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--source include/master-slave.inc --echo # Part 1 - initial creation connection master; CREATE DATABASE db1; USE db1; CREATE TABLE t1 (val INT); CREATE TRIGGER val_sum BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + NEW.val + 1; SET @sum=0; INSERT INTO t1 VALUES (10), (20), (30); SELECT ACTION_STATEMENT AS ACTION_STATEMENT_Master FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum'; sync_slave_with_master; SELECT ACTION_STATEMENT AS ACTION_STATEMENT_Slave FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum'; --echo # Part 2 - CREATE IF NOT EXISTS (on a existing trigger) connection master; CREATE TRIGGER IF NOT EXISTS val_sum AFTER INSERT ON t1 FOR EACH ROW SET @sum = @sum + NEW.val + 2; SELECT ACTION_STATEMENT AS ACTION_STATEMENT_Master FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum'; sync_slave_with_master; SELECT ACTION_STATEMENT AS ACTION_STATEMENT_Slave FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum'; --echo # Part 3 - CREATE OR REPLACE (on a existing trigger) connection master; CREATE OR REPLACE TRIGGER val_sum BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + NEW.val + 3; SELECT ACTION_STATEMENT AS ACTION_STATEMENT_Master FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum'; sync_slave_with_master; SELECT ACTION_STATEMENT AS ACTION_STATEMENT_Slave FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum'; --echo # Clearing up connection master; DROP TRIGGER val_sum; DROP TABLE t1; DROP TRIGGER IF EXISTS val_sum; --error ER_TRG_DOES_NOT_EXIST DROP TRIGGER random_trigger; DROP DATABASE db1; --error ER_NO_DB_ERROR DROP TRIGGER IF EXISTS val_sum; --echo # Syncing slave with master sync_slave_with_master; --error ER_TRG_DOES_NOT_EXIST DROP TRIGGER val_sum; --source include/rpl_end.inc