# 2005 August 24

 #

 # 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 implements regression tests for SQLite library.  The

 # focus of this script is a test of the DELETE command where a

 # large number of rows are deleted.

 #

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 # Create a table that contains a large number of rows.

 #

 do_test delete3-1.1 {

   execsql {

     CREATE TABLE t1(x integer primary key);

     BEGIN;

     INSERT INTO t1 VALUES(1);

     INSERT INTO t1 VALUES(2);

     INSERT INTO t1 SELECT x+2 FROM t1;

     INSERT INTO t1 SELECT x+4 FROM t1;

     INSERT INTO t1 SELECT x+8 FROM t1;

     INSERT INTO t1 SELECT x+16 FROM t1;

     INSERT INTO t1 SELECT x+32 FROM t1;

     INSERT INTO t1 SELECT x+64 FROM t1;

     INSERT INTO t1 SELECT x+128 FROM t1;

     INSERT INTO t1 SELECT x+256 FROM t1;

     INSERT INTO t1 SELECT x+512 FROM t1;

     INSERT INTO t1 SELECT x+1024 FROM t1;

     INSERT INTO t1 SELECT x+2048 FROM t1;

     INSERT INTO t1 SELECT x+4096 FROM t1;

     INSERT INTO t1 SELECT x+8192 FROM t1;

     INSERT INTO t1 SELECT x+16384 FROM t1;

     INSERT INTO t1 SELECT x+32768 FROM t1;

     INSERT INTO t1 SELECT x+65536 FROM t1;

     INSERT INTO t1 SELECT x+131072 FROM t1;

     INSERT INTO t1 SELECT x+262144 FROM t1;

     COMMIT;

     SELECT count(*) FROM t1;	

   }

 } {524288}

 do_test delete3-1.2 {

   execsql {

     DELETE FROM t1 WHERE x%2==0;

     SELECT count(*) FROM t1;

   }

 } {262144}

 integrity_check delete3-1.3

 finish_test