Merge main 5.1 -> 5.1-build

1 files changed, 47 insertions, 0 deletions

diff --git a/mysql-test/t/explain.test b/mysql-test/t/explain.test
index c9ae8aceaf6..3a71fde4421 100644
--- a/mysql-test/t/explain.test
+++ b/mysql-test/t/explain.test
@@ -94,4 +94,51 @@ EXPLAIN SELECT 1 FROM
 DROP TABLE t2;
 DROP TABLE t1;
 
+#
+# Bug #34773: query with explain extended and derived table / other table
+# crashes server
+#
+
+CREATE TABLE t1(a INT);
+CREATE TABLE t2(a INT);
+INSERT INTO t1 VALUES (1),(2);
+INSERT INTO t2 VALUES (1),(2);
+
+EXPLAIN EXTENDED SELECT 1
+ FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
+
+EXPLAIN EXTENDED SELECT 1
+ FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
+
+prepare s1 from 
+'EXPLAIN EXTENDED SELECT 1  
+ FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
+execute s1;
+
+prepare s1 from 
+'EXPLAIN EXTENDED SELECT 1  
+ FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
+execute s1;
+execute s1;
+
+DROP TABLE t1,t2;
+
+--echo #
+--echo # Bug#37870: Usage of uninitialized value caused failed assertion.
+--echo #
+create table t1 (dt datetime not null, t time not null);
+create table t2 (dt datetime not null);
+insert into t1 values ('2001-01-01 1:1:1', '1:1:1'),
+('2001-01-01 1:1:1', '1:1:1');
+insert into t2 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1');
+flush tables;
+EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
+flush tables;
+SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
+flush tables;
+EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN ( SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.t < '2005-11-13 7:41:31' ); 
+flush tables;
+SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN ( SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.t < '2005-11-13 7:41:31' );
+drop tables t1, t2;
+
 # End of 5.0 tests.