From 87c97b4785cb0634bcb0cfda81115ccf05c9b258 Mon Sep 17 00:00:00 2001
From: Matthias Leich <Matthias.Leich@sun.com>
Date: Wed, 19 Nov 2008 19:17:26 +0100
Subject: Fix for Bug#26890 main.multi_update times out

The test itself is not faulty. The testcase timeout
problem happens if this IMHO mid size resource
(space in vardir, virtual memory, amount of disk I/O)
consuming test meets a weak (excessive disk I/O caused
by parallel applications or paging) testing box.

The modifications:
- Move the most time and disk I/O consuming subtest
  for Bug 1820 into its own script (multi_update2)
  This will reduce the likelihood that we exceed the
  testcase timeout.
- Replace error numbers with error names
- Minor improvements of the formatting

-
---
 mysql-test/t/multi_update2.test | 43 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 mysql-test/t/multi_update2.test

(limited to 'mysql-test/t/multi_update2.test')

diff --git a/mysql-test/t/multi_update2.test b/mysql-test/t/multi_update2.test
new file mode 100644
index 00000000000..47f9bc7bad7
--- /dev/null
+++ b/mysql-test/t/multi_update2.test
@@ -0,0 +1,43 @@
+#
+# Test of update statement that uses many tables.
+#
+
+--disable_warnings
+DROP TABLE IF EXISTS t1,t2;
+--enable_warnings
+
+#
+# Bug#1820 Rows not deleted from second table on multi-table delete
+#
+
+CREATE TABLE t1 ( a INT NOT NULL, b INT NOT NULL) ;
+--echo # The protocolling of many inserts into t1 is suppressed.
+--disable_query_log
+INSERT INTO t1 VALUES (1,1),(2,2),(3,3),(4,4);
+let $1=19;
+set @d=4;
+while ($1)
+{
+  eval INSERT INTO t1 SELECT a+@d,b+@d FROM t1;
+  eval SET @d=@d*2;
+  dec $1;
+}
+
+--enable_query_log
+ALTER TABLE t1 ADD INDEX i1(a);
+DELETE FROM t1 WHERE a > 2000000;
+CREATE TABLE t2 LIKE t1;
+INSERT INTO t2 SELECT * FROM t1;
+
+SELECT 't2 rows before small delete', COUNT(*) FROM t1;
+DELETE t1,t2 FROM t1,t2 WHERE t1.b=t2.a AND t1.a < 2;
+SELECT 't2 rows after small delete', COUNT(*) FROM t2;
+SELECT 't1 rows after small delete', COUNT(*) FROM t1;
+
+## Try deleting many rows 
+
+DELETE t1,t2 FROM t1,t2 WHERE t1.b=t2.a AND t1.a < 100*1000;
+SELECT 't2 rows after big delete', COUNT(*) FROM t2;
+SELECT 't1 rows after big delete', COUNT(*) FROM t1;
+
+DROP TABLE t1,t2;
-- 
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