Create 'main' test directory and move 't' and 'r' there

mysql-test/main/subselect_notembedded.test

@@ -0,0 +1,62 @@
+-- source include/not_embedded.inc
+
+#
+# BUG#10308: purge log with subselect
+# Bug#28553: mysqld crash in "purge master log before(select time from information_schema)"
+#
+--error 1064
+purge master logs before (select adddate(current_timestamp(), interval -4 day));
+purge master logs before adddate(current_timestamp(), interval -4 day);
+
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+#
+# 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);
+
+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 select $should_work_nesting as 'STEP-1';
+  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
+  eval select $nesting as 'STEP-2';
+--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;
+
+--echo End of 5.1 tests