Mathias,
>The syntaxe is here, but the constraints seems not to be checked. Is
this a bug
>? i don't know !
>mysql> create table employee (
>-> name varchar(30),
>-> salary numeric(10,2),
>-> constraint check (salary > 0)
>-> );
>Query OK, 0 rows affected (0.22 sec)
13.2.6 of the 5.0.4 manual says "The CHECK clause is parsed but ignored
by all storage engines."
PB
-----
mfatene@stripped wrote:
>Hi,
>The syntaxe is here, but the constraints seems not to be checked. Is this a bug
>? i don't know !
>
>mysql> create table employee (
> -> name varchar(30),
> -> salary numeric(10,2),
> -> constraint check (salary > 0)
> -> );
>Query OK, 0 rows affected (0.22 sec)
>
>mysql>
>mysql>
>mysql> desc employee
> -> ;
>+--------+---------------+------+-----+---------+-------+
>| Field | Type | Null | Key | Default | Extra |
>+--------+---------------+------+-----+---------+-------+
>| name | varchar(30) | YES | | NULL | |
>| salary | decimal(10,2) | YES | | NULL | |
>+--------+---------------+------+-----+---------+-------+
>2 rows in set (0.03 sec)
>
>mysql> insert into employee value('name 1',0),('name 2',1000)
> -> ;
>Query OK, 2 rows affected (0.05 sec)
>Records: 2 Duplicates: 0 Warnings: 0
>
>mysql> select * from employee;
>+--------+---------+
>| name | salary |
>+--------+---------+
>| name 1 | 0.00 |
>| name 2 | 1000.00 |
>+--------+---------+
>2 rows in set (0.02 sec)
>
>Not null is checked :
>mysql> insert into employee value('name 1',null);
>ERROR 1048 (23000): Column 'salary' cannot be null
>
>But not a not '0' check constraint.
>
>Mathias
>
>Selon Rhino <rhino1@stripped>:
>
>
>
>>Are you sure this kind of constraint is supported in MySQL 4.1?
>>
>>I'm not saying they aren't, I just don't remember. Unless you're sure they
>>are, you should check the manual.
>>
>>Rhino
>>
>>----- Original Message -----
>>From: "Rodrigo Sakai" <rodrigo.sakai@stripped>
>>To: <mysql@stripped>
>>Sent: Friday, May 20, 2005 6:49 PM
>>Subject: constraints
>>
>>
>> Hi, I need to do a constraint that checks if the field 'salary' of one
>>table is not smaller than zero. Like:
>>
>> create table employee (
>>
>> name varchar(30),
>> salary numeric(10,2)
>>
>> constraint ck_salary check (salary > 0)
>> );
>>
>> What´s the sintaxe? I'am not finding the correct sintaxe to do this
>>constraint.
>>
>> I'm using MySQL 4.1
>>
>>
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>
>
>
>
>
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