From 4ce7c966f023cba131f13b09a831b4aa7c0811b1 Mon Sep 17 00:00:00 2001
From: Konstantin Osipov <kostja@sun.com>
Date: Tue, 13 Oct 2009 23:04:58 +0400
Subject: [PATCH] Backport of:
 ----------------------------------------------------------- revno: 2630.2.4
 committer: Konstantin Osipov <konstantin@mysql.com> branch nick:
 mysql-6.0-runtime timestamp: Fri 2008-05-23 02:42:32 +0400 message:  
 Bug#27430 "Crash in subquery code when in PS and table DDL changed after  
 PREPARE"   Add a test case for the situation with small TDC and many merge
 children.

from 6.0-codebase.
---
 mysql-test/r/merge.result | 36 +++++++++++++++++++++++
 mysql-test/t/merge.test   | 60 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 96 insertions(+)

diff --git a/mysql-test/r/merge.result b/mysql-test/r/merge.result
index a2248d3d878..b205e2a4c35 100644
--- a/mysql-test/r/merge.result
+++ b/mysql-test/r/merge.result
@@ -2220,3 +2220,39 @@ tr1		CREATE DEFINER=`root`@`localhost` TRIGGER tr1 AFTER INSERT ON t3 FOR EACH R
 DROP TRIGGER tr1;
 DROP TABLE t1, t2, t3;
 End of 5.1 tests
+#
+# An additional test case for Bug#27430 Crash in subquery code
+# when in PS and table DDL changed after PREPARE
+#
+# Test merge table with too many merge children.
+#
+drop table if exists t_parent;
+set @save_table_definition_cache=@@global.table_definition_cache;
+#
+# Set @@global.table_definition_cache to minimum
+#
+set @@global.table_definition_cache=400;
+set @a=null;
+#
+# Create 400 merge children
+#
+set @a=concat("create table t_parent (a int) union(", @a,
+") insert_method=first engine=mrg_myisam");
+prepare stmt from @a;
+execute stmt;
+prepare stmt from "select * from t_parent";
+execute stmt;
+ERROR HY000: Prepared statement needs to be re-prepared
+execute stmt;
+ERROR HY000: Prepared statement needs to be re-prepared
+execute stmt;
+ERROR HY000: Prepared statement needs to be re-prepared
+deallocate prepare stmt;
+#
+# Create merge parent 
+#
+#
+# Cleanup
+#
+drop table t_parent;
+set @@global.table_definition_cache=@save_table_definition_cache;
diff --git a/mysql-test/t/merge.test b/mysql-test/t/merge.test
index 015ae28c155..63ad5a1e97c 100644
--- a/mysql-test/t/merge.test
+++ b/mysql-test/t/merge.test
@@ -1634,3 +1634,63 @@ DROP TRIGGER tr1;
 DROP TABLE t1, t2, t3;
 
 --echo End of 5.1 tests
+
+--echo #
+--echo # An additional test case for Bug#27430 Crash in subquery code
+--echo # when in PS and table DDL changed after PREPARE
+--echo #
+--echo # Test merge table with too many merge children.
+--echo #
+--disable_warnings
+drop table if exists t_parent;
+--enable_warnings
+set @save_table_definition_cache=@@global.table_definition_cache;
+--echo #
+--echo # Set @@global.table_definition_cache to minimum
+--echo #
+set @@global.table_definition_cache=400;
+set @a=null;
+let $1 = 400;
+--echo #
+--echo # Create 400 merge children
+--echo #
+--disable_query_log
+while ($1)
+{
+--disable_warnings
+  eval drop table if exists t$1;
+--enable_warnings
+  eval create table t$1 (a int) engine=myisam;
+  eval set @a=ifnull(concat(@a, ", ", "t$1"), "t$1");
+  dec $1;
+}
+--enable_query_log
+set @a=concat("create table t_parent (a int) union(", @a,
+              ") insert_method=first engine=mrg_myisam");
+prepare stmt from @a;
+execute stmt;
+prepare stmt from "select * from t_parent";
+--error ER_NEED_REPREPARE
+execute stmt;
+--error ER_NEED_REPREPARE
+execute stmt;
+--error ER_NEED_REPREPARE
+execute stmt;
+deallocate prepare stmt;
+--echo #
+--echo # Create merge parent 
+--echo #
+
+--echo #
+--echo # Cleanup
+--echo #
+let $1 = 400;
+--disable_query_log
+while ($1)
+{
+  eval drop table t$1;
+  dec $1;
+}
+--enable_query_log
+drop table t_parent;
+set @@global.table_definition_cache=@save_table_definition_cache;