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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 like 'foo';
Database (foo)
foo
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;