Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.0-bugteam

into  magare.gmz:/home/kgeorge/mysql/autopush/B36011-take2-5.0-bugteam

mysql-test/r/subselect.result

@@ -4381,4 +4381,19 @@ t1.a= (select b from t2 limit 1) and not
 t1.a= (select a from t2 limit 1) ;
 a
 drop table t1, t2;
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2);
+EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 GROUP BY a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
+2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	Using temporary; Using filesort
+Warnings:
+Note	1003	select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,<exists>(select 1 AS `1` from `test`.`t1` group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(1))))
+EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 WHERE a > 3 GROUP BY a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where; Using temporary; Using filesort
+Warnings:
+Note	1003	select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,<exists>(select 1 AS `1` from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(1))))
+DROP TABLE t1;
 End of 5.0 tests.

mysql-test/t/subselect.test

@@ -3271,5 +3271,16 @@ select t1.a from t1 where
 
 drop table t1, t2;
 
+#
+# Bug #36011: Server crash with explain extended on query with dependent
+# subqueries
+#
+
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2);
+EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 GROUP BY a);
+EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 WHERE a > 3 GROUP BY a);
+DROP TABLE t1;
+
 --echo End of 5.0 tests.
 

sql/sql_select.cc

@@ -2104,11 +2104,12 @@ JOIN::exec()
   /* 
     With EXPLAIN EXTENDED we have to restore original ref_array
     for a derived table which is always materialized.
+    We also need to do this when we have temp table(s).
     Otherwise we would not be able to print the query correctly.
   */ 
-  if (items0 &&
-      (thd->lex->describe & DESCRIBE_EXTENDED) &&
-      select_lex->linkage == DERIVED_TABLE_TYPE)      
+  if (items0 && (thd->lex->describe & DESCRIBE_EXTENDED) &&
+      (select_lex->linkage == DERIVED_TABLE_TYPE ||
+       exec_tmp_table1 || exec_tmp_table2))
     set_items_ref_array(items0);
 
   DBUG_VOID_RETURN;