1
2#
3# MDEV-4029 SELECT on information_schema using a subquery locks up the information_schema table due to incorrect mutexes handling
4#
5select variable_name from information_schema.session_status where variable_name =
6(select variable_name from information_schema.session_status where variable_name = 'uptime');
7select variable_name from information_schema.session_variables where variable_name =
8(select variable_name from information_schema.session_variables where variable_name = 'basedir');
9
10#
11# MDEV-8796 Delete with sub query with information_schema.TABLES deletes too many rows
12#
13create table t1 (x int);
14create table t2 (x int);
15create table t3 (x int);
16create table t4 AS select table_name from information_schema.TABLES where table_schema = database() and table_type = 'BASE TABLE' ;
17delete from t4 where table_name not in (select table_name from information_schema.TABLES where table_schema = database() and table_type = 'BASE TABLE');
18select * from t4 order by table_name;
19drop table t1, t2, t3, t4;
20