SQLite

**    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 1.132 2007/12/12 16:06:23 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.

    if( triggers_exist ){
      int mem1 = pParse->nMem++;
      addr = sqlite3VdbeAddOp(v, OP_FifoRead, 0, end);
      sqlite3VdbeAddOp(v, OP_MemStore, mem1, 0);
      if( !isView ){
        sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenRead);
      }
      sqlite3VdbeAddOp(v, OP_NotExists, iCur, addr);
      sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
      sqlite3VdbeAddOp(v, OP_RowData, iCur, 0);
      sqlite3VdbeAddOp(v, OP_Insert, oldIdx, 0);
      if( !isView ){
        sqlite3VdbeAddOp(v, OP_Close, iCur, 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 UPDATE statements.
**
** $Id: update.c,v 1.144 2007/12/12 16:06:23 danielk1977 Exp $
*/
#include "sqliteInt.h"

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Forward declaration */
static void updateVirtualTable(
  Parse *pParse,       /* The parsing context */

    
    if( !isView ){
      /* Open a cursor and make it point to the record that is
      ** being updated.
      */
      sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenRead);
    }
    sqlite3VdbeAddOp(v, OP_NotExists, iCur, addr);

    /* Generate the OLD table
    */
    sqlite3VdbeAddOp(v, OP_Rowid, iCur, 0);
    sqlite3VdbeAddOp(v, OP_RowData, iCur, 0);
    sqlite3VdbeAddOp(v, OP_Insert, oldIdx, 0);

# 2007 Dec 12
#
# 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 is to test that ticket #2832 has been fixed.
#
# $Id: tkt2832.test,v 1.2 2007/12/12 16:06:23 danielk1977 Exp $
#

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

do_test tkt2832-1.1 {
  execsql {
    CREATE TABLE t1(a PRIMARY KEY);
    INSERT INTO t1 VALUES(2);
    INSERT INTO t1 VALUES(1);
    INSERT INTO t1 VALUES(3);
  }
} {}
do_test tkt2832-1.2 {
  execsql {
    UPDATE OR REPLACE t1 SET a = 1;
    SELECT * FROM t1;
  }
} {1}

do_test tkt2832-2.1 {
  execsql {
    CREATE TABLE t2(a, b);
    CREATE TRIGGER t2_t AFTER UPDATE ON t2 BEGIN
      DELETE FROM t2 WHERE a = new.a + 1;
    END;
    INSERT INTO t2 VALUES(1, 2);
    INSERT INTO t2 VALUES(2, 3);
  }
} {}
do_test tkt2832-2.2 {
  execsql { 
    UPDATE t2 SET b = 5 
  }
} {}

do_test tkt2832-3.1 {
  execsql {
    CREATE TABLE t3(a, b);
    CREATE TRIGGER t3_t AFTER DELETE ON t3 BEGIN
      DELETE FROM t3 WHERE a = old.a + 1;
    END;
    INSERT INTO t3 VALUES(1, 2);
    INSERT INTO t3 VALUES(2, 3);
  }
} {}
do_test tkt2832-3.2 {
  explain { DELETE FROM t3 WHERE 1 }
  execsql { DELETE FROM t3 WHERE 1 }
} {}

finish_test