mariadb/mysql-test/t/partition_mgm.test

--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
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;

#--exec ls $MYSQLTEST_VARDIR/master-data/test/t1*
ALTER TABLE t1 COALESCE PARTITION 1;
SHOW CREATE TABLE t1;
#--exec ls $MYSQLTEST_VARDIR/master-data/test/t1*