Bug#33266: Incorrect test case for the bug#31048 failing on some platforms.

The test case for the bug#31048 checks that there is no crash on stack
overrun. But due to different stack sizes on different platforms it failed
on some of them.

The new test case check that a query with at least 4 level subquery nesting
works without the stack overrun nesting and other levels of nesting doesn't
cause a crash.


mysql-test/t/subselect.test:
  Corrected test case for the bug#31048.
mysql-test/r/subselect.result:
  Corrected test case for the bug#31048.

mysql-test/r/subselect.result

@@ -4147,103 +4147,37 @@ 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	range	a	a	5	NULL	9	Using where; Using temporary; Using filesort
-3	SUBQUERY	t1	range	a	a	5	NULL	9	Using where; Using temporary; Using filesort
-4	SUBQUERY	t1	range	a	a	5	NULL	9	Using where; Using temporary; Using filesort
-5	SUBQUERY	t1	range	a	a	5	NULL	9	Using where; Using temporary; Using filesort
-6	SUBQUERY	t1	range	a	a	5	NULL	9	Using where; Using temporary; Using filesort
-7	SUBQUERY	t1	range	a	a	5	NULL	9	Using where; Using temporary; Using filesort
-8	SUBQUERY	t1	range	a	a	5	NULL	9	Using where; Using temporary; Using filesort
-9	SUBQUERY	t1	range	a	a	5	NULL	9	Using where; Using temporary; Using filesort
-10	SUBQUERY	t1	range	a	a	5	NULL	9	Using where; Using temporary; Using filesort
-11	SUBQUERY	t1	range	a	a	5	NULL	9	Using where; Using temporary; 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
+5
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+1
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+1
 drop table t1;
 CREATE TABLE t1 (a1 INT, a2 INT);
 CREATE TABLE t2 (b1 INT, b2 INT);

mysql-test/t/subselect.test

@@ -3006,92 +3006,44 @@ 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);
-# 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;
+
+let $nesting= 26;
+let $should_work_nesting= 5;
+let $start= select sum(a),a from t1 where a> ( select sum(a) from t1 ;
+let $end= )group by a ;
+let $start_app= where a> ( select sum(a) from t1 ;
+let $end_pre= )group by b limit 1 ;
+
+--disable_result_log
+--disable_query_log
+# At least 4 level nesting should work without errors
+while ($should_work_nesting)
+{
+--echo $should_work_nesting
+  eval $start $end;
+  eval explain $start $end;
+  let $start= $start
+  $start_app;
+  let $end= $end_pre
+  $end;
+  dec $should_work_nesting;
+}
+# Other may fail with the 'stack overrun error'
+while ($nesting)
+{
+--echo $nesting
+--error 0,1436
+  eval $start $end;
+--error 0,1436
+  eval explain $start $end;
+  let $start= $start
+  $start_app;
+  let $end= $end_pre
+  $end;
+  dec $nesting;
+}
+--enable_result_log
+--enable_query_log
 drop table t1;
 
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