Fossil

  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<ArraySize(aPrefix); 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 ){
          char cQuote = quoteChar(zSchema);
          if( cQuote && sqlite3_stricmp(zSchema,"temp")!=0 ){

  char rowSepPrior[20];  /* Saved row separator */
  int *colWidth;         /* Requested width of each column in columnar modes */
  int *actualWidth;      /* Actual width of each column */
  int nWidth;            /* Number of slots in colWidth[] and actualWidth[] */
  char nullValue[20];    /* The text to print when a NULL comes back from
                         ** the database */
  char outfile[FILENAME_MAX]; /* Filename for *out */



  sqlite3_stmt *pStmt;   /* Current statement if any. */
  FILE *pLog;            /* Write log output here */
  struct AuxDb {         /* Storage space for auxiliary database connections */
    sqlite3 *db;               /* Connection pointer */
    const char *zDbFilename;   /* Filename used to open the connection */
    char *zFreeOnClose;        /* Free this memory allocation on close */
#if defined(SQLITE_ENABLE_SESSION)
    int nSession;              /* Number of active sessions */
    OpenSession aSession[4];   /* Array of sessions.  [0] is in focus. */
#endif
  } aAuxDb[5],           /* Array of all database connections */
    *pAuxDb;             /* Currently active database connection */
  int *aiIndent;         /* Array of indents used in MODE_Explain */
  int nIndent;           /* Size of array aiIndent[] */
  int iIndent;           /* Index of current op in aiIndent[] */
  EQPGraph sGraph;       /* Information for the graphical EXPLAIN QUERY PLAN */




  ExpertInfo expert;        /* Valid if previous command was ".expert OPT..." */
};


/* Allowed values for ShellState.autoEQP
*/
#define AUTOEQP_off      0           /* Automatic EXPLAIN QUERY PLAN is off */

  "       --async             Write to FILE without journal and fsync()",
  ".bail on|off             Stop after hitting an error.  Default OFF",
  ".binary on|off           Turn binary output on or off.  Default OFF",
  ".cd DIRECTORY            Change the working directory to DIRECTORY",
  ".changes on|off          Show number of rows changed by SQL",
  ".check GLOB              Fail if output since .testcase does not match",
  ".clone NEWDB             Clone data into NEWDB from the existing database",
  ".connection [close] [#]  Open or close an auxiliary database connection",
  ".databases               List names and files of attached databases",
  ".dbconfig ?op? ?val?     List or change sqlite3_db_config() options",
  ".dbinfo ?DB?             Show status information about the database",
  ".dump ?OBJECTS?          Render database content as SQL",
  "   Options:",
  "     --data-only            Output only INSERT statements",
  "     --newlines             Allow unescaped newline characters in output",

}
#endif

/*
** Close all OpenSession objects and release all associated resources.
*/
#if defined(SQLITE_ENABLE_SESSION)
static void session_close_all(ShellState *p, int i){
  int j;
  struct AuxDb *pAuxDb = i<0 ? p->pAuxDb : &p->aAuxDb[i];
  for(j=0; j<pAuxDb->nSession; j++){
    session_close(&pAuxDb->aSession[j]);
  }
  pAuxDb->nSession = 0;
}
#else
# define session_close_all(X,Y)
#endif

/*
** Implementation of the xFilter function for an open session.  Omit
** any tables named by ".session filter" but let all other table through.
*/
#if defined(SQLITE_ENABLE_SESSION)

  fclose(f);
  return rc;  
}

#ifndef SQLITE_OMIT_DESERIALIZE
/*
** Reconstruct an in-memory database using the output from the "dbtotxt"
** program.  Read content from the file in p->aAuxDb[].zDbFilename.
** If p->aAuxDb[].zDbFilename is 0, then read from standard input.
*/
static unsigned char *readHexDb(ShellState *p, int *pnData){
  unsigned char *a = 0;
  int nLine;
  int n = 0;
  int pgsz = 0;
  int iOffset = 0;
  int j, k;
  int rc;
  FILE *in;
  const char *zDbFilename = p->pAuxDb->zDbFilename;
  unsigned int x[16];
  char zLine[1000];
  if( zDbFilename ){
    in = fopen(zDbFilename, "r");
    if( in==0 ){
      utf8_printf(stderr, "cannot open \"%s\" for reading\n", zDbFilename);
      return 0;
    }
    nLine = 0;
  }else{
    in = p->in;
    nLine = p->lineno;
    if( in==0 ) in = stdin;

/*
** Make sure the database is open.  If it is not, then open it.  If
** the database fails to open, print an error message and exit.
*/
static void open_db(ShellState *p, int openFlags){
  if( p->db==0 ){
    const char *zDbFilename = p->pAuxDb->zDbFilename;
    if( p->openMode==SHELL_OPEN_UNSPEC ){
      if( zDbFilename==0 || zDbFilename[0]==0 ){
        p->openMode = SHELL_OPEN_NORMAL;
      }else{
        p->openMode = (u8)deduceDatabaseType(zDbFilename, 
                             (openFlags & OPEN_DB_ZIPFILE)!=0);
      }
    }
    switch( p->openMode ){
      case SHELL_OPEN_APPENDVFS: {
        sqlite3_open_v2(zDbFilename, &p->db, 
           SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|p->openFlags, "apndvfs");
        break;
      }
      case SHELL_OPEN_HEXDB:
      case SHELL_OPEN_DESERIALIZE: {
        sqlite3_open(0, &p->db);
        break;
      }
      case SHELL_OPEN_ZIPFILE: {
        sqlite3_open(":memory:", &p->db);
        break;
      }
      case SHELL_OPEN_READONLY: {
        sqlite3_open_v2(zDbFilename, &p->db,
            SQLITE_OPEN_READONLY|p->openFlags, 0);
        break;
      }
      case SHELL_OPEN_UNSPEC:
      case SHELL_OPEN_NORMAL: {
        sqlite3_open_v2(zDbFilename, &p->db,
           SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|p->openFlags, 0);
        break;
      }
    }
    globalDb = p->db;
    if( p->db==0 || SQLITE_OK!=sqlite3_errcode(p->db) ){
      utf8_printf(stderr,"Error: unable to open database \"%s\": %s\n",
          zDbFilename, sqlite3_errmsg(p->db));
      if( openFlags & OPEN_DB_KEEPALIVE ){
        sqlite3_open(":memory:", &p->db);
        return;
      }
      exit(1);
    }
#ifndef SQLITE_OMIT_LOAD_EXTENSION

    sqlite3_create_function(p->db, "edit", 1, SQLITE_UTF8, 0,
                            editFunc, 0, 0);
    sqlite3_create_function(p->db, "edit", 2, SQLITE_UTF8, 0,
                            editFunc, 0, 0);
#endif
    if( p->openMode==SHELL_OPEN_ZIPFILE ){
      char *zSql = sqlite3_mprintf(
         "CREATE VIRTUAL TABLE zip USING zipfile(%Q);", zDbFilename);
      sqlite3_exec(p->db, zSql, 0, 0, 0);
      sqlite3_free(zSql);
    }
#ifndef SQLITE_OMIT_DESERIALIZE
    else
    if( p->openMode==SHELL_OPEN_DESERIALIZE || p->openMode==SHELL_OPEN_HEXDB ){
      int rc;
      int nData = 0;
      unsigned char *aData;
      if( p->openMode==SHELL_OPEN_DESERIALIZE ){
        aData = (unsigned char*)readFile(zDbFilename, &nData);
      }else{
        aData = readHexDb(p, &nData);
        if( aData==0 ){
          return;
        }
      }
      rc = sqlite3_deserialize(p->db, "main", aData, nData, nData,

    raw_printf(pState->out, "COMMIT;\n");
  }
  sqlite3_exec(pState->db, "DETACH recovery", 0, 0, 0);
  return rc;
}
#endif /* !(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_ENABLE_DBPAGE_VTAB) */


/*
** If an input line begins with "." then invoke this routine to
** process that line.
**
** Return 1 on error, 2 to exit, and 0 otherwise.
*/
static int do_meta_command(char *zLine, ShellState *p){

        setTextMode(p->out, 1);
      }
    }else{
      raw_printf(stderr, "Usage: .binary on|off\n");
      rc = 1;
    }
  }else

  /* The undocumented ".breakpoint" command causes a call to the no-op
  ** routine named test_breakpoint().
  */
  if( c=='b' && n>=3 && strncmp(azArg[0], "breakpoint", n)==0 ){
    test_breakpoint();
  }else

  if( c=='c' && strcmp(azArg[0],"cd")==0 ){
    if( nArg==2 ){
#if defined(_WIN32) || defined(WIN32)
      wchar_t *z = sqlite3_win32_utf8_to_unicode(azArg[1]);
      rc = !SetCurrentDirectoryW(z);
      sqlite3_free(z);
#else
      rc = chdir(azArg[1]);
#endif
      if( rc ){
        utf8_printf(stderr, "Cannot change to directory \"%s\"\n", azArg[1]);
        rc = 1;
      }
    }else{
      raw_printf(stderr, "Usage: .cd DIRECTORY\n");
      rc = 1;
    }
  }else








  if( c=='c' && n>=3 && strncmp(azArg[0], "changes", n)==0 ){
    if( nArg==2 ){
      setOrClearFlag(p, SHFLG_CountChanges, azArg[1]);
    }else{
      raw_printf(stderr, "Usage: .changes on|off\n");
      rc = 1;
    }

    if( nArg==2 ){
      tryToClone(p, azArg[1]);
    }else{
      raw_printf(stderr, "Usage: .clone FILENAME\n");
      rc = 1;
    }
  }else

  if( c=='c' && strncmp(azArg[0], "connection", n)==0 ){
    if( nArg==1 ){
      /* List available connections */
      int i;
      for(i=0; i<ArraySize(p->aAuxDb); i++){
        const char *zFile = p->aAuxDb[i].zDbFilename;
        if( p->aAuxDb[i].db==0 && p->pAuxDb!=&p->aAuxDb[i] ){
          zFile = "(not open)";
        }else if( zFile==0 ){
          zFile = "(memory)";
        }else if( zFile[0]==0 ){
          zFile = "(temporary-file)";
        }
        if( p->pAuxDb == &p->aAuxDb[i] ){
          utf8_printf(stdout, "ACTIVE %d: %s\n", i, zFile);
        }else if( p->aAuxDb[i].db!=0 ){
          utf8_printf(stdout, "       %d: %s\n", i, zFile);
        }
      }
    }else if( nArg==2 && IsDigit(azArg[1][0]) && azArg[1][1]==0 ){
      int i = azArg[1][0] - '0';
      if( p->pAuxDb != &p->aAuxDb[i] && i>=0 && i<ArraySize(p->aAuxDb) ){
        p->pAuxDb->db = p->db;
        p->pAuxDb = &p->aAuxDb[i];
        globalDb = p->db = p->pAuxDb->db;
        p->pAuxDb->db = 0;
      }
    }else if( nArg==3 && strcmp(azArg[1], "close")==0
           && IsDigit(azArg[2][0]) && azArg[2][1]==0 ){
      int i = azArg[2][0] - '0';
      if( i<0 || i>=ArraySize(p->aAuxDb) ){
        /* No-op */
      }else if( p->pAuxDb == &p->aAuxDb[i] ){
        raw_printf(stderr, "cannot close the active database connection\n");
        rc = 1;
      }else if( p->aAuxDb[i].db ){
        session_close_all(p, i);
        close_db(p->aAuxDb[i].db);
        p->aAuxDb[i].db = 0;
      }
    }else{
      raw_printf(stderr, "Usage: .connection [close] [CONNECTION-NUMBER]\n");
      rc = 1;
    }
  }else

  if( c=='d' && n>1 && strncmp(azArg[0], "databases", n)==0 ){
    char **azName = 0;
    int nName = 0;
    sqlite3_stmt *pStmt;
    int i;
    open_db(p, 0);

#endif /* SQLITE_DEBUG */

  if( c=='o' && strncmp(azArg[0], "open", n)==0 && n>=2 ){
    char *zNewFilename = 0;  /* Name of the database file to open */
    int iName = 1;           /* Index in azArg[] of the filename */
    int newFlag = 0;         /* True to delete file before opening */
    /* Close the existing database */
    session_close_all(p, -1);
    close_db(p->db);
    p->db = 0;
    p->pAuxDb->zDbFilename = 0;
    sqlite3_free(p->pAuxDb->zFreeOnClose);
    p->pAuxDb->zFreeOnClose = 0;
    p->openMode = SHELL_OPEN_UNSPEC;
    p->openFlags = 0;
    p->szMax = 0;
    /* Check for command-line arguments */
    for(iName=1; iName<nArg; iName++){
      const char *z = azArg[iName];
      if( optionMatch(z,"new") ){

      }else{
        zNewFilename = sqlite3_mprintf("%s", z);
      }
    }
    /* If a filename is specified, try to open it first */
    if( zNewFilename || p->openMode==SHELL_OPEN_HEXDB ){
      if( newFlag ) shellDeleteFile(zNewFilename);
      p->pAuxDb->zDbFilename = zNewFilename;
      open_db(p, OPEN_DB_KEEPALIVE);
      if( p->db==0 ){
        utf8_printf(stderr, "Error: cannot open '%s'\n", zNewFilename);
        sqlite3_free(zNewFilename);
      }else{
        p->pAuxDb->zFreeOnClose = zNewFilename;
      }
    }
    if( p->db==0 ){
      /* As a fall-back open a TEMP database */
      p->pAuxDb->zDbFilename = 0;
      open_db(p, 0);
    }
  }else

  if( (c=='o'
        && (strncmp(azArg[0], "output", n)==0||strncmp(azArg[0], "once", n)==0))
   || (c=='e' && n==5 && strcmp(azArg[0],"excel")==0)

  if( c=='s' && n==11 && strncmp(azArg[0], "selecttrace", n)==0 ){
    unsigned int x = nArg>=2 ? (unsigned int)integerValue(azArg[1]) : 0xffffffff;
    sqlite3_test_control(SQLITE_TESTCTRL_TRACEFLAGS, 1, &x);
  }else

#if defined(SQLITE_ENABLE_SESSION)
  if( c=='s' && strncmp(azArg[0],"session",n)==0 && n>=3 ){
    struct AuxDb *pAuxDb = p->pAuxDb;
    OpenSession *pSession = &pAuxDb->aSession[0];
    char **azCmd = &azArg[1];
    int iSes = 0;
    int nCmd = nArg - 1;
    int i;
    if( nArg<=1 ) goto session_syntax_error;
    open_db(p, 0);
    if( nArg>=3 ){
      for(iSes=0; iSes<pAuxDb->nSession; iSes++){
        if( strcmp(pAuxDb->aSession[iSes].zName, azArg[1])==0 ) break;
      }
      if( iSes<pAuxDb->nSession ){
        pSession = &pAuxDb->aSession[iSes];
        azCmd++;
        nCmd--;
      }else{
        pSession = &pAuxDb->aSession[0];
        iSes = 0;
      }
    }

    /* .session attach TABLE
    ** Invoke the sqlite3session_attach() interface to attach a particular
    ** table so that it is never filtered.

    }else

    /* .session close
    ** Close the identified session
    */
    if( strcmp(azCmd[0], "close")==0 ){
      if( nCmd!=1 ) goto session_syntax_error;
      if( pAuxDb->nSession ){
        session_close(pSession);
        pAuxDb->aSession[iSes] = pAuxDb->aSession[--pAuxDb->nSession];
      }
    }else

    /* .session enable ?BOOLEAN?
    ** Query or set the enable flag
    */
    if( strcmp(azCmd[0], "enable")==0 ){
      int ii;
      if( nCmd>2 ) goto session_syntax_error;
      ii = nCmd==1 ? -1 : booleanValue(azCmd[1]);
      if( pAuxDb->nSession ){
        ii = sqlite3session_enable(pSession->p, ii);
        utf8_printf(p->out, "session %s enable flag = %d\n",
                    pSession->zName, ii);
      }
    }else

    /* .session filter GLOB ....
    ** Set a list of GLOB patterns of table names to be excluded.
    */
    if( strcmp(azCmd[0], "filter")==0 ){
      int ii, nByte;
      if( nCmd<2 ) goto session_syntax_error;
      if( pAuxDb->nSession ){
        for(ii=0; ii<pSession->nFilter; ii++){
          sqlite3_free(pSession->azFilter[ii]);
        }
        sqlite3_free(pSession->azFilter);
        nByte = sizeof(pSession->azFilter[0])*(nCmd-1);
        pSession->azFilter = sqlite3_malloc( nByte );
        if( pSession->azFilter==0 ){

    /* .session indirect ?BOOLEAN?
    ** Query or set the indirect flag
    */
    if( strcmp(azCmd[0], "indirect")==0 ){
      int ii;
      if( nCmd>2 ) goto session_syntax_error;
      ii = nCmd==1 ? -1 : booleanValue(azCmd[1]);
      if( pAuxDb->nSession ){
        ii = sqlite3session_indirect(pSession->p, ii);
        utf8_printf(p->out, "session %s indirect flag = %d\n",
                    pSession->zName, ii);
      }
    }else

    /* .session isempty
    ** Determine if the session is empty
    */
    if( strcmp(azCmd[0], "isempty")==0 ){
      int ii;
      if( nCmd!=1 ) goto session_syntax_error;
      if( pAuxDb->nSession ){
        ii = sqlite3session_isempty(pSession->p);
        utf8_printf(p->out, "session %s isempty flag = %d\n",
                    pSession->zName, ii);
      }
    }else

    /* .session list
    ** List all currently open sessions
    */
    if( strcmp(azCmd[0],"list")==0 ){
      for(i=0; i<pAuxDb->nSession; i++){
        utf8_printf(p->out, "%d %s\n", i, pAuxDb->aSession[i].zName);
      }
    }else

    /* .session open DB NAME
    ** Open a new session called NAME on the attached database DB.
    ** DB is normally "main".
    */
    if( strcmp(azCmd[0],"open")==0 ){
      char *zName;
      if( nCmd!=3 ) goto session_syntax_error;
      zName = azCmd[2];
      if( zName[0]==0 ) goto session_syntax_error;
      for(i=0; i<pAuxDb->nSession; i++){
        if( strcmp(pAuxDb->aSession[i].zName,zName)==0 ){
          utf8_printf(stderr, "Session \"%s\" already exists\n", zName);
          goto meta_command_exit;
        }
      }
      if( pAuxDb->nSession>=ArraySize(pAuxDb->aSession) ){
        raw_printf(stderr, "Maximum of %d sessions\n", ArraySize(pAuxDb->aSession));
        goto meta_command_exit;
      }
      pSession = &pAuxDb->aSession[pAuxDb->nSession];
      rc = sqlite3session_create(p->db, azCmd[1], &pSession->p);
      if( rc ){
        raw_printf(stderr, "Cannot open session: error code=%d\n", rc);
        rc = 0;
        goto meta_command_exit;
      }
      pSession->nFilter = 0;
      sqlite3session_table_filter(pSession->p, session_filter, pSession);
      pAuxDb->nSession++;
      pSession->zName = sqlite3_mprintf("%s", zName);
    }else
    /* If no command name matches, show a syntax error */
    session_syntax_error:
    showHelp(p->out, "session");
  }else
#endif

    utf8_printf(p->out, "%12.12s: %s\n","stats", zOut);
    utf8_printf(p->out, "%12.12s: ", "width");
    for (i=0;i<p->nWidth;i++) {
      raw_printf(p->out, "%d ", p->colWidth[i]);
    }
    raw_printf(p->out, "\n");
    utf8_printf(p->out, "%12.12s: %s\n", "filename",
                p->pAuxDb->zDbFilename ? p->pAuxDb->zDbFilename : "");
  }else

  if( c=='s' && strncmp(azArg[0], "stats", n)==0 ){
    if( nArg==2 ){
      if( strcmp(azArg[1],"stmt")==0 ){
        p->statsOn = 2;
      }else if( strcmp(azArg[1],"vmstep")==0 ){

      { "parser_coverage",    SQLITE_TESTCTRL_PARSER_COVERAGE, ""             },
#endif
      { "pending_byte",       SQLITE_TESTCTRL_PENDING_BYTE,  "OFFSET  "       },
      { "prng_restore",       SQLITE_TESTCTRL_PRNG_RESTORE,  ""               },
      { "prng_save",          SQLITE_TESTCTRL_PRNG_SAVE,     ""               },
      { "prng_seed",          SQLITE_TESTCTRL_PRNG_SEED,     "SEED ?db?"      },
      { "seek_count",         SQLITE_TESTCTRL_SEEK_COUNT,    ""               },
      { "sorter_mmap",        SQLITE_TESTCTRL_SORTER_MMAP,   "NMAX"           },
      { "tune",               SQLITE_TESTCTRL_TUNE,          "ID VALUE"       },
    };
    int testctrl = -1;
    int iCtrl = -1;
    int rc2 = 0;    /* 0: usage.  1: %d  2: %x  3: no-output */
    int isOk = 0;
    int i, n2;

            }
            if( id>1 ) utf8_printf(p->out, "\n");
            isOk = 3;
          }
          break;
        }
#endif
        case SQLITE_TESTCTRL_SORTER_MMAP:
          if( nArg==3 ){
            int opt = (unsigned int)integerValue(azArg[2]);
            rc2 = sqlite3_test_control(testctrl, p->db, opt);
            isOk = 3;
          }
          break;
      }
    }
    if( isOk==0 && iCtrl>=0 ){
      utf8_printf(p->out, "Usage: .testctrl %s %s\n", zCmd,aCtrl[iCtrl].zUsage);
      rc = 1;
    }else if( isOk==1 ){
      raw_printf(p->out, "%d\n", rc2);

/*
** Initialize the state information in data
*/
static void main_init(ShellState *data) {
  memset(data, 0, sizeof(*data));
  data->normalMode = data->cMode = data->mode = MODE_List;
  data->autoExplain = 1;
  data->pAuxDb = &data->aAuxDb[0];
  memcpy(data->colSeparator,SEP_Column, 2);
  memcpy(data->rowSeparator,SEP_Row, 2);
  data->showHeader = 0;
  data->shellFlgs = SHFLG_Lookaside;
  verify_uninitialized();
  sqlite3_config(SQLITE_CONFIG_URI, 1);
  sqlite3_config(SQLITE_CONFIG_LOG, shellLog, data);

#ifdef SQLITE_SHELL_DBNAME_PROC
  {
    /* If the SQLITE_SHELL_DBNAME_PROC macro is defined, then it is the name
    ** of a C-function that will provide the name of the database file.  Use
    ** this compile-time option to embed this shell program in larger
    ** applications. */
    extern void SQLITE_SHELL_DBNAME_PROC(const char**);
    SQLITE_SHELL_DBNAME_PROC(&data.pAuxDb->zDbFilename);
    warnInmemoryDb = 0;
  }
#endif

  /* Do an initial pass through the command-line argument to locate
  ** the name of the database file, the name of the initialization file,
  ** the size of the alternative malloc heap,
  ** and the first command to execute.
  */
  verify_uninitialized();
  for(i=1; i<argc; i++){
    char *z;
    z = argv[i];
    if( z[0]!='-' ){
      if( data.aAuxDb->zDbFilename==0 ){
        data.aAuxDb->zDbFilename = z;
      }else{
        /* Excesss arguments are interpreted as SQL (or dot-commands) and
        ** mean that nothing is read from stdin */
        readStdin = 0;
        nCmd++;
        azCmd = realloc(azCmd, sizeof(azCmd[0])*nCmd);
        if( azCmd==0 ) shell_out_of_memory();

      sqlite3_vfs_register(pVfs, 1);
    }else{
      utf8_printf(stderr, "no such VFS: \"%s\"\n", argv[i]);
      exit(1);
    }
  }

  if( data.pAuxDb->zDbFilename==0 ){
#ifndef SQLITE_OMIT_MEMORYDB
    data.pAuxDb->zDbFilename = ":memory:";
    warnInmemoryDb = argc==1;
#else
    utf8_printf(stderr,"%s: Error: no database filename specified\n", Argv0);
    return 1;
#endif
  }
  data.out = stdout;
  sqlite3_appendvfs_init(0,0,0);

  /* Go ahead and open the database file if it already exists.  If the
  ** file does not exist, delay opening it.  This prevents empty database
  ** files from being created if a user mistypes the database name argument
  ** to the sqlite command-line tool.
  */
  if( access(data.pAuxDb->zDbFilename, 0)==0 ){
    open_db(&data, 0);
  }

  /* Process the initialization file if there is one.  If no -init option
  ** is given on the command line, look for a file named ~/.sqliterc and
  ** try to process it.
  */

      data.in = stdin;
      rc = process_input(&data);
    }
  }
  free(azCmd);
  set_table_name(&data, 0);
  if( data.db ){
    session_close_all(&data, -1);
    close_db(data.db);
  }
  for(i=0; i<ArraySize(data.aAuxDb); i++){
    sqlite3_free(data.aAuxDb[i].zFreeOnClose);
    if( data.aAuxDb[i].db ){
      session_close_all(&data, i);
      close_db(data.aAuxDb[i].db);
    }
  }
  find_home_dir(1);
  output_reset(&data);
  data.doXdgOpen = 0;
  clearTempFile(&data);
#if !SQLITE_SHELL_IS_UTF8
  for(i=0; i<argcToFree; i++) free(argvToFree[i]);
  free(argvToFree);

**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.37.0"
#define SQLITE_VERSION_NUMBER 3037000
#define SQLITE_SOURCE_ID      "2021-08-06 20:17:39 087b8b41c6ed76b55c11315e7e95679d67590be20ae21108b593d00bb7d1c57a"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros

** Set the SQLITE_PTRSIZE macro to the number of bytes in a pointer
*/
#ifndef SQLITE_PTRSIZE
# if defined(__SIZEOF_POINTER__)
#   define SQLITE_PTRSIZE __SIZEOF_POINTER__
# elif defined(i386)     || defined(__i386__)   || defined(_M_IX86) ||    \
       defined(_M_ARM)   || defined(__arm__)    || defined(__x86)   ||    \
      (defined(__APPLE__) && defined(__POWERPC__)) ||                     \
      (defined(__TOS_AIX__) && !defined(__64BIT__))
#   define SQLITE_PTRSIZE 4
# else
#   define SQLITE_PTRSIZE 8
# endif
#endif

**
**   "storage column index"   This is the index of the column in the
**                            record BLOB generated by the OP_MakeRecord
**                            opcode.  The storage column index is less than
**                            or equal to the table column index.  It is
**                            equal if and only if there are no VIRTUAL
**                            columns to the left.
**
** Notes on zCnName:
** The zCnName field stores the name of the column, the datatype of the
** column, and the collating sequence for the column, in that order, all in
** a single allocation.  Each string is 0x00 terminated.  The datatype
** is only included if the COLFLAG_HASTYPE bit of colFlags is set and the
** collating sequence name is only included if the COLFLAG_HASCOLL bit is
** set.
*/
struct Column {
  char *zCnName;        /* Name of this column */


  unsigned notNull :4;  /* An OE_ code for handling a NOT NULL constraint */
  unsigned eType :4;    /* One of the standard types */
  char affinity;        /* One of the SQLITE_AFF_... values */
  u8 szEst;             /* Est size of value in this column. sizeof(INT)==1 */
  u8 hName;             /* Column name hash for faster lookup */
  u16 iDflt;            /* 1-based index of DEFAULT.  0 means "none" */
  u16 colFlags;         /* Boolean properties.  See COLFLAG_ defines below */
};

/* Allowed values for Column.eType.
**
** Values must match entries in the global constant arrays
** sqlite3StdTypeLen[] and sqlite3StdType[].  Each value is one more
** than the offset into these arrays for the corresponding name.
** Adjust the SQLITE_N_STDTYPE value if adding or removing entries.
*/
#define COLTYPE_CUSTOM      0   /* Type appended to zName */
#define COLTYPE_BLOB        1
#define COLTYPE_INT         2
#define COLTYPE_INTEGER     3
#define COLTYPE_REAL        4
#define COLTYPE_TEXT        5
#define SQLITE_N_STDTYPE    5  /* Number of standard types */

/* Allowed values for Column.colFlags.
**
** Constraints:
**         TF_HasVirtual == COLFLAG_VIRTUAL
**         TF_HasStored  == COLFLAG_STORED
**         TF_HasHidden  == COLFLAG_HIDDEN
*/
#define COLFLAG_PRIMKEY   0x0001   /* Column is part of the primary key */
#define COLFLAG_HIDDEN    0x0002   /* A hidden column in a virtual table */
#define COLFLAG_HASTYPE   0x0004   /* Type name follows column name */
#define COLFLAG_UNIQUE    0x0008   /* Column def contains "UNIQUE" or "PK" */
#define COLFLAG_SORTERREF 0x0010   /* Use sorter-refs with this column */
#define COLFLAG_VIRTUAL   0x0020   /* GENERATED ALWAYS AS ... VIRTUAL */
#define COLFLAG_STORED    0x0040   /* GENERATED ALWAYS AS ... STORED */
#define COLFLAG_NOTAVAIL  0x0080   /* STORED column not yet calculated */
#define COLFLAG_BUSY      0x0100   /* Blocks recursion on GENERATED columns */
#define COLFLAG_HASCOLL   0x0200   /* Has collating sequence name in zCnName */
#define COLFLAG_GENERATED 0x0060   /* Combo: _STORED, _VIRTUAL */
#define COLFLAG_NOINSERT  0x0062   /* Combo: _HIDDEN, _STORED, _VIRTUAL */

/*
** A "Collating Sequence" is defined by an instance of the following
** structure. Conceptually, a collating sequence consists of a name and
** a comparison routine that defines the order of that sequence.

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

/*
** The schema for each SQL table, virtual table, and view is represented
** in memory by an instance of the following structure.
*/
struct Table {
  char *zName;         /* Name of the table or view */
  Column *aCol;        /* Information about each column */
  Index *pIndex;       /* List of SQL indexes on this table. */


  char *zColAff;       /* String defining the affinity of each column */
  ExprList *pCheck;    /* All CHECK constraints */
                       /*   ... also used as column name list in a VIEW */
  Pgno tnum;           /* Root BTree page for this table */
  u32 nTabRef;         /* Number of pointers to this Table */
  u32 tabFlags;        /* Mask of TF_* values */
  i16 iPKey;           /* If not negative, use aCol[iPKey] as the rowid */
  i16 nCol;            /* Number of columns in this table */
  i16 nNVCol;          /* Number of columns that are not VIRTUAL */
  LogEst nRowLogEst;   /* Estimated rows in table - from sqlite_stat1 table */
  LogEst szTabRow;     /* Estimated size of each table row in bytes */
#ifdef SQLITE_ENABLE_COSTMULT
  LogEst costMult;     /* Cost multiplier for using this table */
#endif
  u8 keyConf;          /* What to do in case of uniqueness conflict on iPKey */
  u8 eTabType;         /* 0: normal, 1: virtual, 2: view */
  union {
    struct {             /* Used by ordinary tables: */
      int addColOffset;    /* Offset in CREATE TABLE stmt to add a new column */
      FKey *pFKey;         /* Linked list of all foreign keys in this table */
      ExprList *pDfltList; /* DEFAULT clauses on various columns.
                           ** Or the AS clause for generated columns. */
    } tab;
    struct {             /* Used by views: */
      Select *pSelect;     /* View definition */
    } view;

    struct {             /* Used by virtual tables only: */
      int nArg;            /* Number of arguments to the module */
      char **azArg;        /* 0: module 1: schema 2: vtab name 3...: args */
      VTable *p;           /* List of VTable objects. */

    } vtab;
  } u;
  Trigger *pTrigger;   /* List of triggers on this object */
  Schema *pSchema;     /* Schema that contains this table */
};

/*
** Allowed values for Table.tabFlags.
**
** TF_OOOHidden applies to tables or view that have hidden columns that are
** followed by non-hidden columns.  Example:  "CREATE VIRTUAL TABLE x USING
** vtab1(a HIDDEN, b);".  Since "b" is a non-hidden column but "a" is hidden,
** the TF_OOOHidden attribute would apply in this case.  Such tables require
** special handling during INSERT processing. The "OOO" means "Out Of Order".
**
** Constraints:
**
**         TF_HasVirtual == COLFLAG_VIRTUAL
**         TF_HasStored  == COLFLAG_STORED
**         TF_HasHidden  == COLFLAG_HIDDEN
*/
#define TF_Readonly       0x00000001 /* Read-only system table */
#define TF_HasHidden      0x00000002 /* Has one or more hidden columns */
#define TF_HasPrimaryKey  0x00000004 /* Table has a primary key */
#define TF_Autoincrement  0x00000008 /* Integer primary key is autoincrement */
#define TF_HasStat1       0x00000010 /* nRowLogEst set from sqlite_stat1 */
#define TF_HasVirtual     0x00000020 /* Has one or more VIRTUAL columns */
#define TF_HasStored      0x00000040 /* Has one or more STORED columns */
#define TF_HasGenerated   0x00000060 /* Combo: HasVirtual + HasStored */
#define TF_WithoutRowid   0x00000080 /* No rowid.  PRIMARY KEY is the key */
#define TF_StatsUsed      0x00000100 /* Query planner decisions affected by
                                     ** Index.aiRowLogEst[] values */
#define TF_NoVisibleRowid 0x00000200 /* No user-visible "rowid" column */
#define TF_OOOHidden      0x00000400 /* Out-of-Order hidden columns */
#define TF_HasNotNull     0x00000800 /* Contains NOT NULL constraints */
#define TF_Shadow         0x00001000 /* True for a shadow table */
#define TF_HasStat4       0x00002000 /* STAT4 info available for this table */
#define TF_Ephemeral      0x00004000 /* An ephemeral table */
#define TF_Eponymous      0x00008000 /* An eponymous virtual table */

/*
** Allowed values for Table.eTabType
*/
#define TABTYP_NORM      0     /* Ordinary table */
#define TABTYP_VTAB      1     /* Virtual table */
#define TABTYP_VIEW      2     /* A view */

#define IsView(X)           ((X)->eTabType==TABTYP_VIEW)
#define IsOrdinaryTable(X)  ((X)->eTabType==TABTYP_NORM)

/*
** Test to see whether or not a table is a virtual table.  This is
** done as a macro so that it will be optimized out when virtual
** table support is omitted from the build.
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#  define IsVirtual(X)      ((X)->eTabType==TABTYP_VTAB)
#  define ExprIsVtab(X)  \
    ((X)->op==TK_COLUMN && (X)->y.pTab!=0 && (X)->y.pTab->eTabType==TABTYP_VTAB)
#else
#  define IsVirtual(X)      0
#  define ExprIsVtab(X)     0
#endif

/*
** Macros to determine if a column is hidden.  IsOrdinaryHiddenColumn()

SQLITE_PRIVATE void sqlite3SetString(char **, sqlite3*, const char*);
SQLITE_PRIVATE void sqlite3ErrorMsg(Parse*, const char*, ...);
SQLITE_PRIVATE int sqlite3ErrorToParser(sqlite3*,int);
SQLITE_PRIVATE void sqlite3Dequote(char*);
SQLITE_PRIVATE void sqlite3DequoteExpr(Expr*);
SQLITE_PRIVATE void sqlite3DequoteToken(Token*);
SQLITE_PRIVATE void sqlite3TokenInit(Token*,char*);
SQLITE_PRIVATE int sqlite3KeywordCode(const unsigned char*, int);
SQLITE_PRIVATE int sqlite3RunParser(Parse*, const char*, char **);
SQLITE_PRIVATE void sqlite3FinishCoding(Parse*);
SQLITE_PRIVATE int sqlite3GetTempReg(Parse*);
SQLITE_PRIVATE void sqlite3ReleaseTempReg(Parse*,int);
SQLITE_PRIVATE int sqlite3GetTempRange(Parse*,int);

#ifndef SQLITE_OMIT_VIRTUALTABLE
SQLITE_PRIVATE Module *sqlite3PragmaVtabRegister(sqlite3*,const char *zName);
#endif
SQLITE_PRIVATE void sqlite3ResetAllSchemasOfConnection(sqlite3*);
SQLITE_PRIVATE void sqlite3ResetOneSchema(sqlite3*,int);
SQLITE_PRIVATE void sqlite3CollapseDatabaseArray(sqlite3*);
SQLITE_PRIVATE void sqlite3CommitInternalChanges(sqlite3*);
SQLITE_PRIVATE void sqlite3ColumnSetExpr(Parse*,Table*,Column*,Expr*);
SQLITE_PRIVATE Expr *sqlite3ColumnExpr(Table*,Column*);
SQLITE_PRIVATE void sqlite3ColumnSetColl(sqlite3*,Column*,const char*zColl);
SQLITE_PRIVATE const char *sqlite3ColumnColl(Column*);
SQLITE_PRIVATE void sqlite3DeleteColumnNames(sqlite3*,Table*);
SQLITE_PRIVATE void sqlite3GenerateColumnNames(Parse *pParse, Select *pSelect);
SQLITE_PRIVATE int sqlite3ColumnsFromExprList(Parse*,ExprList*,i16*,Column**);
SQLITE_PRIVATE void sqlite3SelectAddColumnTypeAndCollation(Parse*,Table*,Select*,char);
SQLITE_PRIVATE Table *sqlite3ResultSetOfSelect(Parse*,Select*,char);
SQLITE_PRIVATE void sqlite3OpenSchemaTable(Parse *, int);
SQLITE_PRIVATE Index *sqlite3PrimaryKeyIndex(Table*);

#endif
SQLITE_PRIVATE void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int);
#if SQLITE_ENABLE_HIDDEN_COLUMNS
SQLITE_PRIVATE   void sqlite3ColumnPropertiesFromName(Table*, Column*);
#else
# define sqlite3ColumnPropertiesFromName(T,C) /* no-op */
#endif
SQLITE_PRIVATE void sqlite3AddColumn(Parse*,Token,Token);
SQLITE_PRIVATE void sqlite3AddNotNull(Parse*, int);
SQLITE_PRIVATE void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int);
SQLITE_PRIVATE void sqlite3AddCheckConstraint(Parse*, Expr*, const char*, const char*);
SQLITE_PRIVATE void sqlite3AddDefaultValue(Parse*,Expr*,const char*,const char*);
SQLITE_PRIVATE void sqlite3AddCollateType(Parse*, Token*);
SQLITE_PRIVATE void sqlite3AddGenerated(Parse*,Expr*,Token*);
SQLITE_PRIVATE void sqlite3EndTable(Parse*,Token*,Token*,u8,Select*);

SQLITE_PRIVATE int sqlite3WhereUsesDeferredSeek(WhereInfo*);
SQLITE_PRIVATE void sqlite3ExprCodeLoadIndexColumn(Parse*, Index*, int, int, int);
SQLITE_PRIVATE int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, u8);
SQLITE_PRIVATE void sqlite3ExprCodeGetColumnOfTable(Vdbe*, Table*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCodeMove(Parse*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCode(Parse*, Expr*, int);
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
SQLITE_PRIVATE void sqlite3ExprCodeGeneratedColumn(Parse*, Table*, Column*, int);
#endif
SQLITE_PRIVATE void sqlite3ExprCodeCopy(Parse*, Expr*, int);
SQLITE_PRIVATE void sqlite3ExprCodeFactorable(Parse*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprCodeRunJustOnce(Parse*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprCodeTemp(Parse*, Expr*, int*);
SQLITE_PRIVATE int sqlite3ExprCodeTarget(Parse*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int, u8);

SQLITE_PRIVATE char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8);
#endif
SQLITE_PRIVATE int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **);
SQLITE_PRIVATE void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
#ifndef SQLITE_AMALGAMATION
SQLITE_PRIVATE const unsigned char sqlite3OpcodeProperty[];
SQLITE_PRIVATE const char sqlite3StrBINARY[];
SQLITE_PRIVATE const unsigned char sqlite3StdTypeLen[];
SQLITE_PRIVATE const char sqlite3StdTypeAffinity[];
SQLITE_PRIVATE const char *sqlite3StdType[];
SQLITE_PRIVATE const unsigned char sqlite3UpperToLower[];
SQLITE_PRIVATE const unsigned char *sqlite3aLTb;
SQLITE_PRIVATE const unsigned char *sqlite3aEQb;
SQLITE_PRIVATE const unsigned char *sqlite3aGTb;
SQLITE_PRIVATE const unsigned char sqlite3CtypeMap[];
SQLITE_PRIVATE SQLITE_WSD struct Sqlite3Config sqlite3Config;
SQLITE_PRIVATE FuncDefHash sqlite3BuiltinFunctions;

#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
SQLITE_PRIVATE const char **sqlite3CompileOptions(int *pnOpt);
#endif

#endif /* SQLITEINT_H */

/************** End of sqliteInt.h *******************************************/
/************** Begin file os_common.h ***************************************/
/*
** 2004 May 22
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains macros and a little bit of code that is common to
** all of the platform-specific files (os_*.c) and is #included into those
** files.
**
** This file should be #included by the os_*.c files only.  It is not a
** general purpose header file.
*/
#ifndef _OS_COMMON_H_
#define _OS_COMMON_H_

/*
** At least two bugs have slipped in because we changed the MEMORY_DEBUG
** macro to SQLITE_DEBUG and some older makefiles have not yet made the
** switch.  The following code should catch this problem at compile-time.
*/
#ifdef MEMORY_DEBUG
# error "The MEMORY_DEBUG macro is obsolete.  Use SQLITE_DEBUG instead."
#endif

/*
** Macros for performance tracing.  Normally turned off.  Only works
** on i486 hardware.
*/
#ifdef SQLITE_PERFORMANCE_TRACE

/*
** hwtime.h contains inline assembler code for implementing
** high-performance timing routines.
*/
/************** Include hwtime.h in the middle of os_common.h ****************/
/************** Begin file hwtime.h ******************************************/
/*
** 2008 May 27
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains inline asm code for retrieving "high-performance"
** counters for x86 and x86_64 class CPUs.
*/
#ifndef SQLITE_HWTIME_H
#define SQLITE_HWTIME_H

/*
** The following routine only works on pentium-class (or newer) processors.
** It uses the RDTSC opcode to read the cycle count value out of the
** processor and returns that value.  This can be used for high-res
** profiling.
*/
#if !defined(__STRICT_ANSI__) && \
    (defined(__GNUC__) || defined(_MSC_VER)) && \
    (defined(i386) || defined(__i386__) || defined(_M_IX86))

  #if defined(__GNUC__)

  __inline__ sqlite_uint64 sqlite3Hwtime(void){
     unsigned int lo, hi;
     __asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
     return (sqlite_uint64)hi << 32 | lo;
  }

  #elif defined(_MSC_VER)

  __declspec(naked) __inline sqlite_uint64 __cdecl sqlite3Hwtime(void){
     __asm {
        rdtsc
        ret       ; return value at EDX:EAX
     }
  }

  #endif

#elif !defined(__STRICT_ANSI__) && (defined(__GNUC__) && defined(__x86_64__))

  __inline__ sqlite_uint64 sqlite3Hwtime(void){
      unsigned long val;
      __asm__ __volatile__ ("rdtsc" : "=A" (val));
      return val;
  }

#elif !defined(__STRICT_ANSI__) && (defined(__GNUC__) && defined(__ppc__))

  __inline__ sqlite_uint64 sqlite3Hwtime(void){
      unsigned long long retval;
      unsigned long junk;
      __asm__ __volatile__ ("\n\
          1:      mftbu   %1\n\
                  mftb    %L0\n\
                  mftbu   %0\n\
                  cmpw    %0,%1\n\
                  bne     1b"
                  : "=r" (retval), "=r" (junk));
      return retval;
  }

#else

  /*
  ** asm() is needed for hardware timing support.  Without asm(),
  ** disable the sqlite3Hwtime() routine.
  **
  ** sqlite3Hwtime() is only used for some obscure debugging
  ** and analysis configurations, not in any deliverable, so this
  ** should not be a great loss.
  */
SQLITE_PRIVATE   sqlite_uint64 sqlite3Hwtime(void){ return ((sqlite_uint64)0); }

#endif

#endif /* !defined(SQLITE_HWTIME_H) */

/************** End of hwtime.h **********************************************/
/************** Continuing where we left off in os_common.h ******************/

static sqlite_uint64 g_start;
static sqlite_uint64 g_elapsed;
#define TIMER_START       g_start=sqlite3Hwtime()
#define TIMER_END         g_elapsed=sqlite3Hwtime()-g_start
#define TIMER_ELAPSED     g_elapsed
#else
#define TIMER_START
#define TIMER_END
#define TIMER_ELAPSED     ((sqlite_uint64)0)
#endif

/*
** If we compile with the SQLITE_TEST macro set, then the following block
** of code will give us the ability to simulate a disk I/O error.  This
** is used for testing the I/O recovery logic.
*/
#if defined(SQLITE_TEST)
SQLITE_API extern int sqlite3_io_error_hit;
SQLITE_API extern int sqlite3_io_error_hardhit;
SQLITE_API extern int sqlite3_io_error_pending;
SQLITE_API extern int sqlite3_io_error_persist;
SQLITE_API extern int sqlite3_io_error_benign;
SQLITE_API extern int sqlite3_diskfull_pending;
SQLITE_API extern int sqlite3_diskfull;
#define SimulateIOErrorBenign(X) sqlite3_io_error_benign=(X)
#define SimulateIOError(CODE)  \
  if( (sqlite3_io_error_persist && sqlite3_io_error_hit) \
       || sqlite3_io_error_pending-- == 1 )  \
              { local_ioerr(); CODE; }
static void local_ioerr(){
  IOTRACE(("IOERR\n"));
  sqlite3_io_error_hit++;
  if( !sqlite3_io_error_benign ) sqlite3_io_error_hardhit++;
}
#define SimulateDiskfullError(CODE) \
   if( sqlite3_diskfull_pending ){ \
     if( sqlite3_diskfull_pending == 1 ){ \
       local_ioerr(); \
       sqlite3_diskfull = 1; \
       sqlite3_io_error_hit = 1; \
       CODE; \
     }else{ \
       sqlite3_diskfull_pending--; \
     } \
   }
#else
#define SimulateIOErrorBenign(X)
#define SimulateIOError(A)
#define SimulateDiskfullError(A)
#endif /* defined(SQLITE_TEST) */

/*
** When testing, keep a count of the number of open files.
*/
#if defined(SQLITE_TEST)
SQLITE_API extern int sqlite3_open_file_count;
#define OpenCounter(X)  sqlite3_open_file_count+=(X)
#else
#define OpenCounter(X)
#endif /* defined(SQLITE_TEST) */

#endif /* !defined(_OS_COMMON_H_) */

/************** End of os_common.h *******************************************/
/************** Begin file ctime.c *******************************************/
/*
** 2010 February 23
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**

*/
SQLITE_PRIVATE const unsigned char sqlite3OpcodeProperty[] = OPFLG_INITIALIZER;

/*
** Name of the default collating sequence
*/
SQLITE_PRIVATE const char sqlite3StrBINARY[] = "BINARY";

/*
** Standard typenames.  These names must match the COLTYPE_* definitions.
** Adjust the SQLITE_N_STDTYPE value if adding or removing entries.
*/
SQLITE_PRIVATE const unsigned char sqlite3StdTypeLen[] = { 4, 3, 7, 4, 4 };
SQLITE_PRIVATE const char sqlite3StdTypeAffinity[] = {
  SQLITE_AFF_BLOB,
  SQLITE_AFF_INTEGER,
  SQLITE_AFF_INTEGER,
  SQLITE_AFF_REAL,
  SQLITE_AFF_TEXT
};
SQLITE_PRIVATE const char *sqlite3StdType[] = {
  "BLOB",
  "INT",
  "INTEGER",
  "REAL",
  "TEXT"
};

/************** End of global.c **********************************************/
/************** Begin file status.c ******************************************/
/*
** 2008 June 18
**
** The author disclaims copyright to this source code.  In place of

*/
/* #include "sqliteInt.h" */

#if SQLITE_OS_WIN
/*
** Include code that is common to all os_*.c files
*/























/* #include "os_common.h" */
















































































































































































/*
** Include the header file for the Windows VFS.
*/
/************** Include os_win.h in the middle of mutex_w32.c ****************/
/************** Begin file os_win.h ******************************************/
/*

      break;
    }
    case TK_NULL: {
      sqlite3TreeViewLine(pView,"NULL");
      break;
    }
    case TK_TRUEFALSE: {
      sqlite3TreeViewLine(pView,"%s%s",
         sqlite3ExprTruthValue(pExpr) ? "TRUE" : "FALSE", zFlgs);
      break;
    }
#ifndef SQLITE_OMIT_BLOB_LITERAL
    case TK_BLOB: {
      sqlite3TreeViewLine(pView,"%s", pExpr->u.zToken);
      break;
    }

** Return the declared type of a column.  Or return zDflt if the column
** has no declared type.
**
** The column type is an extra string stored after the zero-terminator on
** the column name if and only if the COLFLAG_HASTYPE flag is set.
*/
SQLITE_PRIVATE char *sqlite3ColumnType(Column *pCol, char *zDflt){
  if( pCol->colFlags & COLFLAG_HASTYPE ){
    return pCol->zCnName + strlen(pCol->zCnName) + 1;
  }else if( pCol->eType ){
    assert( pCol->eType<=SQLITE_N_STDTYPE );
    return (char*)sqlite3StdType[pCol->eType-1];
  }else{
    return zDflt;
  }
}

/*
** Helper function for sqlite3Error() - called rarely.  Broken out into
** a separate routine to avoid unnecessary register saves on entry to
** sqlite3Error().
*/

  z[j] = 0;
}
SQLITE_PRIVATE void sqlite3DequoteExpr(Expr *p){
  assert( sqlite3Isquote(p->u.zToken[0]) );
  p->flags |= p->u.zToken[0]=='"' ? EP_Quoted|EP_DblQuoted : EP_Quoted;
  sqlite3Dequote(p->u.zToken);
}

/*
** If the input token p is quoted, try to adjust the token to remove
** the quotes.  This is not always possible:
**
**     "abc"     ->   abc
**     "ab""cd"  ->   (not possible because of the interior "")
**
** Remove the quotes if possible.  This is a optimization.  The overall
** system should still return the correct answer even if this routine
** is always a no-op.
*/
SQLITE_PRIVATE void sqlite3DequoteToken(Token *p){
  unsigned int i;
  if( p->n<2 ) return;
  if( !sqlite3Isquote(p->z[0]) ) return;
  for(i=1; i<p->n-1; i++){
    if( sqlite3Isquote(p->z[i]) ) return;
  }
  p->n -= 2;
  p->z++;
}

/*
** Generate a Token object from a string
*/
SQLITE_PRIVATE void sqlite3TokenInit(Token *p, char *z){
  p->z = z;
  p->n = sqlite3Strlen30(z);

#define UNIXFILE_DELETE      0x20     /* Delete on close */
#define UNIXFILE_URI         0x40     /* Filename might have query parameters */
#define UNIXFILE_NOLOCK      0x80     /* Do no file locking */

/*
** Include code that is common to all os_*.c files
*/























/* #include "os_common.h" */
















































































































































































/*
** Define various macros that are missing from some systems.
*/
#ifndef O_LARGEFILE
# define O_LARGEFILE 0
#endif

*/
/* #include "sqliteInt.h" */
#if SQLITE_OS_WIN               /* This file is used for Windows only */

/*
** Include code that is common to all os_*.c files
*/























/* #include "os_common.h" */
















































































































































































/*
** Include the header file for the Windows VFS.
*/
/* #include "os_win.h" */

/*

** in the mxFrame field.
**
** Each index block except for the first contains information on
** HASHTABLE_NPAGE frames. The first index block contains information on
** HASHTABLE_NPAGE_ONE frames. The values of HASHTABLE_NPAGE_ONE and
** HASHTABLE_NPAGE are selected so that together the wal-index header and
** first index block are the same size as all other index blocks in the
** wal-index.  The values are:
**
**   HASHTABLE_NPAGE      4096
**   HASHTABLE_NPAGE_ONE  4062
**
** Each index block contains two sections, a page-mapping that contains the
** database page number associated with each wal frame, and a hash-table
** that allows readers to query an index block for a specific page number.
** The page-mapping is an array of HASHTABLE_NPAGE (or HASHTABLE_NPAGE_ONE
** for the first index block) 32-bit page numbers. The first entry in the
** first index-block contains the database page number corresponding to the

  u32 aReadMark[WAL_NREADER];     /* Reader marks */
  u8 aLock[SQLITE_SHM_NLOCK];     /* Reserved space for locks */
  u32 nBackfillAttempted;         /* WAL frames perhaps written, or maybe not */
  u32 notUsed0;                   /* Available for future enhancements */
};
#define READMARK_NOT_USED  0xffffffff

/*
** This is a schematic view of the complete 136-byte header of the
** wal-index file (also known as the -shm file):
**
**      +-----------------------------+
**   0: | iVersion                    | \
**      +-----------------------------+  |
**   4: | (unused padding)            |  |
**      +-----------------------------+  |
**   8: | iChange                     |  |
**      +-------+-------+-------------+  |
**  12: | bInit |  bBig |   szPage    |  |
**      +-------+-------+-------------+  |
**  16: | mxFrame                     |  |  First copy of the
**      +-----------------------------+  |  WalIndexHdr object
**  20: | nPage                       |  |
**      +-----------------------------+  |
**  24: | aFrameCksum                 |  |
**      |                             |  |
**      +-----------------------------+  |
**  32: | aSalt                       |  |
**      |                             |  |
**      +-----------------------------+  |
**  40: | aCksum                      |  |
**      |                             | /
**      +-----------------------------+
**  48: | iVersion                    | \
**      +-----------------------------+  |
**  52: | (unused padding)            |  |
**      +-----------------------------+  |
**  56: | iChange                     |  |
**      +-------+-------+-------------+  |
**  60: | bInit |  bBig |   szPage    |  |
**      +-------+-------+-------------+  |  Second copy of the
**  64: | mxFrame                     |  |  WalIndexHdr
**      +-----------------------------+  |
**  68: | nPage                       |  |
**      +-----------------------------+  |
**  72: | aFrameCksum                 |  |
**      |                             |  |
**      +-----------------------------+  |
**  80: | aSalt                       |  |
**      |                             |  |
**      +-----------------------------+  |
**  88: | aCksum                      |  |
**      |                             | /
**      +-----------------------------+
**  96: | nBackfill                   |
**      +-----------------------------+
** 100: | 5 read marks                |
**      |                             |
**      |                             |
**      |                             |
**      |                             |
**      +-------+-------+------+------+
** 120: | Write | Ckpt  | Rcvr | Rd0  | \
**      +-------+-------+------+------+  ) 8 lock bytes
**      | Read1 | Read2 | Rd3  | Rd4  | /
**      +-------+-------+------+------+
** 128: | nBackfillAttempted          |
**      +-----------------------------+
** 132: | (unused padding)            |
**      +-----------------------------+
*/

/* A block of WALINDEX_LOCK_RESERVED bytes beginning at
** WALINDEX_LOCK_OFFSET is reserved for locks. Since some systems
** only support mandatory file-locks, we do not read or write data
** from the region of the file on which locks are applied.
*/
#define WALINDEX_LOCK_OFFSET (sizeof(WalIndexHdr)*2+offsetof(WalCkptInfo,aLock))

){
  int rc;                         /* Return Code */
  Wal *pRet;                      /* Object to allocate and return */
  int flags;                      /* Flags passed to OsOpen() */

  assert( zWalName && zWalName[0] );
  assert( pDbFd );

  /* Verify the values of various constants.  Any changes to the values
  ** of these constants would result in an incompatible on-disk format
  ** for the -shm file.  Any change that causes one of these asserts to
  ** fail is a backward compatibility problem, even if the change otherwise
  ** works.
  **
  ** This table also serves as a helpful cross-reference when trying to
  ** interpret hex dumps of the -shm file.
  */
  assert(    48 ==  sizeof(WalIndexHdr)  );
  assert(    40 ==  sizeof(WalCkptInfo)  );
  assert(   120 ==  WALINDEX_LOCK_OFFSET );
  assert(   136 ==  WALINDEX_HDR_SIZE    );
  assert(  4096 ==  HASHTABLE_NPAGE      );
  assert(  4062 ==  HASHTABLE_NPAGE_ONE  );
  assert(  8192 ==  HASHTABLE_NSLOT      );
  assert(   383 ==  HASHTABLE_HASH_1     );
  assert( 32768 ==  WALINDEX_PGSZ        );
  assert(     8 ==  SQLITE_SHM_NLOCK     );
  assert(     5 ==  WAL_NREADER          );
  assert(    24 ==  WAL_FRAME_HDRSIZE    );
  assert(    32 ==  WAL_HDRSIZE          );
  assert(   120 ==  WALINDEX_LOCK_OFFSET + WAL_WRITE_LOCK   );
  assert(   121 ==  WALINDEX_LOCK_OFFSET + WAL_CKPT_LOCK    );
  assert(   122 ==  WALINDEX_LOCK_OFFSET + WAL_RECOVER_LOCK );
  assert(   123 ==  WALINDEX_LOCK_OFFSET + WAL_READ_LOCK(0) );
  assert(   124 ==  WALINDEX_LOCK_OFFSET + WAL_READ_LOCK(1) );
  assert(   125 ==  WALINDEX_LOCK_OFFSET + WAL_READ_LOCK(2) );
  assert(   126 ==  WALINDEX_LOCK_OFFSET + WAL_READ_LOCK(3) );
  assert(   127 ==  WALINDEX_LOCK_OFFSET + WAL_READ_LOCK(4) );

  /* In the amalgamation, the os_unix.c and os_win.c source files come before
  ** this source file.  Verify that the #defines of the locking byte offsets
  ** in os_unix.c and os_win.c agree with the WALINDEX_LOCK_OFFSET value.
  ** For that matter, if the lock offset ever changes from its initial design
  ** value of 120, we need to know that so there is an assert() to check it.
  */


#ifdef WIN_SHM_BASE
  assert( WIN_SHM_BASE==WALINDEX_LOCK_OFFSET );
#endif
#ifdef UNIX_SHM_BASE
  assert( UNIX_SHM_BASE==WALINDEX_LOCK_OFFSET );
#endif

      displayP4Expr(&x, pOp->p4.pExpr);
      break;
    }
#endif
    case P4_COLLSEQ: {
      static const char *const encnames[] = {"?", "8", "16LE", "16BE"};
      CollSeq *pColl = pOp->p4.pColl;
      assert( pColl->enc<4 );
      sqlite3_str_appendf(&x, "%.18s-%s", pColl->zName,
                          encnames[pColl->enc]);
      break;
    }
    case P4_FUNCDEF: {
      FuncDef *pDef = pOp->p4.pFunc;
      sqlite3_str_appendf(&x, "%s(%d)", pDef->zName, pDef->nArg);

#ifdef VDBE_PROFILE

/*
** hwtime.h contains inline assembler code for implementing
** high-performance timing routines.
*/



















/* #include "hwtime.h" */







































































#endif

#ifndef NDEBUG
/*
** This function is only called from within an assert() expression. It
** checks that the sqlite3.nTransaction variable is correctly set to

      sqlite3ErrorMsg(&sParse, "cannot open virtual table: %s", zTable);
    }
    if( pTab && !HasRowid(pTab) ){
      pTab = 0;
      sqlite3ErrorMsg(&sParse, "cannot open table without rowid: %s", zTable);
    }
#ifndef SQLITE_OMIT_VIEW
    if( pTab && IsView(pTab) ){
      pTab = 0;
      sqlite3ErrorMsg(&sParse, "cannot open view: %s", zTable);
    }
#endif
    if( !pTab ){
      if( sParse.zErrMsg ){
        sqlite3DbFree(db, zErr);
        zErr = sParse.zErrMsg;
        sParse.zErrMsg = 0;
      }
      rc = SQLITE_ERROR;
      sqlite3BtreeLeaveAll(db);
      goto blob_open_out;
    }
    pBlob->pTab = pTab;
    pBlob->zDb = db->aDb[sqlite3SchemaToIndex(db, pTab->pSchema)].zDbSName;

    /* Now search pTab for the exact column. */
    for(iCol=0; iCol<pTab->nCol; iCol++) {
      if( sqlite3StrICmp(pTab->aCol[iCol].zCnName, zColumn)==0 ){
        break;
      }
    }
    if( iCol==pTab->nCol ){
      sqlite3DbFree(db, zErr);
      zErr = sqlite3MPrintf(db, "no such column: \"%s\"", zColumn);
      rc = SQLITE_ERROR;

#ifndef SQLITE_OMIT_FOREIGN_KEY
      if( db->flags&SQLITE_ForeignKeys ){
        /* Check that the column is not part of an FK child key definition. It
        ** is not necessary to check if it is part of a parent key, as parent
        ** key columns must be indexed. The check below will pick up this
        ** case.  */
        FKey *pFKey;
        assert( !IsVirtual(pTab) );
        for(pFKey=pTab->u.tab.pFKey; pFKey; pFKey=pFKey->pNextFrom){
          int j;
          for(j=0; j<pFKey->nCol; j++){
            if( pFKey->aCol[j].iFrom==iCol ){
              zFault = "foreign key";
            }
          }
        }

          }
          if( IN_RENAME_OBJECT && pItem->zAlias ){
            sqlite3RenameTokenRemap(pParse, 0, (void*)&pExpr->y.pTab);
          }
        }
        hCol = sqlite3StrIHash(zCol);
        for(j=0, pCol=pTab->aCol; j<pTab->nCol; j++, pCol++){
          if( pCol->hName==hCol
           && sqlite3StrICmp(pCol->zCnName, zCol)==0
          ){
            /* If there has been exactly one prior match and this match
            ** is for the right-hand table of a NATURAL JOIN or is in a
            ** USING clause, then skip this match.
            */
            if( cnt==1 ){
              if( pItem->fg.jointype & JT_NATURAL ) continue;
              if( nameInUsingClause(pItem->pUsing, zCol) ) continue;

      if( pTab ){
        int iCol;
        u8 hCol = sqlite3StrIHash(zCol);
        pSchema = pTab->pSchema;
        cntTab++;
        for(iCol=0, pCol=pTab->aCol; iCol<pTab->nCol; iCol++, pCol++){
          if( pCol->hName==hCol
           && sqlite3StrICmp(pCol->zCnName, zCol)==0
          ){
            if( iCol==pTab->iPKey ){
              iCol = -1;
            }
            break;
          }
        }
        if( iCol>=pTab->nCol && sqlite3IsRowid(zCol) && VisibleRowid(pTab) ){

      NameContext *p;
      int i;
      for(i=0, p=pNC; p && i<ArraySize(anRef); p=p->pNext, i++){
        anRef[i] = p->nRef;
      }
      sqlite3WalkExpr(pWalker, pExpr->pLeft);
      if( 0==sqlite3ExprCanBeNull(pExpr->pLeft) && !IN_RENAME_OBJECT ){
        testcase( ExprHasProperty(pExpr, EP_FromJoin) );
        if( pExpr->op==TK_NOTNULL ){
          pExpr->u.zToken = "true";
          ExprSetProperty(pExpr, EP_IsTrue);
        }else{
          pExpr->u.zToken = "false";
          ExprSetProperty(pExpr, EP_IsFalse);
        }

    if( (op==TK_AGG_COLUMN || op==TK_COLUMN || op==TK_TRIGGER)
     && p->y.pTab!=0
    ){
      /* op==TK_REGISTER && p->y.pTab!=0 happens when pExpr was originally
      ** a TK_COLUMN but was previously evaluated and cached in a register */
      int j = p->iColumn;
      if( j>=0 ){
        const char *zColl = sqlite3ColumnColl(&p->y.pTab->aCol[j]);
        pColl = sqlite3FindCollSeq(db, ENC(db), zColl, 0);
      }
      break;
    }
    if( op==TK_CAST || op==TK_UPLUS ){
      p = p->pLeft;
      continue;

  if( p->pWhere ) return 0;              /* Has no WHERE clause */
  pSrc = p->pSrc;
  assert( pSrc!=0 );
  if( pSrc->nSrc!=1 ) return 0;          /* Single term in FROM clause */
  if( pSrc->a[0].pSelect ) return 0;     /* FROM is not a subquery or view */
  pTab = pSrc->a[0].pTab;
  assert( pTab!=0 );
  assert( !IsView(pTab)  );              /* FROM clause is not a view */
  if( IsVirtual(pTab) ) return 0;        /* FROM clause not a virtual table */
  pEList = p->pEList;
  assert( pEList!=0 );
  /* All SELECT results must be columns. */
  for(i=0; i<pEList->nExpr; i++){
    Expr *pRes = pEList->a[i].pExpr;
    if( pRes->op!=TK_COLUMN ) return 0;

#ifndef SQLITE_OMIT_GENERATED_COLUMNS
/*
** Generate code that will compute the value of generated column pCol
** and store the result in register regOut
*/
SQLITE_PRIVATE void sqlite3ExprCodeGeneratedColumn(
  Parse *pParse,     /* Parsing context */
  Table *pTab,       /* Table containing the generated column */
  Column *pCol,      /* The generated column */
  int regOut         /* Put the result in this register */
){
  int iAddr;
  Vdbe *v = pParse->pVdbe;
  assert( v!=0 );
  assert( pParse->iSelfTab!=0 );
  if( pParse->iSelfTab>0 ){
    iAddr = sqlite3VdbeAddOp3(v, OP_IfNullRow, pParse->iSelfTab-1, 0, regOut);
  }else{
    iAddr = 0;
  }
  sqlite3ExprCodeCopy(pParse, sqlite3ColumnExpr(pTab,pCol), regOut);
  if( pCol->affinity>=SQLITE_AFF_TEXT ){
    sqlite3VdbeAddOp4(v, OP_Affinity, regOut, 1, 0, &pCol->affinity, 1);
  }
  if( iAddr ) sqlite3VdbeJumpHere(v, iAddr);
}
#endif /* SQLITE_OMIT_GENERATED_COLUMNS */

    if( IsVirtual(pTab) ){
      op = OP_VColumn;
      x = iCol;
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
    }else if( (pCol = &pTab->aCol[iCol])->colFlags & COLFLAG_VIRTUAL ){
      Parse *pParse = sqlite3VdbeParser(v);
      if( pCol->colFlags & COLFLAG_BUSY ){
        sqlite3ErrorMsg(pParse, "generated column loop on \"%s\"",
                        pCol->zCnName);
      }else{
        int savedSelfTab = pParse->iSelfTab;
        pCol->colFlags |= COLFLAG_BUSY;
        pParse->iSelfTab = iTabCur+1;
        sqlite3ExprCodeGeneratedColumn(pParse, pTab, pCol, regOut);
        pParse->iSelfTab = savedSelfTab;
        pCol->colFlags &= ~COLFLAG_BUSY;
      }
      return;
#endif
    }else if( !HasRowid(pTab) ){
      testcase( iCol!=sqlite3TableColumnToStorage(pTab, iCol) );

      }else if( pAggInfo->useSortingIdx ){
        Table *pTab = pCol->pTab;
        sqlite3VdbeAddOp3(v, OP_Column, pAggInfo->sortingIdxPTab,
                              pCol->iSorterColumn, target);
        if( pCol->iColumn<0 ){
          VdbeComment((v,"%s.rowid",pTab->zName));
        }else{
          VdbeComment((v,"%s.%s",
              pTab->zName, pTab->aCol[pCol->iColumn].zCnName));
          if( pTab->aCol[pCol->iColumn].affinity==SQLITE_AFF_REAL ){
            sqlite3VdbeAddOp1(v, OP_RealAffinity, target);
          }
        }
        return target;
      }
      /* Otherwise, fall thru into the TK_COLUMN case */

          pCol = pTab->aCol + iCol;
          testcase( iCol!=sqlite3TableColumnToStorage(pTab,iCol) );
          iSrc = sqlite3TableColumnToStorage(pTab, iCol) - pParse->iSelfTab;
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
          if( pCol->colFlags & COLFLAG_GENERATED ){
            if( pCol->colFlags & COLFLAG_BUSY ){
              sqlite3ErrorMsg(pParse, "generated column loop on \"%s\"",
                              pCol->zCnName);
              return 0;
            }
            pCol->colFlags |= COLFLAG_BUSY;
            if( pCol->colFlags & COLFLAG_NOTAVAIL ){
              sqlite3ExprCodeGeneratedColumn(pParse, pTab, pCol, iSrc);
            }
            pCol->colFlags &= ~(COLFLAG_BUSY|COLFLAG_NOTAVAIL);
            return iSrc;
          }else
#endif /* SQLITE_OMIT_GENERATED_COLUMNS */
          if( pCol->affinity==SQLITE_AFF_REAL ){
            sqlite3VdbeAddOp2(v, OP_SCopy, iSrc, target);

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

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

#ifndef SQLITE_OMIT_FLOATING_POINT
      /* If the column has REAL affinity, it may currently be stored as an
      ** integer. Use OP_RealAffinity to make sure it is really real.
      **
      ** EVIDENCE-OF: R-60985-57662 SQLite will convert the value back to

      testcase( pExpr->op==TK_NE );
      testcase( pExpr->op==TK_LT );
      testcase( pExpr->op==TK_LE );
      testcase( pExpr->op==TK_GT );
      testcase( pExpr->op==TK_GE );
      /* The y.pTab=0 assignment in wherecode.c always happens after the
      ** impliesNotNullRow() test */
      if( (pLeft->op==TK_COLUMN && pLeft->y.pTab!=0
                               && IsVirtual(pLeft->y.pTab))
       || (pRight->op==TK_COLUMN && pRight->y.pTab!=0
                               && IsVirtual(pRight->y.pTab))
      ){
        return WRC_Prune;
      }
      /* no break */ deliberate_fall_through
    }
    default:

  Table *pTab;              /* Table being renamed */
  char *zName = 0;          /* NULL-terminated version of pName */
  sqlite3 *db = pParse->db; /* Database connection */
  int nTabName;             /* Number of UTF-8 characters in zTabName */
  const char *zTabName;     /* Original name of the table */
  Vdbe *v;
  VTable *pVTab = 0;        /* Non-zero if this is a v-tab with an xRename() */



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

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


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

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

    goto exit_rename_table;
  }
  if( SQLITE_OK!=sqlite3CheckObjectName(pParse,zName,"table",zName) ){
    goto exit_rename_table;
  }

#ifndef SQLITE_OMIT_VIEW
  if( IsView(pTab) ){
    sqlite3ErrorMsg(pParse, "view %s may not be altered", pTab->zName);
    goto exit_rename_table;
  }
#endif

#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Invoke the authorization callback. */

  renameReloadSchema(pParse, iDb, INITFLAG_AlterRename);
  renameTestSchema(pParse, zDb, iDb==1, "after rename", 0);

exit_rename_table:
  sqlite3SrcListDelete(db, pSrc);
  sqlite3DbFree(db, zName);

}

/*
** Write code that will raise an error if the table described by
** zDb and zTab is not empty.
*/
static void sqlite3ErrorIfNotEmpty(

  assert( pNew );

  assert( sqlite3BtreeHoldsAllMutexes(db) );
  iDb = sqlite3SchemaToIndex(db, pNew->pSchema);
  zDb = db->aDb[iDb].zDbSName;
  zTab = &pNew->zName[16];  /* Skip the "sqlite_altertab_" prefix on the name */
  pCol = &pNew->aCol[pNew->nCol-1];
  pDflt = sqlite3ColumnExpr(pNew, pCol);
  pTab = sqlite3FindTable(db, zTab, zDb);
  assert( pTab );

#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Invoke the authorization callback. */
  if( sqlite3AuthCheck(pParse, SQLITE_ALTER_TABLE, zDb, pTab->zName, 0) ){
    return;

    ** literal NULL, then set pDflt to 0. This simplifies checking
    ** for an SQL NULL default below.
    */
    assert( pDflt==0 || pDflt->op==TK_SPAN );
    if( pDflt && pDflt->pLeft->op==TK_NULL ){
      pDflt = 0;
    }
    if( (db->flags&SQLITE_ForeignKeys) && pNew->u.tab.pFKey && pDflt ){
      sqlite3ErrorIfNotEmpty(pParse, zDb, zTab,
          "Cannot add a REFERENCES column with non-NULL default value");
    }
    if( pCol->notNull && !pDflt ){
      sqlite3ErrorIfNotEmpty(pParse, zDb, zTab,
          "Cannot add a NOT NULL column with default value NULL");
    }

  }


  /* Modify the CREATE TABLE statement. */
  zCol = sqlite3DbStrNDup(db, (char*)pColDef->z, pColDef->n);
  if( zCol ){
    char *zEnd = &zCol[pColDef->n-1];

    while( zEnd>zCol && (*zEnd==';' || sqlite3Isspace(*zEnd)) ){
      *zEnd-- = '\0';
    }

    /* substr() operations on characters, but addColOffset is in bytes. So we
    ** have to use printf() to translate between these units: */
    assert( !IsVirtual(pTab) );
    sqlite3NestedParse(pParse,
        "UPDATE \"%w\"." DFLT_SCHEMA_TABLE " SET "
          "sql = printf('%%.%ds, ',sql) || %Q"
          " || substr(sql,1+length(printf('%%.%ds',sql))) "
        "WHERE type = 'table' AND name = %Q",
      zDb, pNew->u.tab.addColOffset, zCol, pNew->u.tab.addColOffset,
      zTab
    );
    sqlite3DbFree(db, zCol);

  }

  v = sqlite3GetVdbe(pParse);
  if( v ){
    /* Make sure the schema version is at least 3.  But do not upgrade
    ** from less than 3 to 4, as that will corrupt any preexisting DESC
    ** index.

  if( IsVirtual(pTab) ){
    sqlite3ErrorMsg(pParse, "virtual tables may not be altered");
    goto exit_begin_add_column;
  }
#endif

  /* Make sure this is not an attempt to ALTER a view. */
  if( IsView(pTab) ){
    sqlite3ErrorMsg(pParse, "Cannot add a column to a view");
    goto exit_begin_add_column;
  }
  if( SQLITE_OK!=isAlterableTable(pParse, pTab) ){
    goto exit_begin_add_column;
  }

  sqlite3MayAbort(pParse);
  assert( pTab->u.tab.addColOffset>0 );
  iDb = sqlite3SchemaToIndex(db, pTab->pSchema);

  /* Put a copy of the Table struct in Parse.pNewTable for the
  ** sqlite3AddColumn() function and friends to modify.  But modify
  ** the name by adding an "sqlite_altertab_" prefix.  By adding this
  ** prefix, we insure that the name will not collide with an existing
  ** table because user table are not allowed to have the "sqlite_"

  if( !pNew->aCol || !pNew->zName ){
    assert( db->mallocFailed );
    goto exit_begin_add_column;
  }
  memcpy(pNew->aCol, pTab->aCol, sizeof(Column)*pNew->nCol);
  for(i=0; i<pNew->nCol; i++){
    Column *pCol = &pNew->aCol[i];
    pCol->zCnName = sqlite3DbStrDup(db, pCol->zCnName);
    pCol->hName = sqlite3StrIHash(pCol->zCnName);


  }
  assert( !IsVirtual(pNew) );
  pNew->u.tab.pDfltList = sqlite3ExprListDup(db, pTab->u.tab.pDfltList, 0);
  pNew->pSchema = db->aDb[iDb].pSchema;
  pNew->u.tab.addColOffset = pTab->u.tab.addColOffset;
  pNew->nTabRef = 1;

exit_begin_add_column:
  sqlite3SrcListDelete(db, pSrc);
  return;
}

/*
** Parameter pTab is the subject of an ALTER TABLE ... RENAME COLUMN
** command. This function checks if the table is a view or virtual
** table (columns of views or virtual tables may not be renamed). If so,
** it loads an error message into pParse and returns non-zero.
**
** Or, if pTab is not a view or virtual table, zero is returned.
*/
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
static int isRealTable(Parse *pParse, Table *pTab, int bDrop){
  const char *zType = 0;
#ifndef SQLITE_OMIT_VIEW
  if( IsView(pTab) ){
    zType = "view";
  }
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( IsVirtual(pTab) ){
    zType = "virtual table";
  }

#endif

  /* Make sure the old name really is a column name in the table to be
  ** altered.  Set iCol to be the index of the column being renamed */
  zOld = sqlite3NameFromToken(db, pOld);
  if( !zOld ) goto exit_rename_column;
  for(iCol=0; iCol<pTab->nCol; iCol++){
    if( 0==sqlite3StrICmp(pTab->aCol[iCol].zCnName, zOld) ) break;
  }
  if( iCol==pTab->nCol ){
    sqlite3ErrorMsg(pParse, "no such column: \"%s\"", zOld);
    goto exit_rename_column;
  }

  /* Ensure the schema contains no double-quoted strings */

  if( iCol<0 ) return;
  sqlite3BtreeEnterAll(db);
  pTab = sqlite3FindTable(db, zTable, zDb);
  if( pTab==0 || iCol>=pTab->nCol ){
    sqlite3BtreeLeaveAll(db);
    return;
  }
  zOld = pTab->aCol[iCol].zCnName;
  memset(&sCtx, 0, sizeof(sCtx));
  sCtx.iCol = ((iCol==pTab->iPKey) ? -1 : iCol);

#ifndef SQLITE_OMIT_AUTHORIZATION
  db->xAuth = 0;
#endif
  rc = renameParseSql(&sParse, zDb, db, zSql, bTemp);

  /* Find tokens that need to be replaced. */
  memset(&sWalker, 0, sizeof(Walker));
  sWalker.pParse = &sParse;
  sWalker.xExprCallback = renameColumnExprCb;
  sWalker.xSelectCallback = renameColumnSelectCb;
  sWalker.u.pRename = &sCtx;

  sCtx.pTab = pTab;
  if( rc!=SQLITE_OK ) goto renameColumnFunc_done;
  if( sParse.pNewTable ){
    if( IsView(sParse.pNewTable) ){
      Select *pSelect = sParse.pNewTable->u.view.pSelect;

      pSelect->selFlags &= ~SF_View;
      sParse.rc = SQLITE_OK;
      sqlite3SelectPrep(&sParse, pSelect, 0);
      rc = (db->mallocFailed ? SQLITE_NOMEM : sParse.rc);
      if( rc==SQLITE_OK ){
        sqlite3WalkSelect(&sWalker, pSelect);
      }
      if( rc!=SQLITE_OK ) goto renameColumnFunc_done;
    }else if( ALWAYS(IsOrdinaryTable(sParse.pNewTable)) ){
      /* A regular table */
      int bFKOnly = sqlite3_stricmp(zTable, sParse.pNewTable->zName);
      FKey *pFKey;

      sCtx.pTab = sParse.pNewTable;
      if( bFKOnly==0 ){
        if( iCol<sParse.pNewTable->nCol ){
          renameTokenFind(
              &sParse, &sCtx, (void*)sParse.pNewTable->aCol[iCol].zCnName
          );
        }
        if( sCtx.iCol<0 ){
          renameTokenFind(&sParse, &sCtx, (void*)&sParse.pNewTable->iPKey);
        }
        sqlite3WalkExprList(&sWalker, sParse.pNewTable->pCheck);
        for(pIdx=sParse.pNewTable->pIndex; pIdx; pIdx=pIdx->pNext){
          sqlite3WalkExprList(&sWalker, pIdx->aColExpr);
        }
        for(pIdx=sParse.pNewIndex; pIdx; pIdx=pIdx->pNext){
          sqlite3WalkExprList(&sWalker, pIdx->aColExpr);
        }
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
        for(i=0; i<sParse.pNewTable->nCol; i++){
          Expr *pExpr = sqlite3ColumnExpr(sParse.pNewTable,
                                                  &sParse.pNewTable->aCol[i]);
          sqlite3WalkExpr(&sWalker, pExpr);
        }
#endif
      }

      assert( !IsVirtual(sParse.pNewTable) );
      for(pFKey=sParse.pNewTable->u.tab.pFKey; pFKey; pFKey=pFKey->pNextFrom){
        for(i=0; i<pFKey->nCol; i++){
          if( bFKOnly==0 && pFKey->aCol[i].iFrom==iCol ){
            renameTokenFind(&sParse, &sCtx, (void*)&pFKey->aCol[i]);
          }
          if( 0==sqlite3_stricmp(pFKey->zTo, zTable)
           && 0==sqlite3_stricmp(pFKey->aCol[i].zCol, zOld)
          ){

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

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

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

            assert( pSelect->selFlags & SF_View );
            pSelect->selFlags &= ~SF_View;
            sqlite3SelectPrep(&sParse, pTab->u.view.pSelect, &sNC);
            if( sParse.nErr ){
              rc = sParse.rc;
            }else{
              sqlite3WalkSelect(&sWalker, pTab->u.view.pSelect);
            }
          }
        }else{
          /* Modify any FK definitions to point to the new table. */
#ifndef SQLITE_OMIT_FOREIGN_KEY
          if( (isLegacy==0 || (db->flags & SQLITE_ForeignKeys))
           && !IsVirtual(pTab)
          ){
            FKey *pFKey;
            assert( !IsVirtual(pTab) );
            for(pFKey=pTab->u.tab.pFKey; pFKey; pFKey=pFKey->pNextFrom){
              if( sqlite3_stricmp(pFKey->zTo, zOld)==0 ){
                renameTokenFind(&sParse, &sCtx, (void*)pFKey->zTo);
              }
            }
          }
#endif

      memset(&sWalker, 0, sizeof(Walker));
      sWalker.pParse = &sParse;
      sWalker.xExprCallback = renameQuotefixExprCb;
      sWalker.xSelectCallback = renameColumnSelectCb;
      sWalker.u.pRename = &sCtx;

      if( sParse.pNewTable ){
        if( IsView(sParse.pNewTable) ){
          Select *pSelect = sParse.pNewTable->u.view.pSelect;

          pSelect->selFlags &= ~SF_View;
          sParse.rc = SQLITE_OK;
          sqlite3SelectPrep(&sParse, pSelect, 0);
          rc = (db->mallocFailed ? SQLITE_NOMEM : sParse.rc);
          if( rc==SQLITE_OK ){
            sqlite3WalkSelect(&sWalker, pSelect);
          }
        }else{
          int i;
          sqlite3WalkExprList(&sWalker, sParse.pNewTable->pCheck);
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
          for(i=0; i<sParse.pNewTable->nCol; i++){
            sqlite3WalkExpr(&sWalker,
               sqlite3ColumnExpr(sParse.pNewTable,
                                         &sParse.pNewTable->aCol[i]));
          }
#endif /* SQLITE_OMIT_GENERATED_COLUMNS */
        }
      }else if( sParse.pNewIndex ){
        sqlite3WalkExprList(&sWalker, sParse.pNewIndex->aColExpr);
        sqlite3WalkExpr(&sWalker, sParse.pNewIndex->pPartIdxWhere);
      }else{

    int rc;
    Parse sParse;
    int flags = db->flags;
    if( bNoDQS ) db->flags &= ~(SQLITE_DqsDML|SQLITE_DqsDDL);
    rc = renameParseSql(&sParse, zDb, db, zInput, bTemp);
    db->flags |= (flags & (SQLITE_DqsDML|SQLITE_DqsDDL));
    if( rc==SQLITE_OK ){
      if( isLegacy==0 && sParse.pNewTable && IsView(sParse.pNewTable) ){
        NameContext sNC;
        memset(&sNC, 0, sizeof(sNC));
        sNC.pParse = &sParse;
        sqlite3SelectPrep(&sParse, sParse.pNewTable->u.view.pSelect, &sNC);
        if( sParse.nErr ) rc = sParse.rc;
      }

      else if( sParse.pNewTrigger ){
        if( isLegacy==0 ){
          rc = renameResolveTrigger(&sParse);
        }

  pTab = sParse.pNewTable;
  if( pTab==0 || pTab->nCol==1 || iCol>=pTab->nCol ){
    /* This can happen if the sqlite_schema table is corrupt */
    rc = SQLITE_CORRUPT_BKPT;
    goto drop_column_done;
  }

  pCol = renameTokenFind(&sParse, 0, (void*)pTab->aCol[iCol].zCnName);
  if( iCol<pTab->nCol-1 ){
    RenameToken *pEnd;
    pEnd = renameTokenFind(&sParse, 0, (void*)pTab->aCol[iCol+1].zCnName);
    zEnd = (const char*)pEnd->t.z;
  }else{
    assert( !IsVirtual(pTab) );
    zEnd = (const char*)&zSql[pTab->u.tab.addColOffset];
    while( ALWAYS(pCol->t.z[0]!=0) && pCol->t.z[0]!=',' ) pCol->t.z--;
  }

  zNew = sqlite3MPrintf(db, "%.*s%s", pCol->t.z-zSql, zSql, zEnd);
  sqlite3_result_text(context, zNew, -1, SQLITE_TRANSIENT);
  sqlite3_free(zNew);

        if( i==pTab->iPKey ){
          sqlite3VdbeAddOp2(v, OP_Null, 0, regOut);
        }else{
          sqlite3ExprCodeGetColumnOfTable(v, pTab, iCur, i, regOut);
        }
        nField++;
      }
    }
    if( nField==0 ){
      /* dbsqlfuzz 5f09e7bcc78b4954d06bf9f2400d7715f48d1fef */
      pParse->nMem++;
      sqlite3VdbeAddOp2(v, OP_Null, 0, reg+1);
      nField = 1;
    }
    sqlite3VdbeAddOp3(v, OP_MakeRecord, reg+1, nField, regRec);
    if( pPk ){
      sqlite3VdbeAddOp4Int(v, OP_IdxInsert, iCur, regRec, reg+1, pPk->nKeyCol);
    }else{
      sqlite3VdbeAddOp3(v, OP_Insert, iCur, regRec, reg);
    }

  assert( k>=0 && k<pIdx->nColumn );
  i = pIdx->aiColumn[k];
  if( NEVER(i==XN_ROWID) ){
    VdbeComment((v,"%s.rowid",pIdx->zName));
  }else if( i==XN_EXPR ){
    VdbeComment((v,"%s.expr(%d)",pIdx->zName, k));
  }else{
    VdbeComment((v,"%s.%s", pIdx->zName, pIdx->pTable->aCol[i].zCnName));
  }
}
#else
# define analyzeVdbeCommentIndexWithColumnName(a,b,c)
#endif /* SQLITE_DEBUG */

/*

    }
  }
  iCol = pExpr->iColumn;
  if( pTab==0 ) return;

  if( iCol>=0 ){
    assert( iCol<pTab->nCol );
    zCol = pTab->aCol[iCol].zCnName;
  }else if( pTab->iPKey>=0 ){
    assert( pTab->iPKey<pTab->nCol );
    zCol = pTab->aCol[pTab->iPKey].zCnName;
  }else{
    zCol = "ROWID";
  }
  assert( iDb>=0 && iDb<pParse->db->nDb );
  if( SQLITE_IGNORE==sqlite3AuthReadCol(pParse, pTab->zName, zCol, iDb) ){
    pExpr->op = TK_NULL;
  }

    pParse->rc = SQLITE_ERROR;
  }
}

/*
** Run the parser and code generator recursively in order to generate
** code for the SQL statement given onto the end of the pParse context
** currently under construction.  Notes:
**
**   *  The final OP_Halt is not appended and other initialization
**      and finalization steps are omitted because those are handling by the
**      outermost parser.
**

**   *  Built-in SQL functions always take precedence over application-defined
**      SQL functions.  In other words, it is not possible to override a
**      built-in function.
*/
SQLITE_PRIVATE void sqlite3NestedParse(Parse *pParse, const char *zFormat, ...){
  va_list ap;
  char *zSql;
  char *zErrMsg = 0;
  sqlite3 *db = pParse->db;
  u32 savedDbFlags = db->mDbFlags;
  char saveBuf[PARSE_TAIL_SZ];

  if( pParse->nErr ) return;
  assert( pParse->nested<10 );  /* Nesting should only be of limited depth */
  va_start(ap, zFormat);
  zSql = sqlite3VMPrintf(db, zFormat, ap);
  va_end(ap);
  if( zSql==0 ){
    /* This can result either from an OOM or because the formatted string
    ** exceeds SQLITE_LIMIT_LENGTH.  In the latter case, we need to set
    ** an error */
    if( !db->mallocFailed ) pParse->rc = SQLITE_TOOBIG;
    pParse->nErr++;
    return;
  }
  pParse->nested++;
  memcpy(saveBuf, PARSE_TAIL(pParse), PARSE_TAIL_SZ);
  memset(PARSE_TAIL(pParse), 0, PARSE_TAIL_SZ);
  db->mDbFlags |= DBFLAG_PreferBuiltin;
  sqlite3RunParser(pParse, zSql, &zErrMsg);
  db->mDbFlags = savedDbFlags;
  sqlite3DbFree(db, zErrMsg);
  sqlite3DbFree(db, zSql);
  memcpy(PARSE_TAIL(pParse), saveBuf, PARSE_TAIL_SZ);
  pParse->nested--;
}

#if SQLITE_USER_AUTHENTICATION

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

/*
** Set the expression associated with a column.  This is usually
** the DEFAULT value, but might also be the expression that computes
** the value for a generated column.
*/
SQLITE_PRIVATE void sqlite3ColumnSetExpr(
  Parse *pParse,    /* Parsing context */
  Table *pTab,      /* The table containing the column */
  Column *pCol,     /* The column to receive the new DEFAULT expression */
  Expr *pExpr       /* The new default expression */
){
  ExprList *pList;
  assert( !IsVirtual(pTab) );
  pList = pTab->u.tab.pDfltList;
  if( pCol->iDflt==0
   || NEVER(pList==0)
   || NEVER(pList->nExpr<pCol->iDflt)
  ){
    pCol->iDflt = pList==0 ? 1 : pList->nExpr+1;
    pTab->u.tab.pDfltList = sqlite3ExprListAppend(pParse, pList, pExpr);
  }else{
    sqlite3ExprDelete(pParse->db, pList->a[pCol->iDflt-1].pExpr);
    pList->a[pCol->iDflt-1].pExpr = pExpr;
  }
}

/*
** Return the expression associated with a column.  The expression might be
** the DEFAULT clause or the AS clause of a generated column.
** Return NULL if the column has no associated expression.
*/
SQLITE_PRIVATE Expr *sqlite3ColumnExpr(Table *pTab, Column *pCol){
  if( pCol->iDflt==0 ) return 0;
  if( NEVER(IsVirtual(pTab)) ) return 0;
  if( NEVER(pTab->u.tab.pDfltList==0) ) return 0;
  if( NEVER(pTab->u.tab.pDfltList->nExpr<pCol->iDflt) ) return 0;
  return pTab->u.tab.pDfltList->a[pCol->iDflt-1].pExpr;
}

/*
** Set the collating sequence name for a column.
*/
SQLITE_PRIVATE void sqlite3ColumnSetColl(
  sqlite3 *db,
  Column *pCol,
  const char *zColl
){
  int nColl;
  int n;
  char *zNew;
  assert( zColl!=0 );
  n = sqlite3Strlen30(pCol->zCnName) + 1;
  if( pCol->colFlags & COLFLAG_HASTYPE ){
    n += sqlite3Strlen30(pCol->zCnName+n) + 1;
  }
  nColl = sqlite3Strlen30(zColl) + 1;
  zNew = sqlite3DbRealloc(db, pCol->zCnName, nColl+n);
  if( zNew ){
    pCol->zCnName = zNew;
    memcpy(pCol->zCnName + n, zColl, nColl);
    pCol->colFlags |= COLFLAG_HASCOLL;
  }
}

/*
** Return the collating squence name for a column
*/
SQLITE_PRIVATE const char *sqlite3ColumnColl(Column *pCol){
  const char *z;
  if( (pCol->colFlags & COLFLAG_HASCOLL)==0 ) return 0;
  z = pCol->zCnName;
  while( *z ){ z++; }
  if( pCol->colFlags & COLFLAG_HASTYPE ){
    do{ z++; }while( *z );
  }
  return z+1;
}

/*
** Delete memory allocated for the column names of a table or view (the
** Table.aCol[] array).
*/
SQLITE_PRIVATE void sqlite3DeleteColumnNames(sqlite3 *db, Table *pTable){
  int i;
  Column *pCol;
  assert( pTable!=0 );
  if( (pCol = pTable->aCol)!=0 ){
    for(i=0; i<pTable->nCol; i++, pCol++){
      assert( pCol->zCnName==0 || pCol->hName==sqlite3StrIHash(pCol->zCnName) );
      sqlite3DbFree(db, pCol->zCnName);

    }
    sqlite3DbFree(db, pTable->aCol);
    if( !IsVirtual(pTable) ){
      sqlite3ExprListDelete(db, pTable->u.tab.pDfltList);
    }
    if( db==0 || db->pnBytesFreed==0 ){
      pTable->aCol = 0;
      pTable->nCol = 0;
      if( !IsVirtual(pTable) ){
        pTable->u.tab.pDfltList = 0;
      }
    }
  }
}

/*
** Remove the memory data structures associated with the given
** Table.  No changes are made to disk by this routine.
**

      );
      assert( db==0 || sqlite3SchemaMutexHeld(db, 0, pIndex->pSchema) );
      assert( pOld==pIndex || pOld==0 );
    }
    sqlite3FreeIndex(db, pIndex);
  }

  if( IsOrdinaryTable(pTable) ){
    sqlite3FkDelete(db, pTable);
  }
#ifndef SQLITE_OMIT_VIRTUAL_TABLE
  else if( IsVirtual(pTable) ){
    sqlite3VtabClear(db, pTable);
  }
#endif
  else{
    assert( IsView(pTable) );
    sqlite3SelectDelete(db, pTable->u.view.pSelect);
  }

  /* Delete the Table structure itself.
  */
  sqlite3DeleteColumnNames(db, pTable);
  sqlite3DbFree(db, pTable->zName);
  sqlite3DbFree(db, pTable->zColAff);

  sqlite3ExprListDelete(db, pTable->pCheck);



  sqlite3DbFree(db, pTable);

  /* Verify that no lookaside memory was used by schema tables */
  assert( nLookaside==0 || nLookaside==sqlite3LookasideUsed(db,0) );
}
SQLITE_PRIVATE void sqlite3DeleteTable(sqlite3 *db, Table *pTable){
  /* Do not delete the table until the reference count reaches zero. */

  }

  /* Normal (non-error) return. */
  return;

  /* If an error occurs, we jump here */
begin_table_error:
  pParse->checkSchema = 1;
  sqlite3DbFree(db, zName);
  return;
}

/* Set properties of a table column based on the (magical)
** name of the column.
*/
#if SQLITE_ENABLE_HIDDEN_COLUMNS
SQLITE_PRIVATE void sqlite3ColumnPropertiesFromName(Table *pTab, Column *pCol){
  if( sqlite3_strnicmp(pCol->zCnName, "__hidden__", 10)==0 ){
    pCol->colFlags |= COLFLAG_HIDDEN;
    if( pTab ) pTab->tabFlags |= TF_HasHidden;
  }else if( pTab && pCol!=pTab->aCol && (pCol[-1].colFlags & COLFLAG_HIDDEN) ){
    pTab->tabFlags |= TF_OOOHidden;
  }
}
#endif

** Add a new column to the table currently being constructed.
**
** The parser calls this routine once for each column declaration
** in a CREATE TABLE statement.  sqlite3StartTable() gets called
** first to get things going.  Then this routine is called for each
** column.
*/
SQLITE_PRIVATE void sqlite3AddColumn(Parse *pParse, Token sName, Token sType){
  Table *p;
  int i;
  char *z;
  char *zType;
  Column *pCol;
  sqlite3 *db = pParse->db;
  u8 hName;
  Column *aNew;
  u8 eType = COLTYPE_CUSTOM;
  u8 szEst = 1;
  char affinity = SQLITE_AFF_BLOB;

  if( (p = pParse->pNewTable)==0 ) return;
  if( p->nCol+1>db->aLimit[SQLITE_LIMIT_COLUMN] ){
    sqlite3ErrorMsg(pParse, "too many columns on %s", p->zName);
    return;
  }
  if( !IN_RENAME_OBJECT ) sqlite3DequoteToken(&sName);

  /* Because keywords GENERATE ALWAYS can be converted into indentifiers
  ** by the parser, we can sometimes end up with a typename that ends
  ** with "generated always".  Check for this case and omit the surplus
  ** text. */
  if( sType.n>=16
   && sqlite3_strnicmp(sType.z+(sType.n-6),"always",6)==0
  ){
    sType.n -= 6;
    while( ALWAYS(sType.n>0) && sqlite3Isspace(sType.z[sType.n-1]) ) sType.n--;
    if( sType.n>=9
     && sqlite3_strnicmp(sType.z+(sType.n-9),"generated",9)==0
    ){
      sType.n -= 9;
      while( sType.n>0 && sqlite3Isspace(sType.z[sType.n-1]) ) sType.n--;
    }
  }

  /* Check for standard typenames.  For standard typenames we will
  ** set the Column.eType field rather than storing the typename after
  ** the column name, in order to save space. */
  if( sType.n>=3 ){
    sqlite3DequoteToken(&sType);
    for(i=0; i<SQLITE_N_STDTYPE; i++){
       if( sType.n==sqlite3StdTypeLen[i]
        && sqlite3_strnicmp(sType.z, sqlite3StdType[i], sType.n)==0
       ){
         sType.n = 0;
         eType = i+1;
         affinity = sqlite3StdTypeAffinity[i];
         if( affinity<=SQLITE_AFF_TEXT ) szEst = 5;
         break;
       }
    }
  }

  z = sqlite3DbMallocRaw(db, sName.n + 1 + sType.n + (sType.n>0) );
  if( z==0 ) return;
  if( IN_RENAME_OBJECT ) sqlite3RenameTokenMap(pParse, (void*)z, &sName);
  memcpy(z, sName.z, sName.n);
  z[sName.n] = 0;
  sqlite3Dequote(z);
  hName = sqlite3StrIHash(z);
  for(i=0; i<p->nCol; i++){
    if( p->aCol[i].hName==hName && sqlite3StrICmp(z, p->aCol[i].zCnName)==0 ){
      sqlite3ErrorMsg(pParse, "duplicate column name: %s", z);
      sqlite3DbFree(db, z);
      return;
    }
  }


  aNew = sqlite3DbRealloc(db,p->aCol,(p->nCol+1)*sizeof(p->aCol[0]));
  if( aNew==0 ){
    sqlite3DbFree(db, z);
    return;
  }
  p->aCol = aNew;

  pCol = &p->aCol[p->nCol];
  memset(pCol, 0, sizeof(p->aCol[0]));
  pCol->zCnName = z;
  pCol->hName = hName;
  sqlite3ColumnPropertiesFromName(p, pCol);

  if( sType.n==0 ){
    /* If there is no type specified, columns have the default affinity
    ** 'BLOB' with a default size of 4 bytes. */
    pCol->affinity = affinity;
    pCol->eType = eType;
    pCol->szEst = szEst;
#ifdef SQLITE_ENABLE_SORTER_REFERENCES
    if( affinity==SQLITE_AFF_BLOB ){
      if( 4>=sqlite3GlobalConfig.szSorterRef ){
        pCol->colFlags |= COLFLAG_SORTERREF;
      }
    }
#endif
  }else{
    zType = z + sqlite3Strlen30(z) + 1;
    memcpy(zType, sType.z, sType.n);
    zType[sType.n] = 0;
    sqlite3Dequote(zType);
    pCol->affinity = sqlite3AffinityType(zType, pCol);
    pCol->colFlags |= COLFLAG_HASTYPE;
  }
  p->nCol++;
  p->nNVCol++;
  pParse->constraintName.n = 0;

  sqlite3 *db = pParse->db;
  p = pParse->pNewTable;
  if( p!=0 ){
    int isInit = db->init.busy && db->init.iDb!=1;
    pCol = &(p->aCol[p->nCol-1]);
    if( !sqlite3ExprIsConstantOrFunction(pExpr, isInit) ){
      sqlite3ErrorMsg(pParse, "default value of column [%s] is not constant",
          pCol->zCnName);
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
    }else if( pCol->colFlags & COLFLAG_GENERATED ){
      testcase( pCol->colFlags & COLFLAG_VIRTUAL );
      testcase( pCol->colFlags & COLFLAG_STORED );
      sqlite3ErrorMsg(pParse, "cannot use DEFAULT on a generated column");
#endif
    }else{
      /* A copy of pExpr is used instead of the original, as pExpr contains
      ** tokens that point to volatile memory.
      */
      Expr x, *pDfltExpr;

      memset(&x, 0, sizeof(x));
      x.op = TK_SPAN;
      x.u.zToken = sqlite3DbSpanDup(db, zStart, zEnd);
      x.pLeft = pExpr;
      x.flags = EP_Skip;
      pDfltExpr = sqlite3ExprDup(db, &x, EXPRDUP_REDUCE);
      sqlite3DbFree(db, x.u.zToken);
      sqlite3ColumnSetExpr(pParse, p, pCol, pDfltExpr);
    }
  }
  if( IN_RENAME_OBJECT ){
    sqlite3RenameExprUnmap(pParse, pExpr);
  }
  sqlite3ExprDelete(db, pExpr);
}

    for(i=0; i<nTerm; i++){
      Expr *pCExpr = sqlite3ExprSkipCollate(pList->a[i].pExpr);
      assert( pCExpr!=0 );
      sqlite3StringToId(pCExpr);
      if( pCExpr->op==TK_ID ){
        const char *zCName = pCExpr->u.zToken;
        for(iCol=0; iCol<pTab->nCol; iCol++){
          if( sqlite3StrICmp(zCName, pTab->aCol[iCol].zCnName)==0 ){
            pCol = &pTab->aCol[iCol];
            makeColumnPartOfPrimaryKey(pParse, pCol);
            break;
          }
        }
      }
    }
  }
  if( nTerm==1
   && pCol
   && pCol->eType==COLTYPE_INTEGER
   && sortOrder!=SQLITE_SO_DESC
  ){
    if( IN_RENAME_OBJECT && pList ){
      Expr *pCExpr = sqlite3ExprSkipCollate(pList->a[0].pExpr);
      sqlite3RenameTokenRemap(pParse, &pTab->iPKey, pCExpr);
    }
    pTab->iPKey = iCol;

  i = p->nCol-1;
  db = pParse->db;
  zColl = sqlite3NameFromToken(db, pToken);
  if( !zColl ) return;

  if( sqlite3LocateCollSeq(pParse, zColl) ){
    Index *pIdx;

    sqlite3ColumnSetColl(db, &p->aCol[i], zColl);

    /* If the column is declared as "<name> PRIMARY KEY COLLATE <type>",
    ** then an index may have been created on this column before the
    ** collation type was added. Correct this if it is the case.
    */
    for(pIdx=p->pIndex; pIdx; pIdx=pIdx->pNext){
      assert( pIdx->nKeyCol==1 );
      if( pIdx->aiColumn[0]==i ){
        pIdx->azColl[0] = sqlite3ColumnColl(&p->aCol[i]);
      }
    }


  }
  sqlite3DbFree(db, zColl);
}

/* Change the most recently parsed column to be a GENERATED ALWAYS AS
** column.
*/
SQLITE_PRIVATE void sqlite3AddGenerated(Parse *pParse, Expr *pExpr, Token *pType){
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
  u8 eType = COLFLAG_VIRTUAL;
  Table *pTab = pParse->pNewTable;
  Column *pCol;
  if( pTab==0 ){
    /* generated column in an CREATE TABLE IF NOT EXISTS that already exists */
    goto generated_done;
  }
  pCol = &(pTab->aCol[pTab->nCol-1]);
  if( IN_DECLARE_VTAB ){
    sqlite3ErrorMsg(pParse, "virtual tables cannot use computed columns");
    goto generated_done;
  }
  if( pCol->iDflt>0 ) goto generated_error;
  if( pType ){
    if( pType->n==7 && sqlite3StrNICmp("virtual",pType->z,7)==0 ){
      /* no-op */
    }else if( pType->n==6 && sqlite3StrNICmp("stored",pType->z,6)==0 ){
      eType = COLFLAG_STORED;
    }else{
      goto generated_error;
    }
  }
  if( eType==COLFLAG_VIRTUAL ) pTab->nNVCol--;
  pCol->colFlags |= eType;
  assert( TF_HasVirtual==COLFLAG_VIRTUAL );
  assert( TF_HasStored==COLFLAG_STORED );
  pTab->tabFlags |= eType;
  if( pCol->colFlags & COLFLAG_PRIMKEY ){
    makeColumnPartOfPrimaryKey(pParse, pCol); /* For the error message */
  }
  sqlite3ColumnSetExpr(pParse, pTab, pCol, pExpr);
  pExpr = 0;
  goto generated_done;

generated_error:
  sqlite3ErrorMsg(pParse, "error in generated column \"%s\"",
                  pCol->zCnName);
generated_done:
  sqlite3ExprDelete(pParse->db, pExpr);
#else
  /* Throw and error for the GENERATED ALWAYS AS clause if the
  ** SQLITE_OMIT_GENERATED_COLUMNS compile-time option is used. */
  sqlite3ErrorMsg(pParse, "generated columns not supported");
  sqlite3ExprDelete(pParse->db, pExpr);

static char *createTableStmt(sqlite3 *db, Table *p){
  int i, k, n;
  char *zStmt;
  char *zSep, *zSep2, *zEnd;
  Column *pCol;
  n = 0;
  for(pCol = p->aCol, i=0; i<p->nCol; i++, pCol++){
    n += identLength(pCol->zCnName) + 5;
  }
  n += identLength(p->zName);
  if( n<50 ){
    zSep = "";
    zSep2 = ",";
    zEnd = ")";
  }else{

    };
    int len;
    const char *zType;

    sqlite3_snprintf(n-k, &zStmt[k], zSep);
    k += sqlite3Strlen30(&zStmt[k]);
    zSep = zSep2;
    identPut(zStmt, &k, pCol->zCnName);
    assert( pCol->affinity-SQLITE_AFF_BLOB >= 0 );
    assert( pCol->affinity-SQLITE_AFF_BLOB < ArraySize(azType) );
    testcase( pCol->affinity==SQLITE_AFF_BLOB );
    testcase( pCol->affinity==SQLITE_AFF_TEXT );
    testcase( pCol->affinity==SQLITE_AFF_NUMERIC );
    testcase( pCol->affinity==SQLITE_AFF_INTEGER );
    testcase( pCol->affinity==SQLITE_AFF_REAL );

  /* Locate the PRIMARY KEY index.  Or, if this table was originally
  ** an INTEGER PRIMARY KEY table, create a new PRIMARY KEY index.
  */
  if( pTab->iPKey>=0 ){
    ExprList *pList;
    Token ipkToken;
    sqlite3TokenInit(&ipkToken, pTab->aCol[pTab->iPKey].zCnName);
    pList = sqlite3ExprListAppend(pParse, 0,
                  sqlite3ExprAlloc(db, TK_ID, &ipkToken, 0));
    if( pList==0 ){
      pTab->tabFlags &= ~TF_WithoutRowid;
      return;
    }
    if( IN_RENAME_OBJECT ){

  int nName;                    /* Length of zName */
  Module *pMod;                 /* Module for the virtual table */

  if( !IsVirtual(pTab) ) return 0;
  nName = sqlite3Strlen30(pTab->zName);
  if( sqlite3_strnicmp(zName, pTab->zName, nName)!=0 ) return 0;
  if( zName[nName]!='_' ) return 0;
  pMod = (Module*)sqlite3HashFind(&db->aModule, pTab->u.vtab.azArg[0]);
  if( pMod==0 ) return 0;
  if( pMod->pModule->iVersion<3 ) return 0;
  if( pMod->pModule->xShadowName==0 ) return 0;
  return pMod->pModule->xShadowName(zName+nName+1);
}
#endif /* ifndef SQLITE_OMIT_VIRTUALTABLE */

  if( p->tabFlags & TF_HasGenerated ){
    int ii, nNG = 0;
    testcase( p->tabFlags & TF_HasVirtual );
    testcase( p->tabFlags & TF_HasStored );
    for(ii=0; ii<p->nCol; ii++){
      u32 colFlags = p->aCol[ii].colFlags;
      if( (colFlags & COLFLAG_GENERATED)!=0 ){
        Expr *pX = sqlite3ColumnExpr(p, &p->aCol[ii]);
        testcase( colFlags & COLFLAG_VIRTUAL );
        testcase( colFlags & COLFLAG_STORED );
        if( sqlite3ResolveSelfReference(pParse, p, NC_GenCol, pX, 0) ){
          /* If there are errors in resolving the expression, change the
          ** expression to a NULL.  This prevents code generators that operate
          ** on the expression from inserting extra parts into the expression
          ** tree that have been allocated from lookaside memory, which is
          ** illegal in a schema and will lead to errors or heap corruption
          ** when the database connection closes. */
          sqlite3ColumnSetExpr(pParse, p, &p->aCol[ii],
               sqlite3ExprAlloc(db, TK_NULL, 0, 0));
        }
      }else{
        nNG++;
      }
    }
    if( nNG==0 ){
      sqlite3ErrorMsg(pParse, "must have at least one non-generated column");

    if( NEVER(v==0) ) return;

    sqlite3VdbeAddOp1(v, OP_Close, 0);

    /*
    ** Initialize zType for the new view or table.
    */
    if( IsOrdinaryTable(p) ){
      /* A regular table */
      zType = "table";
      zType2 = "TABLE";
#ifndef SQLITE_OMIT_VIEW
    }else{
      /* A view */
      zType = "view";

      assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
      p->pSchema->pSeqTab = p;
    }
#endif
  }

#ifndef SQLITE_OMIT_ALTERTABLE
  if( !pSelect && IsOrdinaryTable(p) ){
    assert( pCons && pEnd );
    if( pCons->z==0 ){
      pCons = pEnd;
    }
    p->u.tab.addColOffset = 13 + (int)(pCons->z - pParse->sNameToken.z);
  }
#endif
}

#ifndef SQLITE_OMIT_VIEW
/*
** The parser calls this routine in order to create a new VIEW

  /* Make a copy of the entire SELECT statement that defines the view.
  ** This will force all the Expr.token.z values to be dynamically
  ** allocated rather than point to the input string - which means that
  ** they will persist after the current sqlite3_exec() call returns.
  */
  pSelect->selFlags |= SF_View;
  if( IN_RENAME_OBJECT ){
    p->u.view.pSelect = pSelect;
    pSelect = 0;
  }else{
    p->u.view.pSelect = sqlite3SelectDup(db, pSelect, EXPRDUP_REDUCE);
  }
  p->pCheck = sqlite3ExprListDup(db, pCNames, EXPRDUP_REDUCE);
  p->eTabType = TABTYP_VIEW;
  if( db->mallocFailed ) goto create_view_fail;

  /* Locate the end of the CREATE VIEW statement.  Make sEnd point to
  ** the end.
  */
  sEnd = pParse->sLastToken;
  assert( sEnd.z[0]!=0 || sEnd.n==0 );

  /* If we get this far, it means we need to compute the table names.
  ** Note that the call to sqlite3ResultSetOfSelect() will expand any
  ** "*" elements in the results set of the view and will assign cursors
  ** to the elements of the FROM clause.  But we do not want these changes
  ** to be permanent.  So the computation is done on a copy of the SELECT
  ** statement that defines the view.
  */
  assert( IsView(pTable) );
  pSel = sqlite3SelectDup(db, pTable->u.view.pSelect, 0);
  if( pSel ){
    u8 eParseMode = pParse->eParseMode;
    pParse->eParseMode = PARSE_MODE_NORMAL;
    n = pParse->nTab;
    sqlite3SrcListAssignCursors(pParse, pSel->pSrc);
    pTable->nCol = -1;
    DisableLookaside;

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


  }
#endif /* SQLITE_OMIT_VIEW */
  return nErr;
}
#endif /* !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE) */

#ifndef SQLITE_OMIT_VIEW
/*
** Clear the column names from every VIEW in database idx.
*/
static void sqliteViewResetAll(sqlite3 *db, int idx){
  HashElem *i;
  assert( sqlite3SchemaMutexHeld(db, idx, 0) );
  if( !DbHasProperty(db, idx, DB_UnresetViews) ) return;
  for(i=sqliteHashFirst(&db->aDb[idx].pSchema->tblHash); i;i=sqliteHashNext(i)){
    Table *pTab = sqliteHashData(i);
    if( IsView(pTab) ){
      sqlite3DeleteColumnNames(db, pTab);


    }
  }
  DbClearProperty(db, idx, DB_UnresetViews);
}
#else
# define sqliteViewResetAll(A,B)
#endif /* SQLITE_OMIT_VIEW */

    goto exit_drop_table;
  }

#ifndef SQLITE_OMIT_VIEW
  /* Ensure DROP TABLE is not used on a view, and DROP VIEW is not used
  ** on a table.
  */
  if( isView && !IsView(pTab) ){
    sqlite3ErrorMsg(pParse, "use DROP TABLE to delete table %s", pTab->zName);
    goto exit_drop_table;
  }
  if( !isView && IsView(pTab) ){
    sqlite3ErrorMsg(pParse, "use DROP VIEW to delete view %s", pTab->zName);
    goto exit_drop_table;
  }
#endif

  /* Generate code to remove the table from the schema table
  ** on disk.

  if( p==0 || IN_DECLARE_VTAB ) goto fk_end;
  if( pFromCol==0 ){
    int iCol = p->nCol-1;
    if( NEVER(iCol<0) ) goto fk_end;
    if( pToCol && pToCol->nExpr!=1 ){
      sqlite3ErrorMsg(pParse, "foreign key on %s"
         " should reference only one column of table %T",
         p->aCol[iCol].zCnName, pTo);
      goto fk_end;
    }
    nCol = 1;
  }else if( pToCol && pToCol->nExpr!=pFromCol->nExpr ){
    sqlite3ErrorMsg(pParse,
        "number of columns in foreign key does not match the number of "
        "columns in the referenced table");

    }
  }
  pFKey = sqlite3DbMallocZero(db, nByte );
  if( pFKey==0 ){
    goto fk_end;
  }
  pFKey->pFrom = p;
  pFKey->pNextFrom = p->u.tab.pFKey;
  z = (char*)&pFKey->aCol[nCol];
  pFKey->zTo = z;
  if( IN_RENAME_OBJECT ){
    sqlite3RenameTokenMap(pParse, (void*)z, pTo);
  }
  memcpy(z, pTo->z, pTo->n);
  z[pTo->n] = 0;
  sqlite3Dequote(z);
  z += pTo->n+1;
  pFKey->nCol = nCol;
  if( pFromCol==0 ){
    pFKey->aCol[0].iFrom = p->nCol-1;
  }else{
    for(i=0; i<nCol; i++){
      int j;
      for(j=0; j<p->nCol; j++){
        if( sqlite3StrICmp(p->aCol[j].zCnName, pFromCol->a[i].zEName)==0 ){
          pFKey->aCol[i].iFrom = j;
          break;
        }
      }
      if( j>=p->nCol ){
        sqlite3ErrorMsg(pParse,
          "unknown column \"%s\" in foreign key definition",

    assert( pNextTo->pPrevTo==0 );
    pFKey->pNextTo = pNextTo;
    pNextTo->pPrevTo = pFKey;
  }

  /* Link the foreign key to the table as the last step.
  */
  assert( !IsVirtual(p) );
  p->u.tab.pFKey = pFKey;
  pFKey = 0;

fk_end:
  sqlite3DbFree(db, pFKey);
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */
  sqlite3ExprListDelete(db, pFromCol);
  sqlite3ExprListDelete(db, pToCol);
}

/*
** This routine is called when an INITIALLY IMMEDIATE or INITIALLY DEFERRED
** clause is seen as part of a foreign key definition.  The isDeferred
** parameter is 1 for INITIALLY DEFERRED and 0 for INITIALLY IMMEDIATE.
** The behavior of the most recently created foreign key is adjusted
** accordingly.
*/
SQLITE_PRIVATE void sqlite3DeferForeignKey(Parse *pParse, int isDeferred){
#ifndef SQLITE_OMIT_FOREIGN_KEY
  Table *pTab;
  FKey *pFKey;
  if( (pTab = pParse->pNewTable)==0 ) return;
  if( NEVER(IsVirtual(pTab)) ) return;
  if( (pFKey = pTab->u.tab.pFKey)==0 ) return;
  assert( isDeferred==0 || isDeferred==1 ); /* EV: R-30323-21917 */
  pFKey->isDeferred = (u8)isDeferred;
#endif
}

/*
** Generate code that will erase and refill index *pIdx.  This is

       && sqlite3UserAuthTable(pTab->zName)==0
#endif
  ){
    sqlite3ErrorMsg(pParse, "table %s may not be indexed", pTab->zName);
    goto exit_create_index;
  }
#ifndef SQLITE_OMIT_VIEW
  if( IsView(pTab) ){
    sqlite3ErrorMsg(pParse, "views may not be indexed");
    goto exit_create_index;
  }
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( IsVirtual(pTab) ){
    sqlite3ErrorMsg(pParse, "virtual tables may not be indexed");

  ** key out of the last column added to the table under construction.
  ** So create a fake list to simulate this.
  */
  if( pList==0 ){
    Token prevCol;
    Column *pCol = &pTab->aCol[pTab->nCol-1];
    pCol->colFlags |= COLFLAG_UNIQUE;
    sqlite3TokenInit(&prevCol, pCol->zCnName);
    pList = sqlite3ExprListAppend(pParse, 0,
              sqlite3ExprAlloc(db, TK_ID, &prevCol, 0));
    if( pList==0 ) goto exit_create_index;
    assert( pList->nExpr==1 );
    sqlite3ExprListSetSortOrder(pList, sortOrder, SQLITE_SO_UNDEFINED);
  }else{
    sqlite3ExprListCheckLength(pParse, pList, "index");

      nColl = sqlite3Strlen30(zColl) + 1;
      assert( nExtra>=nColl );
      memcpy(zExtra, zColl, nColl);
      zColl = zExtra;
      zExtra += nColl;
      nExtra -= nColl;
    }else if( j>=0 ){
      zColl = sqlite3ColumnColl(&pTab->aCol[j]);
    }
    if( !zColl ) zColl = sqlite3StrBINARY;
    if( !db->init.busy && !sqlite3LocateCollSeq(pParse, zColl) ){
      goto exit_create_index;
    }
    pIndex->azColl[i] = zColl;
    requestedSortOrder = pListItem->sortFlags & sortOrderMask;

                      pParse->db->aLimit[SQLITE_LIMIT_LENGTH]);
  if( pIdx->aColExpr ){
    sqlite3_str_appendf(&errMsg, "index '%q'", pIdx->zName);
  }else{
    for(j=0; j<pIdx->nKeyCol; j++){
      char *zCol;
      assert( pIdx->aiColumn[j]>=0 );
      zCol = pTab->aCol[pIdx->aiColumn[j]].zCnName;
      if( j ) sqlite3_str_append(&errMsg, ", ", 2);
      sqlite3_str_appendall(&errMsg, pTab->zName);
      sqlite3_str_append(&errMsg, ".", 1);
      sqlite3_str_appendall(&errMsg, zCol);
    }
  }
  zErr = sqlite3StrAccumFinish(&errMsg);

  int onError,      /* Conflict resolution algorithm */
  Table *pTab       /* The table with the non-unique rowid */
){
  char *zMsg;
  int rc;
  if( pTab->iPKey>=0 ){
    zMsg = sqlite3MPrintf(pParse->db, "%s.%s", pTab->zName,
                          pTab->aCol[pTab->iPKey].zCnName);
    rc = SQLITE_CONSTRAINT_PRIMARYKEY;
  }else{
    zMsg = sqlite3MPrintf(pParse->db, "%s.rowid", pTab->zName);
    rc = SQLITE_CONSTRAINT_ROWID;
  }
  sqlite3HaltConstraint(pParse, rc, onError, zMsg, P4_DYNAMIC,
                        P5_ConstraintUnique);

*/
SQLITE_PRIVATE int sqlite3IsReadOnly(Parse *pParse, Table *pTab, int viewOk){
  if( tabIsReadOnly(pParse, pTab) ){
    sqlite3ErrorMsg(pParse, "table %s may not be modified", pTab->zName);
    return 1;
  }
#ifndef SQLITE_OMIT_VIEW
  if( !viewOk && IsView(pTab) ){
    sqlite3ErrorMsg(pParse,"cannot modify %s because it is a view",pTab->zName);
    return 1;
  }
#endif
  return 0;
}

    pLhs = sqlite3PExpr(pParse, TK_ROW, 0, 0);
    pEList = sqlite3ExprListAppend(
        pParse, 0, sqlite3PExpr(pParse, TK_ROW, 0, 0)
    );
  }else{
    Index *pPk = sqlite3PrimaryKeyIndex(pTab);
    if( pPk->nKeyCol==1 ){
      const char *zName = pTab->aCol[pPk->aiColumn[0]].zCnName;
      pLhs = sqlite3Expr(db, TK_ID, zName);
      pEList = sqlite3ExprListAppend(pParse, 0, sqlite3Expr(db, TK_ID, zName));
    }else{
      int i;
      for(i=0; i<pPk->nKeyCol; i++){
        Expr *p = sqlite3Expr(db, TK_ID, pTab->aCol[pPk->aiColumn[i]].zCnName);
        pEList = sqlite3ExprListAppend(pParse, pEList, p);
      }
      pLhs = sqlite3PExpr(pParse, TK_VECTOR, 0, 0);
      if( pLhs ){
        pLhs->x.pList = sqlite3ExprListDup(db, pEList, 0);
      }
    }

  if( pTab==0 )  goto delete_from_cleanup;

  /* Figure out if we have any triggers and if the table being
  ** deleted from is a view
  */
#ifndef SQLITE_OMIT_TRIGGER
  pTrigger = sqlite3TriggersExist(pParse, pTab, TK_DELETE, 0, 0);
  isView = IsView(pTab);
#else
# define pTrigger 0
# define isView 0
#endif
  bComplex = pTrigger || sqlite3FkRequired(pParse, pTab, 0, 0);
#ifdef SQLITE_OMIT_VIEW
# undef isView

    /* Set up a loop over the rowids/primary-keys that were found in the
    ** where-clause loop above.
    */
    if( eOnePass!=ONEPASS_OFF ){
      assert( nKey==nPk );  /* OP_Found will use an unpacked key */
      if( !IsVirtual(pTab) && aToOpen[iDataCur-iTabCur] ){
        assert( pPk!=0 || IsView(pTab) );
        sqlite3VdbeAddOp4Int(v, OP_NotFound, iDataCur, addrBypass, iKey, nKey);
        VdbeCoverage(v);
      }
    }else if( pPk ){
      addrLoop = sqlite3VdbeAddOp1(v, OP_Rewind, iEphCur); VdbeCoverage(v);
      if( IsVirtual(pTab) ){
        sqlite3VdbeAddOp3(v, OP_Column, iEphCur, 0, iKey);

  **
  ** If variable 'count' is non-zero, then this OP_Delete instruction should
  ** invoke the update-hook. The pre-update-hook, on the other hand should
  ** be invoked unless table pTab is a system table. The difference is that
  ** the update-hook is not invoked for rows removed by REPLACE, but the
  ** pre-update-hook is.
  */
  if( !IsView(pTab) ){
    u8 p5 = 0;
    sqlite3GenerateRowIndexDelete(pParse, pTab, iDataCur, iIdxCur,0,iIdxNoSeek);
    sqlite3VdbeAddOp2(v, OP_Delete, iDataCur, (count?OPFLAG_NCHANGE:0));
    if( pParse->nested==0 || 0==sqlite3_stricmp(pTab->zName, "sqlite_stat1") ){
      sqlite3VdbeAppendP4(v, (char*)pTab, P4_TABLE);
    }
    if( eMode!=ONEPASS_OFF ){

    **   1) There is an INTEGER PRIMARY KEY column and the FK is implicitly
    **      mapped to the primary key of table pParent, or
    **   2) The FK is explicitly mapped to a column declared as INTEGER
    **      PRIMARY KEY.
    */
    if( pParent->iPKey>=0 ){
      if( !zKey ) return 0;
      if( !sqlite3StrICmp(pParent->aCol[pParent->iPKey].zCnName, zKey) ){
        return 0;
      }
    }
  }else if( paiCol ){
    assert( nCol>1 );
    aiCol = (int *)sqlite3DbMallocRawNN(pParse->db, nCol*sizeof(int));
    if( !aiCol ) return 1;
    *paiCol = aiCol;
  }

          char *zIdxCol;                    /* Name of indexed column */

          if( iCol<0 ) break; /* No foreign keys against expression indexes */

          /* If the index uses a collation sequence that is different from
          ** the default collation sequence for the column, this index is
          ** unusable. Bail out early in this case.  */
          zDfltColl = sqlite3ColumnColl(&pParent->aCol[iCol]);
          if( !zDfltColl ) zDfltColl = sqlite3StrBINARY;
          if( sqlite3StrICmp(pIdx->azColl[i], zDfltColl) ) break;

          zIdxCol = pParent->aCol[iCol].zCnName;
          for(j=0; j<nCol; j++){
            if( sqlite3StrICmp(pFKey->aCol[j].zCol, zIdxCol)==0 ){
              if( aiCol ) aiCol[i] = pFKey->aCol[j].iFrom;
              break;
            }
          }
          if( j==nCol ) break;

  pExpr = sqlite3Expr(db, TK_REGISTER, 0);
  if( pExpr ){
    if( iCol>=0 && iCol!=pTab->iPKey ){
      pCol = &pTab->aCol[iCol];
      pExpr->iTable = regBase + sqlite3TableColumnToStorage(pTab,iCol) + 1;
      pExpr->affExpr = pCol->affinity;
      zColl = sqlite3ColumnColl(pCol);
      if( zColl==0 ) zColl = db->pDfltColl->zName;
      pExpr = sqlite3ExprAddCollateString(pParse, pExpr, zColl);
    }else{
      pExpr->iTable = regBase;
      pExpr->affExpr = SQLITE_AFF_INTEGER;
    }
  }

    i16 iCol;                     /* Index of column in child table */
    const char *zCol;             /* Name of column in child table */

    iCol = pIdx ? pIdx->aiColumn[i] : -1;
    pLeft = exprTableRegister(pParse, pTab, regData, iCol);
    iCol = aiCol ? aiCol[i] : pFKey->aCol[0].iFrom;
    assert( iCol>=0 );
    zCol = pFKey->pFrom->aCol[iCol].zCnName;
    pRight = sqlite3Expr(db, TK_ID, zCol);
    pEq = sqlite3PExpr(pParse, TK_EQ, pLeft, pRight);
    pWhere = sqlite3ExprAnd(pParse, pWhere, pEq);
  }

  /* If the child table is the same as the parent table, then add terms
  ** to the WHERE clause that prevent this entry from being scanned.

    }else{
      Expr *pEq, *pAll = 0;
      assert( pIdx!=0 );
      for(i=0; i<pIdx->nKeyCol; i++){
        i16 iCol = pIdx->aiColumn[i];
        assert( iCol>=0 );
        pLeft = exprTableRegister(pParse, pTab, regData, iCol);
        pRight = sqlite3Expr(db, TK_ID, pTab->aCol[iCol].zCnName);
        pEq = sqlite3PExpr(pParse, TK_IS, pLeft, pRight);
        pAll = sqlite3ExprAnd(pParse, pAll, pEq);
      }
      pNe = sqlite3PExpr(pParse, TK_NOT, pAll, 0);
    }
    pWhere = sqlite3ExprAnd(pParse, pWhere, pNe);
  }

SQLITE_PRIVATE void sqlite3FkDropTable(Parse *pParse, SrcList *pName, Table *pTab){
  sqlite3 *db = pParse->db;
  if( (db->flags&SQLITE_ForeignKeys) && !IsVirtual(pTab) ){
    int iSkip = 0;
    Vdbe *v = sqlite3GetVdbe(pParse);

    assert( v );                  /* VDBE has already been allocated */
    assert( !IsView(pTab) );      /* Not a view */
    assert( !IsVirtual(pTab) );
    if( sqlite3FkReferences(pTab)==0 ){
      /* Search for a deferred foreign key constraint for which this table
      ** is the child table. If one cannot be found, return without
      ** generating any VDBE code. If one can be found, then jump over
      ** the entire DELETE if there are no outstanding deferred constraints
      ** when this statement is run.  */
      FKey *p;
      for(p=pTab->u.tab.pFKey; p; p=p->pNextFrom){
        if( p->isDeferred || (db->flags & SQLITE_DeferFKs) ) break;
      }
      if( !p ) return;
      iSkip = sqlite3VdbeMakeLabel(pParse);
      sqlite3VdbeAddOp2(v, OP_FkIfZero, 1, iSkip); VdbeCoverage(v);
    }

  for(i=0; i<p->nCol; i++){
    char *zKey = p->aCol[i].zCol;
    int iKey;
    for(iKey=0; iKey<pTab->nCol; iKey++){
      if( aChange[iKey]>=0 || (iKey==pTab->iPKey && bChngRowid) ){
        Column *pCol = &pTab->aCol[iKey];
        if( zKey ){
          if( 0==sqlite3StrICmp(pCol->zCnName, zKey) ) return 1;
        }else if( pCol->colFlags & COLFLAG_PRIMKEY ){
          return 1;
        }
      }
    }
  }
  return 0;

  if( (db->flags&SQLITE_ForeignKeys)==0 ) return;

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

  /* Loop through all the foreign key constraints for which pTab is the
  ** child table (the table that the foreign key definition is part of).  */
  assert( !IsVirtual(pTab) );
  for(pFKey=pTab->u.tab.pFKey; pFKey; pFKey=pFKey->pNextFrom){
    Table *pTo;                   /* Parent table of foreign key pFKey */
    Index *pIdx = 0;              /* Index on key columns in pTo */
    int *aiFree = 0;
    int *aiCol;
    int iCol;
    int i;
    int bIgnore = 0;

      assert( pIdx==0 || pIdx->aiColumn[i]>=0 );
#ifndef SQLITE_OMIT_AUTHORIZATION
      /* Request permission to read the parent key columns. If the
      ** authorization callback returns SQLITE_IGNORE, behave as if any
      ** values read from the parent table are NULL. */
      if( db->xAuth ){
        int rcauth;
        char *zCol = pTo->aCol[pIdx ? pIdx->aiColumn[i] : pTo->iPKey].zCnName;
        rcauth = sqlite3AuthReadCol(pParse, pTo->zName, zCol, iDb);
        bIgnore = (rcauth==SQLITE_IGNORE);
      }
#endif
    }

    /* Take a shared-cache advisory read-lock on the parent table. Allocate

  Parse *pParse,                  /* Parse context */
  Table *pTab                     /* Table being modified */
){
  u32 mask = 0;
  if( pParse->db->flags&SQLITE_ForeignKeys ){
    FKey *p;
    int i;
    assert( !IsVirtual(pTab) );
    for(p=pTab->u.tab.pFKey; p; p=p->pNextFrom){
      for(i=0; i<p->nCol; i++) mask |= COLUMN_MASK(p->aCol[i].iFrom);
    }
    for(p=sqlite3FkReferences(pTab); p; p=p->pNextTo){
      Index *pIdx = 0;
      sqlite3FkLocateIndex(pParse, pTab, p, &pIdx, 0);
      if( pIdx ){
        for(i=0; i<pIdx->nKeyCol; i++){

  Parse *pParse,                  /* Parse context */
  Table *pTab,                    /* Table being modified */
  int *aChange,                   /* Non-NULL for UPDATE operations */
  int chngRowid                   /* True for UPDATE that affects rowid */
){
  int eRet = 1;                   /* Value to return if bHaveFK is true */
  int bHaveFK = 0;                /* If FK processing is required */
  if( pParse->db->flags&SQLITE_ForeignKeys && !IsVirtual(pTab) ){
    if( !aChange ){
      /* A DELETE operation. Foreign key processing is required if the
      ** table in question is either the child or parent table for any
      ** foreign key constraint.  */
      bHaveFK = (sqlite3FkReferences(pTab) || pTab->u.tab.pFKey);
    }else{
      /* This is an UPDATE. Foreign key processing is only required if the
      ** operation modifies one or more child or parent key columns. */
      FKey *p;

      /* Check if any child key columns are being modified. */
      for(p=pTab->u.tab.pFKey; p; p=p->pNextFrom){
        if( fkChildIsModified(pTab, p, aChange, chngRowid) ){
          if( 0==sqlite3_stricmp(pTab->zName, p->zTo) ) eRet = 2;
          bHaveFK = 1;
        }
      }

      /* Check if any parent key columns are being modified. */

      Expr *pEq;                  /* tFromCol = OLD.tToCol */

      iFromCol = aiCol ? aiCol[i] : pFKey->aCol[0].iFrom;
      assert( iFromCol>=0 );
      assert( pIdx!=0 || (pTab->iPKey>=0 && pTab->iPKey<pTab->nCol) );
      assert( pIdx==0 || pIdx->aiColumn[i]>=0 );
      sqlite3TokenInit(&tToCol,
                   pTab->aCol[pIdx ? pIdx->aiColumn[i] : pTab->iPKey].zCnName);
      sqlite3TokenInit(&tFromCol, pFKey->pFrom->aCol[iFromCol].zCnName);

      /* Create the expression "OLD.zToCol = zFromCol". It is important
      ** that the "OLD.zToCol" term is on the LHS of the = operator, so
      ** that the affinity and collation sequence associated with the
      ** parent table are used for the comparison. */
      pEq = sqlite3PExpr(pParse, TK_EQ,
          sqlite3PExpr(pParse, TK_DOT,

          Column *pCol = pFKey->pFrom->aCol + iFromCol;
          Expr *pDflt;
          if( pCol->colFlags & COLFLAG_GENERATED ){
            testcase( pCol->colFlags & COLFLAG_VIRTUAL );
            testcase( pCol->colFlags & COLFLAG_STORED );
            pDflt = 0;
          }else{
            pDflt = sqlite3ColumnExpr(pFKey->pFrom, pCol);
          }
          if( pDflt ){
            pNew = sqlite3ExprDup(db, pDflt, 0);
          }else{
            pNew = sqlite3ExprAlloc(db, TK_NULL, 0, 0);
          }
        }else{

** table pTab. Remove the deleted foreign keys from the Schema.fkeyHash
** hash table.
*/
SQLITE_PRIVATE void sqlite3FkDelete(sqlite3 *db, Table *pTab){
  FKey *pFKey;                    /* Iterator variable */
  FKey *pNext;                    /* Copy of pFKey->pNextFrom */

  assert( !IsVirtual(pTab) );
  for(pFKey=pTab->u.tab.pFKey; pFKey; pFKey=pNext){
    assert( db==0 || sqlite3SchemaMutexHeld(db, 0, pTab->pSchema) );


    /* Remove the FK from the fkeyHash hash table. */
    if( !db || db->pnBytesFreed==0 ){
      if( pFKey->pPrevTo ){
        pFKey->pPrevTo->pNextTo = pFKey->pNextTo;
      }else{
        void *p = (void *)pFKey->pNextTo;

    pRedo = 0;
    for(i=0; i<pTab->nCol; i++){
      Column *pCol = pTab->aCol + i;
      if( (pCol->colFlags & COLFLAG_NOTAVAIL)!=0 ){
        int x;
        pCol->colFlags |= COLFLAG_BUSY;
        w.eCode = 0;
        sqlite3WalkExpr(&w, sqlite3ColumnExpr(pTab, pCol));
        pCol->colFlags &= ~COLFLAG_BUSY;
        if( w.eCode & COLFLAG_NOTAVAIL ){
          pRedo = pCol;
          continue;
        }
        eProgress = 1;
        assert( pCol->colFlags & COLFLAG_GENERATED );
        x = sqlite3TableColumnToStorage(pTab, i) + iRegStore;
        sqlite3ExprCodeGeneratedColumn(pParse, pTab, pCol, x);
        pCol->colFlags &= ~COLFLAG_NOTAVAIL;
      }
    }
  }while( pRedo && eProgress );
  if( pRedo ){
    sqlite3ErrorMsg(pParse, "generated column loop on \"%s\"", pRedo->zCnName);
  }
  pParse->iSelfTab = 0;
}
#endif /* SQLITE_OMIT_GENERATED_COLUMNS */


#ifndef SQLITE_OMIT_AUTOINCREMENT

  withoutRowid = !HasRowid(pTab);

  /* Figure out if we have any triggers and if the table being
  ** inserted into is a view
  */
#ifndef SQLITE_OMIT_TRIGGER
  pTrigger = sqlite3TriggersExist(pParse, pTab, TK_INSERT, 0, &tmask);
  isView = IsView(pTab);
#else
# define pTrigger 0
# define tmask 0
# define isView 0
#endif
#ifdef SQLITE_OMIT_VIEW
# undef isView

  bIdListInOrder = (pTab->tabFlags & (TF_OOOHidden|TF_HasStored))==0;
  if( pColumn ){
    for(i=0; i<pColumn->nId; i++){
      pColumn->a[i].idx = -1;
    }
    for(i=0; i<pColumn->nId; i++){
      for(j=0; j<pTab->nCol; j++){
        if( sqlite3StrICmp(pColumn->a[i].zName, pTab->aCol[j].zCnName)==0 ){
          pColumn->a[i].idx = j;
          if( i!=j ) bIdListInOrder = 0;
          if( j==pTab->iPKey ){
            ipkColumn = i;  assert( !withoutRowid );
          }
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
          if( pTab->aCol[j].colFlags & (COLFLAG_STORED|COLFLAG_VIRTUAL) ){
            sqlite3ErrorMsg(pParse,
               "cannot INSERT into generated column \"%s\"",
               pTab->aCol[j].zCnName);
            goto insert_cleanup;
          }
#endif
          break;
        }
      }
      if( j>=pTab->nCol ){

  if( pUpsert ){
    Upsert *pNx;
    if( IsVirtual(pTab) ){
      sqlite3ErrorMsg(pParse, "UPSERT not implemented for virtual table \"%s\"",
              pTab->zName);
      goto insert_cleanup;
    }
    if( IsView(pTab) ){
      sqlite3ErrorMsg(pParse, "cannot UPSERT a view");
      goto insert_cleanup;
    }
    if( sqlite3HasExplicitNulls(pParse, pUpsert->pUpsertTarget) ){
      goto insert_cleanup;
    }
    pTabList->a[0].iCursor = iDataCur;

        if( tmask & TRIGGER_BEFORE ){
          sqlite3VdbeAddOp1(v, OP_SoftNull, iRegStore);
        }
        continue;
      }else if( pColumn==0 ){
        /* Hidden columns that are not explicitly named in the INSERT
        ** get there default value */
        sqlite3ExprCodeFactorable(pParse,
            sqlite3ColumnExpr(pTab, &pTab->aCol[i]),
            iRegStore);
        continue;
      }
    }
    if( pColumn ){
      for(j=0; j<pColumn->nId && pColumn->a[j].idx!=i; j++){}
      if( j>=pColumn->nId ){
        /* A column not named in the insert column list gets its
        ** default value */
        sqlite3ExprCodeFactorable(pParse,
            sqlite3ColumnExpr(pTab, &pTab->aCol[i]),
            iRegStore);
        continue;
      }
      k = j;
    }else if( nColumn==0 ){
      /* This is INSERT INTO ... DEFAULT VALUES.  Load the default value. */
      sqlite3ExprCodeFactorable(pParse,
          sqlite3ColumnExpr(pTab, &pTab->aCol[i]),
          iRegStore);
      continue;
    }else{
      k = i - nHidden;
    }

    if( useTempTable ){
      sqlite3VdbeAddOp3(v, OP_Column, srcTab, k, iRegStore);

  int nReplaceTrig = 0; /* Number of replace triggers coded */
  IndexIterator sIdxIter;  /* Index iterator */

  isUpdate = regOldData!=0;
  db = pParse->db;
  v = pParse->pVdbe;
  assert( v!=0 );
  assert( !IsView(pTab) );  /* This table is not a VIEW */
  nCol = pTab->nCol;

  /* pPk is the PRIMARY KEY index for WITHOUT ROWID tables and NULL for
  ** normal rowid tables.  nPkField is the number of key fields in the
  ** pPk index or 1 for a rowid table.  In other words, nPkField is the
  ** number of fields in the true primary key of the table. */
  if( HasRowid(pTab) ){

        if( overrideError!=OE_Default ){
          onError = overrideError;
        }else if( onError==OE_Default ){
          onError = OE_Abort;
        }
        if( onError==OE_Replace ){
          if( b2ndPass        /* REPLACE becomes ABORT on the 2nd pass */
           || pCol->iDflt==0  /* REPLACE is ABORT if no DEFAULT value */
          ){
            testcase( pCol->colFlags & COLFLAG_VIRTUAL );
            testcase( pCol->colFlags & COLFLAG_STORED );
            testcase( pCol->colFlags & COLFLAG_GENERATED );
            onError = OE_Abort;
          }else{
            assert( !isGenerated );

        iReg = sqlite3TableColumnToStorage(pTab, i) + regNewData + 1;
        switch( onError ){
          case OE_Replace: {
            int addr1 = sqlite3VdbeAddOp1(v, OP_NotNull, iReg);
            VdbeCoverage(v);
            assert( (pCol->colFlags & COLFLAG_GENERATED)==0 );
            nSeenReplace++;
            sqlite3ExprCodeCopy(pParse,
               sqlite3ColumnExpr(pTab, pCol), iReg);
            sqlite3VdbeJumpHere(v, addr1);
            break;
          }
          case OE_Abort:
            sqlite3MayAbort(pParse);
            /* no break */ deliberate_fall_through
          case OE_Rollback:
          case OE_Fail: {
            char *zMsg = sqlite3MPrintf(db, "%s.%s", pTab->zName,
                                        pCol->zCnName);
            sqlite3VdbeAddOp3(v, OP_HaltIfNull, SQLITE_CONSTRAINT_NOTNULL,
                              onError, iReg);
            sqlite3VdbeAppendP4(v, zMsg, P4_DYNAMIC);
            sqlite3VdbeChangeP5(v, P5_ConstraintNotNull);
            VdbeCoverage(v);
            break;
          }

        x = regNewData;
        sqlite3VdbeAddOp2(v, OP_IntCopy, x, regIdx+i);
        VdbeComment((v, "rowid"));
      }else{
        testcase( sqlite3TableColumnToStorage(pTab, iField)!=iField );
        x = sqlite3TableColumnToStorage(pTab, iField) + regNewData + 1;
        sqlite3VdbeAddOp2(v, OP_SCopy, x, regIdx+i);
        VdbeComment((v, "%s", pTab->aCol[iField].zCnName));
      }
    }
    sqlite3VdbeAddOp3(v, OP_MakeRecord, regIdx, pIdx->nColumn, aRegIdx[ix]);
    VdbeComment((v, "for %s", pIdx->zName));
#ifdef SQLITE_ENABLE_NULL_TRIM
    if( pIdx->idxType==SQLITE_IDXTYPE_PRIMARYKEY ){
      sqlite3SetMakeRecordP5(v, pIdx->pTable);

#ifndef SQLITE_ENABLE_PREUPDATE_HOOK
    if( (ix==0 && pIdx->pNext==0)                   /* Condition 3 */
     && pPk==pIdx                                   /* Condition 2 */
     && onError==OE_Replace                         /* Condition 1 */
     && ( 0==(db->flags&SQLITE_RecTriggers) ||      /* Condition 4 */
          0==sqlite3TriggersExist(pParse, pTab, TK_DELETE, 0, 0))
     && ( 0==(db->flags&SQLITE_ForeignKeys) ||      /* Condition 5 */
         (0==pTab->u.tab.pFKey && 0==sqlite3FkReferences(pTab)))
    ){
      sqlite3VdbeResolveLabel(v, addrUniqueOk);
      continue;
    }
#endif /* ifndef SQLITE_ENABLE_PREUPDATE_HOOK */

    /* Check to see if the new index entry will be unique */

        ** store it in registers regR..regR+nPk-1 */
        if( pIdx!=pPk ){
          for(i=0; i<pPk->nKeyCol; i++){
            assert( pPk->aiColumn[i]>=0 );
            x = sqlite3TableColumnToIndex(pIdx, pPk->aiColumn[i]);
            sqlite3VdbeAddOp3(v, OP_Column, iThisCur, x, regR+i);
            VdbeComment((v, "%s.%s", pTab->zName,
                         pTab->aCol[pPk->aiColumn[i]].zCnName));
          }
        }
        if( isUpdate ){
          /* If currently processing the PRIMARY KEY of a WITHOUT ROWID
          ** table, only conflict if the new PRIMARY KEY values are actually
          ** different from the old.
          **

  u16 i;

  /* Records with omitted columns are only allowed for schema format
  ** version 2 and later (SQLite version 3.1.4, 2005-02-20). */
  if( pTab->pSchema->file_format<2 ) return;

  for(i=pTab->nCol-1; i>0; i--){
    if( pTab->aCol[i].iDflt!=0 ) break;
    if( pTab->aCol[i].colFlags & COLFLAG_PRIMKEY ) break;
  }
  sqlite3VdbeChangeP5(v, i+1);
}
#endif

/*

  assert( update_flags==0
       || update_flags==OPFLAG_ISUPDATE
       || update_flags==(OPFLAG_ISUPDATE|OPFLAG_SAVEPOSITION)
  );

  v = pParse->pVdbe;
  assert( v!=0 );
  assert( !IsView(pTab) );  /* This table is not a VIEW */
  for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    /* All REPLACE indexes are at the end of the list */
    assert( pIdx->onError!=OE_Replace
         || pIdx->pNext==0
         || pIdx->pNext->onError==OE_Replace );
    if( aRegIdx[i]==0 ) continue;
    if( pIdx->pPartIdxWhere ){

  if( pSrc->tnum==pDest->tnum && pSrc->pSchema==pDest->pSchema ){
    testcase( pSrc!=pDest ); /* Possible due to bad sqlite_schema.rootpage */
    return 0;   /* tab1 and tab2 may not be the same table */
  }
  if( HasRowid(pDest)!=HasRowid(pSrc) ){
    return 0;   /* source and destination must both be WITHOUT ROWID or not */
  }

  if( !IsOrdinaryTable(pSrc) ){




    return 0;   /* tab2 may not be a view or virtual table */
  }
  if( pDest->nCol!=pSrc->nCol ){
    return 0;   /* Number of columns must be the same in tab1 and tab2 */
  }
  if( pDest->iPKey!=pSrc->iPKey ){
    return 0;   /* Both tables must have the same INTEGER PRIMARY KEY */
  }

      return 0;    /* Both columns have the same generated-column type */
    }
    /* But the transfer is only allowed if both the source and destination
    ** tables have the exact same expressions for generated columns.
    ** This requirement could be relaxed for VIRTUAL columns, I suppose.
    */
    if( (pDestCol->colFlags & COLFLAG_GENERATED)!=0 ){
      if( sqlite3ExprCompare(0,
             sqlite3ColumnExpr(pSrc, pSrcCol),
             sqlite3ColumnExpr(pDest, pDestCol), -1)!=0 ){
        testcase( pDestCol->colFlags & COLFLAG_VIRTUAL );
        testcase( pDestCol->colFlags & COLFLAG_STORED );
        return 0;  /* Different generator expressions */
      }
    }
#endif
    if( pDestCol->affinity!=pSrcCol->affinity ){
      return 0;    /* Affinity must be the same on all columns */
    }
    if( sqlite3_stricmp(sqlite3ColumnColl(pDestCol),
                        sqlite3ColumnColl(pSrcCol))!=0 ){
      return 0;    /* Collating sequence must be the same on all columns */
    }
    if( pDestCol->notNull && !pSrcCol->notNull ){
      return 0;    /* tab2 must be NOT NULL if tab1 is */
    }
    /* Default values for second and subsequent columns need to match. */
    if( (pDestCol->colFlags & COLFLAG_GENERATED)==0 && i>0 ){
      Expr *pDestExpr = sqlite3ColumnExpr(pDest, pDestCol);
      Expr *pSrcExpr = sqlite3ColumnExpr(pSrc, pSrcCol);
      assert( pDestExpr==0 || pDestExpr->op==TK_SPAN );
      assert( pSrcExpr==0 || pSrcExpr->op==TK_SPAN );
      if( (pDestExpr==0)!=(pSrcExpr==0)
       || (pDestExpr!=0 && strcmp(pDestExpr->u.zToken,
                                       pSrcExpr->u.zToken)!=0)
      ){
        return 0;    /* Default values must be the same for all columns */
      }
    }
  }
  for(pDestIdx=pDest->pIndex; pDestIdx; pDestIdx=pDestIdx->pNext){
    if( IsUniqueIndex(pDestIdx) ){

  /* Disallow the transfer optimization if the destination table constains
  ** any foreign key constraints.  This is more restrictive than necessary.
  ** But the main beneficiary of the transfer optimization is the VACUUM
  ** command, and the VACUUM command disables foreign key constraints.  So
  ** the extra complication to make this rule less restrictive is probably
  ** not worth the effort.  Ticket [6284df89debdfa61db8073e062908af0c9b6118e]
  */
  if( (db->flags & SQLITE_ForeignKeys)!=0 && pDest->u.tab.pFKey!=0 ){
    return 0;
  }
#endif
  if( (db->flags & SQLITE_CountRows)!=0 ){
    return 0;  /* xfer opt does not play well with PRAGMA count_changes */
  }

        if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){
          k = 0;
        }else if( pPk==0 ){
          k = 1;
        }else{
          for(k=1; k<=pTab->nCol && pPk->aiColumn[k-1]!=i; k++){}
        }
        assert( sqlite3ColumnExpr(pTab,pCol)==0
             || sqlite3ColumnExpr(pTab,pCol)->op==TK_SPAN
             || isHidden>=2 );
        sqlite3VdbeMultiLoad(v, 1, pPragma->iArg ? "issisii" : "issisi",
               i-nHidden,
               pCol->zCnName,
               sqlite3ColumnType(pCol,""),
               pCol->notNull ? 1 : 0,
               isHidden>=2 || sqlite3ColumnExpr(pTab,pCol)==0 ? 0 :
                          sqlite3ColumnExpr(pTab,pCol)->u.zToken,
               k,
               isHidden);
      }
    }
  }
  break;

      }
      pTab = pIdx->pTable;
      sqlite3CodeVerifySchema(pParse, iIdxDb);
      assert( pParse->nMem<=pPragma->nPragCName );
      for(i=0; i<mx; i++){
        i16 cnum = pIdx->aiColumn[i];
        sqlite3VdbeMultiLoad(v, 1, "iisX", i, cnum,
                             cnum<0 ? 0 : pTab->aCol[cnum].zCnName);
        if( pPragma->iArg ){
          sqlite3VdbeMultiLoad(v, 4, "isiX",
            pIdx->aSortOrder[i],
            pIdx->azColl[i],
            i<pIdx->nKeyCol);
        }
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, pParse->nMem);

#endif /* SQLITE_OMIT_SCHEMA_PRAGMAS */

#ifndef SQLITE_OMIT_FOREIGN_KEY
  case PragTyp_FOREIGN_KEY_LIST: if( zRight ){
    FKey *pFK;
    Table *pTab;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab && !IsVirtual(pTab) ){
      pFK = pTab->u.tab.pFKey;
      if( pFK ){
        int iTabDb = sqlite3SchemaToIndex(db, pTab->pSchema);
        int i = 0;
        pParse->nMem = 8;
        sqlite3CodeVerifySchema(pParse, iTabDb);
        while(pFK){
          int j;
          for(j=0; j<pFK->nCol; j++){
            sqlite3VdbeMultiLoad(v, 1, "iissssss",
                   i,
                   j,
                   pFK->zTo,
                   pTab->aCol[pFK->aCol[j].iFrom].zCnName,
                   pFK->aCol[j].zCol,
                   actionName(pFK->aAction[1]),  /* ON UPDATE */
                   actionName(pFK->aAction[0]),  /* ON DELETE */
                   "NONE");
          }
          ++i;
          pFK = pFK->pNextFrom;

      if( zRight ){
        pTab = sqlite3LocateTable(pParse, 0, zRight, zDb);
        k = 0;
      }else{
        pTab = (Table*)sqliteHashData(k);
        k = sqliteHashNext(k);
      }
      if( pTab==0 || IsVirtual(pTab) || pTab->u.tab.pFKey==0 ) continue;
      iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
      zDb = db->aDb[iDb].zDbSName;
      sqlite3CodeVerifySchema(pParse, iDb);
      sqlite3TableLock(pParse, iDb, pTab->tnum, 0, pTab->zName);
      if( pTab->nCol+regRow>pParse->nMem ) pParse->nMem = pTab->nCol + regRow;
      sqlite3OpenTable(pParse, 0, iDb, pTab, OP_OpenRead);
      sqlite3VdbeLoadString(v, regResult, pTab->zName);
      assert( !IsVirtual(pTab) );
      for(i=1, pFK=pTab->u.tab.pFKey; pFK; i++, pFK=pFK->pNextFrom){
        pParent = sqlite3FindTable(db, pFK->zTo, zDb);
        if( pParent==0 ) continue;
        pIdx = 0;
        sqlite3TableLock(pParse, iDb, pParent->tnum, 0, pParent->zName);
        x = sqlite3FkLocateIndex(pParse, pParent, pFK, &pIdx, 0);
        if( x==0 ){
          if( pIdx==0 ){

          break;
        }
      }
      assert( pParse->nErr>0 || pFK==0 );
      if( pFK ) break;
      if( pParse->nTab<i ) pParse->nTab = i;
      addrTop = sqlite3VdbeAddOp1(v, OP_Rewind, 0); VdbeCoverage(v);
      assert( !IsVirtual(pTab) );
      for(i=1, pFK=pTab->u.tab.pFKey; pFK; i++, pFK=pFK->pNextFrom){
        pParent = sqlite3FindTable(db, pFK->zTo, zDb);
        pIdx = 0;
        aiCols = 0;
        if( pParent ){
          x = sqlite3FkLocateIndex(pParse, pParent, pFK, &pIdx, &aiCols);
          assert( x==0 || db->mallocFailed );
        }

          if( pTab->aCol[j].notNull==0 ) continue;
          sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, j, 3);
          if( sqlite3VdbeGetOp(v,-1)->opcode==OP_Column ){
            sqlite3VdbeChangeP5(v, OPFLAG_TYPEOFARG);
          }
          jmp2 = sqlite3VdbeAddOp1(v, OP_NotNull, 3); VdbeCoverage(v);
          zErr = sqlite3MPrintf(db, "NULL value in %s.%s", pTab->zName,
                              pTab->aCol[j].zCnName);
          sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0, zErr, P4_DYNAMIC);
          integrityCheckResultRow(v);
          sqlite3VdbeJumpHere(v, jmp2);
        }
        /* Verify CHECK constraints */
        if( pTab->pCheck && (db->flags & SQLITE_IgnoreChecks)==0 ){
          ExprList *pCheck = sqlite3ExprListDup(db, pTab->pCheck, 0);

** is not contained in the table.
*/
SQLITE_PRIVATE int sqlite3ColumnIndex(Table *pTab, const char *zCol){
  int i;
  u8 h = sqlite3StrIHash(zCol);
  Column *pCol;
  for(pCol=pTab->aCol, i=0; i<pTab->nCol; pCol++, i++){
    if( pCol->hName==h && sqlite3StrICmp(pCol->zCnName, zCol)==0 ) return i;
  }
  return -1;
}

/*
** Search the first N tables in pSrc, from left to right, looking for a
** table that has a column named zCol.

      }
      for(j=0; j<pRightTab->nCol; j++){
        char *zName;   /* Name of column in the right table */
        int iLeft;     /* Matching left table */
        int iLeftCol;  /* Matching column in the left table */

        if( IsHiddenColumn(&pRightTab->aCol[j]) ) continue;
        zName = pRightTab->aCol[j].zCnName;
        if( tableAndColumnIndex(pSrc, i+1, zName, &iLeft, &iLeftCol, 1) ){
          addWhereTerm(pParse, pSrc, iLeft, iLeftCol, i+1, j,
                isOuter, &p->pWhere);
        }
      }
    }

*/
static void fixDistinctOpenEph(
  Parse *pParse,     /* Parsing and code generating context */
  int eTnctType,     /* WHERE_DISTINCT_* value */
  int iVal,          /* Value returned by codeDistinct() */
  int iOpenEphAddr   /* Address of OP_OpenEphemeral instruction for iTab */
){
  if( pParse->nErr==0
   && (eTnctType==WHERE_DISTINCT_UNIQUE || eTnctType==WHERE_DISTINCT_ORDERED)
  ){
    Vdbe *v = pParse->pVdbe;
    sqlite3VdbeChangeToNoop(v, iOpenEphAddr);
    if( sqlite3VdbeGetOp(v, iOpenEphAddr+1)->opcode==OP_Explain ){
      sqlite3VdbeChangeToNoop(v, iOpenEphAddr+1);
    }
    if( eTnctType==WHERE_DISTINCT_ORDERED ){
      /* Change the OP_OpenEphemeral to an OP_Null that sets the MEM_Cleared

#ifdef SQLITE_ENABLE_COLUMN_METADATA
        if( iCol<0 ) iCol = pTab->iPKey;
        assert( iCol==XN_ROWID || (iCol>=0 && iCol<pTab->nCol) );
        if( iCol<0 ){
          zType = "INTEGER";
          zOrigCol = "rowid";
        }else{
          zOrigCol = pTab->aCol[iCol].zCnName;
          zType = sqlite3ColumnType(&pTab->aCol[iCol],0);
        }
        zOrigTab = pTab->zName;
        if( pNC->pParse && pTab->pSchema ){
          int iDb = sqlite3SchemaToIndex(pNC->pParse->db, pTab->pSchema);
          zOrigDb = pNC->pParse->db->aDb[iDb].zDbSName;
        }

      pTab = p->y.pTab;
      assert( pTab!=0 );
      if( iCol<0 ) iCol = pTab->iPKey;
      assert( iCol==-1 || (iCol>=0 && iCol<pTab->nCol) );
      if( iCol<0 ){
        zCol = "rowid";
      }else{
        zCol = pTab->aCol[iCol].zCnName;
      }
      if( fullName ){
        char *zName = 0;
        zName = sqlite3MPrintf(db, "%s.%s", pTab->zName, zCol);
        sqlite3VdbeSetColName(v, i, COLNAME_NAME, zName, SQLITE_DYNAMIC);
      }else{
        sqlite3VdbeSetColName(v, i, COLNAME_NAME, zCol, SQLITE_TRANSIENT);

        pColExpr = pColExpr->pRight;
        assert( pColExpr!=0 );
      }
      if( pColExpr->op==TK_COLUMN && (pTab = pColExpr->y.pTab)!=0 ){
        /* For columns use the column name name */
        int iCol = pColExpr->iColumn;
        if( iCol<0 ) iCol = pTab->iPKey;
        zName = iCol>=0 ? pTab->aCol[iCol].zCnName : "rowid";
      }else if( pColExpr->op==TK_ID ){
        assert( !ExprHasProperty(pColExpr, EP_IntValue) );
        zName = pColExpr->u.zToken;
      }else{
        /* Use the original text of the column expression as its name */
        zName = pEList->a[i].zEName;
      }

      if( nName>0 ){
        for(j=nName-1; j>0 && sqlite3Isdigit(zName[j]); j--){}
        if( zName[j]==':' ) nName = j;
      }
      zName = sqlite3MPrintf(db, "%.*z:%u", nName, zName, ++cnt);
      if( cnt>3 ) sqlite3_randomness(sizeof(cnt), &cnt);
    }
    pCol->zCnName = zName;
    pCol->hName = sqlite3StrIHash(zName);
    sqlite3ColumnPropertiesFromName(0, pCol);
    if( zName && sqlite3HashInsert(&ht, zName, pCol)==pCol ){
      sqlite3OomFault(db);
    }
  }
  sqlite3HashClear(&ht);
  if( db->mallocFailed ){
    for(j=0; j<i; j++){
      sqlite3DbFree(db, aCol[j].zCnName);
    }
    sqlite3DbFree(db, aCol);
    *paCol = 0;
    *pnCol = 0;
    return SQLITE_NOMEM_BKPT;
  }
  return SQLITE_OK;

    pTab->tabFlags |= (pCol->colFlags & COLFLAG_NOINSERT);
    p = a[i].pExpr;
    zType = columnType(&sNC, p, 0, 0, 0);
    /* pCol->szEst = ... // Column size est for SELECT tables never used */
    pCol->affinity = sqlite3ExprAffinity(p);
    if( zType ){
      m = sqlite3Strlen30(zType);
      n = sqlite3Strlen30(pCol->zCnName);
      pCol->zCnName = sqlite3DbReallocOrFree(db, pCol->zCnName, n+m+2);
      if( pCol->zCnName ){
        memcpy(&pCol->zCnName[n+1], zType, m+1);
        pCol->colFlags |= COLFLAG_HASTYPE;
      }
    }
    if( pCol->affinity<=SQLITE_AFF_NONE ) pCol->affinity = aff;
    pColl = sqlite3ExprCollSeq(pParse, p);
    if( pColl && (pCol->colFlags & COLFLAG_HASCOLL)==0 ){
      assert( pTab->pIndex==0 );
      sqlite3ColumnSetColl(db, pCol, pColl->zName);
    }
  }
  pTab->szTabRow = 1; /* Any non-zero value works */
}

/*
** Given a SELECT statement, generate a Table structure that describes

  if( p->pWhere || p->pEList->nExpr!=1
   || p->pSrc->nSrc!=1 || p->pSrc->a[0].pSelect
  ){
    return 0;
  }
  pTab = p->pSrc->a[0].pTab;
  pExpr = p->pEList->a[0].pExpr;
  assert( pTab && !IsView(pTab) && pExpr );

  if( IsVirtual(pTab) ) return 0;
  if( pExpr->op!=TK_AGG_FUNCTION ) return 0;
  if( NEVER(pAggInfo->nFunc==0) ) return 0;
  if( (pAggInfo->aFunc[0].pFunc->funcFlags&SQLITE_FUNC_COUNT)==0 ) return 0;
  if( ExprHasProperty(pExpr, EP_Distinct|EP_WinFunc) ) return 0;

        return WRC_Abort;
      }
      pTab->nTabRef++;
      if( !IsVirtual(pTab) && cannotBeFunction(pParse, pFrom) ){
        return WRC_Abort;
      }
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
      if( !IsOrdinaryTable(pTab) ){
        i16 nCol;
        u8 eCodeOrig = pWalker->eCode;
        if( sqlite3ViewGetColumnNames(pParse, pTab) ) return WRC_Abort;
        assert( pFrom->pSelect==0 );
        if( IsView(pTab) ){
          if( (db->flags & SQLITE_EnableView)==0
           && pTab->pSchema!=db->aDb[1].pSchema
          ){
            sqlite3ErrorMsg(pParse, "access to view \"%s\" prohibited",
              pTab->zName);
          }
          pFrom->pSelect = sqlite3SelectDup(db, pTab->u.view.pSelect, 0);
        }else
#ifndef SQLITE_OMIT_VIRTUALTABLE

        if( ALWAYS(IsVirtual(pTab))
         && pFrom->fg.fromDDL
         && ALWAYS(pTab->u.vtab.p!=0)
         && pTab->u.vtab.p->eVtabRisk > ((db->flags & SQLITE_TrustedSchema)!=0)
        ){
          sqlite3ErrorMsg(pParse, "unsafe use of virtual table \"%s\"",
                                  pTab->zName);
        }
        assert( SQLITE_VTABRISK_Normal==1 && SQLITE_VTABRISK_High==2 );
#endif

        nCol = pTab->nCol;
        pTab->nCol = -1;
        pWalker->eCode = 1;  /* Turn on Select.selId renumbering */
        sqlite3WalkSelect(pWalker, pFrom->pSelect);
        pWalker->eCode = eCodeOrig;
        pTab->nCol = nCol;
      }

            if( zTName && sqlite3StrICmp(zTName, zTabName)!=0 ){
              continue;
            }
            iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
            zSchemaName = iDb>=0 ? db->aDb[iDb].zDbSName : "*";
          }
          for(j=0; j<pTab->nCol; j++){
            char *zName = pTab->aCol[j].zCnName;
            char *zColname;  /* The computed column name */
            char *zToFree;   /* Malloced string that needs to be freed */
            Token sColname;  /* Computed column name as a token */

            assert( zName );
            if( zTName && pSub
             && sqlite3MatchEName(&pSub->pEList->a[j], 0, zTName, 0)==0

    sqlite3ErrorMsg(pParse, "cannot create trigger on system table");
    goto trigger_cleanup;
  }

  /* INSTEAD of triggers are only for views and views only support INSTEAD
  ** of triggers.
  */
  if( IsView(pTab) && tr_tm!=TK_INSTEAD ){
    sqlite3ErrorMsg(pParse, "cannot create %s trigger on view: %S",
        (tr_tm == TK_BEFORE)?"BEFORE":"AFTER", pTableName->a);
    goto trigger_orphan_error;
  }
  if( !IsView(pTab) && tr_tm==TK_INSTEAD ){
    sqlite3ErrorMsg(pParse, "cannot create INSTEAD OF"
        " trigger on table: %S", pTableName->a);
    goto trigger_orphan_error;
  }

#ifndef SQLITE_OMIT_AUTHORIZATION
  if( !IN_RENAME_OBJECT ){

    Expr *pOldExpr = pList->a[i].pExpr;
    if( NEVER(pOldExpr==0) ) continue;
    if( isAsteriskTerm(pParse, pOldExpr) ){
      int jj;
      for(jj=0; jj<pTab->nCol; jj++){
        Expr *pNewExpr;
        if( IsHiddenColumn(pTab->aCol+jj) ) continue;
        pNewExpr = sqlite3Expr(db, TK_ID, pTab->aCol[jj].zCnName);
        pNew = sqlite3ExprListAppend(pParse, pNew, pNewExpr);
        if( !db->mallocFailed ){
          struct ExprList_item *pItem = &pNew->a[pNew->nExpr-1];
          pItem->zEName = sqlite3DbStrDup(db, pTab->aCol[jj].zCnName);
          pItem->eEName = ENAME_NAME;
        }
      }
    }else{
      Expr *pNewExpr = sqlite3ExprDup(db, pOldExpr, 0);
      pNew = sqlite3ExprListAppend(pParse, pNew, pNewExpr);
      if( !db->mallocFailed && ALWAYS(pList->a[i].zEName!=0) ){

** If column as REAL affinity and the table is an ordinary b-tree table
** (not a virtual table) then the value might have been stored as an
** integer.  In that case, add an OP_RealAffinity opcode to make sure
** it has been converted into REAL.
*/
SQLITE_PRIVATE void sqlite3ColumnDefault(Vdbe *v, Table *pTab, int i, int iReg){
  assert( pTab!=0 );
  if( !IsView(pTab) ){
    sqlite3_value *pValue = 0;
    u8 enc = ENC(sqlite3VdbeDb(v));
    Column *pCol = &pTab->aCol[i];
    VdbeComment((v, "%s.%s", pTab->zName, pCol->zCnName));
    assert( i<pTab->nCol );
    sqlite3ValueFromExpr(sqlite3VdbeDb(v),
                         sqlite3ColumnExpr(pTab,pCol), enc,
                         pCol->affinity, &pValue);
    if( pValue ){
      sqlite3VdbeAppendP4(v, pValue, P4_MEM);
    }
  }
#ifndef SQLITE_OMIT_FLOATING_POINT
  if( pTab->aCol[i].affinity==SQLITE_AFF_REAL && !IsVirtual(pTab) ){

      if( pLimit ){
        pGrp = sqlite3ExprListAppend(pParse, pGrp, sqlite3ExprDup(db, pNew, 0));
      }
#endif
      pList = sqlite3ExprListAppend(pParse, pList, pNew);
    }
    eDest = IsVirtual(pTab) ? SRT_Table : SRT_Upfrom;
  }else if( IsView(pTab) ){
    for(i=0; i<pTab->nCol; i++){
      pList = sqlite3ExprListAppend(pParse, pList, exprRowColumn(pParse, i));
    }
    eDest = SRT_Table;
  }else{
    eDest = IsVirtual(pTab) ? SRT_Table : SRT_Upfrom;
    pList = sqlite3ExprListAppend(pParse, 0, sqlite3PExpr(pParse,TK_ROW,0,0));

  iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);

  /* Figure out if we have any triggers and if the table being
  ** updated is a view.
  */
#ifndef SQLITE_OMIT_TRIGGER
  pTrigger = sqlite3TriggersExist(pParse, pTab, TK_UPDATE, pChanges, &tmask);
  isView = IsView(pTab);
  assert( pTrigger || tmask==0 );
#else
# define pTrigger 0
# define isView 0
# define tmask 0
#endif
#ifdef SQLITE_OMIT_VIEW

  ** of the UPDATE statement.  Also find the column index
  ** for each column to be updated in the pChanges array.  For each
  ** column to be updated, make sure we have authorization to change
  ** that column.
  */
  chngRowid = chngPk = 0;
  for(i=0; i<pChanges->nExpr; i++){
    u8 hCol = sqlite3StrIHash(pChanges->a[i].zEName);
    /* If this is an UPDATE with a FROM clause, do not resolve expressions
    ** here. The call to sqlite3Select() below will do that. */
    if( nChangeFrom==0 && sqlite3ResolveExprNames(&sNC, pChanges->a[i].pExpr) ){
      goto update_cleanup;
    }
    for(j=0; j<pTab->nCol; j++){
      if( pTab->aCol[j].hName==hCol
       && sqlite3StrICmp(pTab->aCol[j].zCnName, pChanges->a[i].zEName)==0
      ){
        if( j==pTab->iPKey ){
          chngRowid = 1;
          pRowidExpr = pChanges->a[i].pExpr;
          iRowidExpr = i;
        }else if( pPk && (pTab->aCol[j].colFlags & COLFLAG_PRIMKEY)!=0 ){
          chngPk = 1;
        }
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
        else if( pTab->aCol[j].colFlags & COLFLAG_GENERATED ){
          testcase( pTab->aCol[j].colFlags & COLFLAG_VIRTUAL );
          testcase( pTab->aCol[j].colFlags & COLFLAG_STORED );
          sqlite3ErrorMsg(pParse,
             "cannot UPDATE generated column \"%s\"",
             pTab->aCol[j].zCnName);
          goto update_cleanup;
        }
#endif
        aXRef[j] = i;
        break;
      }
    }

        goto update_cleanup;
      }
    }
#ifndef SQLITE_OMIT_AUTHORIZATION
    {
      int rc;
      rc = sqlite3AuthCheck(pParse, SQLITE_UPDATE, pTab->zName,
                            j<0 ? "ROWID" : pTab->aCol[j].zCnName,
                            db->aDb[iDb].zDbSName);
      if( rc==SQLITE_DENY ){
        goto update_cleanup;
      }else if( rc==SQLITE_IGNORE ){
        aXRef[j] = -1;
      }
    }

    testcase( pTab->tabFlags & TF_HasVirtual );
    testcase( pTab->tabFlags & TF_HasStored );
    do{
      bProgress = 0;
      for(i=0; i<pTab->nCol; i++){
        if( aXRef[i]>=0 ) continue;
        if( (pTab->aCol[i].colFlags & COLFLAG_GENERATED)==0 ) continue;
        if( sqlite3ExprReferencesUpdatedColumn(
                sqlite3ColumnExpr(pTab, &pTab->aCol[i]),
                 aXRef, chngRowid)
        ){
          aXRef[i] = 99999;
          bProgress = 1;
        }
      }
    }while( bProgress );
  }
#endif

      pParse->nMem += nPk;
      for(i=0; i<nPk; i++){
        int k;
        assert( pPk->aiColumn[i]>=0 );
        k = sqlite3TableColumnToIndex(pIdx, pPk->aiColumn[i]);
        sqlite3VdbeAddOp3(v, OP_Column, iCur, k, iPk+i);
        VdbeComment((v, "%s.%s", pIdx->zName,
                    pTab->aCol[pPk->aiColumn[i]].zCnName));
      }
      sqlite3VdbeVerifyAbortable(v, OE_Abort);
      i = sqlite3VdbeAddOp4Int(v, OP_Found, iDataCur, 0, iPk, nPk);
      VdbeCoverage(v);
      sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CORRUPT, OE_Abort, 0,
            "corrupt database", P4_STATIC);
      sqlite3MayAbort(pParse);

** pTab is a pointer to a Table structure representing a virtual-table.
** Return a pointer to the VTable object used by connection db to access
** this virtual-table, if one has been created, or NULL otherwise.
*/
SQLITE_PRIVATE VTable *sqlite3GetVTable(sqlite3 *db, Table *pTab){
  VTable *pVtab;
  assert( IsVirtual(pTab) );
  for(pVtab=pTab->u.vtab.p; pVtab && pVtab->db!=db; pVtab=pVtab->pNext);
  return pVtab;
}

/*
** Decrement the ref-count on a virtual table object. When the ref-count
** reaches zero, call the xDisconnect() method to delete the object.
*/

    }
    sqlite3DbFree(db, pVTab);
  }
}

/*
** Table p is a virtual table. This function moves all elements in the
** p->u.vtab.p list to the sqlite3.pDisconnect lists of their associated
** database connections to be disconnected at the next opportunity.
** Except, if argument db is not NULL, then the entry associated with
** connection db is left in the p->u.vtab.p list.
*/
static VTable *vtabDisconnectAll(sqlite3 *db, Table *p){
  VTable *pRet = 0;
  VTable *pVTable = p->u.vtab.p;
  p->u.vtab.p = 0;

  /* Assert that the mutex (if any) associated with the BtShared database
  ** that contains table p is held by the caller. See header comments
  ** above function sqlite3VtabUnlockList() for an explanation of why
  ** this makes it safe to access the sqlite3.pDisconnect list of any
  ** database connection that may have an entry in the p->u.vtab.p list.
  */
  assert( db==0 || sqlite3SchemaMutexHeld(db, 0, p->pSchema) );

  while( pVTable ){
    sqlite3 *db2 = pVTable->db;
    VTable *pNext = pVTable->pNext;
    assert( db2 );
    if( db2==db ){
      pRet = pVTable;
      p->u.vtab.p = pRet;
      pRet->pNext = 0;
    }else{
      pVTable->pNext = db2->pDisconnect;
      db2->pDisconnect = pVTable;
    }
    pVTable = pNext;
  }

SQLITE_PRIVATE void sqlite3VtabDisconnect(sqlite3 *db, Table *p){
  VTable **ppVTab;

  assert( IsVirtual(p) );
  assert( sqlite3BtreeHoldsAllMutexes(db) );
  assert( sqlite3_mutex_held(db->mutex) );

  for(ppVTab=&p->u.vtab.p; *ppVTab; ppVTab=&(*ppVTab)->pNext){
    if( (*ppVTab)->db==db  ){
      VTable *pVTab = *ppVTab;
      *ppVTab = pVTab->pNext;
      sqlite3VtabUnlock(pVTab);
      break;
    }
  }

** connection db is decremented immediately (which may lead to the
** structure being xDisconnected and free). Any other VTable structures
** in the list are moved to the sqlite3.pDisconnect list of the associated
** database connection.
*/
SQLITE_PRIVATE void sqlite3VtabClear(sqlite3 *db, Table *p){
  if( !db || db->pnBytesFreed==0 ) vtabDisconnectAll(0, p);
  if( p->u.vtab.azArg ){
    int i;
    for(i=0; i<p->u.vtab.nArg; i++){
      if( i!=1 ) sqlite3DbFree(db, p->u.vtab.azArg[i]);
    }
    sqlite3DbFree(db, p->u.vtab.azArg);
  }
}

/*
** Add a new module argument to pTable->u.vtab.azArg[].
** The string is not copied - the pointer is stored.  The
** string will be freed automatically when the table is
** deleted.
*/
static void addModuleArgument(Parse *pParse, Table *pTable, char *zArg){
  sqlite3_int64 nBytes = sizeof(char *)*(2+pTable->u.vtab.nArg);
  char **azModuleArg;
  sqlite3 *db = pParse->db;
  if( pTable->u.vtab.nArg+3>=db->aLimit[SQLITE_LIMIT_COLUMN] ){
    sqlite3ErrorMsg(pParse, "too many columns on %s", pTable->zName);
  }
  azModuleArg = sqlite3DbRealloc(db, pTable->u.vtab.azArg, nBytes);
  if( azModuleArg==0 ){
    sqlite3DbFree(db, zArg);
  }else{
    int i = pTable->u.vtab.nArg++;
    azModuleArg[i] = zArg;
    azModuleArg[i+1] = 0;
    pTable->u.vtab.azArg = azModuleArg;
  }
}

/*
** The parser calls this routine when it first sees a CREATE VIRTUAL TABLE
** statement.  The module name has been parsed, but the optional list
** of parameters that follow the module name are still pending.

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

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

  db = pParse->db;

  assert( pTable->u.vtab.nArg==0 );
  addModuleArgument(pParse, pTable, sqlite3NameFromToken(db, pModuleName));
  addModuleArgument(pParse, pTable, 0);
  addModuleArgument(pParse, pTable, sqlite3DbStrDup(db, pTable->zName));
  assert( (pParse->sNameToken.z==pName2->z && pName2->z!=0)
       || (pParse->sNameToken.z==pName1->z && pName2->z==0)
  );
  pParse->sNameToken.n = (int)(
      &pModuleName->z[pModuleName->n] - pParse->sNameToken.z
  );

#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Creating a virtual table invokes the authorization callback twice.
  ** The first invocation, to obtain permission to INSERT a row into the
  ** sqlite_schema table, has already been made by sqlite3StartTable().
  ** The second call, to obtain permission to create the table, is made now.
  */
  if( pTable->u.vtab.azArg ){
    int iDb = sqlite3SchemaToIndex(db, pTable->pSchema);
    assert( iDb>=0 ); /* The database the table is being created in */
    sqlite3AuthCheck(pParse, SQLITE_CREATE_VTABLE, pTable->zName,
            pTable->u.vtab.azArg[0], pParse->db->aDb[iDb].zDbSName);
  }
#endif
}

/*
** This routine takes the module argument that has been accumulating
** in pParse->zArg[] and appends it to the list of arguments on the

SQLITE_PRIVATE void sqlite3VtabFinishParse(Parse *pParse, Token *pEnd){
  Table *pTab = pParse->pNewTable;  /* The table being constructed */
  sqlite3 *db = pParse->db;         /* The database connection */

  if( pTab==0 ) return;
  addArgumentToVtab(pParse);
  pParse->sArg.z = 0;
  if( pTab->u.vtab.nArg<1 ) return;

  /* If the CREATE VIRTUAL TABLE statement is being entered for the
  ** first time (in other words if the virtual table is actually being
  ** created now instead of just being read out of sqlite_schema) then
  ** do additional initialization work and store the statement text
  ** in the sqlite_schema table.
  */

  Module *pMod,
  int (*xConstruct)(sqlite3*,void*,int,const char*const*,sqlite3_vtab**,char**),
  char **pzErr
){
  VtabCtx sCtx;
  VTable *pVTable;
  int rc;
  const char *const*azArg = (const char *const*)pTab->u.vtab.azArg;
  int nArg = pTab->u.vtab.nArg;
  char *zErr = 0;
  char *zModuleName;
  int iDb;
  VtabCtx *pCtx;

  /* Check that the virtual-table is not already being initialized */
  for(pCtx=db->pVtabCtx; pCtx; pCtx=pCtx->pPrior){

    return SQLITE_NOMEM_BKPT;
  }
  pVTable->db = db;
  pVTable->pMod = pMod;
  pVTable->eVtabRisk = SQLITE_VTABRISK_Normal;

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

  /* Invoke the virtual table constructor */
  assert( &db->pVtabCtx );
  assert( xConstruct );
  sCtx.pTab = pTab;
  sCtx.pVTable = pVTable;
  sCtx.pPrior = db->pVtabCtx;

      *pzErr = sqlite3MPrintf(db, zFormat, pTab->zName);
      sqlite3VtabUnlock(pVTable);
      rc = SQLITE_ERROR;
    }else{
      int iCol;
      u16 oooHidden = 0;
      /* If everything went according to plan, link the new VTable structure
      ** into the linked list headed by pTab->u.vtab.p. Then loop through the
      ** columns of the table to see if any of them contain the token "hidden".
      ** If so, set the Column COLFLAG_HIDDEN flag and remove the token from
      ** the type string.  */
      pVTable->pNext = pTab->u.vtab.p;
      pTab->u.vtab.p = pVTable;

      for(iCol=0; iCol<pTab->nCol; iCol++){
        char *zType = sqlite3ColumnType(&pTab->aCol[iCol], "");
        int nType;
        int i = 0;
        nType = sqlite3Strlen30(zType);
        for(i=0; i<nType; i++){

  assert( pTab );
  if( !IsVirtual(pTab) || sqlite3GetVTable(db, pTab) ){
    return SQLITE_OK;
  }

  /* Locate the required virtual table module */
  zMod = pTab->u.vtab.azArg[0];
  pMod = (Module*)sqlite3HashFind(&db->aModule, zMod);

  if( !pMod ){
    const char *zModule = pTab->u.vtab.azArg[0];
    sqlite3ErrorMsg(pParse, "no such module: %s", zModule);
    rc = SQLITE_ERROR;
  }else{
    char *zErr = 0;
    rc = vtabCallConstructor(db, pTab, pMod, pMod->pModule->xConnect, &zErr);
    if( rc!=SQLITE_OK ){
      sqlite3ErrorMsg(pParse, "%s", zErr);

SQLITE_PRIVATE int sqlite3VtabCallCreate(sqlite3 *db, int iDb, const char *zTab, char **pzErr){
  int rc = SQLITE_OK;
  Table *pTab;
  Module *pMod;
  const char *zMod;

  pTab = sqlite3FindTable(db, zTab, db->aDb[iDb].zDbSName);
  assert( pTab && IsVirtual(pTab) && !pTab->u.vtab.p );

  /* Locate the required virtual table module */
  zMod = pTab->u.vtab.azArg[0];
  pMod = (Module*)sqlite3HashFind(&db->aModule, zMod);

  /* If the module has been registered and includes a Create method,
  ** invoke it now. If the module has not been registered, return an
  ** error. Otherwise, do nothing.
  */
  if( pMod==0 || pMod->pModule->xCreate==0 || pMod->pModule->xDestroy==0 ){

  memset(&sParse, 0, sizeof(sParse));
  sParse.eParseMode = PARSE_MODE_DECLARE_VTAB;
  sParse.db = db;
  sParse.nQueryLoop = 1;
  if( SQLITE_OK==sqlite3RunParser(&sParse, zCreateTable, &zErr)
   && sParse.pNewTable
   && !db->mallocFailed

   && IsOrdinaryTable(sParse.pNewTable)
  ){
    if( !pTab->aCol ){
      Table *pNew = sParse.pNewTable;
      Index *pIdx;
      pTab->aCol = pNew->aCol;
      sqlite3ExprListDelete(db, pNew->u.tab.pDfltList);
      pTab->nNVCol = pTab->nCol = pNew->nCol;
      pTab->tabFlags |= pNew->tabFlags & (TF_WithoutRowid|TF_NoVisibleRowid);
      pNew->nCol = 0;
      pNew->aCol = 0;
      assert( pTab->pIndex==0 );
      assert( HasRowid(pNew) || sqlite3PrimaryKeyIndex(pNew)!=0 );
      if( !HasRowid(pNew)

** This call is a no-op if zTab is not a virtual table.
*/
SQLITE_PRIVATE int sqlite3VtabCallDestroy(sqlite3 *db, int iDb, const char *zTab){
  int rc = SQLITE_OK;
  Table *pTab;

  pTab = sqlite3FindTable(db, zTab, db->aDb[iDb].zDbSName);
  if( pTab!=0 && ALWAYS(pTab->u.vtab.p!=0) ){
    VTable *p;
    int (*xDestroy)(sqlite3_vtab *);
    for(p=pTab->u.vtab.p; p; p=p->pNext){
      assert( p->pVtab );
      if( p->pVtab->nRef>0 ){
        return SQLITE_LOCKED;
      }
    }
    p = vtabDisconnectAll(db, pTab);
    xDestroy = p->pMod->pModule->xDestroy;
    if( xDestroy==0 ) xDestroy = p->pMod->pModule->xDisconnect;
    assert( xDestroy!=0 );
    pTab->nTabRef++;
    rc = xDestroy(p->pVtab);
    /* Remove the sqlite3_vtab* from the aVTrans[] array, if applicable */
    if( rc==SQLITE_OK ){
      assert( pTab->u.vtab.p==p && p->pNext==0 );
      p->pVtab = 0;
      pTab->u.vtab.p = 0;
      sqlite3VtabUnlock(p);
    }
    sqlite3DeleteTable(db, pTab);
  }

  return rc;
}

  pTab->zName = sqlite3DbStrDup(db, pMod->zName);
  if( pTab->zName==0 ){
    sqlite3DbFree(db, pTab);
    return 0;
  }
  pMod->pEpoTab = pTab;
  pTab->nTabRef = 1;
  pTab->eTabType = TABTYP_VTAB;
  pTab->pSchema = db->aDb[0].pSchema;
  assert( pTab->u.vtab.nArg==0 );
  pTab->iPKey = -1;
  pTab->tabFlags |= TF_Eponymous;
  addModuleArgument(pParse, pTab, sqlite3DbStrDup(db, pTab->zName));
  addModuleArgument(pParse, pTab, 0);
  addModuleArgument(pParse, pTab, sqlite3DbStrDup(db, pTab->zName));
  rc = vtabCallConstructor(db, pTab, pMod, pModule->xConnect, &zErr);
  if( rc ){

/*
** Return the name of the i-th column of the pIdx index.
*/
static const char *explainIndexColumnName(Index *pIdx, int i){
  i = pIdx->aiColumn[i];
  if( i==XN_EXPR ) return "<expr>";
  if( i==XN_ROWID ) return "rowid";
  return pIdx->pTable->aCol[i].zCnName;
}

/*
** This routine is a helper for explainIndexRange() below
**
** pStr holds the text of an expression that we are building up one term
** at a time.  This routine adds a new term to the end of the expression.

      assert( aColExpr->a[iIdxCol].pExpr!=0 );
      x.pIdxExpr = aColExpr->a[iIdxCol].pExpr;
      if( sqlite3ExprIsConstant(x.pIdxExpr) ) continue;
      w.xExprCallback = whereIndexExprTransNode;
#ifndef SQLITE_OMIT_GENERATED_COLUMNS
    }else if( iRef>=0
       && (pTab->aCol[iRef].colFlags & COLFLAG_VIRTUAL)!=0
       && ((pTab->aCol[iRef].colFlags & COLFLAG_HASCOLL)==0
           || sqlite3StrICmp(sqlite3ColumnColl(&pTab->aCol[iRef]),
                                               sqlite3StrBINARY)==0)
    ){
      /* Check to see if there are direct references to generated columns
      ** that are contained in the index.  Pulling the generated column
      ** out of the index is an optimization only - the main table is always
      ** available if the index cannot be used.  To avoid unnecessary
      ** complication, omit this optimization if the collating sequence for
      ** the column is non-standard */

      pNew->wtFlags |= exprCommute(pParse, pDup);
      pNew->leftCursor = aiCurCol[0];
      pNew->u.x.leftColumn = aiCurCol[1];
      testcase( (prereqLeft | extraRight) != prereqLeft );
      pNew->prereqRight = prereqLeft | extraRight;
      pNew->prereqAll = prereqAll;
      pNew->eOperator = (operatorMask(pDup->op) + eExtraOp) & opMask;
    }else
    if( op==TK_ISNULL
     && !ExprHasProperty(pExpr,EP_FromJoin)
     && 0==sqlite3ExprCanBeNull(pLeft)
    ){
      pExpr->op = TK_TRUEFALSE;
      pExpr->u.zToken = "false";
      ExprSetProperty(pExpr, EP_IsFalse);
      pTerm->prereqAll = 0;
      pTerm->eOperator = 0;
    }
  }

      int iCol = pTerm->u.x.leftColumn;
      Bitmask cMask = iCol>=BMS ? MASKBIT(BMS-1) : MASKBIT(iCol);
      testcase( iCol==BMS );
      testcase( iCol==BMS-1 );
      if( !sentWarning ){
        sqlite3_log(SQLITE_WARNING_AUTOINDEX,
            "automatic index on %s(%s)", pTable->zName,
            pTable->aCol[iCol].zCnName);
        sentWarning = 1;
      }
      if( (idxCols & cMask)==0 ){
        if( whereLoopResize(pParse->db, pLoop, nKeyCol+1) ){
          goto end_auto_index_create;
        }
        pLoop->aLTerm[nKeyCol++] = pTerm;

  SrcList *pTabList;          /* The FROM clause */
  SrcItem *pSrc;              /* The FROM clause btree term to add */
  WhereLoop *pNew;            /* Template WhereLoop object */
  int rc = SQLITE_OK;         /* Return code */
  int iSortIdx = 1;           /* Index number */
  int b;                      /* A boolean value */
  LogEst rSize;               /* number of rows in the table */

  WhereClause *pWC;           /* The parsed WHERE clause */
  Table *pTab;                /* Table being queried */

  pNew = pBuilder->pNew;
  pWInfo = pBuilder->pWInfo;
  pTabList = pWInfo->pTabList;
  pSrc = pTabList->a + pNew->iTab;

      /* The real indices of the table are only considered if the
      ** NOT INDEXED qualifier is omitted from the FROM clause */
      sPk.pNext = pFirst;
    }
    pProbe = &sPk;
  }
  rSize = pTab->nRowLogEst;


#ifndef SQLITE_OMIT_AUTOMATIC_INDEX
  /* Automatic indexes */
  if( !pBuilder->pOrSet      /* Not part of an OR optimization */
   && (pWInfo->wctrlFlags & WHERE_OR_SUBCLAUSE)==0
   && (pWInfo->pParse->db->flags & SQLITE_AutoIndex)!=0
   && !pSrc->fg.isIndexedBy  /* Has no INDEXED BY clause */
   && !pSrc->fg.notIndexed   /* Has no NOT INDEXED clause */
   && HasRowid(pTab)         /* Not WITHOUT ROWID table. (FIXME: Why not?) */
   && !pSrc->fg.isCorrelated /* Not a correlated subquery */
   && !pSrc->fg.isRecursive  /* Not a recursive common table expression. */
  ){
    /* Generate auto-index WhereLoops */
    LogEst rLogSize;         /* Logarithm of the number of rows in the table */
    WhereTerm *pTerm;
    WhereTerm *pWCEnd = pWC->a + pWC->nTerm;
    rLogSize = estLog(rSize);
    for(pTerm=pWC->a; rc==SQLITE_OK && pTerm<pWCEnd; pTerm++){
      if( pTerm->prereqRight & pNew->maskSelf ) continue;
      if( termCanDriveIndex(pTerm, pSrc, 0) ){
        pNew->u.btree.nEq = 1;
        pNew->nSkip = 0;
        pNew->u.btree.pIndex = 0;
        pNew->nLTerm = 1;
        pNew->aLTerm[0] = pTerm;
        /* TUNING: One-time cost for computing the automatic index is
        ** estimated to be X*N*log2(N) where N is the number of rows in
        ** the table being indexed and where X is 7 (LogEst=28) for normal
        ** tables or 0.5 (LogEst=-10) for views and subqueries.  The value
        ** of X is smaller for views and subqueries so that the query planner
        ** will be more aggressive about generating automatic indexes for
        ** those objects, since there is no opportunity to add schema
        ** indexes on subqueries and views. */
        pNew->rSetup = rLogSize + rSize;
        if( !IsView(pTab) && (pTab->tabFlags & TF_Ephemeral)==0 ){
          pNew->rSetup += 28;
        }else{
          pNew->rSetup -= 10;
        }
        ApplyCostMultiplier(pNew->rSetup, pTab->costMult);
        if( pNew->rSetup<0 ) pNew->rSetup = 0;
        /* TUNING: Each index lookup yields 20 rows in the table.  This

    int iDb;         /* Index of database containing table/index */
    SrcItem *pTabItem;

    pTabItem = &pTabList->a[pLevel->iFrom];
    pTab = pTabItem->pTab;
    iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
    pLoop = pLevel->pWLoop;
    if( (pTab->tabFlags & TF_Ephemeral)!=0 || IsView(pTab) ){
      /* Do nothing */
    }else
#ifndef SQLITE_OMIT_VIRTUALTABLE
    if( (pLoop->wsFlags & WHERE_VIRTUALTABLE)!=0 ){
      const char *pVTab = (const char *)sqlite3GetVTable(db, pTab);
      int iCur = pTabItem->iCursor;
      sqlite3VdbeAddOp4(v, OP_VOpen, iCur, 0, 0, pVTab, P4_VTAB);

#ifdef SQLITE_ENABLE_EARLY_CURSOR_CLOSE
    /* Close all of the cursors that were opened by sqlite3WhereBegin.
    ** Except, do not close cursors that will be reused by the OR optimization
    ** (WHERE_OR_SUBCLAUSE).  And do not close the OP_OpenWrite cursors
    ** created for the ONEPASS optimization.
    */
    if( (pTab->tabFlags & TF_Ephemeral)==0
     && !IsView(pTab)
     && (pWInfo->wctrlFlags & WHERE_OR_SUBCLAUSE)==0
    ){
      int ws = pLoop->wsFlags;
      if( pWInfo->eOnePass==ONEPASS_OFF && (ws & WHERE_IDX_ONLY)==0 ){
        sqlite3VdbeAddOp1(v, OP_Close, pTabItem->iCursor);
      }
      if( (ws & WHERE_INDEXED)!=0

  }else{
    yymsp[-1].minor.yy376 = 0;
    sqlite3ErrorMsg(pParse, "unknown table option: %.*s", yymsp[0].minor.yy0.n, yymsp[0].minor.yy0.z);
  }
}
        break;
      case 23: /* columnname ::= nm typetoken */
{sqlite3AddColumn(pParse,yymsp[-1].minor.yy0,yymsp[0].minor.yy0);}
        break;
      case 24: /* typetoken ::= */
      case 63: /* conslist_opt ::= */ yytestcase(yyruleno==63);
      case 102: /* as ::= */ yytestcase(yyruleno==102);
{yymsp[1].minor.yy0.n = 0; yymsp[1].minor.yy0.z = 0;}
        break;
      case 25: /* typetoken ::= typename LP signed RP */

  rc = sqlite3Init(db, &zErrMsg);
  if( SQLITE_OK!=rc ){
    goto error_out;
  }

  /* Locate the table in question */
  pTab = sqlite3FindTable(db, zTableName, zDbName);
  if( !pTab || IsView(pTab) ){
    pTab = 0;
    goto error_out;
  }

  /* Find the column for which info is requested */
  if( zColumnName==0 ){
    /* Query for existance of table only */
  }else{
    for(iCol=0; iCol<pTab->nCol; iCol++){
      pCol = &pTab->aCol[iCol];
      if( 0==sqlite3StrICmp(pCol->zCnName, zColumnName) ){
        break;
      }
    }
    if( iCol==pTab->nCol ){
      if( HasRowid(pTab) && sqlite3IsRowid(zColumnName) ){
        iCol = pTab->iPKey;
        pCol = iCol>=0 ? &pTab->aCol[iCol] : 0;

  **        and there is no explicitly declared IPK column.
  **
  **     2. The table is not a view and the column name identified an
  **        explicitly declared column. Copy meta information from *pCol.
  */
  if( pCol ){
    zDataType = sqlite3ColumnType(pCol,0);
    zCollSeq = sqlite3ColumnColl(pCol);
    notnull = pCol->notNull!=0;
    primarykey  = (pCol->colFlags & COLFLAG_PRIMKEY)!=0;
    autoinc = pTab->iPKey==iCol && (pTab->tabFlags & TF_Autoincrement)!=0;
  }else{
    zDataType = "INTEGER";
    primarykey = 1;
  }

  *peType = RBU_PK_NOTABLE;
  *piPk = 0;

  assert( p->rc==SQLITE_OK );
  p->rc = prepareFreeAndCollectError(p->dbMain, &aStmt[0], &p->zErrmsg,
    sqlite3_mprintf(
          "SELECT "
          " (sql COLLATE nocase BETWEEN 'CREATE VIRTUAL' AND 'CREATE VIRTUAM'),"
          " rootpage"
          "  FROM sqlite_schema"
          " WHERE name=%Q", zTab
  ));
  if( p->rc!=SQLITE_OK || sqlite3_step(aStmt[0])!=SQLITE_ROW ){
    /* Either an error, or no such table. */
    goto rbuTableType_end;
  }

        break;

      case RBU_STATE_COOKIE:
        pRet->iCookie = (u32)sqlite3_column_int64(pStmt, 1);
        break;

      case RBU_STATE_OALSZ:
        pRet->iOalSz = sqlite3_column_int64(pStmt, 1);
        break;

      case RBU_STATE_PHASEONESTEP:
        pRet->nPhaseOneStep = sqlite3_column_int64(pStmt, 1);
        break;

      case RBU_STATE_DATATBL:

static void fts5SourceIdFunc(
  sqlite3_context *pCtx,          /* Function call context */
  int nArg,                       /* Number of args */
  sqlite3_value **apUnused        /* Function arguments */
){
  assert( nArg==0 );
  UNUSED_PARAM2(nArg, apUnused);
  sqlite3_result_text(pCtx, "fts5: 2021-08-06 20:17:39 087b8b41c6ed76b55c11315e7e95679d67590be20ae21108b593d00bb7d1c57a", -1, SQLITE_TRANSIENT);
}

/*
** Return true if zName is the extension on one of the shadow tables used
** by this module.
*/
static int fts5ShadowName(const char *zName){

**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.37.0"
#define SQLITE_VERSION_NUMBER 3037000
#define SQLITE_SOURCE_ID      "2021-08-06 20:17:39 087b8b41c6ed76b55c11315e7e95679d67590be20ae21108b593d00bb7d1c57a"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros