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create table t1 (a bigint unsigned not null, primary key(a)) engine='MYISAM' partition by key (a) ( partition pa1 max_rows=20 min_rows=2, partition pa2 max_rows=30 min_rows=3, partition pa3 max_rows=30 min_rows=4, partition pa4 max_rows=40 min_rows=2); show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `a` bigint(20) unsigned NOT NULL, PRIMARY KEY (`a`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci PARTITION BY KEY (`a`) (PARTITION `pa1` MAX_ROWS = 20 MIN_ROWS = 2 ENGINE = MyISAM, PARTITION `pa2` MAX_ROWS = 30 MIN_ROWS = 3 ENGINE = MyISAM, PARTITION `pa3` MAX_ROWS = 30 MIN_ROWS = 4 ENGINE = MyISAM, PARTITION `pa4` MAX_ROWS = 40 MIN_ROWS = 2 ENGINE = MyISAM) insert into t1 values (18446744073709551615), (0xFFFFFFFFFFFFFFFE), (18446744073709551613), (18446744073709551612), (1), (2), (65535); select * from t1; a 1 18446744073709551612 18446744073709551613 18446744073709551614 18446744073709551615 2 65535 select * from t1 where a=-2; a delete from t1 where a=-2; select * from t1; a 1 18446744073709551612 18446744073709551613 18446744073709551614 18446744073709551615 2 65535 select * from t1 where a=18446744073709551615; a 18446744073709551615 delete from t1 where a=18446744073709551615; select * from t1; a 1 18446744073709551612 18446744073709551613 18446744073709551614 2 65535 drop table t1; create table t2 (a bigint unsigned not null, primary key(a)) engine='MYISAM' partition by key (a) partitions 8; show create table t2; Table Create Table t2 CREATE TABLE `t2` ( `a` bigint(20) unsigned NOT NULL, PRIMARY KEY (`a`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci PARTITION BY KEY (`a`) PARTITIONS 8 insert into t2 values (18446744073709551615), (0xFFFFFFFFFFFFFFFE), (18446744073709551613), (18446744073709551612); select * from t2; a 18446744073709551612 18446744073709551613 18446744073709551614 18446744073709551615 select * from t2 where a=18446744073709551615; a 18446744073709551615 delete from t2 where a=18446744073709551615; select * from t2; a 18446744073709551612 18446744073709551613 18446744073709551614 delete from t2; 65535 inserts; select count(*) from t2; count(*) 65535 drop table t2; create table t3 (a bigint not null, primary key(a)) engine='MYISAM' partition by key (a) partitions 7; show create table t3; Table Create Table t3 CREATE TABLE `t3` ( `a` bigint(20) NOT NULL, PRIMARY KEY (`a`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci PARTITION BY KEY (`a`) PARTITIONS 7 insert into t3 values (9223372036854775807), (9223372036854775806), (9223372036854775805), (9223372036854775804), (-9223372036854775808), (-9223372036854775807), (1), (-1), (0); select * from t3; a -1 -9223372036854775807 -9223372036854775808 0 1 9223372036854775804 9223372036854775805 9223372036854775806 9223372036854775807 select * from t3 where a=9223372036854775806; a 9223372036854775806 delete from t3 where a=9223372036854775806; select * from t3; a -1 -9223372036854775807 -9223372036854775808 0 1 9223372036854775804 9223372036854775805 9223372036854775807 drop table t3;