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Overview
Comment:When an automatic re-prepare occurs, take care not to reset the internal schema symbol table. Ticket #2156. This change also includes some debugging enhancements. (CVS 3578)
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Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1:43fe7fc1c38f8d9b3c1346cb1d890c2e25cefe15
User & Date: drh 2007-01-09 14:01:13
Context
2007-01-09
14:37
Do not use the symbol "interrupt" since that is a reserved word in OpenWatcom. Ticket #2159. (CVS 3579) check-in: 9960ba57 user: drh tags: trunk
14:01
When an automatic re-prepare occurs, take care not to reset the internal schema symbol table. Ticket #2156. This change also includes some debugging enhancements. (CVS 3578) check-in: 43fe7fc1 user: drh tags: trunk
2007-01-08
22:40
Additional tests of sqlite3_prepare_v2. (CVS 3577) check-in: b0650aa6 user: drh tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/prepare.c.

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**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains the implementation of the sqlite3_prepare()
** interface, and routines that contribute to loading the database schema
** from disk.
**
** $Id: prepare.c,v 1.42 2007/01/08 21:07:18 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** Fill the InitData structure with an error message that indicates
................................................................................
    assert( pNew==0 );
    return 0;
  }else{
    assert( pNew!=0 );
  }
  sqlite3VdbeSwap(pNew, p);
  sqlite3_transfer_bindings((sqlite3_stmt*)pNew, (sqlite3_stmt*)p);
  sqlite3_finalize((sqlite3_stmt*)pNew);

  return 1;
}


/*
** Two versions of the official API.  Legacy and new use.  In the legacy
** version, the original SQL text is not saved in the prepared statement







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**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains the implementation of the sqlite3_prepare()
** interface, and routines that contribute to loading the database schema
** from disk.
**
** $Id: prepare.c,v 1.43 2007/01/09 14:01:13 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** Fill the InitData structure with an error message that indicates
................................................................................
    assert( pNew==0 );
    return 0;
  }else{
    assert( pNew!=0 );
  }
  sqlite3VdbeSwap(pNew, p);
  sqlite3_transfer_bindings((sqlite3_stmt*)pNew, (sqlite3_stmt*)p);
  sqlite3VdbeResetStepResult(pNew);
  sqlite3VdbeFinalize(pNew);
  return 1;
}


/*
** Two versions of the official API.  Legacy and new use.  In the legacy
** version, the original SQL text is not saved in the prepared statement

Changes to src/test1.c.

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**    May you share freely, never taking more than you give.
**
*************************************************************************
** Code for testing all sorts of SQLite interfaces.  This code
** is not included in the SQLite library.  It is used for automated
** testing of the SQLite library.
**
** $Id: test1.c,v 1.226 2007/01/03 23:37:28 drh Exp $
*/
#include "sqliteInt.h"
#include "tcl.h"
#include "os.h"
#include <stdlib.h>
#include <string.h>

................................................................................
    sqlite3_create_function(db, "x_count", 1, SQLITE_UTF8, 0, 0,
        countStep,countFinalize);
  }
  if( sqlite3TestErrCode(interp, db, rc) ) return TCL_ERROR;
  return TCL_OK;
}



























/*
** Usage:  sqlite3_mprintf_int FORMAT INTEGER INTEGER INTEGER
**
** Call mprintf with three integer arguments
*/
................................................................................
     { "sqlite_set_magic",              (Tcl_CmdProc*)sqlite_set_magic      },
     { "sqlite3_interrupt",             (Tcl_CmdProc*)test_interrupt        },
     { "sqlite_delete_function",        (Tcl_CmdProc*)delete_function       },
     { "sqlite_delete_collation",       (Tcl_CmdProc*)delete_collation      },
     { "sqlite3_get_autocommit",        (Tcl_CmdProc*)get_autocommit        },
     { "sqlite3_stack_used",            (Tcl_CmdProc*)test_stack_used       },
     { "sqlite3_busy_timeout",          (Tcl_CmdProc*)test_busy_timeout     },

  };
  static struct {
     char *zName;
     Tcl_ObjCmdProc *xProc;
     void *clientData;
  } aObjCmd[] = {
     { "sqlite3_connection_pointer",    get_sqlite_pointer, 0 },







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**    May you share freely, never taking more than you give.
**
*************************************************************************
** Code for testing all sorts of SQLite interfaces.  This code
** is not included in the SQLite library.  It is used for automated
** testing of the SQLite library.
**
** $Id: test1.c,v 1.227 2007/01/09 14:01:13 drh Exp $
*/
#include "sqliteInt.h"
#include "tcl.h"
#include "os.h"
#include <stdlib.h>
#include <string.h>

................................................................................
    sqlite3_create_function(db, "x_count", 1, SQLITE_UTF8, 0, 0,
        countStep,countFinalize);
  }
  if( sqlite3TestErrCode(interp, db, rc) ) return TCL_ERROR;
  return TCL_OK;
}


/*
** Usage:  printf TEXT
**
** Send output to printf.  Use this rather than puts to merge the output
** in the correct sequence with debugging printfs inserted into C code.
** Puts uses a separate buffer and debugging statements will be out of
** sequence if it is used.
*/
static int test_printf(
  void *NotUsed,
  Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
  int argc,              /* Number of arguments */
  char **argv            /* Text of each argument */
){
  if( argc!=2 ){
    Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
       " TEXT\"", 0);
    return TCL_ERROR;
  }
  printf("%s\n", argv[1]);
  return TCL_OK;
}



/*
** Usage:  sqlite3_mprintf_int FORMAT INTEGER INTEGER INTEGER
**
** Call mprintf with three integer arguments
*/
................................................................................
     { "sqlite_set_magic",              (Tcl_CmdProc*)sqlite_set_magic      },
     { "sqlite3_interrupt",             (Tcl_CmdProc*)test_interrupt        },
     { "sqlite_delete_function",        (Tcl_CmdProc*)delete_function       },
     { "sqlite_delete_collation",       (Tcl_CmdProc*)delete_collation      },
     { "sqlite3_get_autocommit",        (Tcl_CmdProc*)get_autocommit        },
     { "sqlite3_stack_used",            (Tcl_CmdProc*)test_stack_used       },
     { "sqlite3_busy_timeout",          (Tcl_CmdProc*)test_busy_timeout     },
     { "printf",                        (Tcl_CmdProc*)test_printf           },
  };
  static struct {
     char *zName;
     Tcl_ObjCmdProc *xProc;
     void *clientData;
  } aObjCmd[] = {
     { "sqlite3_connection_pointer",    get_sqlite_pointer, 0 },

Changes to src/vdbe.c.

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**
** 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 1.584 2007/01/05 16:39:43 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
................................................................................
  if( p->popStack ){
    popStack(&pTos, p->popStack);
    p->popStack = 0;
  }
  p->resOnStack = 0;
  db->busyHandler.nBusy = 0;
  CHECK_FOR_INTERRUPT;















  for(pc=p->pc; rc==SQLITE_OK; pc++){
    assert( pc>=0 && pc<p->nOp );
    assert( pTos<=&p->aStack[pc] );
    if( sqlite3MallocFailed() ) goto no_mem;
#ifdef VDBE_PROFILE
    origPc = pc;
    start = hwtime();
................................................................................
    pTos->flags = MEM_Int;
  }else{
    pTos->flags = MEM_Null;
  }
  break;
}

/* Opcode: ParseSchema P1 * P3
**
** Read and parse all entries from the SQLITE_MASTER table of database P1
** that match the WHERE clause P3.




**
** This opcode invokes the parser to create a new virtual machine,
** then runs the new virtual machine.  It is thus a reentrant opcode.
*/
case OP_ParseSchema: {        /* no-push */
  char *zSql;
  int iDb = pOp->p1;
  const char *zMaster;
  InitData initData;

  assert( iDb>=0 && iDb<db->nDb );
  if( !DbHasProperty(db, iDb, DB_SchemaLoaded) ) break;


  zMaster = SCHEMA_TABLE(iDb);
  initData.db = db;
  initData.iDb = pOp->p1;
  initData.pzErrMsg = &p->zErrMsg;
  zSql = sqlite3MPrintf(
     "SELECT name, rootpage, sql FROM '%q'.%s WHERE %s",
     db->aDb[iDb].zName, zMaster, pOp->p3);







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**
** 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 1.585 2007/01/09 14:01:14 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
................................................................................
  if( p->popStack ){
    popStack(&pTos, p->popStack);
    p->popStack = 0;
  }
  p->resOnStack = 0;
  db->busyHandler.nBusy = 0;
  CHECK_FOR_INTERRUPT;
#ifdef SQLITE_DEBUG
  if( (p->db->flags & SQLITE_VdbeListing)!=0
    || sqlite3OsFileExists("vdbe_explain")
  ){
    int i;
    printf("VDBE Program Listing:\n");
    sqlite3VdbePrintSql(p);
    for(i=0; i<p->nOp; i++){
      sqlite3VdbePrintOp(stdout, i, &p->aOp[i]);
    }
  }
  if( sqlite3OsFileExists("vdbe_trace") ){
    p->trace = stdout;
  }
#endif
  for(pc=p->pc; rc==SQLITE_OK; pc++){
    assert( pc>=0 && pc<p->nOp );
    assert( pTos<=&p->aStack[pc] );
    if( sqlite3MallocFailed() ) goto no_mem;
#ifdef VDBE_PROFILE
    origPc = pc;
    start = hwtime();
................................................................................
    pTos->flags = MEM_Int;
  }else{
    pTos->flags = MEM_Null;
  }
  break;
}

/* Opcode: ParseSchema P1 P2 P3
**
** Read and parse all entries from the SQLITE_MASTER table of database P1
** that match the WHERE clause P3.  P2 is the "force" flag.   Always do
** the parsing if P2 is true.  If P2 is false, then this routine is a
** no-op if the schema is not currently loaded.  In other words, if P2
** is false, the SQLITE_MASTER table is only parsed if the rest of the
** schema is already loaded into the symbol table.
**
** This opcode invokes the parser to create a new virtual machine,
** then runs the new virtual machine.  It is thus a reentrant opcode.
*/
case OP_ParseSchema: {        /* no-push */
  char *zSql;
  int iDb = pOp->p1;
  const char *zMaster;
  InitData initData;

  assert( iDb>=0 && iDb<db->nDb );
  if( !pOp->p2 && !DbHasProperty(db, iDb, DB_SchemaLoaded) ){
    break;
  }
  zMaster = SCHEMA_TABLE(iDb);
  initData.db = db;
  initData.iDb = pOp->p1;
  initData.pzErrMsg = &p->zErrMsg;
  zSql = sqlite3MPrintf(
     "SELECT name, rootpage, sql FROM '%q'.%s WHERE %s",
     db->aDb[iDb].zName, zMaster, pOp->p3);

Changes to src/vdbe.h.

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*************************************************************************
** Header file for the Virtual DataBase Engine (VDBE)
**
** This header defines the interface to the virtual database engine
** or VDBE.  The VDBE implements an abstract machine that runs a
** simple program to access and modify the underlying database.
**
** $Id: vdbe.h,v 1.107 2007/01/08 21:07:18 drh Exp $
*/
#ifndef _SQLITE_VDBE_H_
#define _SQLITE_VDBE_H_
#include <stdio.h>

/*
** A single VDBE is an opaque structure named "Vdbe".  Only routines
................................................................................
int sqlite3VdbeMakeLabel(Vdbe*);
void sqlite3VdbeDelete(Vdbe*);
void sqlite3VdbeMakeReady(Vdbe*,int,int,int,int);
int sqlite3VdbeFinalize(Vdbe*);
void sqlite3VdbeResolveLabel(Vdbe*, int);
int sqlite3VdbeCurrentAddr(Vdbe*);
void sqlite3VdbeTrace(Vdbe*,FILE*);

int sqlite3VdbeReset(Vdbe*);
int sqliteVdbeSetVariables(Vdbe*,int,const char**);
void sqlite3VdbeSetNumCols(Vdbe*,int);
int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, int);
void sqlite3VdbeCountChanges(Vdbe*);
sqlite3 *sqlite3VdbeDb(Vdbe*);
void sqlite3VdbeSetSql(Vdbe*, const char *z, int n);







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*************************************************************************
** Header file for the Virtual DataBase Engine (VDBE)
**
** This header defines the interface to the virtual database engine
** or VDBE.  The VDBE implements an abstract machine that runs a
** simple program to access and modify the underlying database.
**
** $Id: vdbe.h,v 1.108 2007/01/09 14:01:14 drh Exp $
*/
#ifndef _SQLITE_VDBE_H_
#define _SQLITE_VDBE_H_
#include <stdio.h>

/*
** A single VDBE is an opaque structure named "Vdbe".  Only routines
................................................................................
int sqlite3VdbeMakeLabel(Vdbe*);
void sqlite3VdbeDelete(Vdbe*);
void sqlite3VdbeMakeReady(Vdbe*,int,int,int,int);
int sqlite3VdbeFinalize(Vdbe*);
void sqlite3VdbeResolveLabel(Vdbe*, int);
int sqlite3VdbeCurrentAddr(Vdbe*);
void sqlite3VdbeTrace(Vdbe*,FILE*);
void sqlite3VdbeResetStepResult(Vdbe*);
int sqlite3VdbeReset(Vdbe*);
int sqliteVdbeSetVariables(Vdbe*,int,const char**);
void sqlite3VdbeSetNumCols(Vdbe*,int);
int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, int);
void sqlite3VdbeCountChanges(Vdbe*);
sqlite3 *sqlite3VdbeDb(Vdbe*);
void sqlite3VdbeSetSql(Vdbe*, const char *z, int n);

Changes to src/vdbeaux.c.

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      }
    }
  }
  for(n=0; n<p->nMem; n++){
    p->aMem[n].flags = MEM_Null;
  }

#ifdef SQLITE_DEBUG
  if( (p->db->flags & SQLITE_VdbeListing)!=0
    || sqlite3OsFileExists("vdbe_explain")
  ){
    int i;
    printf("VDBE Program Listing:\n");
    sqlite3VdbePrintSql(p);
    for(i=0; i<p->nOp; i++){
      sqlite3VdbePrintOp(stdout, i, &p->aOp[i]);
    }
  }
  if( sqlite3OsFileExists("vdbe_trace") ){
    p->trace = stdout;
  }
#endif
  p->pTos = &p->aStack[-1];
  p->pc = -1;
  p->rc = SQLITE_OK;
  p->uniqueCnt = 0;
  p->returnDepth = 0;
  p->errorAction = OE_Abort;
  p->popStack =  0;
................................................................................
    db->activeVdbeCnt--;
  }
  p->magic = VDBE_MAGIC_HALT;
  checkActiveVdbeCnt(db);

  return SQLITE_OK;
}









/*
** Clean up a VDBE after execution but do not delete the VDBE just yet.
** Write any error messages into *pzErrMsg.  Return the result code.
**
** After this routine is run, the VDBE should be ready to be executed
** again.







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      }
    }
  }
  for(n=0; n<p->nMem; n++){
    p->aMem[n].flags = MEM_Null;
  }
















  p->pTos = &p->aStack[-1];
  p->pc = -1;
  p->rc = SQLITE_OK;
  p->uniqueCnt = 0;
  p->returnDepth = 0;
  p->errorAction = OE_Abort;
  p->popStack =  0;
................................................................................
    db->activeVdbeCnt--;
  }
  p->magic = VDBE_MAGIC_HALT;
  checkActiveVdbeCnt(db);

  return SQLITE_OK;
}

/*
** Each VDBE holds the result of the most recent sqlite3_step() call
** in p->rc.  This routine sets that result back to SQLITE_OK.
*/
void sqlite3VdbeResetStepResult(Vdbe *p){
  p->rc = SQLITE_OK;
}

/*
** Clean up a VDBE after execution but do not delete the VDBE just yet.
** Write any error messages into *pzErrMsg.  Return the result code.
**
** After this routine is run, the VDBE should be ready to be executed
** again.

Changes to src/vtab.c.

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**    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 1.38 2007/01/05 14:41:07 drh Exp $
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#include "sqliteInt.h"

/*
** External API function used to create a new virtual-table module.
*/
................................................................................
    );
    sqliteFree(zStmt);
    v = sqlite3GetVdbe(pParse);
    sqlite3ChangeCookie(db, v, iDb);

    sqlite3VdbeAddOp(v, OP_Expire, 0, 0);
    zWhere = sqlite3MPrintf("name='%q'", pTab->zName);
    sqlite3VdbeOp3(v, OP_ParseSchema, iDb, 0, zWhere, P3_DYNAMIC);
    sqlite3VdbeOp3(v, OP_VCreate, iDb, 0, pTab->zName, strlen(pTab->zName) + 1);
  }

  /* If we are rereading the sqlite_master table create the in-memory
  ** record of the table. If the module has already been registered,
  ** also call the xConnect method here.
  */







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**    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.
*/
................................................................................
    );
    sqliteFree(zStmt);
    v = sqlite3GetVdbe(pParse);
    sqlite3ChangeCookie(db, v, iDb);

    sqlite3VdbeAddOp(v, OP_Expire, 0, 0);
    zWhere = sqlite3MPrintf("name='%q'", pTab->zName);
    sqlite3VdbeOp3(v, OP_ParseSchema, iDb, 1, zWhere, P3_DYNAMIC);
    sqlite3VdbeOp3(v, OP_VCreate, iDb, 0, pTab->zName, strlen(pTab->zName) + 1);
  }

  /* If we are rereading the sqlite_master table create the in-memory
  ** record of the table. If the module has already been registered,
  ** also call the xConnect method here.
  */

Changes to test/vtab1.test.

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#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is creating and dropping virtual tables.
#
# $Id: vtab1.test,v 1.38 2006/09/16 21:45:14 drh Exp $

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

ifcapable !vtab||!schema_pragmas {
  finish_test
  return
................................................................................
  }
} {1 {vtable constructor failed: t1}}
do_test vtab1-1.6 {
  execsql {
    SELECT name FROM sqlite_master ORDER BY 1
  }
} {}
























# Test to make sure nothing goes wrong and no memory is leaked if we 
# select an illegal table-name (i.e a reserved name or the name of a
# table that already exists).
#
do_test vtab1-1.7 {
  catchsql {







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#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is creating and dropping virtual tables.
#
# $Id: vtab1.test,v 1.39 2007/01/09 14:01:14 drh Exp $

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

ifcapable !vtab||!schema_pragmas {
  finish_test
  return
................................................................................
  }
} {1 {vtable constructor failed: t1}}
do_test vtab1-1.6 {
  execsql {
    SELECT name FROM sqlite_master ORDER BY 1
  }
} {}

# Ticket #2156.  Using the sqlite3_prepare_v2() API, make sure that
# a CREATE VIRTUAL TABLE statement can be used multiple times.
#
do_test vtab1-1.2152.1 {
  set DB [sqlite3_connection_pointer db]
  set sql {CREATE VIRTUAL TABLE t2152a USING echo(t2152b)}
  set STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
  sqlite3_step $STMT
} SQLITE_ERROR
do_test vtab-1.2152.2 {
  sqlite3_reset $STMT
  sqlite3_step $STMT
} SQLITE_ERROR
do_test vtab-1.2152.3 {
  sqlite3_reset $STMT
  db eval {CREATE TABLE t2152b(x,y)}
  sqlite3_step $STMT
} SQLITE_DONE
do_test vtab-1.2152.4 {
  sqlite3_finalize $STMT
  db eval {DROP TABLE t2152a; DROP TABLE t2152b}
} {}

# Test to make sure nothing goes wrong and no memory is leaked if we 
# select an illegal table-name (i.e a reserved name or the name of a
# table that already exists).
#
do_test vtab1-1.7 {
  catchsql {