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Fix a bug in DELETE that might cause a segfault when deleting more

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than 40940 rows of data all at once. (CVS 2620)

FossilOrigin-Name: 7c599bae33ba4eb10fc486ae3dab76330ce69936
This commit is contained in:
drh
2005-08-24 16:13:51 +00:00
parent 3268f2b10c
commit 3ca84ba0a0
4 changed files with 70 additions and 7 deletions
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test/delete3.test Normal file
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# 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