SQLite

/*
** 2003 April 6
**
** 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 code used to implement the ATTACH and DETACH commands.
**
** $Id: attach.c,v 1.13 2004/06/07 07:52:18 danielk1977 Exp $
*/
#include "sqliteInt.h"

/*
** This routine is called by the parser to process an ATTACH statement:
**
**     ATTACH DATABASE filename AS dbname

    sqliteCodecAttach(db, db->nDb-1, zKey, nKey);
  }
#endif
  sqliteFree(zFile);
  db->flags &= ~SQLITE_Initialized;
  if( pParse->nErr ) return;
  if( rc==SQLITE_OK ){
    rc = sqlite3ReadSchema(pParse->db);
  }
  if( rc ){
    int i = db->nDb - 1;
    assert( i>=2 );
    if( db->aDb[i].pBt ){
      sqlite3BtreeClose(db->aDb[i].pBt);
      db->aDb[i].pBt = 0;

**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**     PRAGMA
**
** $Id: build.c,v 1.207 2004/06/07 07:52:18 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Check to see if the schema for the database needs
** to be read from the SQLITE_MASTER and SQLITE_TEMP_MASTER tables.
** If it does, then read it.
*/
void sqlite3BeginParse(Parse *pParse, int explainFlag){
  sqlite *db = pParse->db;
  int i;
  pParse->explain = explainFlag;
#if 0
  if((db->flags & SQLITE_Initialized)==0 && db->init.busy==0 ){
    int rc = sqlite3Init(db, &pParse->zErrMsg);
    if( rc!=SQLITE_OK ){
      pParse->rc = rc;
      pParse->nErr++;
    }
  }
#endif
  for(i=0; i<db->nDb; i++){
    DbClearProperty(db, i, DB_Locked);
    if( !db->aDb[i].inTrans ){
      DbClearProperty(db, i, DB_Cookie);
    }
  }
  pParse->nVar = 0;

** using the ATTACH command.
**
** See also sqlite3LocateTable().
*/
Table *sqlite3FindTable(sqlite *db, const char *zName, const char *zDatabase){
  Table *p = 0;
  int i;
  int rc = sqlite3ReadSchema(db);
  for(i=0; rc==SQLITE_OK && i<db->nDb; i++){
    int j = (i<2) ? i^1 : i;   /* Search TEMP before MAIN */
    if( zDatabase!=0 && sqlite3StrICmp(zDatabase, db->aDb[j].zName) ) continue;
    p = sqlite3HashFind(&db->aDb[j].tblHash, zName, strlen(zName)+1);
    if( p ) break;
  }
  return p;
}

** for duplicate index names is done.)  The search order is
** TEMP first, then MAIN, then any auxiliary databases added
** using the ATTACH command.
*/
Index *sqlite3FindIndex(sqlite *db, const char *zName, const char *zDb){
  Index *p = 0;
  int i;
  int rc = sqlite3ReadSchema(db);
  for(i=0; rc==SQLITE_OK && i<db->nDb; i++){
    int j = (i<2) ? i^1 : i;  /* Search TEMP before MAIN */
    if( zDb && sqlite3StrICmp(zDb, db->aDb[j].zName) ) continue;
    p = sqlite3HashFind(&db->aDb[j].idxHash, zName, strlen(zName)+1);
    if( p ) break;
  }
  return p;
}

  int *pSchemaCookie = &(db->aDb[iDb].schema_cookie);

  sqlite3Randomness(1, &r);
  *pSchemaCookie = *pSchemaCookie + r + 1;
  db->flags |= SQLITE_InternChanges;
  sqlite3VdbeAddOp(v, OP_Integer, *pSchemaCookie, 0);
  sqlite3VdbeAddOp(v, OP_SetCookie, iDb, 0);










}

/*
** Measure the number of characters needed to output the given
** identifier.  The number returned includes any quotes used
** but does not include the null terminator.
*/

  /* Generate code to remove the table from the master table
  ** on disk.
  */
  v = sqlite3GetVdbe(pParse);
  if( v ){
    static VdbeOpList dropTable[] = {
      { OP_Rewind,     0, ADDR(13), 0},
      { OP_String8,    0, 0,        0}, /* 1 */
      { OP_MemStore,   1, 1,        0},
      { OP_MemLoad,    1, 0,        0}, /* 3 */
      { OP_Column,     0, 2,        0}, /* sqlite_master.tbl_name */
      { OP_Ne,         0, ADDR(12), 0},
      { OP_String8,    0, 0,        "trigger"},
      { OP_Column,     0, 2,        0}, /* sqlite_master.type */
      { OP_Eq,         0, ADDR(12), 0},
      { OP_Delete,     0, 0,        0},
      { OP_Rewind,     0, ADDR(13), 0},
      { OP_Goto,       0, ADDR(3),  0},
      { OP_Next,       0, ADDR(3),  0}, /* 12 */
    };
    Index *pIdx;
    Trigger *pTrigger;
    sqlite3BeginWriteOperation(pParse, 0, pTab->iDb);

    /* Drop all triggers associated with the table being dropped. Code
    ** is generated to remove entries from sqlite_master and/or
    ** sqlite_temp_master if required.
    */
    pTrigger = pTab->pTrigger;
    while( pTrigger ){
      assert( pTrigger->iDb==pTab->iDb || pTrigger->iDb==1 );
      sqlite3DropTriggerPtr(pParse, pTrigger, 1);
      if( pParse->explain ){
        pTrigger = pTrigger->pNext;
      }else{
        pTrigger = pTab->pTrigger;
      }
    }

    /* Drop all SQLITE_MASTER table and index entries that refer to the
    ** table. The program name loops through the master table and deletes
    ** every row that refers to a table of the same name as the one being
    ** dropped. Triggers are handled seperately because a trigger can be
    ** created in the temp database that refers to a table in another
    ** database.
    */
    sqlite3OpenMasterTable(v, pTab->iDb);
    base = sqlite3VdbeAddOpList(v, ArraySize(dropTable), dropTable);
    sqlite3VdbeChangeP3(v, base+1, pTab->zName, 0);









    sqlite3ChangeCookie(db, v, pTab->iDb);

    sqlite3VdbeAddOp(v, OP_Close, 0, 0);
    if( !isView ){
      sqlite3VdbeAddOp(v, OP_Destroy, pTab->tnum, pTab->iDb);
      for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
        sqlite3VdbeAddOp(v, OP_Destroy, pIdx->tnum, pIdx->iDb);
      }
    }

** specified auxiliary database and the temp database are made writable.
*/
void sqlite3BeginWriteOperation(Parse *pParse, int setStatement, int iDb){
  sqlite *db = pParse->db;
  Vdbe *v = sqlite3GetVdbe(pParse);
  if( v==0 ) return;
  sqlite3VdbeAddOp(v, OP_Transaction, iDb, 1);
  if( (iDb>63 || !(pParse->cookieMask & ((u64)1<<iDb))) ){
    sqlite3VdbeAddOp(v, OP_VerifyCookie, iDb, db->aDb[iDb].schema_cookie);
    pParse->cookieMask |= ((u64)1<<iDb);
  }
  if( setStatement ){
    sqlite3VdbeAddOp(v, OP_Statement, iDb, 0);
  }
  if( iDb!=1 ){

**
*************************************************************************
** 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 1.206 2004/06/07 07:52:18 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** A pointer to this structure is used to communicate information

/*
** Initialize all database files - the main database file, the file
** used to store temporary tables, and any additional database files
** created using ATTACH statements.  Return a success code.  If an
** error occurs, write an error message into *pzErrMsg.
**
** After the database is initialized, the SQLITE_Initialized
** bit is set in the flags field of the sqlite structure. 




*/
int sqlite3Init(sqlite *db, char **pzErrMsg){
  int i, rc;
  
  if( db->init.busy ) return SQLITE_OK;
  assert( (db->flags & SQLITE_Initialized)==0 );
  rc = SQLITE_OK;

  }

  if( rc!=SQLITE_OK ){
    db->flags &= ~SQLITE_Initialized;
  }
  return rc;
}

/*
** This routine is a no-op if the database schema is already initialised.
** Otherwise, the schema is loaded. An error code is returned.
*/
int sqlite3ReadSchema(sqlite *db){
  int rc = SQLITE_OK;
  char *zErrMsg = 0;

  if( !db->init.busy ){
    if( (db->flags & SQLITE_Initialized)==0 ){
      rc = sqlite3Init(db, &zErrMsg);
    }
  }
  assert( (db->flags & SQLITE_Initialized)!=0 || db->init.busy );

  sqlite3Error(db, rc, zErrMsg);
  if( zErrMsg ){
    sqliteFree(zErrMsg);
  }
  return rc;
}

/*
** The version of the library
*/
const char rcsid[] = "@(#) \044Id: SQLite version " SQLITE_VERSION " $";
const char sqlite3_version[] = SQLITE_VERSION;

  int rc = SQLITE_OK;

  if( sqlite3SafetyOn(db) ){
    rc = SQLITE_MISUSE;
    goto prepare_out;
  }
















  if( db->pVdbe==0 ){ db->nChange = 0; }
  memset(&sParse, 0, sizeof(sParse));
  sParse.db = db;
  sqlite3RunParser(&sParse, zSql, &zErrMsg);

  if( db->xTrace && !db->init.busy ){
    /* Trace only the statment that was compiled.

** is UTF-8 encoded. The fourth argument, "def_enc" is one of the TEXT_*
** macros from sqliteInt.h. If we end up creating a new database file
** (not opening an existing one), the text encoding of the database
** will be set to this value.
*/
static int openDatabase(
  const char *zFilename, /* Database filename UTF-8 encoded */
  sqlite3 **ppDb         /* OUT: Returned database handle */


){
  sqlite3 *db;
  int rc, i;
  char *zErrMsg = 0;














  /* Allocate the sqlite data structure */
  db = sqliteMalloc( sizeof(sqlite) );
  if( db==0 ) goto opendb_out;
  db->priorNewRowid = 0;
  db->magic = SQLITE_MAGIC_BUSY;
  db->nDb = 2;
  db->aDb = db->aDbStatic;
  db->enc = TEXT_Utf8;
  db->autoCommit = 1;
  /* db->flags |= SQLITE_ShortColNames; */
  sqlite3HashInit(&db->aFunc, SQLITE_HASH_STRING, 0);
  sqlite3HashInit(&db->aCollSeq, SQLITE_HASH_STRING, 0);
  for(i=0; i<db->nDb; i++){
    sqlite3HashInit(&db->aDb[i].tblHash, SQLITE_HASH_STRING, 0);
    sqlite3HashInit(&db->aDb[i].idxHash, SQLITE_HASH_STRING, 0);

    sqlite3Error(db, rc, 0);
    db->magic = SQLITE_MAGIC_CLOSED;
    goto opendb_out;
  }
  db->aDb[0].zName = "main";
  db->aDb[1].zName = "temp";

  /* Register all built-in functions, but do not attempt to read the
  ** database schema yet. This is delayed until the first time the database
  ** is accessed.
  */
  sqlite3RegisterBuiltinFunctions(db);





  if( rc==SQLITE_OK ){

    db->magic = SQLITE_MAGIC_OPEN;
  }else{
    sqlite3Error(db, rc, "%s", zErrMsg, 0);
    if( zErrMsg ) sqliteFree(zErrMsg);
    db->magic = SQLITE_MAGIC_CLOSED;
  }


opendb_out:
  *ppDb = db;
  return sqlite3_errcode(db);
}

/*
** Open a new database handle.
*/
int sqlite3_open(
  const char *zFilename, 
  sqlite3 **ppDb, 
  const char **options
){
  return openDatabase(zFilename, ppDb);
}

/*
** Open a new database handle.
*/
int sqlite3_open16(
  const void *zFilename, 
  sqlite3 **ppDb, 
  const char **options
){
  char *zFilename8;   /* zFilename encoded in UTF-8 instead of UTF-16 */
  int rc;

  assert( ppDb );

  zFilename8 = sqlite3utf16to8(zFilename, -1, SQLITE_BIGENDIAN);
  if( !zFilename8 ){
    *ppDb = 0;
    return SQLITE_NOMEM;
  }




  rc = openDatabase(zFilename8, ppDb);

  if( rc==SQLITE_OK && *ppDb ){
    sqlite3_exec(*ppDb, "PRAGMA encoding = 'UTF-16'", 0, 0, 0);
  }

  sqliteFree(zFilename8);

  return rc;
}

/*
** The following routine destroys a virtual machine that is created by
** the sqlite3_compile() routine. The integer returned is an SQLITE_
** success/failure code that describes the result of executing the virtual

/*
** 2003 April 6
**
** 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 code used to implement the PRAGMA command.
**
** $Id: pragma.c,v 1.37 2004/06/07 07:52:18 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** Interpret the given string as a boolean value.
*/

      { OP_Dup,         0, 0,        0},
      { OP_Integer,     0, 0,        0},
      { OP_Ne,          0, 6,        0},
      { OP_Integer,     0, 0,        0},  /* 5 */
      { OP_Callback,    1, 0,        0},
    };
    int addr;
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    if( pRight->z==pLeft->z ){
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, "cache_size", P3_STATIC);
      addr = sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
      sqlite3VdbeChangeP1(v, addr+5, MAX_PAGES);
    }else{
      int size = atoi(zRight);

  ** to its default value when the database is closed and reopened.
  ** N should be a positive integer.
  */
  if( sqlite3StrICmp(zLeft,"cache_size")==0 ){
    static VdbeOpList getCacheSize[] = {
      { OP_Callback,    1, 0,        0},
    };
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    if( pRight->z==pLeft->z ){
      int size = db->cache_size;;
      if( size<0 ) size = -size;
      sqlite3VdbeAddOp(v, OP_Integer, size, 0);
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, "cache_size", P3_STATIC);
      sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);

      { OP_AddImm,      1, 0,        0},
      { OP_Callback,    1, 0,        0},
      { OP_Halt,        0, 0,        0},
      { OP_AddImm,     -1, 0,        0},  /* 9 */
      { OP_Callback,    1, 0,        0}
    };
    int addr;
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    if( pRight->z==pLeft->z ){
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, "synchronous", P3_STATIC);
      addr = sqlite3VdbeAddOpList(v, ArraySize(getSync), getSync);
      sqlite3VdbeChangeP2(v, addr+2, addr+9);
    }else{
      int size = db->cache_size;

  ** default value will be restored the next time the database is
  ** opened.
  */
  if( sqlite3StrICmp(zLeft,"synchronous")==0 ){
    static VdbeOpList getSync[] = {
      { OP_Callback,    1, 0,        0},
    };
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    if( pRight->z==pLeft->z ){
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, "synchronous", P3_STATIC);
      sqlite3VdbeAddOp(v, OP_Integer, db->safety_level-1, 0);
      sqlite3VdbeAddOpList(v, ArraySize(getSync), getSync);
    }else{
      int size = db->cache_size;

  if( flagPragma(pParse, zLeft, zRight) ){
    /* The flagPragma() call also generates any necessary code */
  }else

  if( sqlite3StrICmp(zLeft, "table_info")==0 ){
    Table *pTab;
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    pTab = sqlite3FindTable(db, zRight, 0);
    if( pTab ){
      int i;
      sqlite3VdbeSetNumCols(v, 6);
      sqlite3VdbeSetColName(v, 0, "cid", P3_STATIC);
      sqlite3VdbeSetColName(v, 1, "name", P3_STATIC);
      sqlite3VdbeSetColName(v, 2, "type", P3_STATIC);

      }
    }
  }else

  if( sqlite3StrICmp(zLeft, "index_info")==0 ){
    Index *pIdx;
    Table *pTab;
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    pIdx = sqlite3FindIndex(db, zRight, 0);
    if( pIdx ){
      int i;
      pTab = pIdx->pTable;
      sqlite3VdbeSetNumCols(v, 3);
      sqlite3VdbeSetColName(v, 0, "seqno", P3_STATIC);
      sqlite3VdbeSetColName(v, 1, "cid", P3_STATIC);

      }
    }
  }else

  if( sqlite3StrICmp(zLeft, "index_list")==0 ){
    Index *pIdx;
    Table *pTab;
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    pTab = sqlite3FindTable(db, zRight, 0);
    if( pTab ){
      v = sqlite3GetVdbe(pParse);
      pIdx = pTab->pIndex;
    }
    if( pTab && pIdx ){
      int i = 0; 

      }
    }
  }else

  if( sqlite3StrICmp(zLeft, "foreign_key_list")==0 ){
    FKey *pFK;
    Table *pTab;
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    pTab = sqlite3FindTable(db, zRight, 0);
    if( pTab ){
      v = sqlite3GetVdbe(pParse);
      pFK = pTab->pFKey;
    }
    if( pTab && pFK ){
      int i = 0; 

        pFK = pFK->pNextFrom;
      }
    }
  }else

  if( sqlite3StrICmp(zLeft, "database_list")==0 ){
    int i;
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    sqlite3VdbeSetNumCols(v, 3);
    sqlite3VdbeSetColName(v, 0, "seq", P3_STATIC);
    sqlite3VdbeSetColName(v, 1, "name", P3_STATIC);
    sqlite3VdbeSetColName(v, 2, "file", P3_STATIC);
    for(i=0; i<db->nDb; i++){
      if( db->aDb[i].pBt==0 ) continue;
      assert( db->aDb[i].zName!=0 );

  ** Note that it is possible for the library compile-time options to
  ** override this setting
  */
  if( sqlite3StrICmp(zLeft, "temp_store")==0 ){
    static VdbeOpList getTmpDbLoc[] = {
      { OP_Callback,    1, 0,        0},
    };
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    if( pRight->z==pLeft->z ){
      sqlite3VdbeAddOp(v, OP_Integer, db->temp_store, 0);
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, "temp_store", P3_STATIC);
      sqlite3VdbeAddOpList(v, ArraySize(getTmpDbLoc), getTmpDbLoc);
    }else{
      changeTempStorage(pParse, zRight);

  ** Note that it is possible for the library compile-time options to
  ** override this setting
  */
  if( sqlite3StrICmp(zLeft, "default_temp_store")==0 ){
    static VdbeOpList getTmpDbLoc[] = {
      { OP_ReadCookie,  0, 5,        0},
      { OP_Callback,    1, 0,        0}};
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    if( pRight->z==pLeft->z ){
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, "temp_store", P3_STATIC);
      sqlite3VdbeAddOpList(v, ArraySize(getTmpDbLoc), getTmpDbLoc);
    }else{
      sqlite3BeginWriteOperation(pParse, 0, 0);
      sqlite3VdbeAddOp(v, OP_Integer, getTempStore(zRight), 0);
      sqlite3VdbeAddOp(v, OP_SetCookie, 0, 5);
      sqlite3EndWriteOperation(pParse);
    }
  }else

#ifndef NDEBUG
  if( sqlite3StrICmp(zLeft, "parser_trace")==0 ){
    extern void sqlite3ParserTrace(FILE*, char *);
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    if( getBoolean(zRight) ){
      sqlite3ParserTrace(stdout, "parser: ");
    }else{
      sqlite3ParserTrace(0, 0);
    }
  }else
#endif

      { OP_Integer,     0, 0,        0},
      { OP_Ne,          0, 0,        0},    /* 2 */
      { OP_String8,      0, 0,        "ok"},
      { OP_Callback,    1, 0,        0},
    };

    /* Initialize the VDBE program */
    if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, "integrity_check", P3_STATIC);
    sqlite3VdbeAddOpList(v, ArraySize(initCode), initCode);

    /* Do an integrity check on each database file */
    for(i=0; i<db->nDb; i++){
      HashElem *x;

          sqlite3VdbeChangeP3(v, addr+10, pIdx->zName, P3_STATIC);
        }
      } 
    }
    addr = sqlite3VdbeAddOpList(v, ArraySize(endCode), endCode);
    sqlite3VdbeChangeP2(v, addr+2, addr+ArraySize(endCode));
  }else
  /*
  **   PRAGMA encoding
  **   PRAGMA encoding = "utf-8"|"utf-16"|"utf-16le"|"utf-16be"
  **
  ** In it's first form, this pragma returns the encoding of the main
  ** database. If the database is not initialized, it is initialized now.
  **
  ** The second form of this pragma is a no-op if the main database file
  ** has not already been initialized. In this case it sets the default
  ** encoding that will be used for the main database file if a new file
  ** is created. If an existing main database file is opened, then the
  ** default text encoding for the existing database is used.
  ** 
  ** In all cases new databases created using the ATTACH command are
  ** created to use the same default text encoding as the main database. If
  ** the main database has not been initialized and/or created when ATTACH
  ** is executed, this is done before the ATTACH operation.
  **
  ** In the second form this pragma sets the text encoding to be used in
  ** new database files created using this database handle. It is only
  ** useful if invoked immediately after the main database i
  */
  if( sqlite3StrICmp(zLeft, "encoding")==0 ){
    struct EncName {
      char *zName;
      u8 enc;
    } encnames[] = {
      { "UTF-8", TEXT_Utf8 },
      { "UTF-16le", TEXT_Utf16le },
      { "UTF-16be", TEXT_Utf16be },
      { "UTF-16", TEXT_Utf16 },
      { "UTF8", TEXT_Utf8 },
      { "UTF16le", TEXT_Utf16le },
      { "UTF16be", TEXT_Utf16be },
      { "UTF16", TEXT_Utf16 },
      { 0, 0 }
    };
    struct EncName *pEnc;
    if( pRight->z==pLeft->z ){    /* "PRAGMA encoding" */
      if( SQLITE_OK!=sqlite3ReadSchema(pParse->db) ) return;
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, "encoding", P3_STATIC);
      sqlite3VdbeAddOp(v, OP_String8, 0, 0);
      for(pEnc=&encnames[0]; pEnc->zName; pEnc++){
        if( pEnc->enc==pParse->db->enc ){
          sqlite3VdbeChangeP3(v, -1, pEnc->zName, P3_STATIC);
          break;
        }
      }
      sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
    }else{                        /* "PRAGMA encoding = XXX" */
      /* Only change the value of sqlite.enc if the database handle is not
      ** initialized. If the main database exists, the new sqlite.enc value
      ** will be overwritten when the schema is next loaded. If it does not
      ** already exists, it will be created to use the new encoding value.
      */
      if( !(pParse->db->flags&SQLITE_Initialized) ){
        for(pEnc=&encnames[0]; pEnc->zName; pEnc++){
          if( 0==sqlite3StrICmp(zRight, pEnc->zName) ){
            pParse->db->enc = pEnc->enc;
            break;
          }
        }
        if( !pEnc->zName ){
          sqlite3Error(pParse->db, SQLITE_ERROR, 
              "Unsupported encoding: %s", zRight);
        }
      }
    }
  }else

  {}
  sqliteFree(zLeft);
  sqliteFree(zRight);
}

/*
** 2001 September 15
**
** 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.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.271 2004/06/07 07:52:18 danielk1977 Exp $
*/
#include "config.h"
#include "sqlite3.h"
#include "hash.h"
#include "parse.h"
#include <stdio.h>
#include <stdlib.h>

void sqlite3Error(sqlite *, int, const char*,...);
int sqlite3utfTranslate(const void *, int , u8 , void **, int *, u8);
u8 sqlite3UtfReadBom(const void *zData, int nData);
void *sqlite3HexToBlob(const char *z);
int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
const char *sqlite3ErrStr(int);
int sqlite3ReadUniChar(const char *zStr, int *pOffset, u8 *pEnc, int fold);
int sqlite3ReadSchema(sqlite *db);

  int i;
  const char *zDb;
  const char *zName;
  int nName;
  sqlite *db = pParse->db;

  if( sqlite3_malloc_failed ) goto drop_trigger_cleanup;
  if( SQLITE_OK!=sqlite3ReadSchema(db) ) goto drop_trigger_cleanup;

  assert( pName->nSrc==1 );
  zDb = pName->a[0].zDatabase;
  zName = pName->a[0].zName;
  nName = strlen(zName);
  for(i=0; i<db->nDb; i++){
    int j = (i<2) ? i^1 : i;  /* Search TEMP before MAIN */
    if( zDb && sqlite3StrICmp(db->aDb[j].zName, zDb) ) continue;

      return;
    }
  }
#endif

  /* Generate code to destroy the database record of the trigger.
  */
  if( pTable!=0 && (v = sqlite3GetVdbe(pParse))!=0 ){
    int base;
    static VdbeOpList dropTrigger[] = {
      { OP_Rewind,     0, ADDR(9),  0},
      { OP_String8,     0, 0,        0}, /* 1 */
      { OP_Column,     0, 1,        0},
      { OP_Ne,         0, ADDR(8),  0},
      { OP_String8,     0, 0,        "trigger"},
      { OP_Column,     0, 0,        0},
      { OP_Ne,         0, ADDR(8),  0},
      { OP_Delete,     0, 0,        0},
      { OP_Next,       0, ADDR(1),  0}, /* 8 */
    };

    sqlite3BeginWriteOperation(pParse, 0, pTrigger->iDb);
    sqlite3OpenMasterTable(v, pTrigger->iDb);
    base = sqlite3VdbeAddOpList(v,  ArraySize(dropTrigger), dropTrigger);
    sqlite3VdbeChangeP3(v, base+1, pTrigger->name, 0);

    sqlite3ChangeCookie(db, v, pTrigger->iDb);

    sqlite3VdbeAddOp(v, OP_Close, 0, 0);

  }

  /*
  ** If this is not an "explain", then delete the trigger structure.
  */
  if( !pParse->explain ){
    const char *zName = pTrigger->name;
    int nName = strlen(zName);
    if( pTable->pTrigger == pTrigger ){
      pTable->pTrigger = pTrigger->pNext;
    }else{
      Trigger *cc = pTable->pTrigger;

#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the ATTACH and DETACH commands
# and schema changes to attached databases.
#
# $Id: attach3.test,v 1.6 2004/06/07 07:52:19 danielk1977 Exp $
#


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

# Create tables t1 and t2 in the main database

  }
} {}
do_test attach3-8.2 {
  execsql {
    SELECT * FROM aux.sqlite_master WHERE name = 'tr1';
  }
} {}

# Try to trick SQLite into dropping the wrong temp trigger.
do_test attach3-9.0 {
  execsql {
    CREATE TABLE main.t4(a, b, c);
    CREATE TABLE aux.t4(a, b, c);
    CREATE TEMP TRIGGER tst_trigger BEFORE INSERT ON aux.t4 BEGIN 
      SELECT 'hello world';
    END;
    SELECT count(*) FROM sqlite_temp_master;
  }
} {1}
do_test attach3-9.1 {
  execsql {
    DROP TABLE main.t4;
    SELECT count(*) FROM sqlite_temp_master;
  }
} {1}
do_test attach3-9.2 {
  execsql {
    DROP TABLE aux.t4;
    SELECT count(*) FROM sqlite_temp_master;
  }
} {0}

finish_test

#
#***********************************************************************
# This file implements regression tests for SQLite library.  The focus of
# this file is testing the SQLite routines used for converting between the
# various suported unicode encodings (UTF-8, UTF-16, UTF-16le and
# UTF-16be).
#
# $Id: enc2.test,v 1.5 2004/06/07 07:52:19 danielk1977 Exp $

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

db close

# Return the UTF-8 representation of the supplied UTF-16 string $str. 

  CREATE TABLE t1(a PRIMARY KEY, b, c);
  INSERT INTO t1 VALUES('one', 'I', 1);
}
# This proc tests that we can open and manipulate the test.db 
# database, and that it is possible to retreive values in
# various text encodings.
#
proc run_test_script {t enc} {

# Open the database and pull out a (the) row.
do_test $t.1 {
  set DB [sqlite db test.db]
  execsql {SELECT * FROM t1}
} {one I 1}

  utf8 [sqlite3_column_text16 $STMT 0]
} {five}

do_test $t.9 {
  sqlite3_finalize $STMT
} SQLITE_OK

do_test $t.10 {
  db eval {PRAGMA encoding}
} $enc

}

# The three unicode encodings understood by SQLite.
set encodings [list UTF-8 UTF-16le UTF-16be]

set i 1
foreach enc $encodings {
  file delete -force test.db
  sqlite db test.db $enc
  db eval "PRAGMA encoding = \"$enc\""
  execsql $dbcontents
  db close
  run_test_script enc2-$i $enc
  incr i
}

finish_test