For some reason, on a MySQL 5.5.30 machine, a trigger which deletes a row from a second table does no longer fire the delete trigger on the second table.
This works perfectly on our local MySQL version 5.5.25
I did not find any documentation that would explain this behaviour, does somebody maybe have an equal problem?
This is either a bug which occurs in MySQL version greater than 5.5.25 or a "feature" which is enabled accidently.
UPDATE table1 => fires BEFORE UPDATE trigger ON table1
table1 BEFORE UPDATE TRIGGER executes: DELETE FROM table2 => should fire BEFORE DELETE trigger on table2 ( but doesn't )
table 2 BEFORE DELETE TRIGGER executes: DELETE FROM table3 (never happens)
OK here my reproduce steps:
Database
CREATE DATABASE "triggerTest" DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
Tables
CREATE TABLE "table1" (
"id" int(11) NOT NULL AUTO_INCREMENT,
"active" tinyint(1) NOT NULL DEFAULT '0',
"sampleData" varchar(100) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
PRIMARY KEY ("id")
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci ROW_FORMAT=DYNAMIC;
CREATE TABLE "table2" (
"id" int(11) NOT NULL AUTO_INCREMENT,
"table1_id" int(11) NOT NULL DEFAULT '0',
PRIMARY KEY ("id"),
CONSTRAINT "test2_fk_table1_id" FOREIGN KEY ("table1_id") REFERENCES "table1" ("id") ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci ROW_FORMAT=DYNAMIC;
CREATE TABLE "table3" (
"id" int(11) NOT NULL AUTO_INCREMENT,
"table1_id" int(11) NOT NULL DEFAULT '0',
PRIMARY KEY ("id"),
CONSTRAINT "test3_fk_table1_id" FOREIGN KEY ("table1_id") REFERENCES "table1" ("id") ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci ROW_FORMAT=DYNAMIC;
Triggers
DELIMITER $$
CREATE TRIGGER "table1_rtrg_AI" AFTER INSERT ON "table1" FOR EACH ROW
BEGIN
IF NEW."active" THEN
INSERT INTO "table2" ( "table1_id" ) SELECT NEW."id";
END IF;
END$$
CREATE TRIGGER "table1_rtrg_BU" BEFORE UPDATE ON "table1" FOR EACH ROW
BEGIN
IF NOT NEW."active" AND OLD."active" THEN
DELETE FROM "table2" WHERE "table1_id" = OLD."id";
END IF;
IF NEW."active" AND NOT OLD."active" THEN
INSERT INTO "table2" ( "table1_id" ) SELECT NEW."id";
END IF;
END$$
CREATE TRIGGER "table2_rtrg_AI" AFTER INSERT ON "table2" FOR EACH ROW
BEGIN
INSERT INTO "table3" ( "table1_id" ) SELECT NEW."table1_id";
END$$
CREATE TRIGGER "table2_rtrg_BD" BEFORE DELETE ON "table2" FOR EACH ROW
BEGIN
DELETE FROM "table3" WHERE "table1_id" = OLD."table1_id";
END$$
DELIMITER ;
Q: Why do you quote identifiers using double quotes? (instead of backticks)
Because I don't like "niche syntax"
mysql> show variables LIKE 'sql_mode';
+---------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| Variable_name | Value |
+---------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| sql_mode | PIPES_AS_CONCAT,**ANSI_QUOTES**,IGNORE_SPACE,NO_UNSIGNED_SUBTRACTION,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION |
+---------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
Testcase 1: Expected behaviour (database version 5.2.20)
mysql> SELECT VERSION();
+-----------+
| VERSION() |
+-----------+
| 5.5.20 |
+-----------+
1 row in set (0.00 sec)
mysql> SET GLOBAL general_log := ON;
testing insert trigger
mysql> INSERT INTO "table1" ( "active", "sampleData" ) SELECT 0, 'sample data row 1';
Query OK, 1 row affected (0.00 sec)
Records: 1 Duplicates: 0 Warnings: 0
general_log:
130423 12:51:27 78010 Query INSERT INTO "table1" ( "active", "sampleData" ) SELECT 0, 'sample data row 1'
mysql> INSERT INTO "table1" ( "active", "sampleData" ) SELECT 1, 'sample data row 2';
Query OK, 1 row affected (0.00 sec)
Records: 1 Duplicates: 0 Warnings: 0
general_log:
130423 12:51:33 78010 Query INSERT INTO "table1" ( "active", "sampleData" ) SELECT 1, 'sample data row 2'
78010 Query INSERT INTO "table2" ( "table1_id" ) SELECT NEW."id"
78010 Query INSERT INTO "table3" ( "table1_id" ) SELECT NEW."table1_id"
expected table contents:
mysql> SELECT * FROM "table1";
+----+--------+-------------------+
| id | active | sampleData |
+----+--------+-------------------+
| 1 | 0 | sample data row 1 |
| 2 | 1 | sample data row 2 |
+----+--------+-------------------+
2 rows in set (0.00 sec)
mysql> SELECT * FROM "table2";
+----+-----------+
| id | table1_id |
+----+-----------+
| 1 | 2 |
+----+-----------+
1 row in set (0.00 sec)
mysql> SELECT * FROM "table3";
+----+-----------+
| id | table1_id |
+----+-----------+
| 1 | 2 |
+----+-----------+
1 row in set (0.00 sec)
testing update trigger, set active
mysql> UPDATE "table1" SET "active" = 1 WHERE "id" = 1;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
query_log:
130423 12:52:15 78010 Query UPDATE "table1" SET "active" = 1 WHERE "id" = 1
78010 Query INSERT INTO "table2" ( "table1_id" ) SELECT NEW."id"
78010 Query INSERT INTO "table3" ( "table1_id" ) SELECT NEW."table1_id"
expected table contents:
mysql> SELECT * FROM "table1";
+----+--------+-------------------+
| id | active | sampleData |
+----+--------+-------------------+
| 1 | 1 | sample data row 1 |
| 2 | 1 | sample data row 2 |
+----+--------+-------------------+
2 rows in set (0.00 sec)
mysql> SELECT * FROM "table2";
+----+-----------+
| id | table1_id |
+----+-----------+
| 2 | 1 |
| 1 | 2 |
+----+-----------+
2 rows in set (0.00 sec)
mysql> SELECT * FROM "table3";
+----+-----------+
| id | table1_id |
+----+-----------+
| 2 | 1 |
| 1 | 2 |
+----+-----------+
2 rows in set (0.00 sec)
testing update trigger, set inactive
mysql> UPDATE "table1" SET "active" = 0 WHERE "id" = 2;
Query OK, 1 row affected (0.01 sec)
Rows matched: 1 Changed: 1 Warnings: 0
query_log:
130423 12:52:49 78010 Query UPDATE "table1" SET "active" = 0 WHERE "id" = 2
78010 Query DELETE FROM "table2" WHERE "table1_id" = NEW."id"
78010 Query DELETE FROM "table3" WHERE "table1_id" = OLD."table1_id"
expected table contents:
mysql> SELECT * FROM "table1";
+----+--------+-------------------+
| id | active | sampleData |
+----+--------+-------------------+
| 1 | 1 | sample data row 1 |
| 2 | 0 | sample data row 2 |
+----+--------+-------------------+
2 rows in set (0.00 sec)
mysql> SELECT * FROM "table2";
+----+-----------+
| id | table1_id |
+----+-----------+
| 2 | 1 |
+----+-----------+
1 row in set (0.00 sec)
mysql> SELECT * FROM "table3";
+----+-----------+
| id | table1_id |
+----+-----------+
| 2 | 1 |
+----+-----------+
1 row in set (0.00 sec)
Testcase2: unexpected behaviour (MySQL Version 5.5.30)
Holy triggers grml - You know what? Shame that I didn't test the second case first - unfortunately I was not able to reproduce the error.. the test worked on 5.5.30 as well, will keep you updated :)
EDIT
Trigger did not cascade because of an unknown definer which was remaining in the sql dump made for production. Removing DEFINER= in the trigger dumps (alternative solution would be to create the user or to change DEFINER= to an existing one) solved the problem, solved a part of he problem.
The unknown definer did not cause any log file output