Many files:

  Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.


mysql-test/r/subselect.result:
  Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.
mysql-test/r/subselect_notembedded.result:
  Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.
mysql-test/t/subselect.test:
  Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.
mysql-test/t/subselect_notembedded.test:
  Test case for the bug#31048 is moved to the subselect_notembedded tests as the embedded server isn't affected by this bug.

4 files changed, 197 insertions, 195 deletions

diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result
index ecfc069aa45..bf320e585d6 100644
--- a/mysql-test/r/subselect.result
+++ b/mysql-test/r/subselect.result
@@ -4140,107 +4140,6 @@ SELECT (SELECT SUM(t1.a) FROM t2 WHERE a=1) FROM t1;
 (SELECT SUM(t1.a) FROM t2 WHERE a=1)
 3
 DROP TABLE t1,t2;
-create table t1(a int,b int,key(a),key(b));
-insert into t1(a,b) values (1,2),(2,1),(2,3),(3,4),(5,4),(5,5),
-(6,7),(7,4),(5,3);
-select sum(a),a from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1
-)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1) 
-group by a;
-sum(a)	a
-select sum(a),a from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1) 
-group by a;
-ERROR HY000: Thread stack overrun detected
-explain select sum(a),a from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 
-)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1) 
-group by a;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	index	a	a	5	NULL	9	Using where; Using index
-2	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-3	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-4	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-5	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-6	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-7	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-8	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-9	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-10	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-11	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
-12	SUBQUERY	t1	range	a	a	5	NULL	1	Using where; Using temporary; Using filesort
-13	SUBQUERY	t1	index	NULL	a	5	NULL	9	Using index
-explain select sum(a),a from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-select sum(a) from t1 
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1
-)group by b limit 1)group by b limit 1)group by b limit 1) 
-group by a;
-ERROR HY000: Thread stack overrun detected
-drop table t1;
 CREATE TABLE t1 (a1 INT, a2 INT);
 CREATE TABLE t2 (b1 INT, b2 INT);
 INSERT INTO t1 VALUES (100, 200);
diff --git a/mysql-test/r/subselect_notembedded.result b/mysql-test/r/subselect_notembedded.result
index 44ae055425e..90aadcae398 100644
--- a/mysql-test/r/subselect_notembedded.result
+++ b/mysql-test/r/subselect_notembedded.result
@@ -1,3 +1,104 @@
 purge master logs before (select adddate(current_timestamp(), interval -4 day));
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'select adddate(current_timestamp(), interval -4 day))' at line 1
 purge master logs before adddate(current_timestamp(), interval -4 day);
+create table t1(a int,b int,key(a),key(b));
+insert into t1(a,b) values (1,2),(2,1),(2,3),(3,4),(5,4),(5,5),
+(6,7),(7,4),(5,3);
+select sum(a),a from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1
+)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1) 
+group by a;
+sum(a)	a
+select sum(a),a from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1) 
+group by a;
+ERROR HY000: Thread stack overrun detected
+explain select sum(a),a from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 
+)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1) 
+group by a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	index	a	a	5	NULL	9	Using where; Using index
+2	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+3	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+4	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+5	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+6	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+7	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+8	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+9	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+10	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+11	SUBQUERY	t1	index	a	b	5	NULL	9	Using where; Using filesort
+12	SUBQUERY	t1	range	a	a	5	NULL	1	Using where; Using temporary; Using filesort
+13	SUBQUERY	t1	index	NULL	a	5	NULL	9	Using index
+explain select sum(a),a from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+select sum(a) from t1 
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1
+)group by b limit 1)group by b limit 1)group by b limit 1) 
+group by a;
+ERROR HY000: Thread stack overrun detected
+drop table t1;
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index 3af2ec1891d..077e00a4c6e 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -3001,100 +3001,6 @@ SELECT (SELECT SUM(t1.a) FROM t2 WHERE a=1) FROM t1;
 DROP TABLE t1,t2;
 
 #
-# Bug31048: Many nested subqueries may cause server crash.
-#
-create table t1(a int,b int,key(a),key(b));
-insert into t1(a,b) values (1,2),(2,1),(2,3),(3,4),(5,4),(5,5),
-  (6,7),(7,4),(5,3);
-# test for the stack overflow bug
-select sum(a),a from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1
-  )group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1) 
-group by a;
---replace_regex /overrun.*$/overrun detected/
---error 1436
-select sum(a),a from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1) 
-group by a;
-# test for the memory consumption & subquery slowness bug
-explain select sum(a),a from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 
-  )group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1) 
-group by a;
---replace_regex /overrun.*$/overrun detected/
---error 1436
-explain select sum(a),a from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
-  select sum(a) from t1 
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1
-  )group by b limit 1)group by b limit 1)group by b limit 1) 
-group by a;
-drop table t1;
-
-#
 # Bug #31884: Assertion + crash in subquery in the SELECT clause.
 #
 
diff --git a/mysql-test/t/subselect_notembedded.test b/mysql-test/t/subselect_notembedded.test
index c112272e8ad..040c90452b9 100644
--- a/mysql-test/t/subselect_notembedded.test
+++ b/mysql-test/t/subselect_notembedded.test
@@ -7,3 +7,99 @@
 --error 1064
 purge master logs before (select adddate(current_timestamp(), interval -4 day));
 purge master logs before adddate(current_timestamp(), interval -4 day);
+
+#
+# Bug31048: Many nested subqueries may cause server crash.
+#
+create table t1(a int,b int,key(a),key(b));
+insert into t1(a,b) values (1,2),(2,1),(2,3),(3,4),(5,4),(5,5),
+  (6,7),(7,4),(5,3);
+# test for the stack overflow bug
+select sum(a),a from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1
+  )group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1) 
+group by a;
+--replace_regex /overrun.*$/overrun detected/
+--error 1436
+select sum(a),a from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1) 
+group by a;
+# test for the memory consumption & subquery slowness bug
+explain select sum(a),a from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 
+  )group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1) 
+group by a;
+--replace_regex /overrun.*$/overrun detected/
+--error 1436
+explain select sum(a),a from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 where a> ( select sum(a) from t1 where a> (
+  select sum(a) from t1 
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1
+  )group by b limit 1)group by b limit 1)group by b limit 1) 
+group by a;
+drop table t1;
+
+