From c03174458a46f382926abfcd669e8edd521dd59c Mon Sep 17 00:00:00 2001
From: Konstantin Osipov <kostja@sun.com>
Date: Wed, 9 Dec 2009 12:29:36 +0300
Subject: [PATCH] ----------------------------------------------------------
 revno: 2617.69.33 committer: Konstantin Osipov <kostja@sun.com> branch nick:
 mysql-next-46452 timestamp: Wed 2009-08-19 18:39:31 +0400 message:  
 Bug#46452 "Crash in MDL, HANDLER OPEN + TRUNCATE TABLE".   Flush open HANDLER
 tables before TRUNCATE, which is a DDL.

mysql-test/r/truncate.result:
  Update results for Bug#46452.
mysql-test/t/truncate.test:
  Add a test case for Bug#46452 "Crash in MDL, HANDLER OPEN + TRUNCATE TABLE".
---
 mysql-test/r/truncate.result | 14 ++++++++++++++
 mysql-test/t/truncate.test   | 23 +++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/mysql-test/r/truncate.result b/mysql-test/r/truncate.result
index b194f9b7dc6..8ce2ad9be21 100644
--- a/mysql-test/r/truncate.result
+++ b/mysql-test/r/truncate.result
@@ -60,3 +60,17 @@ truncate table v1;
 ERROR 42S02: Table 'test.v1' doesn't exist
 drop view v1;
 drop table t1;
+#
+# Bug#46452 Crash in MDL, HANDLER OPEN + TRUNCATE TABLE
+#
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1 AS SELECT 1 AS f1;
+HANDLER t1 OPEN;
+# Here comes the crash.
+TRUNCATE t1;
+# Currently TRUNCATE, just like other DDL, implicitly closes
+# open HANDLER table.
+HANDLER t1 READ FIRST;
+ERROR 42S02: Unknown table 't1' in HANDLER
+DROP TABLE t1;
+# End of 6.0 tests
diff --git a/mysql-test/t/truncate.test b/mysql-test/t/truncate.test
index ba5364bd324..feec4051e35 100644
--- a/mysql-test/t/truncate.test
+++ b/mysql-test/t/truncate.test
@@ -69,3 +69,26 @@ drop table t1;
 
 # End of 5.0 tests
 
+--echo #
+--echo # Bug#46452 Crash in MDL, HANDLER OPEN + TRUNCATE TABLE
+--echo #
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
+CREATE TABLE t1 AS SELECT 1 AS f1;
+
+HANDLER t1 OPEN;
+--echo # Here comes the crash.
+TRUNCATE t1;
+
+--echo # Currently TRUNCATE, just like other DDL, implicitly closes
+--echo # open HANDLER table.
+--error ER_UNKNOWN_TABLE
+HANDLER t1 READ FIRST;
+
+# Cleanup
+DROP TABLE t1;
+
+--echo # End of 6.0 tests
+