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 /*!50100 PARTITION BY HASH (CAST(YEAR(f_date) AS SIGNED INTEGER)) PARTITIONS 2  */
hello/master-data/test/t1#P#p0.MYD
hello/master-data/test/t1#P#p0.MYI
hello/master-data/test/t1#P#p1.MYD
hello/master-data/test/t1#P#p1.MYI
hello/master-data/test/t1.frm
hello/master-data/test/t1.par
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 /*!50100 PARTITION BY HASH (CAST(YEAR(f_date) AS SIGNED INTEGER)) PARTITIONS 1  */
hello/master-data/test/t1#P#p0.MYD
hello/master-data/test/t1#P#p0.MYI
hello/master-data/test/t1.frm
hello/master-data/test/t1.par