdown
test_sqlite3_log

finish_test

do_execsql_test -db db2 2.4 {
  SELECT * FROM sqlite_stat1
} {
}

do_execsql_test -db db2 2.5 { SELECT count(*) FROM t1 } 32



























































































































































































finish_test

do_execsql_test -db db2 2.4 {
  SELECT * FROM sqlite_stat1
} {
}

do_execsql_test -db db2 2.5 { SELECT count(*) FROM t1 } 32

#-------------------------------------------------------------------------
db2 close
forcedelete test.db2
reset_db
sqlite3 db2 test.db2

do_test 3.0 {
  do_common_sql {
    CREATE TABLE t1(a, b, c);
    ANALYZE;
    DELETE FROM sqlite_stat1;
  }
  execsql {
    INSERT INTO t1 VALUES(1, 1, 1);
    INSERT INTO t1 VALUES(2, 2, 2);
    INSERT INTO t1 VALUES(3, 3, 3);
    INSERT INTO t1 VALUES(4, 4, 4);
  }
} {} 

do_iterator_test 3.1 {} {
  ANALYZE
} {
  {INSERT sqlite_stat1 0 XX. {} {t t1 b {} t 4}}
}
db null null
db2 null null
do_execsql_test 3.2 {
  SELECT * FROM sqlite_stat1;
} {t1 null 4}
do_test 3.3 {
  execsql { DELETE FROM sqlite_stat1 }
  do_then_apply_sql { ANALYZE }
  execsql { SELECT * FROM sqlite_stat1 } db2
} {t1 null 4}
do_test 3.4 {
  execsql { INSERT INTO t1 VALUES(5,5,5) }
  do_then_apply_sql { ANALYZE }
  execsql { SELECT * FROM sqlite_stat1 } db2
} {t1 null 5}
do_test 3.5 {
  do_then_apply_sql { DROP TABLE t1 }
  execsql { SELECT * FROM sqlite_stat1 } db2
} {}

do_test 3.6.1 {
  execsql { 
    CREATE TABLE t1(a, b, c);
    CREATE TABLE t2(x, y, z);
    INSERT INTO t1 VALUES(1,1,1), (2,2,2), (3,3,3), (4,4,4), (5,5,5);
    INSERT INTO t2 SELECT * FROM t1;
    DELETE FROM sqlite_stat1;
  }
  sqlite3session S db main
  S attach sqlite_stat1
  execsql { ANALYZE }
} {}
do_changeset_test 3.6.2 S {
  {INSERT sqlite_stat1 0 XX. {} {t t2 b {} t 5}}
  {INSERT sqlite_stat1 0 XX. {} {t t1 b {} t 5}}
}
do_changeset_invert_test 3.6.3 S {
  {DELETE sqlite_stat1 0 XX. {t t2 b {} t 5} {}}
  {DELETE sqlite_stat1 0 XX. {t t1 b {} t 5} {}}
}
do_test 3.6.4 { S delete } {}

proc sql_changeset_concat {args} {
  foreach sql $args {
    sqlite3session S db main
    S attach sqlite_stat1
    execsql $sql
    set change [S changeset]
    S delete

    if {[info vars ret]!=""} {
      set ret [sqlite3changeset_concat $ret $change]
    } else {
      set ret $change
    }
  }

  changeset_to_list $ret
}

proc do_scc_test {tn args} {
  uplevel [list \
    do_test $tn [concat sql_changeset_concat [lrange $args 0 end-1]] \
    [list {*}[ lindex $args end ]]
  ]
}

do_execsql_test 3.7.0 {
  DELETE FROM sqlite_stat1;
}
do_scc_test 3.7.1 {
  ANALYZE;
} {
  INSERT INTO t2 VALUES(6,6,6);
  ANALYZE;
} {
  {INSERT sqlite_stat1 0 XX. {} {t t1 b {} t 5}}
  {INSERT sqlite_stat1 0 XX. {} {t t2 b {} t 6}}
}

#-------------------------------------------------------------------------
catch { db2 close }
reset_db
forcedelete test.db2
sqlite3 db2 test.db2

do_test 4.1.0 {
  do_common_sql {
    CREATE TABLE t1(a, b);
    CREATE INDEX i1 ON t1(a);
    CREATE INDEX i2 ON t1(b);
    INSERT INTO t1 VALUES(1,1), (2,2);
    ANALYZE;
  }
  execsql { DELETE FROM sqlite_stat1 }
} {}

do_test 4.1.1 {
  execsql { INSERT INTO t1 VALUES(3,3); }
  set C [changeset_from_sql {ANALYZE}]
  set ::c [list]
  proc xConflict {args} {
    lappend ::c $args
    return "OMIT"
  }
  sqlite3changeset_apply db2 $C xConflict
  set ::c
} [list {*}{
  {INSERT sqlite_stat1 CONFLICT {t t1 t i1 t {3 1}} {t t1 t i1 t {2 1}}}
  {INSERT sqlite_stat1 CONFLICT {t t1 t i2 t {3 1}} {t t1 t i2 t {2 1}}}
}]

do_execsql_test -db db2 4.1.2 {
  SELECT * FROM sqlite_stat1 ORDER BY 1,2;
} {t1 i1 {2 1} t1 i2 {2 1}}

do_test 4.1.3 {
  proc xConflict {args} {
    return "REPLACE"
  }
  sqlite3changeset_apply db2 $C xConflict
  execsql { SELECT * FROM sqlite_stat1 ORDER BY 1,2 } db2
} {t1 i1 {3 1} t1 i2 {3 1}}

do_test 4.2.0 {
  do_common_sql { 
    DROP TABLE t1;
    CREATE TABLE t3(x,y);
    INSERT INTO t3 VALUES('a','a');
    INSERT INTO t3 VALUES('b','b');
    ANALYZE;
  }
  execsql { DELETE FROM sqlite_stat1 }
} {}
do_test 4.2.1 {
  execsql { INSERT INTO t3 VALUES('c','c'); }
  set C [changeset_from_sql {ANALYZE}]
  set ::c [list]
  proc xConflict {args} {
    lappend ::c $args
    return "OMIT"
  }
  sqlite3changeset_apply db2 $C xConflict
  set ::c
} [list {*}{
  {INSERT sqlite_stat1 CONFLICT {t t3 b {} t 3} {t t3 b {} t 2}}
}]

db2 null null
do_execsql_test -db db2 4.2.2 {
  SELECT * FROM sqlite_stat1 ORDER BY 1,2;
} {t3 null 2}

do_test 4.2.3 {
  proc xConflict {args} {
    return "REPLACE"
  }
  sqlite3changeset_apply db2 $C xConflict
  execsql { SELECT * FROM sqlite_stat1 ORDER BY 1,2 } db2
} {t3 null 3}

finish_test

  char *zDb;                      /* Name of database session is attached to */
  int bEnable;                    /* True if currently recording */
  int bIndirect;                  /* True if all changes are indirect */
  int bAutoAttach;                /* True to auto-attach tables */
  int rc;                         /* Non-zero if an error has occurred */
  void *pFilterCtx;               /* First argument to pass to xTableFilter */
  int (*xTableFilter)(void *pCtx, const char *zTab);

  sqlite3_session *pNext;         /* Next session object on same db. */
  SessionTable *pTable;           /* List of attached tables */
  SessionHook hook;               /* APIs to grab new and old data with */
};

/*
** Instances of this structure are used to build strings or binary records.
................................................................................
** a subset of the initial values that the modified row contained at the
** start of the session. Or no initial values if the row was inserted.
*/
struct SessionTable {
  SessionTable *pNext;
  char *zName;                    /* Local name of table */
  int nCol;                       /* Number of columns in table zName */

  const char **azCol;             /* Column names */
  u8 *abPK;                       /* Array of primary key flags */
  int nEntry;                     /* Total number of entries in hash table */
  int nChange;                    /* Size of apChange[] array */
  SessionChange **apChange;       /* Hash table buckets */
};

................................................................................
          z = (const u8 *)sqlite3_value_blob(pVal);
        }
        n = sqlite3_value_bytes(pVal);
        if( !z && (eType!=SQLITE_BLOB || n>0) ) return SQLITE_NOMEM;
        h = sessionHashAppendBlob(h, n, z);
      }else{
        assert( eType==SQLITE_NULL );

        *pbNullPK = 1;
      }
    }
  }

  *piHash = (h % pTab->nChange);
  return SQLITE_OK;
................................................................................
        if( eType==SQLITE_TEXT ){
          z = sqlite3_value_text(pVal);
        }else{
          z = sqlite3_value_blob(pVal);
        }
        if( memcmp(a, z, n) ) return 0;
        a += n;
        break;
      }
    }
  }

  return 1;
}

................................................................................
      int i;
      for(i=0; i<pTab->nCol; i++){
        if( abPK[i] ){
          pTab->abPK = abPK;
          break;
        }
      }


    }
  }

  return (pSession->rc || pTab->abPK==0);
}










































/*
** This function is only called from with a pre-update-hook reporting a 
** change on table pTab (attached to session pSession). The type of change
** (UPDATE, INSERT, DELETE) is specified by the first argument.
**
** Unless one is already present or an error occurs, an entry is added
................................................................................
  int op,                         /* One of SQLITE_UPDATE, INSERT, DELETE */
  sqlite3_session *pSession,      /* Session object pTab is attached to */
  SessionTable *pTab              /* Table that change applies to */
){
  int iHash; 
  int bNull = 0; 
  int rc = SQLITE_OK;


  if( pSession->rc ) return;

  /* Load table details if required */
  if( sessionInitTable(pSession, pTab) ) return;

  /* Check the number of columns in this xPreUpdate call matches the 
................................................................................
  }

  /* Grow the hash table if required */
  if( sessionGrowHash(0, pTab) ){
    pSession->rc = SQLITE_NOMEM;
    return;
  }




















  /* Calculate the hash-key for this change. If the primary key of the row
  ** includes a NULL value, exit early. Such changes are ignored by the
  ** session module. */
  rc = sessionPreupdateHash(pSession, pTab, op==SQLITE_INSERT, &iHash, &bNull);
  if( rc!=SQLITE_OK ) goto error_out;

................................................................................
        pC->bIndirect = 0;
      }
    }
  }

  /* If an error has occurred, mark the session object as failed. */
 error_out:



  if( rc!=SQLITE_OK ){
    pSession->rc = rc;
  }
}

static int sessionFindTable(
  sqlite3_session *pSession, 
................................................................................
    if( (*pp)==pSession ){
      *pp = (*pp)->pNext;
      if( pHead ) sqlite3_preupdate_hook(db, xPreUpdate, (void*)pHead);
      break;
    }
  }
  sqlite3_mutex_leave(sqlite3_db_mutex(db));


  /* Delete all attached table objects. And the contents of their 
  ** associated hash-tables. */
  sessionDeleteTable(pSession->pTable);

  /* Free the session object itself. */
  sqlite3_free(pSession);
................................................................................
  const char *zTab,               /* Table name */
  int nCol,                       /* Number of columns in table */
  const char **azCol,             /* Names of table columns */
  u8 *abPK,                       /* PRIMARY KEY  array */
  sqlite3_stmt **ppStmt           /* OUT: Prepared SELECT statement */
){
  int rc = SQLITE_OK;









  int i;
  const char *zSep = "";
  SessionBuffer buf = {0, 0, 0};

  sessionAppendStr(&buf, "SELECT * FROM ", &rc);
  sessionAppendIdent(&buf, zDb, &rc);
  sessionAppendStr(&buf, ".", &rc);
  sessionAppendIdent(&buf, zTab, &rc);
  sessionAppendStr(&buf, " WHERE ", &rc);
  for(i=0; i<nCol; i++){
    if( abPK[i] ){
      sessionAppendStr(&buf, zSep, &rc);
      sessionAppendIdent(&buf, azCol[i], &rc);
      sessionAppendStr(&buf, " = ?", &rc);
      sessionAppendInteger(&buf, i+1, &rc);
      zSep = " AND ";
    }
  }




  if( rc==SQLITE_OK ){
    rc = sqlite3_prepare_v2(db, (char *)buf.aBuf, buf.nBuf, ppStmt, 0);
  }
  sqlite3_free(buf.aBuf);
  return rc;
}

/*
** Bind the PRIMARY KEY values from the change passed in argument pChange
** to the SELECT statement passed as the first argument. The SELECT statement
** is as prepared by function sessionSelectStmt().
................................................................................
  sqlite3_stmt *pDelete;          /* DELETE statement */
  sqlite3_stmt *pUpdate;          /* UPDATE statement */
  sqlite3_stmt *pInsert;          /* INSERT statement */
  sqlite3_stmt *pSelect;          /* SELECT statement */
  int nCol;                       /* Size of azCol[] and abPK[] arrays */
  const char **azCol;             /* Array of column names */
  u8 *abPK;                       /* Boolean array - true if column is in PK */

  int bDeferConstraints;          /* True to defer constraints */
  SessionBuffer constraints;      /* Deferred constraints are stored here */
};

/*
** Formulate a statement to DELETE a row from database db. Assuming a table
** structure like this:
................................................................................
  if( rc==SQLITE_OK ){
    rc = sqlite3_prepare_v2(db, (char *)buf.aBuf, buf.nBuf, &p->pUpdate, 0);
  }
  sqlite3_free(buf.aBuf);

  return rc;
}


/*
** Formulate and prepare an SQL statement to query table zTab by primary
** key. Assuming the following table structure:
**
**     CREATE TABLE x(a, b, c, d, PRIMARY KEY(a, c));
**
................................................................................

  if( rc==SQLITE_OK ){
    rc = sqlite3_prepare_v2(db, (char *)buf.aBuf, buf.nBuf, &p->pInsert, 0);
  }
  sqlite3_free(buf.aBuf);
  return rc;
}










































/*
** A wrapper around sqlite3_bind_value() that detects an extra problem. 
** See comments in the body of this function for details.
*/
static int sessionBindValue(
  sqlite3_stmt *pStmt,            /* Statement to bind value to */
................................................................................
      rc = sessionConflictHandler(
          SQLITE_CHANGESET_CONFLICT, p, pIter, xConflict, pCtx, 0
      );
    }

  }else{
    assert( op==SQLITE_INSERT );












    rc = sessionBindRow(pIter, sqlite3changeset_new, nCol, 0, p->pInsert);
    if( rc!=SQLITE_OK ) return rc;

    sqlite3_step(p->pInsert);
    rc = sqlite3_reset(p->pInsert);


    if( (rc&0xff)==SQLITE_CONSTRAINT ){
      rc = sessionConflictHandler(
          SQLITE_CHANGESET_CONFLICT, p, pIter, xConflict, pCtx, pbReplace
      );
    }
  }

................................................................................
          schemaMismatch = 1;
          sqlite3_log(SQLITE_SCHEMA, "sqlite3changeset_apply(): "
              "primary key mismatch for table %s", zTab
          );
        }
        else{
          sApply.nCol = nCol;






          if((rc = sessionSelectRow(db, zTab, &sApply))
          || (rc = sessionUpdateRow(db, zTab, &sApply))
          || (rc = sessionDeleteRow(db, zTab, &sApply))
          || (rc = sessionInsertRow(db, zTab, &sApply))
          ){
            break;


          }
        }
        nTab = sqlite3Strlen30(zTab);
      }
    }

    /* If there is a schema mismatch on the current table, proceed to the

  char *zDb;                      /* Name of database session is attached to */
  int bEnable;                    /* True if currently recording */
  int bIndirect;                  /* True if all changes are indirect */
  int bAutoAttach;                /* True to auto-attach tables */
  int rc;                         /* Non-zero if an error has occurred */
  void *pFilterCtx;               /* First argument to pass to xTableFilter */
  int (*xTableFilter)(void *pCtx, const char *zTab);
  sqlite3_value *pZeroBlob;       /* Value containing X'' */
  sqlite3_session *pNext;         /* Next session object on same db. */
  SessionTable *pTable;           /* List of attached tables */
  SessionHook hook;               /* APIs to grab new and old data with */
};

/*
** Instances of this structure are used to build strings or binary records.
................................................................................
** a subset of the initial values that the modified row contained at the
** start of the session. Or no initial values if the row was inserted.
*/
struct SessionTable {
  SessionTable *pNext;
  char *zName;                    /* Local name of table */
  int nCol;                       /* Number of columns in table zName */
  int bStat1;                     /* True if this is sqlite_stat1 */
  const char **azCol;             /* Column names */
  u8 *abPK;                       /* Array of primary key flags */
  int nEntry;                     /* Total number of entries in hash table */
  int nChange;                    /* Size of apChange[] array */
  SessionChange **apChange;       /* Hash table buckets */
};

................................................................................
          z = (const u8 *)sqlite3_value_blob(pVal);
        }
        n = sqlite3_value_bytes(pVal);
        if( !z && (eType!=SQLITE_BLOB || n>0) ) return SQLITE_NOMEM;
        h = sessionHashAppendBlob(h, n, z);
      }else{
        assert( eType==SQLITE_NULL );
        assert( pTab->bStat1==0 || i!=1 );
        *pbNullPK = 1;
      }
    }
  }

  *piHash = (h % pTab->nChange);
  return SQLITE_OK;
................................................................................
        if( eType==SQLITE_TEXT ){
          z = sqlite3_value_text(pVal);
        }else{
          z = sqlite3_value_blob(pVal);
        }
        if( memcmp(a, z, n) ) return 0;
        a += n;

      }
    }
  }

  return 1;
}

................................................................................
      int i;
      for(i=0; i<pTab->nCol; i++){
        if( abPK[i] ){
          pTab->abPK = abPK;
          break;
        }
      }
      if( 0==sqlite3_stricmp("sqlite_stat1", pTab->zName) ){
        pTab->bStat1 = 1;
      }
    }
  }
  return (pSession->rc || pTab->abPK==0);
}

/*
** Versions of the four methods in object SessionHook for use with the
** sqlite_stat1 table. The purpose of this is to substitute a zero-length
** blob each time a NULL value is read from the "idx" column of the
** sqlite_stat1 table.
*/
typedef struct SessionStat1Ctx SessionStat1Ctx;
struct SessionStat1Ctx {
  SessionHook hook;
  sqlite3_session *pSession;
};
static int sessionStat1Old(void *pCtx, int iCol, sqlite3_value **ppVal){
  SessionStat1Ctx *p = (SessionStat1Ctx*)pCtx;
  sqlite3_value *pVal = 0;
  int rc = p->hook.xOld(p->hook.pCtx, iCol, &pVal);
  if( rc==SQLITE_OK && iCol==1 && sqlite3_value_type(pVal)==SQLITE_NULL ){
    pVal = p->pSession->pZeroBlob;
  }
  *ppVal = pVal;
  return rc;
}
static int sessionStat1New(void *pCtx, int iCol, sqlite3_value **ppVal){
  SessionStat1Ctx *p = (SessionStat1Ctx*)pCtx;
  sqlite3_value *pVal = 0;
  int rc = p->hook.xNew(p->hook.pCtx, iCol, &pVal);
  if( rc==SQLITE_OK && iCol==1 && sqlite3_value_type(pVal)==SQLITE_NULL ){
    pVal = p->pSession->pZeroBlob;
  }
  *ppVal = pVal;
  return rc;
}
static int sessionStat1Count(void *pCtx){
  SessionStat1Ctx *p = (SessionStat1Ctx*)pCtx;
  return p->hook.xCount(p->hook.pCtx);
}
static int sessionStat1Depth(void *pCtx){
  SessionStat1Ctx *p = (SessionStat1Ctx*)pCtx;
  return p->hook.xDepth(p->hook.pCtx);
}


/*
** This function is only called from with a pre-update-hook reporting a 
** change on table pTab (attached to session pSession). The type of change
** (UPDATE, INSERT, DELETE) is specified by the first argument.
**
** Unless one is already present or an error occurs, an entry is added
................................................................................
  int op,                         /* One of SQLITE_UPDATE, INSERT, DELETE */
  sqlite3_session *pSession,      /* Session object pTab is attached to */
  SessionTable *pTab              /* Table that change applies to */
){
  int iHash; 
  int bNull = 0; 
  int rc = SQLITE_OK;
  SessionStat1Ctx stat1;

  if( pSession->rc ) return;

  /* Load table details if required */
  if( sessionInitTable(pSession, pTab) ) return;

  /* Check the number of columns in this xPreUpdate call matches the 
................................................................................
  }

  /* Grow the hash table if required */
  if( sessionGrowHash(0, pTab) ){
    pSession->rc = SQLITE_NOMEM;
    return;
  }

  if( pTab->bStat1 ){
    stat1.hook = pSession->hook;
    stat1.pSession = pSession;
    pSession->hook.pCtx = (void*)&stat1;
    pSession->hook.xNew = sessionStat1New;
    pSession->hook.xOld = sessionStat1Old;
    pSession->hook.xCount = sessionStat1Count;
    pSession->hook.xDepth = sessionStat1Depth;
    if( pSession->pZeroBlob==0 ){
      sqlite3_value *p = sqlite3ValueNew(0);
      if( p==0 ){
        rc = SQLITE_NOMEM;
        goto error_out;
      }
      sqlite3ValueSetStr(p, 0, "", 0, SQLITE_STATIC);
      pSession->pZeroBlob = p;
    }
  }

  /* Calculate the hash-key for this change. If the primary key of the row
  ** includes a NULL value, exit early. Such changes are ignored by the
  ** session module. */
  rc = sessionPreupdateHash(pSession, pTab, op==SQLITE_INSERT, &iHash, &bNull);
  if( rc!=SQLITE_OK ) goto error_out;

................................................................................
        pC->bIndirect = 0;
      }
    }
  }

  /* If an error has occurred, mark the session object as failed. */
 error_out:
  if( pTab->bStat1 ){
    pSession->hook = stat1.hook;
  }
  if( rc!=SQLITE_OK ){
    pSession->rc = rc;
  }
}

static int sessionFindTable(
  sqlite3_session *pSession, 
................................................................................
    if( (*pp)==pSession ){
      *pp = (*pp)->pNext;
      if( pHead ) sqlite3_preupdate_hook(db, xPreUpdate, (void*)pHead);
      break;
    }
  }
  sqlite3_mutex_leave(sqlite3_db_mutex(db));
  sqlite3ValueFree(pSession->pZeroBlob);

  /* Delete all attached table objects. And the contents of their 
  ** associated hash-tables. */
  sessionDeleteTable(pSession->pTable);

  /* Free the session object itself. */
  sqlite3_free(pSession);
................................................................................
  const char *zTab,               /* Table name */
  int nCol,                       /* Number of columns in table */
  const char **azCol,             /* Names of table columns */
  u8 *abPK,                       /* PRIMARY KEY  array */
  sqlite3_stmt **ppStmt           /* OUT: Prepared SELECT statement */
){
  int rc = SQLITE_OK;
  char *zSql = 0;
  int nSql = -1;

  if( 0==sqlite3_stricmp("sqlite_stat1", zTab) ){
    zSql = sqlite3_mprintf(
        "SELECT tbl, ?2, stat FROM %Q.sqlite_stat1 WHERE tbl IS ?1 AND "
        "idx IS (CASE WHEN ?2=X'' THEN NULL ELSE ?2 END)", zDb
    );
  }else{
    int i;
    const char *zSep = "";
    SessionBuffer buf = {0, 0, 0};

    sessionAppendStr(&buf, "SELECT * FROM ", &rc);
    sessionAppendIdent(&buf, zDb, &rc);
    sessionAppendStr(&buf, ".", &rc);
    sessionAppendIdent(&buf, zTab, &rc);
    sessionAppendStr(&buf, " WHERE ", &rc);
    for(i=0; i<nCol; i++){
      if( abPK[i] ){
        sessionAppendStr(&buf, zSep, &rc);
        sessionAppendIdent(&buf, azCol[i], &rc);
        sessionAppendStr(&buf, " IS ?", &rc);
        sessionAppendInteger(&buf, i+1, &rc);
        zSep = " AND ";
      }
    }
    zSql = (char*)buf.aBuf;
    nSql = buf.nBuf;
  }

  if( rc==SQLITE_OK ){
    rc = sqlite3_prepare_v2(db, zSql, nSql, ppStmt, 0);
  }
  sqlite3_free(zSql);
  return rc;
}

/*
** Bind the PRIMARY KEY values from the change passed in argument pChange
** to the SELECT statement passed as the first argument. The SELECT statement
** is as prepared by function sessionSelectStmt().
................................................................................
  sqlite3_stmt *pDelete;          /* DELETE statement */
  sqlite3_stmt *pUpdate;          /* UPDATE statement */
  sqlite3_stmt *pInsert;          /* INSERT statement */
  sqlite3_stmt *pSelect;          /* SELECT statement */
  int nCol;                       /* Size of azCol[] and abPK[] arrays */
  const char **azCol;             /* Array of column names */
  u8 *abPK;                       /* Boolean array - true if column is in PK */
  int bStat1;                     /* True if table is sqlite_stat1 */
  int bDeferConstraints;          /* True to defer constraints */
  SessionBuffer constraints;      /* Deferred constraints are stored here */
};

/*
** Formulate a statement to DELETE a row from database db. Assuming a table
** structure like this:
................................................................................
  if( rc==SQLITE_OK ){
    rc = sqlite3_prepare_v2(db, (char *)buf.aBuf, buf.nBuf, &p->pUpdate, 0);
  }
  sqlite3_free(buf.aBuf);

  return rc;
}


/*
** Formulate and prepare an SQL statement to query table zTab by primary
** key. Assuming the following table structure:
**
**     CREATE TABLE x(a, b, c, d, PRIMARY KEY(a, c));
**
................................................................................

  if( rc==SQLITE_OK ){
    rc = sqlite3_prepare_v2(db, (char *)buf.aBuf, buf.nBuf, &p->pInsert, 0);
  }
  sqlite3_free(buf.aBuf);
  return rc;
}

static int sessionPrepare(sqlite3 *db, sqlite3_stmt **pp, const char *zSql){
  return sqlite3_prepare_v2(db, zSql, -1, pp, 0);
}

/*
** Prepare statements for applying changes to the sqlite_stat1 table.
** These are similar to those created by sessionSelectRow(),
** sessionInsertRow(), sessionUpdateRow() and sessionDeleteRow() for 
** other tables.
*/
static int sessionStat1Sql(sqlite3 *db, SessionApplyCtx *p){
  int rc = sessionSelectRow(db, "sqlite_stat1", p);
  if( rc==SQLITE_OK ){
    rc = sessionPrepare(db, &p->pInsert,
        "INSERT INTO main.sqlite_stat1 VALUES(?1, "
        "CASE WHEN length(?2)=0 AND typeof(?2)='blob' THEN NULL ELSE ?2 END, "
        "?3)"
    );
  }
  if( rc==SQLITE_OK ){
    rc = sessionPrepare(db, &p->pUpdate,
        "UPDATE main.sqlite_stat1 SET "
        "tbl = CASE WHEN ?2 THEN ?3 ELSE tbl END, "
        "idx = CASE WHEN ?5 THEN ?6 ELSE idx END, "
        "stat = CASE WHEN ?8 THEN ?9 ELSE stat END  "
        "WHERE tbl=?1 AND idx IS "
        "CASE WHEN length(?4)=0 AND typeof(?4)='blob' THEN NULL ELSE ?4 END "
        "AND (?10 OR ?8=0 OR stat IS ?7)"
    );
  }
  if( rc==SQLITE_OK ){
    rc = sessionPrepare(db, &p->pDelete,
        "DELETE FROM main.sqlite_stat1 WHERE tbl=?1 AND idx IS "
        "CASE WHEN length(?2)=0 AND typeof(?2)='blob' THEN NULL ELSE ?2 END "
        "AND (?4 OR stat IS ?3)"
    );
  }
  assert( rc==SQLITE_OK );
  return rc;
}

/*
** A wrapper around sqlite3_bind_value() that detects an extra problem. 
** See comments in the body of this function for details.
*/
static int sessionBindValue(
  sqlite3_stmt *pStmt,            /* Statement to bind value to */
................................................................................
      rc = sessionConflictHandler(
          SQLITE_CHANGESET_CONFLICT, p, pIter, xConflict, pCtx, 0
      );
    }

  }else{
    assert( op==SQLITE_INSERT );
    if( p->bStat1 ){
      /* Check if there is a conflicting row. For sqlite_stat1, this needs
      ** to be done using a SELECT, as there is no PRIMARY KEY in the 
      ** database schema to throw an exception if a duplicate is inserted.  */
      rc = sessionSeekToRow(p->db, pIter, p->abPK, p->pSelect);
      if( rc==SQLITE_ROW ){
        rc = SQLITE_CONSTRAINT;
        sqlite3_reset(p->pSelect);
      }
    }

    if( rc==SQLITE_OK ){
      rc = sessionBindRow(pIter, sqlite3changeset_new, nCol, 0, p->pInsert);
      if( rc!=SQLITE_OK ) return rc;

      sqlite3_step(p->pInsert);
      rc = sqlite3_reset(p->pInsert);
    }

    if( (rc&0xff)==SQLITE_CONSTRAINT ){
      rc = sessionConflictHandler(
          SQLITE_CHANGESET_CONFLICT, p, pIter, xConflict, pCtx, pbReplace
      );
    }
  }

................................................................................
          schemaMismatch = 1;
          sqlite3_log(SQLITE_SCHEMA, "sqlite3changeset_apply(): "
              "primary key mismatch for table %s", zTab
          );
        }
        else{
          sApply.nCol = nCol;
          if( 0==sqlite3_stricmp(zTab, "sqlite_stat1") ){
            if( (rc = sessionStat1Sql(db, &sApply) ) ){
              break;
            }
            sApply.bStat1 = 1;
          }else{
            if((rc = sessionSelectRow(db, zTab, &sApply))
                || (rc = sessionUpdateRow(db, zTab, &sApply))
                || (rc = sessionDeleteRow(db, zTab, &sApply))
                || (rc = sessionInsertRow(db, zTab, &sApply))
              ){
              break;
            }
            sApply.bStat1 = 0;
          }
        }
        nTab = sqlite3Strlen30(zTab);
      }
    }

    /* If there is a schema mismatch on the current table, proceed to the

** no changes will be recorded in either of these scenarios.
**
** Changes are not recorded for individual rows that have NULL values stored
** in one or more of their PRIMARY KEY columns.
**
** SQLITE_OK is returned if the call completes without error. Or, if an error 
** occurs, an SQLite error code (e.g. SQLITE_NOMEM) is returned.





























*/
int sqlite3session_attach(
  sqlite3_session *pSession,      /* Session object */
  const char *zTab                /* Table name */
);

/*

** no changes will be recorded in either of these scenarios.
**
** Changes are not recorded for individual rows that have NULL values stored
** in one or more of their PRIMARY KEY columns.
**
** SQLITE_OK is returned if the call completes without error. Or, if an error 
** occurs, an SQLite error code (e.g. SQLITE_NOMEM) is returned.
**
** <h3>Special sqlite_stat1 Handling</h3>
**
** As of SQLite version 3.22.0, the "sqlite_stat1" table is an exception to 
** some of the rules above. In SQLite, the schema of sqlite_stat1 is:
**  <pre>
**  &nbsp;     CREATE TABLE sqlite_stat1(tbl,idx,stat)  
**  </pre>
**
** Even though sqlite_stat1 does not have a PRIMARY KEY, changes are 
** recorded for it as if the PRIMARY KEY is (tbl,idx). Additionally, changes 
** are recorded for rows for which (idx IS NULL) is true. However, for such
** rows a zero-length blob (SQL value X'') is stored in the changeset or
** patchset instead of a NULL value. This allows such changesets to be
** manipulated by legacy implementations of sqlite3changeset_invert(),
** concat() and similar.
**
** The sqlite3changeset_apply() function automatically converts the 
** zero-length blob back to a NULL value when updating the sqlite_stat1
** table. However, if the application calls sqlite3changeset_new(),
** sqlite3changeset_old() or sqlite3changeset_conflict on a changeset 
** iterator directly (including on a changeset iterator passed to a
** conflict-handler callback) then the X'' value is returned. The application
** must translate X'' to NULL itself if required.
**
** Legacy (older than 3.22.0) versions of the sessions module cannot capture
** changes made to the sqlite_stat1 table. Legacy versions of the
** sqlite3changeset_apply() function silently ignore any modifications to the
** sqlite_stat1 table that are part of a changeset or patchset.
*/
int sqlite3session_attach(
  sqlite3_session *pSession,      /* Session object */
  const char *zTab                /* Table name */
);

/*

  $(TOP)/ext/misc/totype.c \
  $(TOP)/ext/misc/unionvtab.c \
  $(TOP)/ext/misc/wholenumber.c \
  $(TOP)/ext/misc/vfslog.c \
  $(TOP)/ext/misc/zipfile.c \
  $(TOP)/ext/fts5/fts5_tcl.c \
  $(TOP)/ext/fts5/fts5_test_mi.c \
  $(TOP)/ext/fts5/fts5_test_tok.c 


#TESTSRC += $(TOP)/ext/fts2/fts2_tokenizer.c
#TESTSRC += $(TOP)/ext/fts3/fts3_tokenizer.c

TESTSRC2 = \
  $(TOP)/src/attach.c \
................................................................................
  parse.c \
  $(TOP)/ext/fts3/fts3.c \
  $(TOP)/ext/fts3/fts3_aux.c \
  $(TOP)/ext/fts3/fts3_expr.c \
  $(TOP)/ext/fts3/fts3_tokenizer.c \
  $(TOP)/ext/fts3/fts3_write.c \
  $(TOP)/ext/async/sqlite3async.c \

  $(TOP)/ext/session/sqlite3session.c \
  $(TOP)/ext/session/test_session.c 

# Header files used by all library source files.
#
HDR = \
   $(TOP)/src/btree.h \

  $(TOP)/ext/misc/totype.c \
  $(TOP)/ext/misc/unionvtab.c \
  $(TOP)/ext/misc/wholenumber.c \
  $(TOP)/ext/misc/vfslog.c \
  $(TOP)/ext/misc/zipfile.c \
  $(TOP)/ext/fts5/fts5_tcl.c \
  $(TOP)/ext/fts5/fts5_test_mi.c \
  $(TOP)/ext/fts5/fts5_test_tok.c


#TESTSRC += $(TOP)/ext/fts2/fts2_tokenizer.c
#TESTSRC += $(TOP)/ext/fts3/fts3_tokenizer.c

TESTSRC2 = \
  $(TOP)/src/attach.c \
................................................................................
  parse.c \
  $(TOP)/ext/fts3/fts3.c \
  $(TOP)/ext/fts3/fts3_aux.c \
  $(TOP)/ext/fts3/fts3_expr.c \
  $(TOP)/ext/fts3/fts3_tokenizer.c \
  $(TOP)/ext/fts3/fts3_write.c \
  $(TOP)/ext/async/sqlite3async.c \
  $(TOP)/ext/misc/stmt.c \
  $(TOP)/ext/session/sqlite3session.c \
  $(TOP)/ext/session/test_session.c 

# Header files used by all library source files.
#
HDR = \
   $(TOP)/src/btree.h \

    jZeroRows = sqlite3VdbeAddOp1(v, OP_IfNot, regStat1); VdbeCoverage(v);
    sqlite3VdbeAddOp2(v, OP_Null, 0, regIdxname);
    assert( "BBB"[0]==SQLITE_AFF_TEXT );
    sqlite3VdbeAddOp4(v, OP_MakeRecord, regTabname, 3, regTemp, "BBB", 0);
    sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur, regNewRowid);
    sqlite3VdbeAddOp3(v, OP_Insert, iStatCur, regTemp, regNewRowid);
    sqlite3VdbeChangeP5(v, OPFLAG_APPEND);



    sqlite3VdbeJumpHere(v, jZeroRows);
  }
}


/*
** Generate code that will cause the most recent index analysis to

    jZeroRows = sqlite3VdbeAddOp1(v, OP_IfNot, regStat1); VdbeCoverage(v);
    sqlite3VdbeAddOp2(v, OP_Null, 0, regIdxname);
    assert( "BBB"[0]==SQLITE_AFF_TEXT );
    sqlite3VdbeAddOp4(v, OP_MakeRecord, regTabname, 3, regTemp, "BBB", 0);
    sqlite3VdbeAddOp2(v, OP_NewRowid, iStatCur, regNewRowid);
    sqlite3VdbeAddOp3(v, OP_Insert, iStatCur, regTemp, regNewRowid);
    sqlite3VdbeChangeP5(v, OPFLAG_APPEND);
#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
    sqlite3VdbeChangeP4(v, -1, (char*)pStat1, P4_TABLE);
#endif
    sqlite3VdbeJumpHere(v, jZeroRows);
  }
}


/*
** Generate code that will cause the most recent index analysis to

** If SQLITE_DEBUG is not defined, then this macro is equivalent to
** SQLITE_CORRUPT_BKPT. Or, if SQLITE_DEBUG is set, then the log message
** normally produced as a side-effect of SQLITE_CORRUPT_BKPT is augmented
** with the page number and filename associated with the (MemPage*).
*/
#ifdef SQLITE_DEBUG
int corruptPageError(int lineno, MemPage *p){


  char *zMsg = sqlite3_mprintf("database corruption page %d of %s",
      (int)p->pgno, sqlite3PagerFilename(p->pBt->pPager, 0)
  );

  if( zMsg ){
    sqlite3ReportError(SQLITE_CORRUPT, lineno, zMsg);
  }
  sqlite3_free(zMsg);
  return SQLITE_CORRUPT_BKPT;
}
# define SQLITE_CORRUPT_PAGE(pMemPage) corruptPageError(__LINE__, pMemPage)

** If SQLITE_DEBUG is not defined, then this macro is equivalent to
** SQLITE_CORRUPT_BKPT. Or, if SQLITE_DEBUG is set, then the log message
** normally produced as a side-effect of SQLITE_CORRUPT_BKPT is augmented
** with the page number and filename associated with the (MemPage*).
*/
#ifdef SQLITE_DEBUG
int corruptPageError(int lineno, MemPage *p){
  char *zMsg;
  sqlite3BeginBenignMalloc();
  zMsg = sqlite3_mprintf("database corruption page %d of %s",
      (int)p->pgno, sqlite3PagerFilename(p->pBt->pPager, 0)
  );
  sqlite3EndBenignMalloc();
  if( zMsg ){
    sqlite3ReportError(SQLITE_CORRUPT, lineno, zMsg);
  }
  sqlite3_free(zMsg);
  return SQLITE_CORRUPT_BKPT;
}
# define SQLITE_CORRUPT_PAGE(pMemPage) corruptPageError(__LINE__, pMemPage)

  if( p ){
    int i;
    for(i=0; i<p->nExpr; i++){
      heightOfExpr(p->a[i].pExpr, pnHeight);
    }
  }
}
static void heightOfSelect(Select *p, int *pnHeight){
  if( p ){

    heightOfExpr(p->pWhere, pnHeight);
    heightOfExpr(p->pHaving, pnHeight);
    heightOfExpr(p->pLimit, pnHeight);
    heightOfExprList(p->pEList, pnHeight);
    heightOfExprList(p->pGroupBy, pnHeight);
    heightOfExprList(p->pOrderBy, pnHeight);
    heightOfSelect(p->pPrior, pnHeight);
  }
}

/*
** Set the Expr.nHeight variable in the structure passed as an 
** argument. An expression with no children, Expr.pList or 
** Expr.pSelect member has a height of 1. Any other expression

  if( p ){
    int i;
    for(i=0; i<p->nExpr; i++){
      heightOfExpr(p->a[i].pExpr, pnHeight);
    }
  }
}
static void heightOfSelect(Select *pSelect, int *pnHeight){
  Select *p;
  for(p=pSelect; p; p=p->pPrior){
    heightOfExpr(p->pWhere, pnHeight);
    heightOfExpr(p->pHaving, pnHeight);
    heightOfExpr(p->pLimit, pnHeight);
    heightOfExprList(p->pEList, pnHeight);
    heightOfExprList(p->pGroupBy, pnHeight);
    heightOfExprList(p->pOrderBy, pnHeight);

  }
}

/*
** Set the Expr.nHeight variable in the structure passed as an 
** argument. An expression with no children, Expr.pList or 
** Expr.pSelect member has a height of 1. Any other expression

  sqlite3_prepare_v3,
  sqlite3_prepare16_v3,
  sqlite3_bind_pointer,
  sqlite3_result_pointer,
  sqlite3_value_pointer,
  /* Version 3.22.0 and later */
  sqlite3_vtab_nochange,
  sqlite3_value_nochange

};

/*
** Attempt to load an SQLite extension library contained in the file
** zFile.  The entry point is zProc.  zProc may be 0 in which case a
** default entry point name (sqlite3_extension_init) is used.  Use
** of the default name is recommended.

  sqlite3_prepare_v3,
  sqlite3_prepare16_v3,
  sqlite3_bind_pointer,
  sqlite3_result_pointer,
  sqlite3_value_pointer,
  /* Version 3.22.0 and later */
  sqlite3_vtab_nochange,
  sqlite3_value_nochange,
  sqlite3_vtab_collation
};

/*
** Attempt to load an SQLite extension library contained in the file
** zFile.  The entry point is zProc.  zProc may be 0 in which case a
** default entry point name (sqlite3_extension_init) is used.  Use
** of the default name is recommended.

** file are currently open, in this process or in other processes, then
** the file must be truncated to zero length or have its header cleared.
*/
static int winOpenSharedMemory(winFile *pDbFd){
  struct winShm *p;                  /* The connection to be opened */
  winShmNode *pShmNode = 0;          /* The underlying mmapped file */
  int rc = SQLITE_OK;                /* Result code */
  int rc2 = SQLITE_ERROR;            /* winOpen result code */
  winShmNode *pNew;                  /* Newly allocated winShmNode */
  int nName;                         /* Size of zName in bytes */

  assert( pDbFd->pShm==0 );    /* Not previously opened */

  /* Allocate space for the new sqlite3_shm object.  Also speculatively
  ** allocate space for a new winShmNode and filename.
................................................................................
    ** use FILE_ID_BOTH_DIR_INFO Structure.
    */
    if( sqlite3StrICmp(pShmNode->zFilename, pNew->zFilename)==0 ) break;
  }
  if( pShmNode ){
    sqlite3_free(pNew);
  }else{



    pShmNode = pNew;
    pNew = 0;
    ((winFile*)(&pShmNode->hFile))->h = INVALID_HANDLE_VALUE;
    pShmNode->pNext = winShmNodeList;
    winShmNodeList = pShmNode;

    if( sqlite3GlobalConfig.bCoreMutex ){
................................................................................
      if( pShmNode->mutex==0 ){
        rc = SQLITE_IOERR_NOMEM_BKPT;
        goto shm_open_err;
      }
    }

    if( 0==sqlite3_uri_boolean(pDbFd->zPath, "readonly_shm", 0) ){
      rc2 = winOpen(pDbFd->pVfs,
                    pShmNode->zFilename,
                    (sqlite3_file*)&pShmNode->hFile,
                    SQLITE_OPEN_WAL|SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE,
                    0);
    }
    if( rc2!=SQLITE_OK ){
      rc2 = winOpen(pDbFd->pVfs,
                    pShmNode->zFilename,
                    (sqlite3_file*)&pShmNode->hFile,
                    SQLITE_OPEN_WAL|SQLITE_OPEN_READONLY,
                    0);

      if( rc2!=SQLITE_OK ){
        rc = winLogError(rc2, osGetLastError(), "winOpenShm",
                         pShmNode->zFilename);
        goto shm_open_err;
      }
      pShmNode->isReadonly = 1;
    }

    rc = winLockSharedMemory(pShmNode);
    if( rc!=SQLITE_OK && rc!=SQLITE_READONLY_CANTINIT ) goto shm_open_err;
  }

  /* Make the new connection a child of the winShmNode */
  p->pShmNode = pShmNode;
................................................................................
      h = osCreateFile2((LPCWSTR)zConverted,
                        dwDesiredAccess,
                        dwShareMode,
                        dwCreationDisposition,
                        &extendedParameters);
      if( h!=INVALID_HANDLE_VALUE ) break;
      if( isReadWrite ){
        int isRO = 0;

        int rc2 = winAccess(pVfs, zName, SQLITE_ACCESS_READ, &isRO);

        if( rc2==SQLITE_OK && isRO ) break;
      }
    }while( winRetryIoerr(&cnt, &lastErrno) );
#else
    do{
      h = osCreateFileW((LPCWSTR)zConverted,
                        dwDesiredAccess,
                        dwShareMode, NULL,
                        dwCreationDisposition,
                        dwFlagsAndAttributes,
                        NULL);
      if( h!=INVALID_HANDLE_VALUE ) break;
      if( isReadWrite ){
        int isRO = 0;

        int rc2 = winAccess(pVfs, zName, SQLITE_ACCESS_READ, &isRO);

        if( rc2==SQLITE_OK && isRO ) break;
      }
    }while( winRetryIoerr(&cnt, &lastErrno) );
#endif
  }
#ifdef SQLITE_WIN32_HAS_ANSI
  else{
................................................................................
                        dwDesiredAccess,
                        dwShareMode, NULL,
                        dwCreationDisposition,
                        dwFlagsAndAttributes,
                        NULL);
      if( h!=INVALID_HANDLE_VALUE ) break;
      if( isReadWrite ){
        int isRO = 0;

        int rc2 = winAccess(pVfs, zName, SQLITE_ACCESS_READ, &isRO);

        if( rc2==SQLITE_OK && isRO ) break;
      }
    }while( winRetryIoerr(&cnt, &lastErrno) );
  }
#endif
  winLogIoerr(cnt, __LINE__);

** file are currently open, in this process or in other processes, then
** the file must be truncated to zero length or have its header cleared.
*/
static int winOpenSharedMemory(winFile *pDbFd){
  struct winShm *p;                  /* The connection to be opened */
  winShmNode *pShmNode = 0;          /* The underlying mmapped file */
  int rc = SQLITE_OK;                /* Result code */

  winShmNode *pNew;                  /* Newly allocated winShmNode */
  int nName;                         /* Size of zName in bytes */

  assert( pDbFd->pShm==0 );    /* Not previously opened */

  /* Allocate space for the new sqlite3_shm object.  Also speculatively
  ** allocate space for a new winShmNode and filename.
................................................................................
    ** use FILE_ID_BOTH_DIR_INFO Structure.
    */
    if( sqlite3StrICmp(pShmNode->zFilename, pNew->zFilename)==0 ) break;
  }
  if( pShmNode ){
    sqlite3_free(pNew);
  }else{
    int inFlags = SQLITE_OPEN_WAL;
    int outFlags = 0;

    pShmNode = pNew;
    pNew = 0;
    ((winFile*)(&pShmNode->hFile))->h = INVALID_HANDLE_VALUE;
    pShmNode->pNext = winShmNodeList;
    winShmNodeList = pShmNode;

    if( sqlite3GlobalConfig.bCoreMutex ){
................................................................................
      if( pShmNode->mutex==0 ){
        rc = SQLITE_IOERR_NOMEM_BKPT;
        goto shm_open_err;
      }
    }

    if( 0==sqlite3_uri_boolean(pDbFd->zPath, "readonly_shm", 0) ){
      inFlags |= SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
    }else{

      inFlags |= SQLITE_OPEN_READONLY;

    }

    rc = winOpen(pDbFd->pVfs, pShmNode->zFilename,

                 (sqlite3_file*)&pShmNode->hFile,


                 inFlags, &outFlags);
    if( rc!=SQLITE_OK ){
      rc = winLogError(rc, osGetLastError(), "winOpenShm",
                       pShmNode->zFilename);
      goto shm_open_err;
    }
    if( outFlags==SQLITE_OPEN_READONLY ) pShmNode->isReadonly = 1;


    rc = winLockSharedMemory(pShmNode);
    if( rc!=SQLITE_OK && rc!=SQLITE_READONLY_CANTINIT ) goto shm_open_err;
  }

  /* Make the new connection a child of the winShmNode */
  p->pShmNode = pShmNode;
................................................................................
      h = osCreateFile2((LPCWSTR)zConverted,
                        dwDesiredAccess,
                        dwShareMode,
                        dwCreationDisposition,
                        &extendedParameters);
      if( h!=INVALID_HANDLE_VALUE ) break;
      if( isReadWrite ){
        int rc2, isRO = 0;
        sqlite3BeginBenignMalloc();
        rc2 = winAccess(pVfs, zName, SQLITE_ACCESS_READ, &isRO);
        sqlite3EndBenignMalloc();
        if( rc2==SQLITE_OK && isRO ) break;
      }
    }while( winRetryIoerr(&cnt, &lastErrno) );
#else
    do{
      h = osCreateFileW((LPCWSTR)zConverted,
                        dwDesiredAccess,
                        dwShareMode, NULL,
                        dwCreationDisposition,
                        dwFlagsAndAttributes,
                        NULL);
      if( h!=INVALID_HANDLE_VALUE ) break;
      if( isReadWrite ){
        int rc2, isRO = 0;
        sqlite3BeginBenignMalloc();
        rc2 = winAccess(pVfs, zName, SQLITE_ACCESS_READ, &isRO);
        sqlite3EndBenignMalloc();
        if( rc2==SQLITE_OK && isRO ) break;
      }
    }while( winRetryIoerr(&cnt, &lastErrno) );
#endif
  }
#ifdef SQLITE_WIN32_HAS_ANSI
  else{
................................................................................
                        dwDesiredAccess,
                        dwShareMode, NULL,
                        dwCreationDisposition,
                        dwFlagsAndAttributes,
                        NULL);
      if( h!=INVALID_HANDLE_VALUE ) break;
      if( isReadWrite ){
        int rc2, isRO = 0;
        sqlite3BeginBenignMalloc();
        rc2 = winAccess(pVfs, zName, SQLITE_ACCESS_READ, &isRO);
        sqlite3EndBenignMalloc();
        if( rc2==SQLITE_OK && isRO ) break;
      }
    }while( winRetryIoerr(&cnt, &lastErrno) );
  }
#endif
  winLogIoerr(cnt, __LINE__);

static void shellModuleSchema(
  sqlite3_context *pCtx,
  int nVal,
  sqlite3_value **apVal
){
  const char *zName = (const char*)sqlite3_value_text(apVal[0]);
  char *zFake = shellFakeSchema(sqlite3_context_db_handle(pCtx), 0, zName);

  if( zFake ){
    sqlite3_result_text(pCtx, sqlite3_mprintf("/* %s */", zFake),
                        -1, sqlite3_free);
    free(zFake);
  }
}

................................................................................
     "VIRTUAL TABLE"
  };
  int i = 0;
  const char *zIn = (const char*)sqlite3_value_text(apVal[0]);
  const char *zSchema = (const char*)sqlite3_value_text(apVal[1]);
  const char *zName = (const char*)sqlite3_value_text(apVal[2]);
  sqlite3 *db = sqlite3_context_db_handle(pCtx);

  if( zIn!=0 && strncmp(zIn, "CREATE ", 7)==0 ){
    for(i=0; i<(int)(sizeof(aPrefix)/sizeof(aPrefix[0])); i++){
      int n = strlen30(aPrefix[i]);
      if( strncmp(zIn+7, aPrefix[i], n)==0 && zIn[n+7]==' ' ){
        char *z = 0;
        char *zFake = 0;
        if( zSchema ){
................................................................................
*/
static void shellPutsFunc(
  sqlite3_context *pCtx,
  int nVal,
  sqlite3_value **apVal
){
  ShellState *p = (ShellState*)sqlite3_user_data(pCtx);

  utf8_printf(p->out, "%s\n", sqlite3_value_text(apVal[0]));
  sqlite3_result_value(pCtx, apVal[0]);
}

/*
** SQL function:   edit(VALUE)
**                 edit(VALUE,EDITOR)
................................................................................
    }
  }else
#endif /* SQLITE_USER_AUTHENTICATION */

  if( c=='v' && strncmp(azArg[0], "version", n)==0 ){
    utf8_printf(p->out, "SQLite %s %s\n" /*extra-version-info*/,
        sqlite3_libversion(), sqlite3_sourceid());














  }else

  if( c=='v' && strncmp(azArg[0], "vfsinfo", n)==0 ){
    const char *zDbName = nArg==2 ? azArg[1] : "main";
    sqlite3_vfs *pVfs = 0;
    if( p->db ){
      sqlite3_file_control(p->db, zDbName, SQLITE_FCNTL_VFS_POINTER, &pVfs);

static void shellModuleSchema(
  sqlite3_context *pCtx,
  int nVal,
  sqlite3_value **apVal
){
  const char *zName = (const char*)sqlite3_value_text(apVal[0]);
  char *zFake = shellFakeSchema(sqlite3_context_db_handle(pCtx), 0, zName);
  UNUSED_PARAMETER(nVal);
  if( zFake ){
    sqlite3_result_text(pCtx, sqlite3_mprintf("/* %s */", zFake),
                        -1, sqlite3_free);
    free(zFake);
  }
}

................................................................................
     "VIRTUAL TABLE"
  };
  int i = 0;
  const char *zIn = (const char*)sqlite3_value_text(apVal[0]);
  const char *zSchema = (const char*)sqlite3_value_text(apVal[1]);
  const char *zName = (const char*)sqlite3_value_text(apVal[2]);
  sqlite3 *db = sqlite3_context_db_handle(pCtx);
  UNUSED_PARAMETER(nVal);
  if( zIn!=0 && strncmp(zIn, "CREATE ", 7)==0 ){
    for(i=0; i<(int)(sizeof(aPrefix)/sizeof(aPrefix[0])); i++){
      int n = strlen30(aPrefix[i]);
      if( strncmp(zIn+7, aPrefix[i], n)==0 && zIn[n+7]==' ' ){
        char *z = 0;
        char *zFake = 0;
        if( zSchema ){
................................................................................
*/
static void shellPutsFunc(
  sqlite3_context *pCtx,
  int nVal,
  sqlite3_value **apVal
){
  ShellState *p = (ShellState*)sqlite3_user_data(pCtx);
  (void)nVal;
  utf8_printf(p->out, "%s\n", sqlite3_value_text(apVal[0]));
  sqlite3_result_value(pCtx, apVal[0]);
}

/*
** SQL function:   edit(VALUE)
**                 edit(VALUE,EDITOR)
................................................................................
    }
  }else
#endif /* SQLITE_USER_AUTHENTICATION */

  if( c=='v' && strncmp(azArg[0], "version", n)==0 ){
    utf8_printf(p->out, "SQLite %s %s\n" /*extra-version-info*/,
        sqlite3_libversion(), sqlite3_sourceid());
#if SQLITE_HAVE_ZLIB
    utf8_printf(p->out, "zlib version %s\n", zlibVersion());
#endif
#define CTIMEOPT_VAL_(opt) #opt
#define CTIMEOPT_VAL(opt) CTIMEOPT_VAL_(opt)
#if defined(__clang__) && defined(__clang_major__)
    utf8_printf(p->out, "clang-" CTIMEOPT_VAL(__clang_major__) "."
                    CTIMEOPT_VAL(__clang_minor__) "."
                    CTIMEOPT_VAL(__clang_patchlevel__) "\n");
#elif defined(_MSC_VER)
    utf8_printf(p->out, "msvc-" CTIMEOPT_VAL(_MSC_VER) "\n");
#elif defined(__GNUC__) && defined(__VERSION__)
    utf8_printf(p->out, "gcc-" __VERSION__ "\n");
#endif
  }else

  if( c=='v' && strncmp(azArg[0], "vfsinfo", n)==0 ){
    const char *zDbName = nArg==2 ? azArg[1] : "main";
    sqlite3_vfs *pVfs = 0;
    if( p->db ){
      sqlite3_file_control(p->db, zDbName, SQLITE_FCNTL_VFS_POINTER, &pVfs);

#define SQLITE_LOCKED_SHAREDCACHE      (SQLITE_LOCKED |  (1<<8))
#define SQLITE_BUSY_RECOVERY           (SQLITE_BUSY   |  (1<<8))
#define SQLITE_BUSY_SNAPSHOT           (SQLITE_BUSY   |  (2<<8))
#define SQLITE_CANTOPEN_NOTEMPDIR      (SQLITE_CANTOPEN | (1<<8))
#define SQLITE_CANTOPEN_ISDIR          (SQLITE_CANTOPEN | (2<<8))
#define SQLITE_CANTOPEN_FULLPATH       (SQLITE_CANTOPEN | (3<<8))
#define SQLITE_CANTOPEN_CONVPATH       (SQLITE_CANTOPEN | (4<<8))
#define SQLITE_CANTOPEN_DIRTYWAL       (SQLITE_CANTOPEN | (5<<8))
#define SQLITE_CORRUPT_VTAB            (SQLITE_CORRUPT | (1<<8))
#define SQLITE_READONLY_RECOVERY       (SQLITE_READONLY | (1<<8))
#define SQLITE_READONLY_CANTLOCK       (SQLITE_READONLY | (2<<8))
#define SQLITE_READONLY_ROLLBACK       (SQLITE_READONLY | (3<<8))
#define SQLITE_READONLY_DBMOVED        (SQLITE_READONLY | (4<<8))
#define SQLITE_READONLY_CANTINIT       (SQLITE_READONLY | (5<<8))
#define SQLITE_READONLY_DIRECTORY      (SQLITE_READONLY | (6<<8))
................................................................................
   void(*xProfile)(void*,const char*,sqlite3_uint64), void*);

/*
** CAPI3REF: SQL Trace Event Codes
** KEYWORDS: SQLITE_TRACE
**
** These constants identify classes of events that can be monitored
** using the [sqlite3_trace_v2()] tracing logic.  The third argument
** to [sqlite3_trace_v2()] is an OR-ed combination of one or more of
** the following constants.  ^The first argument to the trace callback
** is one of the following constants.
**
** New tracing constants may be added in future releases.
**
** ^A trace callback has four arguments: xCallback(T,C,P,X).
** ^The T argument is one of the integer type codes above.

#define SQLITE_LOCKED_SHAREDCACHE      (SQLITE_LOCKED |  (1<<8))
#define SQLITE_BUSY_RECOVERY           (SQLITE_BUSY   |  (1<<8))
#define SQLITE_BUSY_SNAPSHOT           (SQLITE_BUSY   |  (2<<8))
#define SQLITE_CANTOPEN_NOTEMPDIR      (SQLITE_CANTOPEN | (1<<8))
#define SQLITE_CANTOPEN_ISDIR          (SQLITE_CANTOPEN | (2<<8))
#define SQLITE_CANTOPEN_FULLPATH       (SQLITE_CANTOPEN | (3<<8))
#define SQLITE_CANTOPEN_CONVPATH       (SQLITE_CANTOPEN | (4<<8))

#define SQLITE_CORRUPT_VTAB            (SQLITE_CORRUPT | (1<<8))
#define SQLITE_READONLY_RECOVERY       (SQLITE_READONLY | (1<<8))
#define SQLITE_READONLY_CANTLOCK       (SQLITE_READONLY | (2<<8))
#define SQLITE_READONLY_ROLLBACK       (SQLITE_READONLY | (3<<8))
#define SQLITE_READONLY_DBMOVED        (SQLITE_READONLY | (4<<8))
#define SQLITE_READONLY_CANTINIT       (SQLITE_READONLY | (5<<8))
#define SQLITE_READONLY_DIRECTORY      (SQLITE_READONLY | (6<<8))
................................................................................
   void(*xProfile)(void*,const char*,sqlite3_uint64), void*);

/*
** CAPI3REF: SQL Trace Event Codes
** KEYWORDS: SQLITE_TRACE
**
** These constants identify classes of events that can be monitored
** using the [sqlite3_trace_v2()] tracing logic.  The M argument
** to [sqlite3_trace_v2(D,M,X,P)] is an OR-ed combination of one or more of
** the following constants.  ^The first argument to the trace callback
** is one of the following constants.
**
** New tracing constants may be added in future releases.
**
** ^A trace callback has four arguments: xCallback(T,C,P,X).
** ^The T argument is one of the integer type codes above.

  int (*prepare16_v3)(sqlite3*,const void*,int,unsigned int,
                      sqlite3_stmt**,const void**);
  int (*bind_pointer)(sqlite3_stmt*,int,void*,const char*,void(*)(void*));
  void (*result_pointer)(sqlite3_context*,void*,const char*,void(*)(void*));
  void *(*value_pointer)(sqlite3_value*,const char*);
  int (*vtab_nochange)(sqlite3_context*);
  int (*value_nochange)(sqlite3_value*);

};

/*
** This is the function signature used for all extension entry points.  It
** is also defined in the file "loadext.c".
*/
typedef int (*sqlite3_loadext_entry)(
................................................................................
#define sqlite3_prepare16_v3           sqlite3_api->prepare16_v3
#define sqlite3_bind_pointer           sqlite3_api->bind_pointer
#define sqlite3_result_pointer         sqlite3_api->result_pointer
#define sqlite3_value_pointer          sqlite3_api->value_pointer
/* Version 3.22.0 and later */
#define sqlite3_vtab_nochange          sqlite3_api->vtab_nochange
#define sqlite3_value_nochange         sqltie3_api->value_nochange

#endif /* !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION) */

#if !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION)
  /* This case when the file really is being compiled as a loadable 
  ** extension */
# define SQLITE_EXTENSION_INIT1     const sqlite3_api_routines *sqlite3_api=0;
# define SQLITE_EXTENSION_INIT2(v)  sqlite3_api=v;

  int (*prepare16_v3)(sqlite3*,const void*,int,unsigned int,
                      sqlite3_stmt**,const void**);
  int (*bind_pointer)(sqlite3_stmt*,int,void*,const char*,void(*)(void*));
  void (*result_pointer)(sqlite3_context*,void*,const char*,void(*)(void*));
  void *(*value_pointer)(sqlite3_value*,const char*);
  int (*vtab_nochange)(sqlite3_context*);
  int (*value_nochange)(sqlite3_value*);
  const char *(*vtab_collation)(sqlite3_index_info*,int);
};

/*
** This is the function signature used for all extension entry points.  It
** is also defined in the file "loadext.c".
*/
typedef int (*sqlite3_loadext_entry)(
................................................................................
#define sqlite3_prepare16_v3           sqlite3_api->prepare16_v3
#define sqlite3_bind_pointer           sqlite3_api->bind_pointer
#define sqlite3_result_pointer         sqlite3_api->result_pointer
#define sqlite3_value_pointer          sqlite3_api->value_pointer
/* Version 3.22.0 and later */
#define sqlite3_vtab_nochange          sqlite3_api->vtab_nochange
#define sqlite3_value_nochange         sqltie3_api->value_nochange
#define sqlite3_vtab_collation         sqltie3_api->vtab_collation
#endif /* !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION) */

#if !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION)
  /* This case when the file really is being compiled as a loadable 
  ** extension */
# define SQLITE_EXTENSION_INIT1     const sqlite3_api_routines *sqlite3_api=0;
# define SQLITE_EXTENSION_INIT2(v)  sqlite3_api=v;

/*
** Compute 10 to the E-th power.  Examples:  E==1 results in 10.
** E==2 results in 100.  E==50 results in 1.0e50.
**
** This routine only works for values of E between 1 and 341.
*/
static LONGDOUBLE_TYPE sqlite3Pow10(int E){




















  LONGDOUBLE_TYPE x = 10.0;
  LONGDOUBLE_TYPE r = 1.0;
  while(1){
    if( E & 1 ) r *= x;
    E >>= 1;
    if( E==0 ) break;
    x *= x;
  }
  return r; 

}

/*
** The string z[] is an text representation of a real number.
** Convert this string to a double and write it into *pResult.
**
** The string z[] is length bytes in length (bytes, not characters) and

/*
** Compute 10 to the E-th power.  Examples:  E==1 results in 10.
** E==2 results in 100.  E==50 results in 1.0e50.
**
** This routine only works for values of E between 1 and 341.
*/
static LONGDOUBLE_TYPE sqlite3Pow10(int E){
#if defined(_MSC_VER)
  static const LONGDOUBLE_TYPE x[] = {
    1.0e+001,
    1.0e+002,
    1.0e+004,
    1.0e+008,
    1.0e+016,
    1.0e+032,
    1.0e+064,
    1.0e+128,
    1.0e+256
  };
  LONGDOUBLE_TYPE r = 1.0;
  int i;
  assert( E>=0 && E<=307 );
  for(i=0; E!=0; i++, E >>=1){
    if( E & 1 ) r *= x[i];
  }
  return r;
#else
  LONGDOUBLE_TYPE x = 10.0;
  LONGDOUBLE_TYPE r = 1.0;
  while(1){
    if( E & 1 ) r *= x;
    E >>= 1;
    if( E==0 ) break;
    x *= x;
  }
  return r; 
#endif
}

/*
** The string z[] is an text representation of a real number.
** Convert this string to a double and write it into *pResult.
**
** The string z[] is length bytes in length (bytes, not characters) and

  FuncDef *pFunc;         /* Pointer to function information */
  Mem *pMem;              /* Memory cell used to store aggregate context */
  Vdbe *pVdbe;            /* The VM that owns this context */
  int iOp;                /* Instruction number of OP_Function */
  int isError;            /* Error code returned by the function. */
  u8 skipFlag;            /* Skip accumulator loading if true */
  u8 fErrorOrAux;         /* isError!=0 or pVdbe->pAuxData modified */
  u8 bVtabNoChng;         /* Fetching an unchanging column in a vtab UPDATE */
  u8 argc;                /* Number of arguments */
  sqlite3_value *argv[1]; /* Argument set */
};

/* A bitfield type for use inside of structures.  Always follow with :N where
** N is the number of bits.
*/

  FuncDef *pFunc;         /* Pointer to function information */
  Mem *pMem;              /* Memory cell used to store aggregate context */
  Vdbe *pVdbe;            /* The VM that owns this context */
  int iOp;                /* Instruction number of OP_Function */
  int isError;            /* Error code returned by the function. */
  u8 skipFlag;            /* Skip accumulator loading if true */
  u8 fErrorOrAux;         /* isError!=0 or pVdbe->pAuxData modified */

  u8 argc;                /* Number of arguments */
  sqlite3_value *argv[1]; /* Argument set */
};

/* A bitfield type for use inside of structures.  Always follow with :N where
** N is the number of bits.
*/

    }
  }
  WHERETRACE(0xffff,("*** Optimizer Finished ***\n"));
  pWInfo->pParse->nQueryLoop += pWInfo->nRowOut;

  /* If the caller is an UPDATE or DELETE statement that is requesting
  ** to use a one-pass algorithm, determine if this is appropriate.
















  */
  assert( (wctrlFlags & WHERE_ONEPASS_DESIRED)==0 || pWInfo->nLevel==1 );
  if( (wctrlFlags & WHERE_ONEPASS_DESIRED)!=0 ){
    int wsFlags = pWInfo->a[0].pWLoop->wsFlags;
    int bOnerow = (wsFlags & WHERE_ONEROW)!=0;
    if( bOnerow
     || ((wctrlFlags & WHERE_ONEPASS_MULTIROW)!=0
           && 0==(wsFlags & WHERE_VIRTUALTABLE))

    ){
      pWInfo->eOnePass = bOnerow ? ONEPASS_SINGLE : ONEPASS_MULTI;
      if( HasRowid(pTabList->a[0].pTab) && (wsFlags & WHERE_IDX_ONLY) ){
        if( wctrlFlags & WHERE_ONEPASS_MULTIROW ){
          bFordelete = OPFLAG_FORDELETE;
        }
        pWInfo->a[0].pWLoop->wsFlags = (wsFlags & ~WHERE_IDX_ONLY);
      }

    }
  }
  WHERETRACE(0xffff,("*** Optimizer Finished ***\n"));
  pWInfo->pParse->nQueryLoop += pWInfo->nRowOut;

  /* If the caller is an UPDATE or DELETE statement that is requesting
  ** to use a one-pass algorithm, determine if this is appropriate.
  **
  ** A one-pass approach can be used if the caller has requested one
  ** and either (a) the scan visits at most one row or (b) each
  ** of the following are true:
  **
  **   * the caller has indicated that a one-pass approach can be used
  **     with multiple rows (by setting WHERE_ONEPASS_MULTIROW), and
  **   * the table is not a virtual table, and
  **   * either the scan does not use the OR optimization or the caller
  **     is a DELETE operation (WHERE_DUPLICATES_OK is only specified
  **     for DELETE).
  **
  ** The last qualification is because an UPDATE statement uses
  ** WhereInfo.aiCurOnePass[1] to determine whether or not it really can
  ** use a one-pass approach, and this is not set accurately for scans
  ** that use the OR optimization.
  */
  assert( (wctrlFlags & WHERE_ONEPASS_DESIRED)==0 || pWInfo->nLevel==1 );
  if( (wctrlFlags & WHERE_ONEPASS_DESIRED)!=0 ){
    int wsFlags = pWInfo->a[0].pWLoop->wsFlags;
    int bOnerow = (wsFlags & WHERE_ONEROW)!=0;
    if( bOnerow || (
        0!=(wctrlFlags & WHERE_ONEPASS_MULTIROW)
     && 0==(wsFlags & WHERE_VIRTUALTABLE)
     && (0==(wsFlags & WHERE_MULTI_OR) || (wctrlFlags & WHERE_DUPLICATES_OK))
    )){
      pWInfo->eOnePass = bOnerow ? ONEPASS_SINGLE : ONEPASS_MULTI;
      if( HasRowid(pTabList->a[0].pTab) && (wsFlags & WHERE_IDX_ONLY) ){
        if( wctrlFlags & WHERE_ONEPASS_MULTIROW ){
          bFordelete = OPFLAG_FORDELETE;
        }
        pWInfo->a[0].pWLoop->wsFlags = (wsFlags & ~WHERE_IDX_ONLY);
      }

source $testdir/tester.tcl
set testprefix shell8

ifcapable !vtab {
  finish_test; return
}
set CLI [test_find_cli]







proc populate_dir {dirname spec} {
  # First delete the current tree, if one exists.
  file delete -force $dirname
  
  # Recreate the root of the new tree.
  file mkdir $dirname

source $testdir/tester.tcl
set testprefix shell8

ifcapable !vtab {
  finish_test; return
}
set CLI [test_find_cli]

# Check to make sure the shell has been compiled with ".archive" support.
#
if {[string match {*unknown command*} [catchcmd :memory: .archive]]} {
  finish_test; return
}

proc populate_dir {dirname spec} {
  # First delete the current tree, if one exists.
  file delete -force $dirname
  
  # Recreate the root of the new tree.
  file mkdir $dirname

do_test 5.2 {
  catch { array unset A }
  db eval { EXPLAIN UPDATE x1 SET c=c+1 WHERE b='a' } { incr A($opcode) }
  set A(NotExists)
} {1}

















finish_test

do_test 5.2 {
  catch { array unset A }
  db eval { EXPLAIN UPDATE x1 SET c=c+1 WHERE b='a' } { incr A($opcode) }
  set A(NotExists)
} {1}

#-------------------------------------------------------------------------
do_execsql_test 6.0 {
  CREATE TABLE d1(a,b);
  CREATE INDEX d1b ON d1(a);
  CREATE INDEX d1c ON d1(b);
  INSERT INTO d1 VALUES(1,2);
}

do_execsql_test 6.1 {
  UPDATE d1 SET a = a+2 WHERE a>0 OR b>0;
}

do_execsql_test 6.2 {
  SELECT * FROM d1;
} {3 2}

finish_test

  set nRow [db eval {SELECT count(*) FROM abc}]
  if {!(($nRow==2 && $testrc) || $nRow==3)} { error "Bad db content" }
}

#-------------------------------------------------------------------------
# Test fault-handling when switching out of exclusive-locking mode.
#
do_test walfault-14-pre {
  faultsim_delete_and_reopen
  execsql {
    PRAGMA auto_vacuum = 0;
    PRAGMA journal_mode = WAL;
    BEGIN;
      CREATE TABLE abc(a PRIMARY KEY);
      INSERT INTO abc VALUES(randomblob(1500));
      INSERT INTO abc VALUES(randomblob(1500));
    COMMIT;
  }
  faultsim_save_and_close
} {}
do_faultsim_test walfault-14 -prep {
  faultsim_restore_and_reopen
  execsql {
    SELECT count(*) FROM abc;
    PRAGMA locking_mode = exclusive;
    BEGIN;
      INSERT INTO abc VALUES(randomblob(1500));
    COMMIT;

  set nRow [db eval {SELECT count(*) FROM abc}]
  if {!(($nRow==2 && $testrc) || $nRow==3)} { error "Bad db content" }
}

#-------------------------------------------------------------------------
# Test fault-handling when switching out of exclusive-locking mode.
#
do_test walfault-15-pre {
  faultsim_delete_and_reopen
  execsql {
    PRAGMA auto_vacuum = 0;
    PRAGMA journal_mode = WAL;
    BEGIN;
      CREATE TABLE abc(a PRIMARY KEY);
      INSERT INTO abc VALUES(randomblob(1500));
      INSERT INTO abc VALUES(randomblob(1500));
    COMMIT;
  }
  faultsim_save_and_close
} {}
do_faultsim_test walfault-15 -prep {
  faultsim_restore_and_reopen
  execsql {
    SELECT count(*) FROM abc;
    PRAGMA locking_mode = exclusive;
    BEGIN;
      INSERT INTO abc VALUES(randomblob(1500));
    COMMIT;

        WITH s(i) AS (
          SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<500
          )
        INSERT INTO t2 SELECT randomblob(500) FROM s;
        SELECT count(*) FROM t2;
    } 
  } {500}
  do_test $TN.4.2.2 {
    set sz [file size test.db-wal]
    expr {$sz>400000 && $sz<500000}
  } {1}
  do_test $TN.4.2.4 {
    file_control_persist_wal db 1; db close

    copy_to_test2 $bZeroShm
    code2 { sqlite3 db2 file:test.db2?readonly_shm=1 }
    sql2 {

        WITH s(i) AS (
          SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<500
          )
        INSERT INTO t2 SELECT randomblob(500) FROM s;
        SELECT count(*) FROM t2;
    } 
  } {500}
  set sz [file size test.db-wal]
  do_test $TN.4.2.2.(sz=$sz) {
    expr {$sz>400000}
  } {1}
  do_test $TN.4.2.4 {
    file_control_persist_wal db 1; db close

    copy_to_test2 $bZeroShm
    code2 { sqlite3 db2 file:test.db2?readonly_shm=1 }
    sql2 {

do_execsql_test 1.4 {
  SELECT name, mtime, data, method FROM zipfile('test.zip');
} {
  f.txt 1000000000 abcde 0
  g.txt 1000000002 12345 0
  h.txt 1000000004 aaaaaaaaaabbbbbbbbbb 8
}












do_execsql_test 1.5.1 {
  BEGIN;
    INSERT INTO zz(name, mode, mtime, data, method)
    VALUES('i.txt', '-rw-r--r--', 1000000006, 'zxcvb', 0);
    SELECT name FROM zz;
  COMMIT;

do_execsql_test 1.4 {
  SELECT name, mtime, data, method FROM zipfile('test.zip');
} {
  f.txt 1000000000 abcde 0
  g.txt 1000000002 12345 0
  h.txt 1000000004 aaaaaaaaaabbbbbbbbbb 8
}

ifcapable json1 {
  do_execsql_test 1.4.1 {
    SELECT name, json_extract( zipfile_cds(z) , '$.crc32')!=0
    FROM zipfile('test.zip');
  } {
    f.txt 1
    g.txt 1
    h.txt 1
  }
}

do_execsql_test 1.5.1 {
  BEGIN;
    INSERT INTO zz(name, mode, mtime, data, method)
    VALUES('i.txt', '-rw-r--r--', 1000000006, 'zxcvb', 0);
    SELECT name FROM zz;
  COMMIT;

  ParseTOKENTYPE yyLookaheadToken  /* Value of the lookahead token */
){
  int yygoto;                     /* The next state */
  int yyact;                      /* The next action */
  yyStackEntry *yymsp;            /* The top of the parser's stack */
  int yysize;                     /* Amount to pop the stack */
  ParseARG_FETCH;


  yymsp = yypParser->yytos;
#ifndef NDEBUG
  if( yyTraceFILE && yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){
    yysize = yyRuleInfo[yyruleno].nrhs;
    if( yysize ){
      fprintf(yyTraceFILE, "%sReduce %d [%s], go to state %d.\n",
        yyTracePrompt,

  ParseTOKENTYPE yyLookaheadToken  /* Value of the lookahead token */
){
  int yygoto;                     /* The next state */
  int yyact;                      /* The next action */
  yyStackEntry *yymsp;            /* The top of the parser's stack */
  int yysize;                     /* Amount to pop the stack */
  ParseARG_FETCH;
  (void)yyLookahead;
  (void)yyLookaheadToken;
  yymsp = yypParser->yytos;
#ifndef NDEBUG
  if( yyTraceFILE && yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){
    yysize = yyRuleInfo[yyruleno].nrhs;
    if( yysize ){
      fprintf(yyTraceFILE, "%sReduce %d [%s], go to state %d.\n",
        yyTracePrompt,