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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,
`libelle` char(20) NOT NULL,
`age` integer unsigned NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `test` (`libelle`,`age`) values ('un', 33),('deux', 16),('trois',12),('quatre',47)
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select * from test
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+----+---------+-----+
| id | libelle | age |
+----+---------+-----+
| 1 | un | 33 |
| 2 | deux | 16 |
| 3 | trois | 12 |
| 4 | quatre | 47 |
+----+---------+-----+
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DROP PROCEDURE IF EXISTS identify_1
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CREATE PROCEDURE identify_1 ()
DETERMINISTIC
NO SQL
BEGIN
DECLARE _id INTEGER DEFAULT 0;
DECLARE _fin INTEGER DEFAULT 1;
DECLARE _tab CURSOR FOR SELECT id from test where age > 25;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET _fin = 0;
CREATE TEMPORARY TABLE `temp_id`
( `id` INTEGER UNSIGNED PRIMARY KEY
) engine=InnoDB;
OPEN _tab;
FETCH _tab INTO _id;
WHILE (_fin)
DO
UPDATE `test` SET libelle='modification' where id=_id;
INSERT INTO `temp_id` (`id`) values (_id);
FETCH _tab INTO _id;
END WHILE;
SELECT id from temp_id;
DROP TABLE `temp_id`;
END
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CALL identify_1()
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+----+
| id |
+----+
| 1 |
| 4 |
+----+
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select * from test
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+----+--------------+-----+
| id | libelle | age |
+----+--------------+-----+
| 1 | modification | 33 |
| 2 | deux | 16 |
| 3 | trois | 12 |
| 4 | modification | 47 |
+----+--------------+-----+
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drop table `temp_id2`
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ERROR 1051 (42S02) at line 90: Table 'base.temp_id2' inconnue
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CREATE TABLE `temp_id2`
( `id` INTEGER UNSIGNED PRIMARY KEY
) engine=InnoDB
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DROP TRIGGER IF EXISTS identify_2
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CREATE TRIGGER identify_2
BEFORE UPDATE ON `test`
FOR EACH ROW BEGIN
DECLARE _id INTEGER DEFAULT 0;
SELECT id INTO _id FROM test WHERE age=old.age;
INSERT INTO `temp_id2` (`id`) VALUES (_id);
END
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TRUNCATE TABLE temp_id2
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update `test` set libelle='blablabla' where age>25
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select * from test
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+----+-----------+-----+
| id | libelle | age |
+----+-----------+-----+
| 1 | blablabla | 33 |
| 2 | deux | 16 |
| 3 | trois | 12 |
| 4 | blablabla | 47 |
+----+-----------+-----+
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select * from temp_id2
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+----+
| id |
+----+
| 1 |
| 4 |
+----+
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DROP TABLE `temp_id2`
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COMMIT
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SET AUTOCOMMIT = 1
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