path: root/mysql-test/suite/gcol/r/gcol_ins_upd_myisam.result

SET @@session.default_storage_engine = 'MyISAM';
create table t1 (a int,
b int generated always as (-a) virtual,
c int generated always as (-a) stored);
set sql_warnings = 1;
#
# *** INSERT ***
#
# INSERT INTO tbl_name VALUES... DEFAULT is specified against gcols
insert into t1 values (1,default,default);
select * from t1;
a	b	c
1	-1	-1
delete from t1;
select * from t1;
a	b	c
# INSERT INTO tbl_name VALUES... NULL is specified against gcols
insert into t1 values (1,null,null);
select * from t1;
a	b	c
1	-1	-1
delete from t1;
select * from t1;
a	b	c
# INSERT INTO tbl_name VALUES... a non-NULL value is specified against gcols
insert ignore into t1 values (1,2,3);
Warnings:
Warning	1906	The value specified for generated column 'b' in table 't1' has been ignored
Warning	1906	The value specified for generated column 'c' in table 't1' has been ignored
select * from t1;
a	b	c
1	-1	-1
delete from t1;
select * from t1;
a	b	c
# INSERT INTO tbl_name (<non_gcol_list>) VALUES...
insert into t1 (a) values (1), (2);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
delete from t1;
select * from t1;
a	b	c
# INSERT INTO tbl_name (<normal+gcols>) VALUES... DEFAULT is specified
# against gcols
insert into t1 (a,b) values (1,default), (2,default);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
delete from t1;
select * from t1;
a	b	c
# INSERT INTO tbl_name (<normal+gcols>) VALUES... NULL is specified against gcols
insert into t1 (a,b) values (1,null), (2,null);
select * from t1;
a	b	c
1	-1	-1
2	-2	-2
delete from t1;
select * from t1;
a	b	c
# INSERT INTO tbl_name (<normal+gcols>) VALUES... a non-NULL value is specified
# against gcols
insert ignore into t1 (a,b) values (1,3), (2,4);
Warnings:
Warning	1906	The value specified for generated column 'b' in table 't1' has been ignored
Warning	1906	The value specified for generated column 'b' in table 't1' has been ignored
select * from t1;
a	b	c
1	-1	-1
2	-2	-2
delete from t1;
select * from t1;
a	b	c
drop table t1;
# Table with UNIQUE non-gcol field. INSERT INTO tbl_name VALUES... ON DUPLICATE
# KEY UPDATE <non_gcol>=expr, <gcol>=expr
create table t1 (a int unique,
b int generated always as (-a) virtual,
c int generated always as (-a) stored);
insert into t1 values (1,default,default);
insert into t1 values (1,default,default)
on duplicate key update a=2, b=default;
select a,b,c from t1;
a	b	c
2	-2	-2
delete from t1 where b in (1,2);
select * from t1;
a	b	c
2	-2	-2
drop table t1;
# Table with UNIQUE gcol field. INSERT INTO tbl_name VALUES... ON DUPLICATE
# KEY UPDATE <non_gcol>=expr, <gcol>=expr
create table t1 (a int,
b int generated always as (-a) virtual,
c int generated always as (-a) stored unique);
insert into t1 values (1,default,default);
insert into t1 values (1,default,default)
on duplicate key update a=2, b=default;
select a,b,c from t1;
a	b	c
2	-2	-2
# CREATE new_table ... LIKE old_table
# INSERT INTO new_table SELECT * from old_table
create table t2 like t1;
insert into t2(a) select a from t1;
select * from t2;
a	b	c
2	-2	-2
drop table t2;
# CREATE new_table ... LIKE old_table INSERT INTO new_table (<non-gcols>, <gcols>)
# SELECT <non-gcols>, <gcols> from old_table
insert into t1 values (1,default,default);
select * from t1;
a	b	c
2	-2	-2
1	-1	-1
create table t2 like t1;
insert into t2 (a) select a from t1;
select * from t2 order by a;
a	b	c
1	-1	-1
2	-2	-2
drop table t2;
drop table t1;
#
# *** UPDATE ***
#
# UPDATE tbl_name SET non-gcol=expr WHERE non-gcol=expr
create table t1 (a int,
b int generated always as (-a) virtual,
c int generated always as (-a) stored);
insert into t1 (a) values (1), (2);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
update t1 set a=3 where a=2;
select * from t1 order by a;
a	b	c
1	-1	-1
3	-3	-3
delete from t1;
select * from t1;
a	b	c
# UPDATE tbl_name SET gcol=expr WHERE non-gcol=expr
insert into t1 (a) values (1), (2);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
update ignore t1 set c=3 where a=2;
Warnings:
Warning	1906	The value specified for generated column 'c' in table 't1' has been ignored
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
delete from t1;
select * from t1;
a	b	c
# UPDATE tbl_name SET non-gcol=expr WHERE gcol=expr
insert into t1 (a) values (1), (2);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
update t1 set a=3 where b=-2;
select * from t1 order by a;
a	b	c
1	-1	-1
3	-3	-3
delete from t1;
select * from t1;
a	b	c
# UPDATE tbl_name SET gcol=expr WHERE gcol=expr
insert into t1 (a) values (1), (2);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
update ignore t1 set c=3 where b=-2;
Warnings:
Warning	1906	The value specified for generated column 'c' in table 't1' has been ignored
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
delete from t1;
select * from t1;
a	b	c
drop table t1;
# INDEX created on gcol
# UPDATE tbl_name SET non-gcol=expr WHERE gcol=const
create table t1 (a int,
b int generated always as (-a) virtual,
c int generated always as (-a) stored unique);
insert into t1 (a) values (1), (2);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
update t1 set a=3 where c=-2;
select * from t1;
a	b	c
1	-1	-1
3	-3	-3
delete from t1;
select * from t1;
a	b	c
# INDEX created on gcol
# UPDATE tbl_name SET non-gcol=expr WHERE gcol=between const1 and const2
insert into t1 (a) values (1), (2);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
update t1 set a=3 where c between -3 and -2;
select * from t1 order by a;
a	b	c
1	-1	-1
3	-3	-3
delete from t1;
select * from t1;
a	b	c
# No INDEX created on gcol
# UPDATE tbl_name SET non-gcol=expr WHERE gcol=between const1 and const2
insert into t1 (a) values (1), (2);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
update t1 set a=3 where b between -3 and -2;
select * from t1 order by a;
a	b	c
1	-1	-1
3	-3	-3
delete from t1;
select * from t1;
a	b	c
# INDEX created on gcol
# UPDATE tbl_name SET non-gcol=expr
# WHERE gcol=between const1 and const2 ORDER BY gcol
insert into t1 (a) values (1), (2), (3), (4), (5);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
3	-3	-3
4	-4	-4
5	-5	-5
update t1 set a=6 where c between -1 and 0
order by c;
select * from t1 order by a;
a	b	c
2	-2	-2
3	-3	-3
4	-4	-4
5	-5	-5
6	-6	-6
delete from t1 where c between -6 and 0;
select * from t1;
a	b	c
# INDEX created on gcol
# UPDATE tbl_name SET non-gcol=expr
# WHERE gcol=between const1 and const2 ORDER BY gcol LIMIT 2
insert into t1 (a) values (1), (2), (3), (4), (5);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
3	-3	-3
4	-4	-4
5	-5	-5
update t1 set a=6 where c between -1 and 0
order by c limit 2;
select * from t1 order by a;
a	b	c
2	-2	-2
3	-3	-3
4	-4	-4
5	-5	-5
6	-6	-6
delete from t1 where c between -2 and 0 order by c;
select * from t1 order by a;
a	b	c
3	-3	-3
4	-4	-4
5	-5	-5
6	-6	-6
delete from t1;
# INDEX created on gcol
# UPDATE tbl_name SET non-gcol=expr
# WHERE indexed gcol=between const1 and const2 and non-indexed gcol=const3
insert into t1 (a) values (1), (2), (3), (4), (5);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
3	-3	-3
4	-4	-4
5	-5	-5
update t1 set a=6 where (c between -2 and 0) and (b=-1);
select * from t1 order by a;
a	b	c
2	-2	-2
3	-3	-3
4	-4	-4
5	-5	-5
6	-6	-6
delete from t1;
# INDEX created on gcol
# UPDATE tbl_name SET non-gcol=expr
# WHERE indexed gcol=between const1 and const2 and non-indexed gcol=const3
# ORDER BY indexed gcol
insert into t1 (a) values (1), (2), (3), (4), (5);
select * from t1 order by a;
a	b	c
1	-1	-1
2	-2	-2
3	-3	-3
4	-4	-4
5	-5	-5
update t1 set a=6 where (c between -2 and 0) and (b=-1) order by c;
select * from t1 order by a;
a	b	c
2	-2	-2
3	-3	-3
4	-4	-4
5	-5	-5
6	-6	-6
delete from t1;
drop table t1;
#
# *** REPLACE ***
#
# UNIQUE INDEX on gcol
# REPLACE tbl_name (non-gcols) VALUES (non-gcols);
create table t1 (a int,
b int generated always as (-a) virtual,
c int generated always as (-a) stored unique,
d varchar(16));
insert into t1 (a,d) values (1,'a'), (2,'b');
select * from t1 order by a;
a	b	c	d
1	-1	-1	a
2	-2	-2	b
replace t1 (a,d) values (1,'c');
select * from t1 order by a;
a	b	c	d
1	-1	-1	c
2	-2	-2	b
delete from t1;
select * from t1;
a	b	c	d
set sql_warnings = 0;
drop table t1;
Bug#20797344: WL#8149: ALLOCATED SPACE FOR INDEXED BLOB VGC CAN BE
OVERWRITTEN FOR UPDATE
#
CREATE TABLE t (a varchar(100), b blob,
c blob GENERATED ALWAYS AS (concat(a,b)) VIRTUAL,
d blob GENERATED ALWAYS AS (b) VIRTUAL,
e int(11) GENERATED ALWAYS AS (10) VIRTUAL,
h int(11) NOT NULL, PRIMARY KEY (h), key(c(20)));
INSERT INTO t(a,b,h) VALUES('aaaaaaa','1111111', 11);
INSERT INTO t(a,b,h) VALUES('bbbbbbb','2222222', 22);
SELECT c FROM t;
c
aaaaaaa1111111
bbbbbbb2222222
UPDATE t SET a='ccccccc';
SELECT c FROM t;
c
ccccccc1111111
ccccccc2222222
DROP TABLE t;
# Bug#21081742: ASSERTION !TABLE || (!TABLE->WRITE_SET ||
# BITMAP_IS_SET(TABLE->WRITE_SET
#
CREATE TABLE b (
pk INTEGER AUTO_INCREMENT,
col_varchar_nokey VARCHAR(1),
col_varchar_key VARCHAR(2) GENERATED ALWAYS AS
(CONCAT(col_varchar_nokey, col_varchar_nokey)),
PRIMARY KEY (pk)
);
INSERT INTO b (col_varchar_nokey) VALUES ('v'),('v');
CREATE TABLE d (
pk INTEGER AUTO_INCREMENT,
col_varchar_nokey VARCHAR(1),
col_varchar_key VARCHAR(2) GENERATED ALWAYS AS
(CONCAT(col_varchar_nokey, col_varchar_nokey)),
PRIMARY KEY (pk)
) ;
INSERT INTO d (col_varchar_nokey) VALUES ('q'),('g'),('e'),('l'),(NULL),('v'),('c'),('u'),('x');
CREATE TABLE bb (
pk INTEGER AUTO_INCREMENT,
col_varchar_nokey VARCHAR(1) /*! NULL */,
col_varchar_key VARCHAR(2) GENERATED ALWAYS AS
(CONCAT(col_varchar_nokey, col_varchar_nokey)),
PRIMARY KEY (pk)
);
INSERT INTO bb (col_varchar_nokey) VALUES ('j'),('h');
EXPLAIN UPDATE
d AS OUTR1, b AS OUTR2
SET OUTR1.col_varchar_nokey = NULL
WHERE
( 't', 'b' )  IN
(
SELECT
INNR1.col_varchar_nokey AS x,
INNR1.col_varchar_key AS y
FROM bb AS INNR1
WHERE OUTR1.pk = 1
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	OUTR1	const	PRIMARY	PRIMARY	4	const	1	
1	PRIMARY	INNR1	ALL	NULL	NULL	NULL	NULL	2	Using where; FirstMatch(OUTR1)
1	PRIMARY	OUTR2	index	NULL	PRIMARY	4	NULL	2	Using index
DROP TABLE IF EXISTS b,bb,d;
#
# Bug#21216067 ASSERTION FAILED ROW_UPD_SEC_INDEX_ENTRY (INNOBASE/ROW/ROW0UPD.CC:2103)
#
CREATE TABLE t (
x INT, y INT, gc INT GENERATED ALWAYS AS (x+1) STORED
);
INSERT INTO t VALUES ();
UPDATE t t1, t t2 SET t2.y = 1, t1.x = 2;
SELECT * FROM t;
x	y	gc
2	1	3
DROP TABLE t;
CREATE TABLE t (
x INT, y INT, gc INT GENERATED ALWAYS AS (x+1), KEY (x,gc)
);
INSERT INTO t VALUES ();
UPDATE t t1, t t2 SET t1.x = 1, t2.y = 2;
SELECT * FROM t;
x	y	gc
1	2	2
SELECT gc FROM t;
gc
2
CHECK TABLE t;
Table	Op	Msg_type	Msg_text
test.t	check	status	OK
DROP TABLE t;
# stored
CREATE TABLE C (
col_varchar_nokey VARCHAR(1),
col_varchar_key VARCHAR(2) GENERATED ALWAYS AS
(CONCAT(col_varchar_nokey, col_varchar_nokey)) STORED
);
INSERT INTO C (col_varchar_nokey) VALUES ('c');
EXPLAIN UPDATE C AS OUTR1, C AS OUTR2
SET OUTR1.`col_varchar_nokey` = 'f',
OUTR2.`col_varchar_nokey` = "a";
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	OUTR1	system	NULL	NULL	NULL	NULL	1	
1	SIMPLE	OUTR2	system	NULL	NULL	NULL	NULL	1	
UPDATE C AS OUTR1, C AS OUTR2
SET OUTR1.`col_varchar_nokey` = 'f',
OUTR2.`col_varchar_nokey` = "a";
SELECT * from C;
col_varchar_nokey	col_varchar_key
a	aa
DROP TABLE C;
# stored, indexed
CREATE TABLE C (
col_varchar_nokey VARCHAR(1),
col_varchar_key VARCHAR(2) GENERATED ALWAYS AS
(CONCAT(col_varchar_nokey, col_varchar_nokey)) STORED,
KEY (col_varchar_key, col_varchar_nokey)
);
INSERT INTO C (col_varchar_nokey) VALUES ('c');
EXPLAIN UPDATE C AS OUTR1, C AS OUTR2
SET OUTR1.`col_varchar_nokey` = 'f',
OUTR2.`col_varchar_nokey` = "a";
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	OUTR1	system	NULL	NULL	NULL	NULL	1	
1	SIMPLE	OUTR2	system	NULL	NULL	NULL	NULL	1	
UPDATE C AS OUTR1, C AS OUTR2
SET OUTR1.`col_varchar_nokey` = 'f',
OUTR2.`col_varchar_nokey` = "a";
SELECT * from C;
col_varchar_nokey	col_varchar_key
a	aa
DROP TABLE C;
# virtual
CREATE TABLE C (
col_varchar_nokey VARCHAR(1),
col_varchar_key VARCHAR(2) GENERATED ALWAYS AS
(CONCAT(col_varchar_nokey, col_varchar_nokey)) VIRTUAL
);
INSERT INTO C (col_varchar_nokey) VALUES ('c');
EXPLAIN UPDATE C AS OUTR1, C AS OUTR2
SET OUTR1.`col_varchar_nokey` = 'f',
OUTR2.`col_varchar_nokey` = "a";
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	OUTR1	system	NULL	NULL	NULL	NULL	1	
1	SIMPLE	OUTR2	system	NULL	NULL	NULL	NULL	1	
UPDATE C AS OUTR1, C AS OUTR2
SET OUTR1.`col_varchar_nokey` = 'f',
OUTR2.`col_varchar_nokey` = "a";
SELECT * from C;
col_varchar_nokey	col_varchar_key
a	aa
DROP TABLE C;
# virtual, indexed
CREATE TABLE C (
col_varchar_nokey VARCHAR(1),
col_varchar_key VARCHAR(2) GENERATED ALWAYS AS
(CONCAT(col_varchar_nokey, col_varchar_nokey)) VIRTUAL,
KEY (col_varchar_key, col_varchar_nokey)
);
INSERT INTO C (col_varchar_nokey) VALUES ('c');
EXPLAIN UPDATE C AS OUTR1, C AS OUTR2
SET OUTR1.`col_varchar_nokey` = 'f',
OUTR2.`col_varchar_nokey` = "a";
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	OUTR1	system	NULL	NULL	NULL	NULL	1	
1	SIMPLE	OUTR2	system	NULL	NULL	NULL	NULL	1	
UPDATE C AS OUTR1, C AS OUTR2
SET OUTR1.`col_varchar_nokey` = 'f',
OUTR2.`col_varchar_nokey` = "a";
SELECT * from C;
col_varchar_nokey	col_varchar_key
a	aa
DROP TABLE C;
#
# Bug #21530366 CRASH/ASSERTION, CORRUPTION WITH INDEXES +
#               VIRTUAL COLUMNS, BLOB
#
CREATE TABLE t (
a INTEGER,
b BLOB GENERATED ALWAYS AS (a) VIRTUAL,
INDEX (b(57))
);
INSERT INTO t (a) VALUES (9);
UPDATE t SET a = 10;
DELETE FROM t WHERE a = 10;
DROP TABLE t;
# Bug#21807818: Generated columns not updated with empty insert list
CREATE TABLE t (
a BLOB GENERATED ALWAYS AS ('') VIRTUAL,
b TIMESTAMP(4) GENERATED ALWAYS AS ('') VIRTUAL,
KEY (a(183),b)
);
Warnings:
Warning	1901	Function or expression '''' cannot be used in the GENERATED ALWAYS AS clause of `b`
Warning	1105	Expression depends on the @@sql_mode value TIME_ROUND_FRACTIONAL
INSERT IGNORE INTO t VALUES(), (), ();
Warnings:
Warning	1901	Function or expression '''' cannot be used in the GENERATED ALWAYS AS clause of `b`
Warning	1105	Expression depends on the @@sql_mode value TIME_ROUND_FRACTIONAL
Warning	1265	Data truncated for column 'b' at row 1
Warning	1265	Data truncated for column 'b' at row 2
Warning	1265	Data truncated for column 'b' at row 3
DELETE IGNORE FROM t;
DROP TABLE t;
#
# Bug#22195458:GCOLS: ASSERTION 0 AND CORRUPTION...
#
CREATE TABLE t (
a INT,
b YEAR GENERATED ALWAYS AS ('a') VIRTUAL,
c YEAR GENERATED ALWAYS AS ('aaaa') VIRTUAL,
b1 YEAR GENERATED ALWAYS AS ('a') STORED,
c1 YEAR GENERATED ALWAYS AS ('aaaa') STORED,
UNIQUE(b),
UNIQUE(b1)
);
INSERT IGNORE INTO t VALUES();
SELECT b from t;
b
2000
SELECT b1 from t;
b1
0000
SELECT * from t;
a	b	c	b1	c1
NULL	2000	0000	0000	0000
DELETE FROM t;
CHECK TABLE t EXTENDED;
Table	Op	Msg_type	Msg_text
test.t	check	status	OK
DROP TABLE t;
# Bug#22195364:GCOLS: FAILING ASSERTION:
#              DFIELD_IS_NULL(DFIELD2) || DFIELD2->DATA
CREATE TABLE t (
a INT,
c BLOB GENERATED ALWAYS AS ('') VIRTUAL,
UNIQUE KEY(c(1),a)
);
INSERT INTO t(a) VALUES(1) ON DUPLICATE KEY UPDATE a=2;
SELECT * FROM t;
a	c
1	
INSERT INTO t(a) VALUES(1) ON DUPLICATE KEY UPDATE a=2;
SELECT * FROM t;
a	c
2	
SELECT GROUP_CONCAT(c ORDER BY c) FROM t;
GROUP_CONCAT(c ORDER BY c)

DROP TABLE t;
#Bug#21929967:GCOLS:GCOL VALUE CHANGES WHEN SESSION CHANGES SQL_MODE
CREATE TABLE t(c1 INT GENERATED ALWAYS AS (1) VIRTUAL,
c2 INT GENERATED ALWAYS AS(2) STORED);
INSERT INTO t VALUES(DEFAULT, DEFAULT);
SELECT * FROM t;
c1	c2
1	2
CREATE TABLE t1(c1 INT, c2 INT GENERATED ALWAYS AS(c1 + 1) STORED);
INSERT INTO t1(c2) VALUES(DEFAULT);
SELECT * FROM t1;
c1	c2
NULL	NULL
CREATE TABLE t2(c1 INT DEFAULT 1, c2 INT GENERATED ALWAYS AS(c1 + 1) STORED);
INSERT INTO t2(c2) VALUES(DEFAULT);
SELECT * FROM t2;
c1	c2
1	2
DROP TABLE t, t1, t2;
# Bug#22179637: INSERT INTO TABLE FROM SELECT ACCEPTS TO INSERT INTO
#              GENERATED COLUMNS
CREATE TABLE t1 (
i1 INTEGER,
i2 INTEGER GENERATED ALWAYS AS (i1 + i1)
);
INSERT INTO t1 (i1) SELECT 5;
INSERT INTO t1 (i1) SELECT 5 ON DUPLICATE KEY UPDATE i2= DEFAULT;
SELECT * FROM t1;
i1	i2
5	10
5	10
CREATE TABLE t2 (
i1 INTEGER,
i2 INTEGER GENERATED ALWAYS AS (i1 + i1) STORED
);
INSERT INTO t2 (i1) SELECT 5;
INSERT INTO t2 (i1) SELECT 5 ON DUPLICATE KEY UPDATE i2= DEFAULT;
SELECT * FROM t2;
i1	i2
5	10
5	10
DROP TABLE t1,t2;
#
# Bug#22070021 GCOL:ASSERTION `!TABLE || (!TABLE->WRITE_SET ||
#              BITMAP_IS_SET(TABLE->WRITE_SET,
#
CREATE TABLE t1(
c1 INT,
c2 INT GENERATED ALWAYS AS (c1 + c1) VIRTUAL,
KEY(c2)
);
INSERT INTO t1(c1) VALUES(0);
DELETE O1.* FROM t1 AS O1, t1 AS O2;
SELECT * FROM t1;
c1	c2
DROP TABLE t1;
#
# Bug#21944199 SIMPLE DELETE QUERY CAUSES INNODB: FAILING ASSERTION: 0
#              & DATA CORRUPTION
#
CREATE TEMPORARY TABLE t1 (
a INTEGER NOT NULL,
b INTEGER GENERATED ALWAYS AS (a+1) VIRTUAL
);
INSERT INTO t1 (a) VALUES (0), (0), (0);
ALTER TABLE t1 ADD INDEX idx (b);
DELETE FROM t1;
DROP TEMPORARY TABLE t1;
DROP VIEW  IF EXISTS v1,v2;
DROP TABLE IF EXISTS t1,t2,t3;
DROP PROCEDURE IF EXISTS p1;
DROP FUNCTION IF EXISTS f1;
DROP TRIGGER IF EXISTS trg1;
DROP TRIGGER IF EXISTS trg2;
set sql_warnings = 0;