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drop database if exists mysqltest1; create schema foo; show create schema foo; Database Create Database foo CREATE DATABASE `foo` /*!40100 DEFAULT CHARACTER SET latin1 */ show schemas; Database information_schema foo mtr mysql performance_schema test drop schema foo; # # Bug #48940 MDL deadlocks against mysql_rm_db # DROP SCHEMA IF EXISTS schema1; # Connection default CREATE SCHEMA schema1; CREATE TABLE schema1.t1 (a INT); SET autocommit= FALSE; INSERT INTO schema1.t1 VALUES (1); # Connection 2 DROP SCHEMA schema1; # Connection default ALTER SCHEMA schema1 DEFAULT CHARACTER SET utf8; Got one of the listed errors SET autocommit= TRUE; # Connection 2 # Connection default # # Bug #49988 MDL deadlocks with mysql_create_db, reload_acl_and_cache # DROP SCHEMA IF EXISTS schema1; # Connection default CREATE SCHEMA schema1; CREATE TABLE schema1.t1 (id INT); LOCK TABLE schema1.t1 WRITE; # Connection con2 DROP SCHEMA schema1; # Connection default # CREATE SCHEMA used to give a deadlock. # Now we prohibit CREATE SCHEMA in LOCK TABLES mode. CREATE SCHEMA IF NOT EXISTS schema1; ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction # UNLOCK TABLES so DROP SCHEMA can continue. UNLOCK TABLES; # Connection con2 # Connection default # # Bug#54360 Deadlock DROP/ALTER/CREATE DATABASE with open HANDLER # CREATE DATABASE db1; CREATE TABLE db1.t1 (a INT); INSERT INTO db1.t1 VALUES (1), (2); # Connection con1 HANDLER db1.t1 OPEN; # Connection default # Sending: DROP DATABASE db1; # Connection con2 # Connection con1 CREATE DATABASE db2; ALTER DATABASE db2 DEFAULT CHARACTER SET utf8; DROP DATABASE db2; HANDLER t1 CLOSE; # Connection default # Reaping: DROP DATABASE db1 # # Tests for increased CREATE/ALTER/DROP DATABASE concurrency with # database name locks. # DROP DATABASE IF EXISTS db1; DROP DATABASE IF EXISTS db2; # Connection default CREATE DATABASE db1; CREATE TABLE db1.t1 (id INT); START TRANSACTION; INSERT INTO db1.t1 VALUES (1); # Connection 2 # DROP DATABASE should block due to the active transaction # Sending: DROP DATABASE db1; # Connection 3 # But it should still be possible to CREATE/ALTER/DROP other databases. CREATE DATABASE db2; ALTER DATABASE db2 DEFAULT CHARACTER SET utf8; DROP DATABASE db2; # Connection default # End the transaction so DROP DATABASE db1 can continue COMMIT; # Connection 2 # Reaping: DROP DATABASE db1 # Connection default;