mirror of
https://github.com/MariaDB/server.git
synced 2025-01-31 11:01:52 +01:00
142 lines
4.7 KiB
Text
142 lines
4.7 KiB
Text
set @save_check_constraint=@@check_constraint_checks;
|
|
create table t1 (a int check(a>10), b int check (b > 20), constraint `min` check (a+b > 100), constraint `max` check (a+b <500)) engine=myisam;
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) DEFAULT NULL CHECK (`a` > 10),
|
|
`b` int(11) DEFAULT NULL CHECK (`b` > 20),
|
|
CONSTRAINT `min` CHECK (`a` + `b` > 100),
|
|
CONSTRAINT `max` CHECK (`a` + `b` < 500)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
insert into t1 values (100,100);
|
|
insert into t1 values (1,1);
|
|
ERROR 23000: CONSTRAINT `a` failed for `test`.`t1`
|
|
insert into t1 values (20,1);
|
|
ERROR 23000: CONSTRAINT `b` failed for `test`.`t1`
|
|
insert into t1 values (20,30);
|
|
ERROR 23000: CONSTRAINT `min` failed for `test`.`t1`
|
|
insert into t1 values (500,500);
|
|
ERROR 23000: CONSTRAINT `max` failed for `test`.`t1`
|
|
insert into t1 values (101,101),(102,102),(600,600),(103,103);
|
|
ERROR 23000: CONSTRAINT `max` failed for `test`.`t1`
|
|
select * from t1;
|
|
a b
|
|
100 100
|
|
101 101
|
|
102 102
|
|
truncate table t1;
|
|
insert ignore into t1 values (101,101),(102,102),(600,600),(103,103);
|
|
Warnings:
|
|
Warning 4025 CONSTRAINT `max` failed for `test`.`t1`
|
|
select * from t1;
|
|
a b
|
|
101 101
|
|
102 102
|
|
103 103
|
|
set check_constraint_checks=0;
|
|
truncate table t1;
|
|
insert into t1 values (101,101),(102,102),(600,600),(103,103);
|
|
select * from t1;
|
|
a b
|
|
101 101
|
|
102 102
|
|
600 600
|
|
103 103
|
|
set check_constraint_checks=@save_check_constraint;
|
|
alter table t1 add c int default 0 check (c < 10);
|
|
ERROR 23000: CONSTRAINT `max` failed for table
|
|
set check_constraint_checks=0;
|
|
alter table t1 add c int default 0 check (c < 10);
|
|
alter table t1 add check (a+b+c < 500);
|
|
set check_constraint_checks=@save_check_constraint;
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) DEFAULT NULL CHECK (`a` > 10),
|
|
`b` int(11) DEFAULT NULL CHECK (`b` > 20),
|
|
`c` int(11) DEFAULT 0 CHECK (`c` < 10),
|
|
CONSTRAINT `min` CHECK (`a` + `b` > 100),
|
|
CONSTRAINT `max` CHECK (`a` + `b` < 500),
|
|
CONSTRAINT `CONSTRAINT_1` CHECK (`a` + `b` + `c` < 500)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
insert into t1 values(105,105,105);
|
|
ERROR 23000: CONSTRAINT `c` failed for `test`.`t1`
|
|
insert into t1 values(249,249,9);
|
|
ERROR 23000: CONSTRAINT `CONSTRAINT_1` failed for `test`.`t1`
|
|
insert into t1 values(105,105,9);
|
|
select * from t1;
|
|
a b c
|
|
101 101 0
|
|
102 102 0
|
|
600 600 0
|
|
103 103 0
|
|
105 105 9
|
|
create table t2 like t1;
|
|
show create table t2;
|
|
Table Create Table
|
|
t2 CREATE TABLE `t2` (
|
|
`a` int(11) DEFAULT NULL CHECK (`a` > 10),
|
|
`b` int(11) DEFAULT NULL CHECK (`b` > 20),
|
|
`c` int(11) DEFAULT 0 CHECK (`c` < 10),
|
|
CONSTRAINT `min` CHECK (`a` + `b` > 100),
|
|
CONSTRAINT `max` CHECK (`a` + `b` < 500),
|
|
CONSTRAINT `CONSTRAINT_1` CHECK (`a` + `b` + `c` < 500)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
alter table t2 drop constraint c;
|
|
ERROR 42000: Can't DROP CONSTRAINT `c`; check that it exists
|
|
alter table t2 drop constraint if exists c;
|
|
Warnings:
|
|
Note 1091 Can't DROP CONSTRAINT `c`; check that it exists
|
|
alter table t2 drop constraint min;
|
|
show create table t2;
|
|
Table Create Table
|
|
t2 CREATE TABLE `t2` (
|
|
`a` int(11) DEFAULT NULL CHECK (`a` > 10),
|
|
`b` int(11) DEFAULT NULL CHECK (`b` > 20),
|
|
`c` int(11) DEFAULT 0 CHECK (`c` < 10),
|
|
CONSTRAINT `max` CHECK (`a` + `b` < 500),
|
|
CONSTRAINT `CONSTRAINT_1` CHECK (`a` + `b` + `c` < 500)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
drop table t1,t2;
|
|
create or replace table t1 (a int, b int, constraint check (a>b));
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) DEFAULT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
CONSTRAINT `CONSTRAINT_1` CHECK (`a` > `b`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
create or replace table t1 (a int, b int,
|
|
constraint CONSTRAINT_1 check (a>1),
|
|
constraint check (b>1));
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) DEFAULT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
CONSTRAINT `CONSTRAINT_1` CHECK (`a` > 1),
|
|
CONSTRAINT `CONSTRAINT_2` CHECK (`b` > 1)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
create or replace table t1 (a int, b int,
|
|
constraint CONSTRAINT_1 check (a>1),
|
|
constraint check (b>1),
|
|
constraint CONSTRAINT_2 check (a>b));
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) DEFAULT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
CONSTRAINT `CONSTRAINT_1` CHECK (`a` > 1),
|
|
CONSTRAINT `CONSTRAINT_3` CHECK (`b` > 1),
|
|
CONSTRAINT `CONSTRAINT_2` CHECK (`a` > `b`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
drop table t1;
|
|
create table t1(c1 int, c2 int as (c1 + 1), check (c2 > 2));
|
|
insert into t1(c1) values(1);
|
|
ERROR 23000: CONSTRAINT `CONSTRAINT_1` failed for `test`.`t1`
|
|
insert into t1(c1) values(2);
|
|
drop table t1;
|
|
create table t1 (a int, b int, check(a>0));
|
|
alter table t1 drop column a;
|
|
ERROR 42S22: Unknown column 'a' in 'CHECK'
|
|
drop table t1;
|