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MDEV-7286 TRIGGER: CREATE OR REPLACE, CREATE IF NOT EXISTS

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Based on the patch by Sriram Patil, made under terms of GSoC 2014.
This commit is contained in:
Alexander Barkov
2015-03-04 09:52:01 +04:00
parent a7ed8523e3
commit 87b0cc9912
14 changed files with 356 additions and 93 deletions
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37
mysql-test/r/create_drop_trigger.result Normal file
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CREATE DATABASE db1;
USE db1;
CREATE TABLE t1 (val INT);
CREATE TRIGGER IF NOT EXISTS val_sum BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + NEW.val;
SET @sum=0;
INSERT INTO t1 VALUES (10), (20), (30);
SELECT @sum;
@sum
60
CREATE TRIGGER IF NOT EXISTS val_sum_new BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + NEW.val;
ERROR 42000: This version of MariaDB doesn't yet support 'multiple triggers with the same action time and event for one table'
CREATE TRIGGER IF NOT EXISTS val_sum AFTER INSERT ON t1 FOR EACH ROW SET @sum = @sum + 1 + NEW.val;
Warnings:
Note 1359 Trigger already exists
CREATE OR REPLACE TRIGGER IF NOT EXISTS val_sum BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + 2 + NEW.val;
ERROR HY000: Incorrect usage of OR REPLACE and IF NOT EXISTS
SELECT ACTION_STATEMENT FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum';
ACTION_STATEMENT
SET @sum = @sum + NEW.val
CREATE OR REPLACE TRIGGER val_sum BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + 3 + NEW.val;
SELECT ACTION_STATEMENT FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum';
ACTION_STATEMENT
SET @sum = @sum + 3 + NEW.val
CREATE TRIGGER val_sum BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + 4 + NEW.val;
ERROR HY000: Trigger already exists
SELECT ACTION_STATEMENT FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum';
ACTION_STATEMENT
SET @sum = @sum + 3 + NEW.val
# Clearing up
DROP TRIGGER IF EXISTS val_sum;
SELECT ACTION_STATEMENT FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum';
ACTION_STATEMENT
DROP TRIGGER IF EXISTS val_sum;
Warnings:
Note 1360 Trigger does not exist
DROP TABLE t1;
DROP DATABASE db1;