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|
set sql_mode=strict_all_tables;
set time_zone="+02:00";
create table t1 (a int not null, b int, c int);
create trigger trgi before insert on t1 for each row set new.a=if(new.a is null,new.b,new.c);
insert t1 values (10, NULL, 1);
insert t1 values (NULL, 2, NULL);
insert t1 values (NULL, NULL, 20);
ERROR 23000: Column 'a' cannot be null
insert t1 values (1, 2, NULL);
ERROR 23000: Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
insert ignore t1 values (NULL, NULL, 30);
Warnings:
Warning 1048 Column 'a' cannot be null
insert ignore t1 values (1, 3, NULL);
Warnings:
Warning 1048 Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
0 NULL 30
0 3 NULL
insert t1 set a=NULL, b=4, c=a;
select * from t1;
a b c
1 NULL 1
2 2 NULL
0 NULL 30
0 3 NULL
4 4 NULL
delete from t1;
insert t1 (a,c) values (10, 1);
insert t1 (a,b) values (NULL, 2);
insert t1 (a,c) values (NULL, 20);
ERROR 23000: Column 'a' cannot be null
insert t1 (a,b) values (1, 2);
ERROR 23000: Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
delete from t1;
insert t1 select 10, NULL, 1;
insert t1 select NULL, 2, NULL;
insert t1 select NULL, NULL, 20;
ERROR 23000: Column 'a' cannot be null
insert t1 select 1, 2, NULL;
ERROR 23000: Column 'a' cannot be null
insert ignore t1 select NULL, NULL, 30;
Warnings:
Warning 1048 Column 'a' cannot be null
insert ignore t1 select 1, 3, NULL;
Warnings:
Warning 1048 Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
0 NULL 30
0 3 NULL
delete from t1;
insert delayed t1 values (10, NULL, 1);
insert delayed t1 values (NULL, 2, NULL);
insert delayed t1 values (NULL, NULL, 20);
ERROR 23000: Column 'a' cannot be null
insert delayed t1 values (1, 2, NULL);
ERROR 23000: Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
insert delayed ignore t1 values (NULL, NULL, 30);
Warnings:
Warning 1048 Column 'a' cannot be null
insert delayed ignore t1 values (1, 3, NULL);
Warnings:
Warning 1048 Column 'a' cannot be null
flush table t1;
select * from t1;
a b c
1 NULL 1
2 2 NULL
0 NULL 30
0 3 NULL
delete from t1;
alter table t1 add primary key (a);
create trigger trgu before update on t1 for each row set new.a=if(new.a is null,new.b,new.c);
insert t1 values (100,100,100), (200,200,200), (300,300,300);
insert t1 values (100,100,100) on duplicate key update a=10, b=NULL, c=1;
insert t1 values (200,200,200) on duplicate key update a=NULL, b=2, c=NULL;
insert t1 values (300,300,300) on duplicate key update a=NULL, b=NULL, c=20;
ERROR 23000: Column 'a' cannot be null
insert t1 values (300,300,300) on duplicate key update a=1, b=2, c=NULL;
ERROR 23000: Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
300 300 300
delete from t1;
insert t1 values (1,100,1), (2,200,2);
replace t1 values (10, NULL, 1);
replace t1 values (NULL, 2, NULL);
replace t1 values (NULL, NULL, 30);
ERROR 23000: Column 'a' cannot be null
replace t1 values (1, 3, NULL);
ERROR 23000: Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
delete from t1;
insert t1 values (100,100,100), (200,200,200), (300,300,300);
update t1 set a=10, b=NULL, c=1 where a=100;
update t1 set a=NULL, b=2, c=NULL where a=200;
update t1 set a=NULL, b=NULL, c=20 where a=300;
ERROR 23000: Column 'a' cannot be null
update t1 set a=1, b=2, c=NULL where a=300;
ERROR 23000: Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
300 300 300
set statement sql_mode='' for update t1 set a=1, b=2, c=NULL where a > 1;
ERROR 23000: Duplicate entry '0' for key 'PRIMARY'
select * from t1;
a b c
1 NULL 1
0 2 NULL
300 300 300
update t1 set a=NULL, b=4, c=a where a=300;
select * from t1;
a b c
1 NULL 1
0 2 NULL
4 4 NULL
delete from t1;
create table t2 (d int, e int);
insert t1 values (100,100,100), (200,200,200), (300,300,300);
insert t2 select a,b from t1;
update t1,t2 set a=10, b=NULL, c=1 where b=d and e=100;
update t1,t2 set a=NULL, b=2, c=NULL where b=d and e=200;
update t1,t2 set a=NULL, b=NULL, c=20 where b=d and e=300;
ERROR 23000: Column 'a' cannot be null
update t1,t2 set a=1, b=2, c=NULL where b=d and e=300;
ERROR 23000: Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
300 300 300
update t1,t2 set a=NULL, b=4, c=a where b=d and e=300;
select * from t1;
a b c
1 NULL 1
2 2 NULL
4 4 300
delete from t1;
insert t2 values (2,2);
create view v1 as select * from t1, t2 where d=2;
insert v1 (a,c) values (10, 1);
insert v1 (a,b) values (NULL, 2);
insert v1 (a,c) values (NULL, 20);
ERROR 23000: Column 'a' cannot be null
insert v1 (a,b) values (1, 2);
ERROR 23000: Column 'a' cannot be null
select * from v1;
a b c d e
1 NULL 1 2 2
2 2 NULL 2 2
delete from t1;
drop view v1;
drop table t2;
load data infile 'mdev8605.txt' into table t1 fields terminated by ',';
ERROR 23000: Column 'a' cannot be null
select * from t1;
a b c
1 NULL 1
2 2 NULL
drop table t1;
create table t1 (a timestamp, b int auto_increment primary key);
create trigger trgi before insert on t1 for each row set new.a=if(new.a is null, '2000-10-20 10:20:30', NULL);
set statement timestamp=777777777 for insert t1 (a) values (NULL);
set statement timestamp=888888888 for insert t1 (a) values ('1999-12-11 10:9:8');
select b, a, unix_timestamp(a) from t1;
b a unix_timestamp(a)
1 2000-10-20 10:20:30 972030030
2 1998-03-03 03:34:48 888888888
set statement timestamp=999999999 for update t1 set b=3 where b=2;
select b, a, unix_timestamp(a) from t1;
b a unix_timestamp(a)
1 2000-10-20 10:20:30 972030030
3 2001-09-09 03:46:39 999999999
create trigger trgu before update on t1 for each row set new.a='2011-11-11 11:11:11';
update t1 set b=4 where b=3;
select b, a, unix_timestamp(a) from t1;
b a unix_timestamp(a)
1 2000-10-20 10:20:30 972030030
4 2011-11-11 11:11:11 1321002671
drop table t1;
create table t1 (a int auto_increment primary key);
create trigger trgi before insert on t1 for each row set new.a=if(new.a is null, 5, NULL);
insert t1 values (NULL);
insert t1 values (10);
select a from t1;
a
5
6
drop table t1;
create table t1 (a int, b int, c int);
create trigger trgi before insert on t1 for each row set new.a=if(new.a is null,new.b,new.c);
insert t1 values (10, NULL, 1);
insert t1 values (NULL, 2, NULL);
insert t1 values (NULL, NULL, 20);
insert t1 values (1, 2, NULL);
select * from t1;
a b c
1 NULL 1
2 2 NULL
NULL NULL 20
NULL 2 NULL
drop table t1;
create table t1 (a1 tinyint not null, a2 timestamp not null,
a3 tinyint not null auto_increment primary key,
b tinyint, c int not null);
create trigger trgi before insert on t1 for each row
begin
if new.b=1 then set new.a1=if(new.c,new.c,null); end if;
if new.b=2 then set new.a2=if(new.c,new.c,null); end if;
if new.b=3 then set new.a3=if(new.c,new.c,null); end if;
end|
set statement timestamp=777777777 for
load data infile 'sep8605.txt' into table t1 fields terminated by ',';
ERROR 23000: Column 'a1' cannot be null
select * from t1;
a1 a2 a3 b c
1 2010-11-12 01:02:03 10 0 0
2 2010-11-12 01:02:03 11 1 2
3 1994-08-25 03:22:57 12 0 0
4 2000-09-08 07:06:05 13 2 908070605
5 1994-08-25 03:22:57 14 2 0
6 2010-11-12 01:02:03 15 0 0
7 2010-11-12 01:02:03 20 3 20
8 2010-11-12 01:02:03 21 3 0
delete from t1;
set statement timestamp=777777777 for
load data infile 'sep8605.txt' into table t1 fields terminated by ','
(@a,a2,a3,b,c) set a1=100-@a;
ERROR 23000: Column 'a1' cannot be null
select 100-a1,a2,a3,b,c from t1;
100-a1 a2 a3 b c
1 2010-11-12 01:02:03 10 0 0
98 2010-11-12 01:02:03 11 1 2
3 1994-08-25 03:22:57 12 0 0
4 2000-09-08 07:06:05 13 2 908070605
5 1994-08-25 03:22:57 14 2 0
6 2010-11-12 01:02:03 22 0 0
7 2010-11-12 01:02:03 20 3 20
8 2010-11-12 01:02:03 23 3 0
delete from t1;
set statement timestamp=777777777 for
load data infile 'fix8605.txt' into table t1 fields terminated by '';
ERROR 23000: Column 'a1' cannot be null
select * from t1;
a1 a2 a3 b c
1 2010-11-12 01:02:03 10 0 0
5 1994-08-25 03:22:57 14 2 0
8 2010-11-12 01:02:03 24 3 0
delete from t1;
set statement timestamp=777777777 for
load xml infile 'xml8605.txt' into table t1 rows identified by '<row>';
ERROR 23000: Column 'a1' cannot be null
select * from t1;
a1 a2 a3 b c
1 2010-11-12 01:02:03 10 0 0
2 2010-11-12 01:02:03 11 1 2
3 1994-08-25 03:22:57 12 0 0
4 2000-09-08 07:06:05 13 2 908070605
5 1994-08-25 03:22:57 14 2 0
6 2010-11-12 01:02:03 25 0 0
7 2010-11-12 01:02:03 20 3 20
8 2010-11-12 01:02:03 26 3 0
drop table t1;
create table t1 (a int not null default 5, b int, c int);
create trigger trgi before insert on t1 for each row set new.b=new.c;
insert t1 values (DEFAULT,2,1);
select * from t1;
a b c
5 1 1
drop table t1;
create table t1 (a int not null, b int not null default 5, c int);
create trigger trgi before insert on t1 for each row
begin
if new.c=1 then set new.a=1, new.b=1; end if;
if new.c=2 then set new.a=NULL, new.b=NULL; end if;
if new.c=3 then set new.a=2; end if;
end|
insert t1 values (9, 9, 1);
insert t1 values (9, 9, 2);
ERROR 23000: Column 'a' cannot be null
insert t1 (a,c) values (9, 3);
select * from t1;
a b c
1 1 1
2 5 3
drop table t1;
set session sql_mode ='no_auto_value_on_zero';
create table t1 (id int unsigned auto_increment primary key);
insert t1 values (0);
select * from t1;
id
0
delete from t1;
create trigger t1_bi before insert on t1 for each row begin end;
insert t1 values (0);
select * from t1;
id
0
drop table t1;
create table t1 (a int not null, b int);
create trigger trgi before update on t1 for each row do 1;
insert t1 values (1,1),(2,2),(3,3),(1,4);
create table t2 select a as c, b as d from t1;
update t1 set a=(select count(c) from t2 where c+1=a+1 group by a);
select * from t1;
a b
2 1
1 2
1 3
2 4
drop table t1, t2;
create table t1 (a int not null);
create table t2 (f1 int unsigned not null, f2 int);
insert into t2 values (1, null);
create trigger tr1 before update on t1 for each row do 1;
create trigger tr2 after update on t2 for each row update t1 set a=new.f2;
update t2 set f2=1 where f1=1;
drop table t1, t2;
create table t1 (a int not null, primary key (a));
insert into t1 (a) values (1);
show columns from t1;
Field Type Null Key Default Extra
a int(11) NO PRI NULL
create trigger t1bu before update on t1 for each row begin end;
show columns from t1;
Field Type Null Key Default Extra
a int(11) NO PRI NULL
insert into t1 (a) values (3);
show columns from t1;
Field Type Null Key Default Extra
a int(11) NO PRI NULL
drop table t1;
|
