drop table if exists t1;
CREATE TABLE t1 (
a int not null,
b int not null,
c int not null,
primary key(a,b))
partition by hash (a + 2)
partitions 3
(partition x1 tablespace ts1,
partition x2 tablespace ts2,
partition x3 tablespace ts3);
insert into t1 values (1,1,1);
insert into t1 values (2,1,1);
insert into t1 values (3,1,1);
insert into t1 values (4,1,1);
insert into t1 values (5,1,1);
select * from t1;
a	b	c
1	1	1
4	1	1
2	1	1
5	1	1
3	1	1
update t1 set c=3 where b=1;
select * from t1;
a	b	c
1	1	3
4	1	3
2	1	3
5	1	3
3	1	3
select b from t1 where a=3;
b
1
select b,c from t1 where a=1 AND b=1;
b	c
1	3
delete from t1 where a=1;
delete from t1 where c=3;
select * from t1;
a	b	c
ALTER TABLE t1
partition by hash (a + 3)
partitions 3
(partition x1 tablespace ts1,
partition x2 tablespace ts2,
partition x3 tablespace ts3);
select * from t1;
a	b	c
drop table t1;
CREATE TABLE t1 (
a int not null,
b int not null,
c int not null,
primary key(a,b))
partition by hash (a)
(partition x1);
drop table t1;
CREATE TABLE t1 (
a int not null,
b int not null,
c int not null,
primary key(a,b))
partition by key (a)
(partition x1);
drop table t1;