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# InnoDB supports native partitioning and is required by the test. CREATE TABLE t1 (a int) ENGINE = InnoDB PARTITION BY HASH (a) PARTITIONS 2; INSERT INTO t1 VALUES (1); SELECT * FROM t1; a 1 SHOW CREATE TABLE t1; Table Create Table t1 CREATE TABLE `t1` ( `a` int(11) DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY HASH (a) PARTITIONS 2 */ DROP TABLE t1; # MyISAM requires ha_partition to support partitioning. CREATE TABLE t1 (a int) ENGINE = MyISAM PARTITION BY HASH (a) PARTITIONS 2; ERROR HY000: The 'partitioning' feature is not available; you need to remove '--skip-partition' or use MySQL built with '-DWITH_PARTITION_STORAGE_ENGINE=1' INSTALL PLUGIN `partition` SONAME 'ha_partition.so'; SELECT PLUGIN_NAME, PLUGIN_VERSION, PLUGIN_STATUS, PLUGIN_TYPE, PLUGIN_LIBRARY, PLUGIN_AUTHOR, PLUGIN_DESCRIPTION, PLUGIN_LICENSE, LOAD_OPTION FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME LIKE 'PARTITION'; PLUGIN_NAME PLUGIN_VERSION PLUGIN_STATUS PLUGIN_TYPE PLUGIN_LIBRARY PLUGIN_AUTHOR PLUGIN_DESCRIPTION PLUGIN_LICENSE LOAD_OPTION partition 1.0 ACTIVE STORAGE ENGINE ha_partition.so Mikael Ronstrom, MySQL AB Partition Storage Engine Helper GPL ON INSTALL PLUGIN `PARTITION` SONAME 'ha_partition.so'; ERROR HY000: Function 'PARTITION' already exists CREATE TABLE t1 (a int) ENGINE = MyISAM PARTITION BY HASH (a) PARTITIONS 2; INSERT INTO t1 VALUES (1), (2), (3), (4), (5); # UNINSTALL will give a warning since an open table is in the table cache UNINSTALL PLUGIN `partition`; Warnings: Warning 1620 Plugin is busy and will be uninstalled on shutdown # Still working due to UNINSTALL not yet completed SHOW CREATE TABLE t1; Table Create Table t1 CREATE TABLE `t1` ( `a` int(11) DEFAULT NULL ) ENGINE=MyISAM DEFAULT CHARSET=latin1 /*!50100 PARTITION BY HASH (a) PARTITIONS 2 */ SELECT COUNT(*) FROM t1; COUNT(*) 5 SELECT PLUGIN_NAME, PLUGIN_STATUS FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME LIKE 'PARTITION'; PLUGIN_NAME PLUGIN_STATUS partition DELETED SELECT COUNT(*) FROM mysql.plugin; COUNT(*) 0 # FLUSH TABLES will close all tables and allow the UNINSTALL to complete FLUSH TABLES; SELECT COUNT(*) FROM INFORMATION_SCHEMA.PLUGINS WHERE plugin_name = 'partition'; COUNT(*) 0 SELECT COUNT(*) FROM mysql.plugin; COUNT(*) 0 SHOW CREATE TABLE t1; ERROR HY000: The 'partitioning' feature is not available; you need to remove '--skip-partition' or use MySQL built with '-DWITH_PARTITION_STORAGE_ENGINE=1' SELECT COUNT(*) FROM t1; ERROR HY000: The 'partitioning' feature is not available; you need to remove '--skip-partition' or use MySQL built with '-DWITH_PARTITION_STORAGE_ENGINE=1' CREATE TABLE t2 (a int) ENGINE = MyISAM PARTITION BY HASH (a) PARTITIONS 2; ERROR HY000: The 'partitioning' feature is not available; you need to remove '--skip-partition' or use MySQL built with '-DWITH_PARTITION_STORAGE_ENGINE=1' DROP TABLE t1; ERROR HY000: Storage engine for table 'test'.'t1' is not loaded. INSTALL PLUGIN `PARTITION` SONAME 'ha_partition.so'; SELECT PLUGIN_NAME, PLUGIN_VERSION, PLUGIN_STATUS, PLUGIN_TYPE, PLUGIN_LIBRARY, PLUGIN_AUTHOR, PLUGIN_DESCRIPTION, PLUGIN_LICENSE, LOAD_OPTION FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME LIKE 'PARTITION'; PLUGIN_NAME PLUGIN_VERSION PLUGIN_STATUS PLUGIN_TYPE PLUGIN_LIBRARY PLUGIN_AUTHOR PLUGIN_DESCRIPTION PLUGIN_LICENSE LOAD_OPTION partition 1.0 ACTIVE STORAGE ENGINE ha_partition.so Mikael Ronstrom, MySQL AB Partition Storage Engine Helper GPL ON INSTALL PLUGIN `partition` SONAME 'ha_partition.so'; ERROR HY000: Function 'partition' already exists DROP TABLE t1; # Simple partitioned table test CREATE TABLE t1(a int) PARTITION BY HASH (a) PARTITIONS 2; SHOW CREATE TABLE t1; Table Create Table t1 CREATE TABLE `t1` ( `a` int(11) DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY HASH (a) PARTITIONS 2 */ INSERT INTO t1 VALUES (1), (2), (3), (4), (5); ALTER TABLE t1 ADD PARTITION PARTITIONS 1; INSERT INTO t1 VALUES (6), (7), (8); SELECT COUNT(*) FROM t1; COUNT(*) 8 # Cannot drop a partition from a HASH partitioned table ALTER TABLE t1 DROP PARTITION p0; ERROR HY000: DROP PARTITION can only be used on RANGE/LIST partitions ALTER TABLE t1 COALESCE PARTITION 2; ALTER TABLE t1 COALESCE PARTITION 1; ERROR HY000: Cannot remove all partitions, use DROP TABLE instead SHOW CREATE TABLE t1; Table Create Table t1 CREATE TABLE `t1` ( `a` int(11) DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY HASH (a) PARTITIONS 1 */ DROP TABLE t1; UNINSTALL PLUGIN `partition`; UNINSTALL PLUGIN `PARTITION`; ERROR 42000: PLUGIN PARTITION does not exist