[MDEV-19856] Lock on temporary table exists, even after the table was dropped. Created: 2019-06-25  Updated: 2023-04-27

Status: Open
Project: MariaDB Server
Component/s: None
Affects Version/s: 5.5, 10.0, 10.1, 10.2, 10.3, 10.4
Fix Version/s: 10.4

Type: Bug Priority: Major
Reporter: Alice Sherepa Assignee: Oleksandr Byelkin
Resolution: Unresolved Votes: 0
Labels: None


 Description   

MariaDB [test]> create  table t2 (a int);
Query OK, 0 rows affected (0.062 sec)
 
MariaDB [test]> create temporary table t1 (a int);
Query OK, 0 rows affected (0.013 sec)
 
MariaDB [test]> lock table t1 write;
Query OK, 0 rows affected (0.001 sec)
 
MariaDB [test]> drop temporary table t1;
Query OK, 0 rows affected (0.007 sec)
 
MariaDB [test]> select * from t2; 
ERROR 1100 (HY000): Table 't2' was not locked with LOCK TABLES

Compare with not-temorary table:

MariaDB [test]> create  table t2 (a int);
Query OK, 0 rows affected (0.054 sec)
 
MariaDB [test]> create table t1 (a int);
Query OK, 0 rows affected (0.048 sec)
 
MariaDB [test]> lock table t1 write;
Query OK, 0 rows affected (0.001 sec)
 
MariaDB [test]> drop table t1;
Query OK, 0 rows affected (0.025 sec)
 
MariaDB [test]> select * from t2;
Empty set (0.005 sec)


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