DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (f_date DATE, f_varchar VARCHAR(30))
PARTITION BY HASH(CAST(YEAR(f_date) AS SIGNED INTEGER)) PARTITIONS 2;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f_date` date DEFAULT NULL,
  `f_varchar` varchar(30) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 PARTITION BY HASH (CAST(YEAR(f_date) AS SIGNED INTEGER)) PARTITIONS 2 
ALTER TABLE t1 COALESCE PARTITION 1;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f_date` date DEFAULT NULL,
  `f_varchar` varchar(30) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 PARTITION BY HASH (CAST(YEAR(f_date) AS SIGNED INTEGER)) PARTITIONS 1