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SET AUTOCOMMIT = 0
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START TRANSACTION
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DROP DATABASE IF EXISTS `base`
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CREATE DATABASE `base`
DEFAULT CHARACTER SET `latin1`
DEFAULT COLLATE `latin1_general_ci`
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DROP TABLE IF EXISTS `test`
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CREATE TABLE `test`
( `id` integer unsigned not null auto_increment primary key,
`lib` varchar(255) not null
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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DROP TRIGGER IF EXISTS `verify_1`
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CREATE TRIGGER `verify_1`
BEFORE DELETE ON `test`
FOR EACH ROW
BEGIN
DECLARE _msg varchar(255);
IF (old.id = 3) then
set _msg = concat('ID=3, suppression interdite !');
SIGNAL SQLSTATE VALUE '07777' SET MESSAGE_TEXT = _msg, MYSQL_ERRNO = 7777;
END IF;
END
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DROP TRIGGER IF EXISTS `verify_2`
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CREATE TRIGGER `verify_2`
BEFORE UPDATE ON `test`
FOR EACH ROW
BEGIN
DECLARE _msg varchar(255);
IF (old.id = 3) then
set _msg = concat('ID=3, modification interdite !');
SIGNAL SQLSTATE VALUE '08888' SET MESSAGE_TEXT = _msg, MYSQL_ERRNO = 8888;
END IF;
END
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INSERT INTO `test` (`lib`) VALUES
('un'),('deux'),('trois'),('quatre'),('cinq')
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select * from `test`
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+----+--------+
| id | lib |
+----+--------+
| 1 | un |
| 2 | deux |
| 3 | trois |
| 4 | quatre |
| 5 | cinq |
+----+--------+
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delete from `test` where id = 2
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delete from `test` where id = 3
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ERROR 7777 (07777) at line 83: ID=3, suppression interdite !
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update `test` set lib = 'vingt-cinq' where id=1
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update `test` set lib = 'dix mille' where id=3
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ERROR 8888 (08888) at line 86: ID=3, modification interdite !
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select * from `test`
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+----+------------+
| id | lib |
+----+------------+
| 1 | vingt-cinq |
| 3 | trois |
| 4 | quatre |
| 5 | cinq |
+----+------------+
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COMMIT
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SET AUTOCOMMIT = 1
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