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1# 2005 August 24
2#
3# The author disclaims copyright to this source code. In place of
4# a legal notice, here is a blessing:
5#
6# May you do good and not evil.
7# May you find forgiveness for yourself and forgive others.
8# May you share freely, never taking more than you give.
9#
10#***********************************************************************
11# This file implements regression tests for SQLite library. The
12# focus of this script is a test of the DELETE command where a
13# large number of rows are deleted.
14#
15
16set testdir [file dirname $argv0]
17source $testdir/tester.tcl
18
19# Create a table that contains a large number of rows.
20#
21do_test delete3-1.1 {
22 execsql {
23 CREATE TABLE t1(x integer primary key);
24 BEGIN;
25 INSERT INTO t1 VALUES(1);
26 INSERT INTO t1 VALUES(2);
27 INSERT INTO t1 SELECT x+2 FROM t1;
28 INSERT INTO t1 SELECT x+4 FROM t1;
29 INSERT INTO t1 SELECT x+8 FROM t1;
30 INSERT INTO t1 SELECT x+16 FROM t1;
31 INSERT INTO t1 SELECT x+32 FROM t1;
32 INSERT INTO t1 SELECT x+64 FROM t1;
33 INSERT INTO t1 SELECT x+128 FROM t1;
34 INSERT INTO t1 SELECT x+256 FROM t1;
35 INSERT INTO t1 SELECT x+512 FROM t1;
36 INSERT INTO t1 SELECT x+1024 FROM t1;
37 INSERT INTO t1 SELECT x+2048 FROM t1;
38 INSERT INTO t1 SELECT x+4096 FROM t1;
39 INSERT INTO t1 SELECT x+8192 FROM t1;
40 INSERT INTO t1 SELECT x+16384 FROM t1;
41 INSERT INTO t1 SELECT x+32768 FROM t1;
42 INSERT INTO t1 SELECT x+65536 FROM t1;
43 INSERT INTO t1 SELECT x+131072 FROM t1;
44 INSERT INTO t1 SELECT x+262144 FROM t1;
45 COMMIT;
46 SELECT count(*) FROM t1;
47 }
48} {524288}
49do_test delete3-1.2 {
50 execsql {
51 DELETE FROM t1 WHERE x%2==0;
52 SELECT count(*) FROM t1;
53 }
54} {262144}
55integrity_check delete3-1.3
56
57finish_test