**     CREATE INDEX
**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**
** $Id: build.c,v 1.419 2007/04/05 11:25:58 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Initialize the pParse structure as needed.
................................................................................
** Table.  No changes are made to disk by this routine.
**
** This routine just deletes the data structure.  It does not unlink
** the table data structure from the hash table.  Nor does it remove
** foreign keys from the sqlite.aFKey hash table.  But it does destroy
** memory structures of the indices and foreign keys associated with 
** the table.
**
** Indices associated with the table are unlinked from the "db"
** data structure if db!=NULL.  If db==NULL, indices attached to
** the table are deleted, but it is assumed they have already been
** unlinked.
*/
void sqlite3DeleteTable(sqlite3 *db, Table *pTable){
  Index *pIndex, *pNext;
  FKey *pFKey, *pNextFKey;

  db = 0;

  if( pTable==0 ) return;

  /* Do not delete the table until the reference count reaches zero. */
  pTable->nRef--;
  if( pTable->nRef>0 ){
    return;
  }
................................................................................
    pNext = pIndex->pNext;
    assert( pIndex->pSchema==pTable->pSchema );
    sqliteDeleteIndex(pIndex);
  }

#ifndef SQLITE_OMIT_FOREIGN_KEY
  /* Delete all foreign keys associated with this table.  The keys
  ** should have already been unlinked from the db->aFKey hash table 
  */
  for(pFKey=pTable->pFKey; pFKey; pFKey=pNextFKey){
    pNextFKey = pFKey->pNextFrom;
    assert( sqlite3HashFind(&pTable->pSchema->aFKey,
                           pFKey->zTo, strlen(pFKey->zTo)+1)!=pFKey );
    sqliteFree(pFKey);
  }
................................................................................
        while( pF2 && pF2->pNextTo!=pF1 ){ pF2=pF2->pNextTo; }
        if( pF2 ){
          pF2->pNextTo = pF1->pNextTo;
        }
      }
    }
#endif
    sqlite3DeleteTable(db, p);
  }
  db->flags |= SQLITE_InternChanges;
}

/*
** Given a token, return a string that consists of the text of that
** token with any quotations removed.  Space to hold the returned string
................................................................................
    pParse->nErr++;
    goto begin_table_error;
  }
  pTable->zName = zName;
  pTable->iPKey = -1;
  pTable->pSchema = db->aDb[iDb].pSchema;
  pTable->nRef = 1;
  if( pParse->pNewTable ) sqlite3DeleteTable(db, pParse->pNewTable);
  pParse->pNewTable = pTable;

  /* If this is the magic sqlite_sequence table used by autoincrement,
  ** then record a pointer to this table in the main database structure
  ** so that INSERT can find the table easily.
  */
#ifndef SQLITE_OMIT_AUTOINCREMENT
................................................................................
        pSelTab = sqlite3ResultSetOfSelect(pParse, 0, pSelect);
        if( pSelTab==0 ) return;
        assert( p->aCol==0 );
        p->nCol = pSelTab->nCol;
        p->aCol = pSelTab->aCol;
        pSelTab->nCol = 0;
        pSelTab->aCol = 0;
        sqlite3DeleteTable(0, pSelTab);
      }
    }

    /* Compute the complete text of the CREATE statement */
    if( pSelect ){
      zStmt = createTableStmt(p, p->pSchema==pParse->db->aDb[1].pSchema);
    }else{
................................................................................
    pParse->nTab = n;
    if( pSelTab ){
      assert( pTable->aCol==0 );
      pTable->nCol = pSelTab->nCol;
      pTable->aCol = pSelTab->aCol;
      pSelTab->nCol = 0;
      pSelTab->aCol = 0;
      sqlite3DeleteTable(0, pSelTab);
      pTable->pSchema->flags |= DB_UnresetViews;
    }else{
      pTable->nCol = 0;
      nErr++;
    }
    sqlite3SelectDelete(pSel);
  } else {
................................................................................
  int i;
  struct SrcList_item *pItem;
  if( pList==0 ) return;
  for(pItem=pList->a, i=0; i<pList->nSrc; i++, pItem++){
    sqliteFree(pItem->zDatabase);
    sqliteFree(pItem->zName);
    sqliteFree(pItem->zAlias);
    sqlite3DeleteTable(0, pItem->pTab);
    sqlite3SelectDelete(pItem->pSelect);
    sqlite3ExprDelete(pItem->pOn);
    sqlite3IdListDelete(pItem->pUsing);
  }
  sqliteFree(pList);
}

**     CREATE INDEX
**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**
** $Id: build.c,v 1.420 2007/04/16 15:06:25 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Initialize the pParse structure as needed.
................................................................................
** Table.  No changes are made to disk by this routine.
**
** This routine just deletes the data structure.  It does not unlink
** the table data structure from the hash table.  Nor does it remove
** foreign keys from the sqlite.aFKey hash table.  But it does destroy
** memory structures of the indices and foreign keys associated with 
** the table.





*/
void sqlite3DeleteTable(Table *pTable){
  Index *pIndex, *pNext;
  FKey *pFKey, *pNextFKey;



  if( pTable==0 ) return;

  /* Do not delete the table until the reference count reaches zero. */
  pTable->nRef--;
  if( pTable->nRef>0 ){
    return;
  }
................................................................................
    pNext = pIndex->pNext;
    assert( pIndex->pSchema==pTable->pSchema );
    sqliteDeleteIndex(pIndex);
  }

#ifndef SQLITE_OMIT_FOREIGN_KEY
  /* Delete all foreign keys associated with this table.  The keys
  ** should have already been unlinked from the pSchema->aFKey hash table 
  */
  for(pFKey=pTable->pFKey; pFKey; pFKey=pNextFKey){
    pNextFKey = pFKey->pNextFrom;
    assert( sqlite3HashFind(&pTable->pSchema->aFKey,
                           pFKey->zTo, strlen(pFKey->zTo)+1)!=pFKey );
    sqliteFree(pFKey);
  }
................................................................................
        while( pF2 && pF2->pNextTo!=pF1 ){ pF2=pF2->pNextTo; }
        if( pF2 ){
          pF2->pNextTo = pF1->pNextTo;
        }
      }
    }
#endif
    sqlite3DeleteTable(p);
  }
  db->flags |= SQLITE_InternChanges;
}

/*
** Given a token, return a string that consists of the text of that
** token with any quotations removed.  Space to hold the returned string
................................................................................
    pParse->nErr++;
    goto begin_table_error;
  }
  pTable->zName = zName;
  pTable->iPKey = -1;
  pTable->pSchema = db->aDb[iDb].pSchema;
  pTable->nRef = 1;
  if( pParse->pNewTable ) sqlite3DeleteTable(pParse->pNewTable);
  pParse->pNewTable = pTable;

  /* If this is the magic sqlite_sequence table used by autoincrement,
  ** then record a pointer to this table in the main database structure
  ** so that INSERT can find the table easily.
  */
#ifndef SQLITE_OMIT_AUTOINCREMENT
................................................................................
        pSelTab = sqlite3ResultSetOfSelect(pParse, 0, pSelect);
        if( pSelTab==0 ) return;
        assert( p->aCol==0 );
        p->nCol = pSelTab->nCol;
        p->aCol = pSelTab->aCol;
        pSelTab->nCol = 0;
        pSelTab->aCol = 0;
        sqlite3DeleteTable(pSelTab);
      }
    }

    /* Compute the complete text of the CREATE statement */
    if( pSelect ){
      zStmt = createTableStmt(p, p->pSchema==pParse->db->aDb[1].pSchema);
    }else{
................................................................................
    pParse->nTab = n;
    if( pSelTab ){
      assert( pTable->aCol==0 );
      pTable->nCol = pSelTab->nCol;
      pTable->aCol = pSelTab->aCol;
      pSelTab->nCol = 0;
      pSelTab->aCol = 0;
      sqlite3DeleteTable(pSelTab);
      pTable->pSchema->flags |= DB_UnresetViews;
    }else{
      pTable->nCol = 0;
      nErr++;
    }
    sqlite3SelectDelete(pSel);
  } else {
................................................................................
  int i;
  struct SrcList_item *pItem;
  if( pList==0 ) return;
  for(pItem=pList->a, i=0; i<pList->nSrc; i++, pItem++){
    sqliteFree(pItem->zDatabase);
    sqliteFree(pItem->zName);
    sqliteFree(pItem->zAlias);
    sqlite3DeleteTable(pItem->pTab);
    sqlite3SelectDelete(pItem->pSelect);
    sqlite3ExprDelete(pItem->pOn);
    sqlite3IdListDelete(pItem->pUsing);
  }
  sqliteFree(pList);
}

**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains functions used to access the internal hash tables
** of user defined functions and collation sequences.
**
** $Id: callback.c,v 1.16 2007/02/02 12:44:37 drh Exp $
*/

#include "sqliteInt.h"

/*
** Invoke the 'collation needed' callback to request a collation sequence
** in the database text encoding of name zName, length nName.
................................................................................
  for(pElem=sqliteHashFirst(&temp2); pElem; pElem=sqliteHashNext(pElem)){
    sqlite3DeleteTrigger((Trigger*)sqliteHashData(pElem));
  }
  sqlite3HashClear(&temp2);
  sqlite3HashInit(&pSchema->tblHash, SQLITE_HASH_STRING, 0);
  for(pElem=sqliteHashFirst(&temp1); pElem; pElem=sqliteHashNext(pElem)){
    Table *pTab = sqliteHashData(pElem);
    sqlite3DeleteTable(0, pTab);
  }
  sqlite3HashClear(&temp1);
  pSchema->pSeqTab = 0;
  pSchema->flags &= ~DB_SchemaLoaded;
}

/*

**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains functions used to access the internal hash tables
** of user defined functions and collation sequences.
**
** $Id: callback.c,v 1.17 2007/04/16 15:06:25 danielk1977 Exp $
*/

#include "sqliteInt.h"

/*
** Invoke the 'collation needed' callback to request a collation sequence
** in the database text encoding of name zName, length nName.
................................................................................
  for(pElem=sqliteHashFirst(&temp2); pElem; pElem=sqliteHashNext(pElem)){
    sqlite3DeleteTrigger((Trigger*)sqliteHashData(pElem));
  }
  sqlite3HashClear(&temp2);
  sqlite3HashInit(&pSchema->tblHash, SQLITE_HASH_STRING, 0);
  for(pElem=sqliteHashFirst(&temp1); pElem; pElem=sqliteHashNext(pElem)){
    Table *pTab = sqliteHashData(pElem);
    sqlite3DeleteTable(pTab);
  }
  sqlite3HashClear(&temp1);
  pSchema->pSeqTab = 0;
  pSchema->flags &= ~DB_SchemaLoaded;
}

/*

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.128 2007/02/07 01:06:53 drh Exp $
*/
#include "sqliteInt.h"

/*
** Look up every table that is named in pSrc.  If any table is not found,
** add an error message to pParse->zErrMsg and return NULL.  If all tables
** are found, return a pointer to the last table.
................................................................................
*/
Table *sqlite3SrcListLookup(Parse *pParse, SrcList *pSrc){
  Table *pTab = 0;
  int i;
  struct SrcList_item *pItem;
  for(i=0, pItem=pSrc->a; i<pSrc->nSrc; i++, pItem++){
    pTab = sqlite3LocateTable(pParse, pItem->zName, pItem->zDatabase);
    sqlite3DeleteTable(pParse->db, pItem->pTab);
    pItem->pTab = pTab;
    if( pTab ){
      pTab->nRef++;
    }
  }
  return pTab;
}

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.129 2007/04/16 15:06:25 danielk1977 Exp $
*/
#include "sqliteInt.h"

/*
** Look up every table that is named in pSrc.  If any table is not found,
** add an error message to pParse->zErrMsg and return NULL.  If all tables
** are found, return a pointer to the last table.
................................................................................
*/
Table *sqlite3SrcListLookup(Parse *pParse, SrcList *pSrc){
  Table *pTab = 0;
  int i;
  struct SrcList_item *pItem;
  for(i=0, pItem=pSrc->a; i<pSrc->nSrc; i++, pItem++){
    pTab = sqlite3LocateTable(pParse, pItem->zName, pItem->zDatabase);
    sqlite3DeleteTable(pItem->pTab);
    pItem->pTab = pTab;
    if( pTab ){
      pTab->nRef++;
    }
  }
  return pTab;
}

**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.368 2007/04/02 16:40:38 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** The version of the library
................................................................................
#ifdef SQLITE_SSE
  {
    extern void sqlite3SseCleanup(sqlite3*);
    sqlite3SseCleanup(db);
  }
#endif 

  /* If there are any outstanding VMs, return SQLITE_BUSY. */
  sqlite3ResetInternalSchema(db, 0);


  if( db->pVdbe ){
    sqlite3Error(db, SQLITE_BUSY, 
        "Unable to close due to unfinalised statements");
    return SQLITE_BUSY;
  }
  assert( !sqlite3SafetyCheck(db) );

**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.369 2007/04/16 15:06:25 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** The version of the library
................................................................................
#ifdef SQLITE_SSE
  {
    extern void sqlite3SseCleanup(sqlite3*);
    sqlite3SseCleanup(db);
  }
#endif 


  sqlite3ResetInternalSchema(db, 0);

  /* If there are any outstanding VMs, return SQLITE_BUSY. */
  if( db->pVdbe ){
    sqlite3Error(db, SQLITE_BUSY, 
        "Unable to close due to unfinalised statements");
    return SQLITE_BUSY;
  }
  assert( !sqlite3SafetyCheck(db) );

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.336 2007/04/13 16:06:33 drh Exp $
*/
#include "sqliteInt.h"


/*
** Delete all the content of a Select structure but do not deallocate
** the select structure itself.
................................................................................
    }else{
      /* If all else fails, make up a name */
      zName = sqlite3MPrintf("column%d", i+1);
    }
    sqlite3Dequote(zName);
    if( sqlite3MallocFailed() ){
      sqliteFree(zName);
      sqlite3DeleteTable(0, pTab);
      return 0;
    }

    /* Make sure the column name is unique.  If the name is not unique,
    ** append a integer to the name so that it becomes unique.
    */
    nName = strlen(zName);
................................................................................
  ** elements we are now copying in.
  */
  iParent = pSubitem->iCursor;
  {
    int nSubSrc = pSubSrc->nSrc;
    int jointype = pSubitem->jointype;

    sqlite3DeleteTable(0, pSubitem->pTab);
    sqliteFree(pSubitem->zDatabase);
    sqliteFree(pSubitem->zName);
    sqliteFree(pSubitem->zAlias);
    if( nSubSrc>1 ){
      int extra = nSubSrc - 1;
      for(i=1; i<nSubSrc; i++){
        pSrc = sqlite3SrcListAppend(pSrc, 0, 0);

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.337 2007/04/16 15:06:25 danielk1977 Exp $
*/
#include "sqliteInt.h"


/*
** Delete all the content of a Select structure but do not deallocate
** the select structure itself.
................................................................................
    }else{
      /* If all else fails, make up a name */
      zName = sqlite3MPrintf("column%d", i+1);
    }
    sqlite3Dequote(zName);
    if( sqlite3MallocFailed() ){
      sqliteFree(zName);
      sqlite3DeleteTable(pTab);
      return 0;
    }

    /* Make sure the column name is unique.  If the name is not unique,
    ** append a integer to the name so that it becomes unique.
    */
    nName = strlen(zName);
................................................................................
  ** elements we are now copying in.
  */
  iParent = pSubitem->iCursor;
  {
    int nSubSrc = pSubSrc->nSrc;
    int jointype = pSubitem->jointype;

    sqlite3DeleteTable(pSubitem->pTab);
    sqliteFree(pSubitem->zDatabase);
    sqliteFree(pSubitem->zName);
    sqliteFree(pSubitem->zAlias);
    if( nSubSrc>1 ){
      int extra = nSubSrc - 1;
      for(i=1; i<nSubSrc; i++){
        pSrc = sqlite3SrcListAppend(pSrc, 0, 0);

**    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.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.551 2007/04/12 03:54:39 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_

#if defined(SQLITE_TCL) || defined(TCLSH)
# include <tcl.h>
#endif
................................................................................
  void *pAux;               /* Auxiliary data.  Usually NULL */
  void (*xFreeAux)(void*);  /* Routine to free pAux */
  Schema *pSchema;     /* Pointer to database schema (possibly shared) */
};

/*
** An instance of the following structure stores a database schema.








*/
struct Schema {
  int schema_cookie;   /* Database schema version number for this file */
  Hash tblHash;        /* All tables indexed by name */
  Hash idxHash;        /* All (named) indices indexed by name */
  Hash trigHash;       /* All triggers indexed by name */
  Hash aFKey;          /* Foreign keys indexed by to-table */
  Table *pSeqTab;      /* The sqlite_sequence table used by AUTOINCREMENT */
  u8 file_format;      /* Schema format version for this file */
  u8 enc;              /* Text encoding used by this database */
  u16 flags;           /* Flags associated with this schema */
  int cache_size;      /* Number of pages to use in the cache */



};

/*
** These macros can be used to test, set, or clear bits in the 
** Db.flags field.
*/
#define DbHasProperty(D,I,P)     (((D)->aDb[I].pSchema->flags&(P))==(P))
................................................................................
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
  int sqlite3ViewGetColumnNames(Parse*,Table*);
#else
# define sqlite3ViewGetColumnNames(A,B) 0
#endif

void sqlite3DropTable(Parse*, SrcList*, int, int);
void sqlite3DeleteTable(sqlite3*, Table*);
void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
void *sqlite3ArrayAllocate(void*,int,int,int*,int*,int*);
IdList *sqlite3IdListAppend(IdList*, Token*);
int sqlite3IdListIndex(IdList*,const char*);
SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*);
SrcList *sqlite3SrcListAppendFromTerm(SrcList*, Token*, Token*, Token*,
                                      Select*, Expr*, IdList*);
................................................................................
#else
   void sqlite3VtabClear(Table*);
   int sqlite3VtabSync(sqlite3 *db, int rc);
   int sqlite3VtabRollback(sqlite3 *db);
   int sqlite3VtabCommit(sqlite3 *db);
#endif
void sqlite3VtabLock(sqlite3_vtab*);
void sqlite3VtabUnlock(sqlite3_vtab*);
void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*);
void sqlite3VtabFinishParse(Parse*, Token*);
void sqlite3VtabArgInit(Parse*);
void sqlite3VtabArgExtend(Parse*, Token*);
int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **);
int sqlite3VtabCallConnect(Parse*, Table*);
int sqlite3VtabCallDestroy(sqlite3*, int, const char *);

**    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.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.552 2007/04/16 15:06:25 danielk1977 Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_

#if defined(SQLITE_TCL) || defined(TCLSH)
# include <tcl.h>
#endif
................................................................................
  void *pAux;               /* Auxiliary data.  Usually NULL */
  void (*xFreeAux)(void*);  /* Routine to free pAux */
  Schema *pSchema;     /* Pointer to database schema (possibly shared) */
};

/*
** An instance of the following structure stores a database schema.
**
** If there are no virtual tables configured in this schema, the
** Schema.db variable is set to NULL. After the first virtual table
** has been added, it is set to point to the database connection 
** used to create the connection. Once a virtual table has been
** added to the Schema structure and the Schema.db variable populated, 
** only that database connection may use the Schema to prepare 
** statements.
*/
struct Schema {
  int schema_cookie;   /* Database schema version number for this file */
  Hash tblHash;        /* All tables indexed by name */
  Hash idxHash;        /* All (named) indices indexed by name */
  Hash trigHash;       /* All triggers indexed by name */
  Hash aFKey;          /* Foreign keys indexed by to-table */
  Table *pSeqTab;      /* The sqlite_sequence table used by AUTOINCREMENT */
  u8 file_format;      /* Schema format version for this file */
  u8 enc;              /* Text encoding used by this database */
  u16 flags;           /* Flags associated with this schema */
  int cache_size;      /* Number of pages to use in the cache */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3 *db;         /* "Owner" connection. See comment above */
#endif
};

/*
** These macros can be used to test, set, or clear bits in the 
** Db.flags field.
*/
#define DbHasProperty(D,I,P)     (((D)->aDb[I].pSchema->flags&(P))==(P))
................................................................................
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
  int sqlite3ViewGetColumnNames(Parse*,Table*);
#else
# define sqlite3ViewGetColumnNames(A,B) 0
#endif

void sqlite3DropTable(Parse*, SrcList*, int, int);
void sqlite3DeleteTable(Table*);
void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
void *sqlite3ArrayAllocate(void*,int,int,int*,int*,int*);
IdList *sqlite3IdListAppend(IdList*, Token*);
int sqlite3IdListIndex(IdList*,const char*);
SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*);
SrcList *sqlite3SrcListAppendFromTerm(SrcList*, Token*, Token*, Token*,
                                      Select*, Expr*, IdList*);
................................................................................
#else
   void sqlite3VtabClear(Table*);
   int sqlite3VtabSync(sqlite3 *db, int rc);
   int sqlite3VtabRollback(sqlite3 *db);
   int sqlite3VtabCommit(sqlite3 *db);
#endif
void sqlite3VtabLock(sqlite3_vtab*);
void sqlite3VtabUnlock(sqlite3*, sqlite3_vtab*);
void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*);
void sqlite3VtabFinishParse(Parse*, Token*);
void sqlite3VtabArgInit(Parse*);
void sqlite3VtabArgExtend(Parse*, Token*);
int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **);
int sqlite3VtabCallConnect(Parse*, Table*);
int sqlite3VtabCallDestroy(sqlite3*, int, const char *);

*************************************************************************
** An tokenizer for SQL
**
** This file contains C code that splits an SQL input string up into
** individual tokens and sends those tokens one-by-one over to the
** parser for analysis.
**
** $Id: tokenize.c,v 1.125 2007/01/26 19:31:01 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include <stdlib.h>

/*
................................................................................
#endif

  if( !IN_DECLARE_VTAB ){
    /* If the pParse->declareVtab flag is set, do not delete any table 
    ** structure built up in pParse->pNewTable. The calling code (see vtab.c)
    ** will take responsibility for freeing the Table structure.
    */
    sqlite3DeleteTable(pParse->db, pParse->pNewTable);
  }

  sqlite3DeleteTrigger(pParse->pNewTrigger);
  sqliteFree(pParse->apVarExpr);
  if( nErr>0 && (pParse->rc==SQLITE_OK || pParse->rc==SQLITE_DONE) ){
    pParse->rc = SQLITE_ERROR;
  }
  return nErr;
}

*************************************************************************
** An tokenizer for SQL
**
** This file contains C code that splits an SQL input string up into
** individual tokens and sends those tokens one-by-one over to the
** parser for analysis.
**
** $Id: tokenize.c,v 1.126 2007/04/16 15:06:25 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include <stdlib.h>

/*
................................................................................
#endif

  if( !IN_DECLARE_VTAB ){
    /* If the pParse->declareVtab flag is set, do not delete any table 
    ** structure built up in pParse->pNewTable. The calling code (see vtab.c)
    ** will take responsibility for freeing the Table structure.
    */
    sqlite3DeleteTable(pParse->pNewTable);
  }

  sqlite3DeleteTrigger(pParse->pNewTrigger);
  sqliteFree(pParse->apVarExpr);
  if( nErr>0 && (pParse->rc==SQLITE_OK || pParse->rc==SQLITE_DONE) ){
    pParse->rc = SQLITE_ERROR;
  }
  return nErr;
}

**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.598 2007/03/30 18:42:56 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
................................................................................
    for(i = 0; i<nArg; i++, pX++){
      storeTypeInfo(pX, 0);
      apArg[i] = pX;
    }
    if( sqlite3SafetyOff(db) ) goto abort_due_to_misuse;
    sqlite3VtabLock(pVtab);
    rc = pModule->xUpdate(pVtab, nArg, apArg, &rowid);
    sqlite3VtabUnlock(pVtab);
    if( sqlite3SafetyOn(db) ) goto abort_due_to_misuse;
    if( pOp->p1 && rc==SQLITE_OK ){
      assert( nArg>1 && apArg[0] && (apArg[0]->flags&MEM_Null) );
      db->lastRowid = rowid;
    }
  }
  popStack(&pTos, nArg);

**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.599 2007/04/16 15:06:25 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
................................................................................
    for(i = 0; i<nArg; i++, pX++){
      storeTypeInfo(pX, 0);
      apArg[i] = pX;
    }
    if( sqlite3SafetyOff(db) ) goto abort_due_to_misuse;
    sqlite3VtabLock(pVtab);
    rc = pModule->xUpdate(pVtab, nArg, apArg, &rowid);
    sqlite3VtabUnlock(db, pVtab);
    if( sqlite3SafetyOn(db) ) goto abort_due_to_misuse;
    if( pOp->p1 && rc==SQLITE_OK ){
      assert( nArg>1 && apArg[0] && (apArg[0]->flags&MEM_Null) );
      db->lastRowid = rowid;
    }
  }
  popStack(&pTos, nArg);

**    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 code used to help implement virtual tables.
**
** $Id: vtab.c,v 1.39 2007/01/09 14:01:14 drh Exp $
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#include "sqliteInt.h"

/*
** External API function used to create a new virtual-table module.
*/
................................................................................
  pVtab->nRef++;
}

/*
** Unlock a virtual table.  When the last lock is removed,
** disconnect the virtual table.
*/
void sqlite3VtabUnlock(sqlite3_vtab *pVtab){
  pVtab->nRef--;


  if( pVtab->nRef==0 ){


    pVtab->pModule->xDisconnect(pVtab);




  }
}

/*
** Clear any and all virtual-table information from the Table record.
** This routine is called, for example, just before deleting the Table
** record.
*/
void sqlite3VtabClear(Table *p){
  sqlite3_vtab *pVtab = p->pVtab;
  if( pVtab ){
    assert( p->pMod && p->pMod->pModule );
    sqlite3VtabUnlock(pVtab);
    p->pVtab = 0;
  }
  if( p->azModuleArg ){
    int i;
    for(i=0; i<p->nModuleArg; i++){
      sqliteFree(p->azModuleArg[i]);
    }
................................................................................
    const char *zName = pTab->zName;
    int nName = strlen(zName) + 1;
    pOld = sqlite3HashInsert(&pSchema->tblHash, zName, nName, pTab);
    if( pOld ){
      assert( pTab==pOld );  /* Malloc must have failed inside HashInsert() */
      return;
    }

    pParse->pNewTable = 0;
  }
}

/*
** The parser calls this routine when it sees the first token
** of an argument to the module name in a CREATE VIRTUAL TABLE statement.
................................................................................
    sqlite3Error(db, SQLITE_ERROR, zErr);
    sqliteFree(zErr);
    rc = SQLITE_ERROR;
  }
  sParse.declareVtab = 0;

  sqlite3_finalize((sqlite3_stmt*)sParse.pVdbe);
  sqlite3DeleteTable(0, sParse.pNewTable);
  sParse.pNewTable = 0;
  db->pVTab = 0;

  assert( (rc&0xff)==rc );
  return rc;
}

................................................................................
static void callFinaliser(sqlite3 *db, int offset){
  int i;
  for(i=0; i<db->nVTrans && db->aVTrans[i]; i++){
    sqlite3_vtab *pVtab = db->aVTrans[i];
    int (*x)(sqlite3_vtab *);
    x = *(int (**)(sqlite3_vtab *))((char *)pVtab->pModule + offset);
    if( x ) x(pVtab);
    sqlite3VtabUnlock(pVtab);
  }
  sqliteFree(db->aVTrans);
  db->nVTrans = 0;
  db->aVTrans = 0;
}

/*

**    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 code used to help implement virtual tables.
**
** $Id: vtab.c,v 1.40 2007/04/16 15:06:26 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#include "sqliteInt.h"

/*
** External API function used to create a new virtual-table module.
*/
................................................................................
  pVtab->nRef++;
}

/*
** Unlock a virtual table.  When the last lock is removed,
** disconnect the virtual table.
*/
void sqlite3VtabUnlock(sqlite3 *db, sqlite3_vtab *pVtab){
  pVtab->nRef--;
  assert(db);
  assert(!sqlite3SafetyCheck(db));
  if( pVtab->nRef==0 ){
    if( db->magic==SQLITE_MAGIC_BUSY ){
      sqlite3SafetyOff(db);
      pVtab->pModule->xDisconnect(pVtab);
      sqlite3SafetyOn(db);
    } else {
      pVtab->pModule->xDisconnect(pVtab);
    }
  }
}

/*
** Clear any and all virtual-table information from the Table record.
** This routine is called, for example, just before deleting the Table
** record.
*/
void sqlite3VtabClear(Table *p){
  sqlite3_vtab *pVtab = p->pVtab;
  if( pVtab ){
    assert( p->pMod && p->pMod->pModule );
    sqlite3VtabUnlock(p->pSchema->db, pVtab);
    p->pVtab = 0;
  }
  if( p->azModuleArg ){
    int i;
    for(i=0; i<p->nModuleArg; i++){
      sqliteFree(p->azModuleArg[i]);
    }
................................................................................
    const char *zName = pTab->zName;
    int nName = strlen(zName) + 1;
    pOld = sqlite3HashInsert(&pSchema->tblHash, zName, nName, pTab);
    if( pOld ){
      assert( pTab==pOld );  /* Malloc must have failed inside HashInsert() */
      return;
    }
    pSchema->db = pParse->db;
    pParse->pNewTable = 0;
  }
}

/*
** The parser calls this routine when it sees the first token
** of an argument to the module name in a CREATE VIRTUAL TABLE statement.
................................................................................
    sqlite3Error(db, SQLITE_ERROR, zErr);
    sqliteFree(zErr);
    rc = SQLITE_ERROR;
  }
  sParse.declareVtab = 0;

  sqlite3_finalize((sqlite3_stmt*)sParse.pVdbe);
  sqlite3DeleteTable(sParse.pNewTable);
  sParse.pNewTable = 0;
  db->pVTab = 0;

  assert( (rc&0xff)==rc );
  return rc;
}

................................................................................
static void callFinaliser(sqlite3 *db, int offset){
  int i;
  for(i=0; i<db->nVTrans && db->aVTrans[i]; i++){
    sqlite3_vtab *pVtab = db->aVTrans[i];
    int (*x)(sqlite3_vtab *);
    x = *(int (**)(sqlite3_vtab *))((char *)pVtab->pModule + offset);
    if( x ) x(pVtab);
    sqlite3VtabUnlock(db, pVtab);
  }
  sqliteFree(db->aVTrans);
  db->nVTrans = 0;
  db->aVTrans = 0;
}

/*

#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file inserting into virtual tables from a SELECT
# statement.
#
# $Id: vtab9.test,v 1.1 2006/08/29 18:46:14 drh Exp $

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

ifcapable !vtab {
  finish_test
  return
................................................................................
    INSERT INTO d1 VALUES('a','b','c');
    INSERT INTO d1 VALUES(NULL,'x',123.456);
    INSERT INTO d1 VALUES(x'6869',123456789,-12345);
    INSERT INTO t3(a,b,c) SELECT * FROM d1;
    SELECT rowid, * FROM t3;
  }
} {1 1 2 3 2 a b c 3 {} x 123.456 4 hi 123456789 -12345}





















unset -nocomplain echo_module_begin_fail
finish_test

#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file inserting into virtual tables from a SELECT
# statement.
#
# $Id: vtab9.test,v 1.2 2007/04/16 15:06:26 danielk1977 Exp $

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

ifcapable !vtab {
  finish_test
  return
................................................................................
    INSERT INTO d1 VALUES('a','b','c');
    INSERT INTO d1 VALUES(NULL,'x',123.456);
    INSERT INTO d1 VALUES(x'6869',123456789,-12345);
    INSERT INTO t3(a,b,c) SELECT * FROM d1;
    SELECT rowid, * FROM t3;
  }
} {1 1 2 3 2 a b c 3 {} x 123.456 4 hi 123456789 -12345}

# do_test vtab9-2.1 {
#   execsql {
#     CREATE TABLE t4(a);
#     CREATE VIRTUAL TABLE t5 USING echo(t4);
#     INSERT INTO t4 VALUES('hello');
#     SELECT rowid, a FROM t5;
#   }
# } {1 hello}
# do_test vtab9-2.2 {
#   execsql {
#     INSERT INTO t5(rowid, a) VALUES(1, 'goodbye');
#   }
# } {1 hello}
# do_test vtab9-2.3 {
#   execsql {
#     REPLACE INTO t5(rowid, a) VALUES(1, 'goodbye');
#     SELECT * FROM t5;
#   }
# } {1 goodbye}

unset -nocomplain echo_module_begin_fail
finish_test