drop table if exists t1;
create table t1 (a varchar(16), b int) engine=innodb;
create trigger t1_bi before insert on t1 for each row
begin
set new.a := upper(new.a);
set new.b := new.b + 3;
end|
select trigger_schema, trigger_name, event_object_schema,
event_object_table, action_statement from information_schema.triggers
where event_object_schema = 'test' and event_object_table = 't1';
TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_STATEMENT
test	t1_bi	test	t1	begin
set new.a := upper(new.a);
set new.b := new.b + 3;
end
insert into t1 values ('The Lion', 10);
select * from t1;
a	b
THE LION	13
optimize table t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	note	Table does not support optimize, doing recreate + analyze instead
test.t1	optimize	status	OK
select trigger_schema, trigger_name, event_object_schema,
event_object_table, action_statement from information_schema.triggers
where event_object_schema = 'test' and event_object_table = 't1';
TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_STATEMENT
test	t1_bi	test	t1	begin
set new.a := upper(new.a);
set new.b := new.b + 3;
end
insert into t1 values ('The Unicorn', 20);
select * from t1;
a	b
THE LION	13
THE UNICORN	23
alter table t1 add column c int default 0;
select trigger_schema, trigger_name, event_object_schema,
event_object_table, action_statement from information_schema.triggers
where event_object_schema = 'test' and event_object_table = 't1';
TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_STATEMENT
test	t1_bi	test	t1	begin
set new.a := upper(new.a);
set new.b := new.b + 3;
end
insert into t1 values ('Alice', 30, 1);
select * from t1;
a	b	c
THE LION	13	0
THE UNICORN	23	0
ALICE	33	1
alter table t1 rename to t1;
select trigger_schema, trigger_name, event_object_schema,
event_object_table, action_statement from information_schema.triggers
where event_object_schema = 'test' and event_object_table = 't1';
TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_STATEMENT
test	t1_bi	test	t1	begin
set new.a := upper(new.a);
set new.b := new.b + 3;
end
insert into t1 values ('The Crown', 40, 1);
select * from t1;
a	b	c
THE LION	13	0
THE UNICORN	23	0
ALICE	33	1
THE CROWN	43	1
alter table t1 rename to t1, add column d int default 0;
select trigger_schema, trigger_name, event_object_schema,
event_object_table, action_statement from information_schema.triggers
where event_object_schema = 'test' and event_object_table = 't1';
TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_STATEMENT
test	t1_bi	test	t1	begin
set new.a := upper(new.a);
set new.b := new.b + 3;
end
insert into t1 values ('The Pie', 50, 1, 1);
select * from t1;
a	b	c	d
THE LION	13	0	0
THE UNICORN	23	0	0
ALICE	33	1	0
THE CROWN	43	1	0
THE PIE	53	1	1
alter table t1 add primary key(b), algorithm=copy;
select trigger_schema, trigger_name, event_object_schema,
event_object_table, action_statement from information_schema.triggers
where event_object_schema = 'test' and event_object_table = 't1';
TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_STATEMENT
test	t1_bi	test	t1	begin
set new.a := upper(new.a);
set new.b := new.b + 3;
end
insert into t1 values ('The Mirror', 60, 1, 1);
select * from t1;
a	b	c	d
THE LION	13	0	0
THE UNICORN	23	0	0
ALICE	33	1	0
THE CROWN	43	1	0
THE PIE	53	1	1
THE MIRROR	63	1	1
drop table t1;
DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
CREATE TABLE t1(a INT PRIMARY KEY) ENGINE=innodb;
CREATE TABLE t2(b INT, FOREIGN KEY(b) REFERENCES t1(a)) ENGINE=innodb;
INSERT INTO t1 VALUES (1);
CREATE TRIGGER t1_bd BEFORE DELETE ON t1 FOR EACH ROW SET @a = 1;
CREATE TRIGGER t1_ad AFTER DELETE ON t1 FOR EACH ROW SET @b = 1;
SET @a = 0;
SET @b = 0;
TRUNCATE t1;
ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1`)
SELECT @a, @b;
@a	@b
0	0
DELETE FROM t1;
SELECT @a, @b;
@a	@b
1	1
INSERT INTO t1 VALUES (1);
DELETE FROM t1;
SELECT @a, @b;
@a	@b
1	1
DROP TABLE t2, t1;
End of 5.0 tests
BUG#31612
Trigger fired multiple times leads to gaps in auto_increment sequence
create table t1 (a int, val char(1)) engine=InnoDB;
create table t2 (b int auto_increment primary key,
val char(1)) engine=InnoDB;
create trigger t1_after_insert after
insert on t1 for each row insert into t2 set val=NEW.val;
insert into t1 values ( 123, 'a'), ( 123, 'b'), ( 123, 'c'),
(123, 'd'), (123, 'e'), (123, 'f'), (123, 'g');
insert into t1 values ( 654, 'a'), ( 654, 'b'), ( 654, 'c'),
(654, 'd'), (654, 'e'), (654, 'f'), (654, 'g');
select * from t2 order by b;
b	val
1	a
2	b
3	c
4	d
5	e
6	f
7	g
8	a
9	b
10	c
11	d
12	e
13	f
14	g
drop trigger t1_after_insert;
drop table t1,t2;
Bug#19683834 SOME INNODB ERRORS CAUSES STORED FUNCTION AND TRIGGER HANDLERS TO BE IGNORED
Code fixed in Bug#16041903
CREATE TABLE t1 (id int unsigned PRIMARY KEY, val int DEFAULT 0)
ENGINE=InnoDB;
INSERT INTO t1 (id) VALUES (1), (2);
CREATE TABLE t2 (id int PRIMARY KEY);
CREATE TABLE t3 LIKE t2;
CREATE TRIGGER bef_insert BEFORE INSERT ON t2 FOR EACH ROW
BEGIN
DECLARE CONTINUE HANDLER FOR 1062 BEGIN END;
INSERT INTO t3 (id) VALUES (NEW.id);
INSERT INTO t3 (id) VALUES (NEW.id);
END//
START TRANSACTION;
UPDATE t1 SET val = val + 1;
connect  con2,localhost,root,,test,,;
SET SESSION innodb_lock_wait_timeout = 2;
UPDATE t1 SET val = val + 1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
INSERT INTO t2 (id) VALUES (1);
disconnect con2;
connection default;
DROP TABLE t3, t2, t1;