summaryrefslogtreecommitdiff
path: root/test/sidedelete.test
diff options
context:
space:
mode:
authorHans-Christoph Steiner <hans@eds.org>2012-03-30 20:42:12 -0400
committerHans-Christoph Steiner <hans@eds.org>2012-03-30 20:42:12 -0400
commit7bb481fda9ecb134804b49c2ce77ca28f7eea583 (patch)
tree31b520b9914d3e2453968abe375f2c102772c3dc /test/sidedelete.test
Imported Upstream version 2.0.3
Diffstat (limited to 'test/sidedelete.test')
-rw-r--r--test/sidedelete.test92
1 files changed, 92 insertions, 0 deletions
diff --git a/test/sidedelete.test b/test/sidedelete.test
new file mode 100644
index 0000000..04e457d
--- /dev/null
+++ b/test/sidedelete.test
@@ -0,0 +1,92 @@
+# 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 contains test cases for stressing database
+# changes that involve side effects that delete rows from
+# the table being changed. Ticket #2832 shows that in
+# older versions of SQLite that behavior was implemented
+# incorrectly and resulted in corrupt database files.
+#
+# $Id: sidedelete.test,v 1.2 2008/08/04 03:51:24 danielk1977 Exp $
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# The sequence table is created to store a sequence of integers
+# starting with 1. This is used to reinitialize other tables
+# as part of other tests.
+#
+do_test sidedelete-1.1 {
+ execsql {
+ CREATE TABLE sequence(a INTEGER PRIMARY KEY);
+ INSERT INTO sequence VALUES(1);
+ INSERT INTO sequence VALUES(2);
+ }
+ for {set i 0} {$i<8} {incr i} {
+ execsql {
+ INSERT INTO sequence SELECT a+(SELECT max(a) FROM sequence) FROM sequence;
+ }
+ }
+ execsql {SELECT count(*) FROM sequence}
+} {512}
+
+# Make a series of changes using an UPDATE OR REPLACE and a
+# correlated subquery. This would cause database corruption
+# prior to the fix for ticket #2832.
+#
+do_test sidedelete-2.0 {
+ execsql {
+ CREATE TABLE t1(a PRIMARY KEY, b);
+ CREATE TABLE chng(a PRIMARY KEY, b);
+ SELECT count(*) FROM t1;
+ SELECT count(*) FROM chng;
+ }
+} {0 0}
+for {set i 2} {$i<=100} {incr i} {
+ set n [expr {($i+2)/2}]
+ do_test sidedelete-2.$i.1 {
+ execsql {
+ DELETE FROM t1;
+ INSERT INTO t1 SELECT a, a FROM sequence WHERE a<=$i;
+ DELETE FROM chng;
+ INSERT INTO chng SELECT a*2, a*2+1 FROM sequence WHERE a<=$i/2;
+ UPDATE OR REPLACE t1 SET a=(SELECT b FROM chng WHERE a=t1.a);
+ SELECT count(*), sum(a) FROM t1;
+ }
+ } [list $n [expr {$n*$n-1}]]
+ integrity_check sidedelete-2.$i.2
+}
+
+# This will cause stacks leaks but not database corruption prior
+# to the #2832 fix.
+#
+do_test sidedelete-3.0 {
+ execsql {
+ DROP TABLE t1;
+ CREATE TABLE t1(a PRIMARY KEY);
+ SELECT * FROM t1;
+ }
+} {}
+for {set i 1} {$i<=100} {incr i} {
+ set n [expr {($i+1)/2}]
+ do_test sidedelete-3.$i.1 {
+ execsql {
+ DELETE FROM t1;
+ INSERT INTO t1 SELECT a FROM sequence WHERE a<=$i;
+ UPDATE OR REPLACE t1 SET a=a+1;
+ SELECT count(*), sum(a) FROM t1;
+ }
+ } [list $n [expr {$n*($n+1)}]]
+ integrity_check sidedelete-3.$i.2
+}
+
+finish_test