drop table if exists t1, t2;
CREATE TABLE t1
(
id INT PRIMARY KEY,
number INT,
string VARCHAR(20),
UNIQUE INDEX (number)
) ENGINE=pbxt;
truncate table t1;
insert t1 values (1, 1, 'abc');
begin;
update t1 set string = 'def' where id = 1;
update t1 set string = 'HIJ' where id = 1;
select * from t1 where id = 1;
id	number	string
1	1	HIJ
select * from t1 where number = 1;
id	number	string
1	1	HIJ
update t1 set string = '123', number=2  where id = 1;
select * from t1 where id = 1;
id	number	string
1	2	123
select * from t1 where number = 2;
id	number	string
1	2	123
commit;
insert t1 values (2, 2, 'abc');
ERROR 23000: Duplicate entry '2' for key 'number'
insert t1 values (2, 3, 'abc');
select * from t1 order by id;
id	number	string
1	2	123
2	3	abc
begin;
update t1 set number = 1 where id = 1;
select * from t1 order by id;
id	number	string
1	1	123
2	3	abc
update t1 set number = 3 where id = 1;
ERROR 23000: Duplicate entry '3' for key 'number'
select * from t1 where id = 1;
id	number	string
1	1	123
select * from t1 where id = 2;
id	number	string
2	3	abc
select * from t1 where number = 1;
id	number	string
1	1	123
select * from t1 where number = 3;
id	number	string
2	3	abc
select * from t1 order by id;
id	number	string
1	1	123
2	3	abc
commit;
select * from t1 order by id;
id	number	string
1	1	123
2	3	abc
drop table t1;
CREATE TABLE t1
(
id INT PRIMARY KEY,
number INT,
string VARCHAR(300),
UNIQUE INDEX (number)
) ENGINE=pbxt;
truncate table t1;
insert t1 values (1, 1, 'abc01234567890123456789012345678901234567890123456789$$$');
begin;
update t1 set string = 'def01234567890123456789012345678901234567890123456789---' where id = 1;
update t1 set string = 'HIJ01234567890123456789012345678901234567890123456789***' where id = 1;
select * from t1 where id = 1;
id	number	string
1	1	HIJ01234567890123456789012345678901234567890123456789***
select * from t1 where number = 1;
id	number	string
1	1	HIJ01234567890123456789012345678901234567890123456789***
update t1 set string = '12301234567890123456789012345678901234567890123456789+++', number=2  where id = 1;
select * from t1 where id = 1;
id	number	string
1	2	12301234567890123456789012345678901234567890123456789+++
select * from t1 where number = 2;
id	number	string
1	2	12301234567890123456789012345678901234567890123456789+++
commit;
insert t1 values (2, 2, 'abc01234567890123456789012345678901234567890123456789===');
ERROR 23000: Duplicate entry '2' for key 'number'
insert t1 values (2, 3, 'abc01234567890123456789012345678901234567890123456789+++');
select * from t1 order by id;
id	number	string
1	2	12301234567890123456789012345678901234567890123456789+++
2	3	abc01234567890123456789012345678901234567890123456789+++
begin;
update t1 set number = 1 where id = 1;
select * from t1 order by id;
id	number	string
1	1	12301234567890123456789012345678901234567890123456789+++
2	3	abc01234567890123456789012345678901234567890123456789+++
update t1 set number = 3 where id = 1;
ERROR 23000: Duplicate entry '3' for key 'number'
select * from t1 where id = 1;
id	number	string
1	1	12301234567890123456789012345678901234567890123456789+++
select * from t1 where id = 2;
id	number	string
2	3	abc01234567890123456789012345678901234567890123456789+++
select * from t1 where number = 1;
id	number	string
1	1	12301234567890123456789012345678901234567890123456789+++
select * from t1 where number = 3;
id	number	string
2	3	abc01234567890123456789012345678901234567890123456789+++
select * from t1 order by id;
id	number	string
1	1	12301234567890123456789012345678901234567890123456789+++
2	3	abc01234567890123456789012345678901234567890123456789+++
rollback;
select * from t1 order by id;
id	number	string
1	2	12301234567890123456789012345678901234567890123456789+++
2	3	abc01234567890123456789012345678901234567890123456789+++
drop table t1;
DROP TABLE IF EXISTS t1;
Warnings:
Note	1051	Unknown table 't1'
CREATE TABLE t1 ( id int, name varchar(300)) engine=pbxt;
begin;
insert t1(id, name) values(1, "aaa");
update t1 set name=REPEAT('A', 300) where id = 1;
commit;
select * from t1;
id	name
1	AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
drop table t1;