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SET @@session.storage_engine = 'InnoDB';
create table t1 (a int,
b int as (-a),
c int as (-a) persistent);
set sql_warnings = 1;
#
# *** INSERT ***
#
# INSERT INTO tbl_name VALUES... DEFAULT is specified against vcols
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 vcols
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 vcols
insert into t1 values (1,2,3);
Warnings:
Warning 1906 The value specified for computed column 'b' in table 't1' ignored
Warning 1906 The value specified for computed column 'c' in table 't1' ignored
select * from t1;
a b c
1 -1 -1
delete from t1;
select * from t1;
a b c
# INSERT INTO tbl_name (<non_vcol_list>) VALUES...
insert into t1 (a) values (1), (2);
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+vcols>) VALUES... DEFAULT is specified
# against vcols
insert into t1 (a,b) values (1,default), (2,default);
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+vcols>) VALUES... NULL is specified against vcols
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+vcols>) VALUES... a non-NULL value is specified
# against vcols
insert into t1 (a,b) values (1,3), (2,4);
Warnings:
Warning 1906 The value specified for computed column 'b' in table 't1' ignored
Warning 1906 The value specified for computed column 'b' in table 't1' 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-vcol field. INSERT INTO tbl_name VALUES... ON DUPLICATE
# KEY UPDATE <non_vcol>=expr, <vcol>=expr
create table t1 (a int unique,
b int as (-a),
c int as (-a) persistent);
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 vcol field. INSERT INTO tbl_name VALUES... ON DUPLICATE
# KEY UPDATE <non_vcol>=expr, <vcol>=expr
create table t1 (a int,
b int as (-a),
c int as (-a) persistent 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 select * from t1;
Warnings:
Warning 1906 The value specified for computed column 'b' in table 't2' ignored
Warning 1906 The value specified for computed column 'c' in table 't2' ignored
select * from t1;
a b c
2 -2 -2
drop table t2;
# CREATE new_table ... LIKE old_table INSERT INTO new_table (<non-vcols>, <vcols>)
# SELECT <non-vcols>, <vcols> 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,b) select a,b from t1;
Warnings:
Warning 1906 The value specified for computed column 'b' in table 't2' ignored
Warning 1906 The value specified for computed column 'b' in table 't2' ignored
select * from t2;
a b c
2 -2 -2
1 -1 -1
drop table t2;
drop table t1;
#
# *** UPDATE ***
#
# UPDATE tbl_name SET non-vcol=expr WHERE non-vcol=expr
create table t1 (a int,
b int as (-a),
c int as (-a) persistent);
insert into t1 (a) values (1), (2);
select * from t1;
a b c
1 -1 -1
2 -2 -2
update t1 set a=3 where a=2;
select * from t1;
a b c
1 -1 -1
3 -3 -3
delete from t1;
select * from t1;
a b c
# UPDATE tbl_name SET vcol=expr WHERE non-vcol=expr
insert into t1 (a) values (1), (2);
select * from t1;
a b c
1 -1 -1
2 -2 -2
update t1 set c=3 where a=2;
Warnings:
Warning 1906 The value specified for computed column 'c' in table 't1' ignored
select * from t1;
a b c
1 -1 -1
2 -2 -2
delete from t1;
select * from t1;
a b c
# UPDATE tbl_name SET non-vcol=expr WHERE vcol=expr
insert into t1 (a) values (1), (2);
select * from t1;
a b c
1 -1 -1
2 -2 -2
update t1 set a=3 where b=-2;
select * from t1;
a b c
1 -1 -1
3 -3 -3
delete from t1;
select * from t1;
a b c
# UPDATE tbl_name SET vcol=expr WHERE vcol=expr
insert into t1 (a) values (1), (2);
select * from t1;
a b c
1 -1 -1
2 -2 -2
update t1 set c=3 where b=-2;
Warnings:
Warning 1906 The value specified for computed column 'c' in table 't1' 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;
# INDEX created on vcol
# UPDATE tbl_name SET non-vcol=expr WHERE vcol=const
create table t1 (a int,
b int as (-a),
c int as (-a) persistent unique);
insert into t1 (a) values (1), (2);
select * from t1;
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 vcol
# UPDATE tbl_name SET non-vcol=expr WHERE vcol=between const1 and const2
insert into t1 (a) values (1), (2);
select * from t1;
a b c
1 -1 -1
2 -2 -2
update t1 set a=3 where c between -3 and -2;
select * from t1;
a b c
1 -1 -1
3 -3 -3
delete from t1;
select * from t1;
a b c
# No INDEX created on vcol
# UPDATE tbl_name SET non-vcol=expr WHERE vcol=between const1 and const2
insert into t1 (a) values (1), (2);
select * from t1;
a b c
1 -1 -1
2 -2 -2
update t1 set a=3 where b between -3 and -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 vcol
# UPDATE tbl_name SET non-vcol=expr
# WHERE vcol=between const1 and const2 ORDER BY vcol
insert into t1 (a) values (1), (2), (3), (4), (5);
select * from t1;
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;
a b c
6 -6 -6
2 -2 -2
3 -3 -3
4 -4 -4
5 -5 -5
delete from t1 where c between -6 and 0;
select * from t1;
a b c
# INDEX created on vcol
# UPDATE tbl_name SET non-vcol=expr
# WHERE vcol=between const1 and const2 ORDER BY vcol LIMIT 2
insert into t1 (a) values (1), (2), (3), (4), (5);
select * from t1;
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;
a b c
6 -6 -6
2 -2 -2
3 -3 -3
4 -4 -4
5 -5 -5
delete from t1 where c between -2 and 0 order by c;
select * from t1;
a b c
6 -6 -6
3 -3 -3
4 -4 -4
5 -5 -5
delete from t1;
# INDEX created on vcol
# UPDATE tbl_name SET non-vcol=expr
# WHERE indexed vcol=between const1 and const2 and non-indexed vcol=const3
insert into t1 (a) values (1), (2), (3), (4), (5);
select * from t1;
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;
a b c
6 -6 -6
2 -2 -2
3 -3 -3
4 -4 -4
5 -5 -5
delete from t1;
# INDEX created on vcol
# UPDATE tbl_name SET non-vcol=expr
# WHERE indexed vcol=between const1 and const2 and non-indexed vcol=const3
# ORDER BY indexed vcol
insert into t1 (a) values (1), (2), (3), (4), (5);
select * from t1;
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;
a b c
6 -6 -6
2 -2 -2
3 -3 -3
4 -4 -4
5 -5 -5
delete from t1;
drop table t1;
#
# Verify ON UPDATE/DELETE actions of FOREIGN KEYs
create table t2 (a int primary key, name varchar(10));
create table t1 (a int primary key, b int as (a % 10) persistent);
insert into t2 values (1, 'value1'), (2,'value2'), (3,'value3');
insert into t1 (a) values (1),(2),(3);
select * from t1;
a b
1 1
2 2
3 3
select * from t2;
a name
1 value1
2 value2
3 value3
select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
a b name
1 1 value1
2 2 value2
3 3 value3
# - ON UPDATE RESTRICT
alter table t1 add foreign key (b) references t2(a) on update restrict;
insert into t1 (a) values (4);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
update t2 set a=4 where a=3;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
a b name
1 1 value1
2 2 value2
3 3 value3
alter table t1 drop foreign key t1_ibfk_1;
# - ON DELETE RESTRICT
alter table t1 add foreign key (b) references t2(a) on delete restrict;
delete from t2 where a=3;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
a b name
1 1 value1
2 2 value2
3 3 value3
select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
a b name
1 1 value1
2 2 value2
3 3 value3
alter table t1 drop foreign key t1_ibfk_1;
# - ON DELETE CASCADE
alter table t1 add foreign key (b) references t2(a) on delete cascade;
delete from t2 where a=3;
select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
a b name
1 1 value1
2 2 value2
select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
a b name
1 1 value1
2 2 value2
alter table t1 drop foreign key t1_ibfk_1;
drop table t1;
drop table t2;
#
# *** REPLACE ***
#
# UNIQUE INDEX on vcol
# REPLACE tbl_name (non-vcols) VALUES (non-vcols);
create table t1 (a int,
b int as (-a),
c int as (-a) persistent unique,
d varchar(16));
insert into t1 (a,d) values (1,'a'), (2,'b');
select * from t1;
a b c d
1 -1 -1 a
2 -2 -2 b
replace t1 (a,d) values (1,'c');
select * from t1;
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;
|
