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Re: IF / THAN in tiggers not working on 5.0.13-rc-nt-log ?
Posted by: Roland Bouman
Date: October 23, 2005 01:54AM

Waddaya mean, 'not work'? isnt the trigger fired? when you update a row? Or could you not get mysql to compile?

delimiter //
CREATE TABLE account (acct_num INT, amount DECIMAL(10,2))
//
CREATE TRIGGER upd_check BEFORE UPDATE ON account
FOR EACH ROW
BEGIN
IF NEW.amount < 0 THEN
SET NEW.amount = 0;
END IF;
END
//


mysql> insert into account values (1,-1);
-> //
Query OK, 1 row affected (0.05 sec)

mysql> select * from account
-> //
+----------+--------+
| acct_num | amount |
+----------+--------+
| 1 | -1.00 |
+----------+--------+
1 row in set (0.02 sec)

mysql> update account set amount = -2
-> //
Query OK, 1 row affected (0.06 sec)
Rows matched: 1 Changed: 1 Warnings: 0

mysql> select * from account
-> //
+----------+--------+
| acct_num | amount |
+----------+--------+
| 1 | 0.00 |
+----------+--------+
1 row in set (0.00 sec)

mysql> select version()
-> //

+--------------+
| version() |
+--------------+
| 5.0.13-rc-nt |
+--------------+
1 row in set (0.00 sec)

As you can see, it works for me.

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Re: IF / THAN in tiggers not working on 5.0.13-rc-nt-log ?
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October 23, 2005 01:54AM


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