drop database if exists db_view;
create database db_view;
use db_view;
drop view if exists v_mix_tv, v_mix_1, v_mix_2, v_mix_3, vv_mix_1, vv_1, vvv_1;
drop view if exists view_v1, view_v2, view_v3, view_v4, view_v5, view_v6, view_v7;
drop table if exists view_t1_not_null, view_t1_null_default, view_t1_not_null_default;
drop view if exists view_v1_null_default, view_v1_not_null, view_v1_not_null_default;
drop table if exists view_t1, view_t2, view_t3;
set character_set_client = 45;
create table view_t1(c1 int primary key, c2 int);
create table view_t2(c3 int primary key, c4 int);
create table view_t3(c1 int primary key, c2 int);
insert into view_t1 values(1, 11), (2, 12), (3, 13);
insert into view_t2 values(10, 111), (20, 112), (30, 113);
insert into view_t3 values(100, 1111), (200, 1112), (300, 1113);
create table view_t1_not_null(c1 int primary key, c2 int not null);
create table view_t1_null_default(c1 int primary key, c2 int default 22222);
create table view_t1_not_null_default(c1 int primary key, c2 int not null default 2222);
create view view_v1_not_null as select c1,c2 from view_t1_not_null;
create view view_v1_null_default as select c1,c2 from view_t1_null_default;
create view view_v1_not_null_default as select c1,c2 from view_t1_not_null_default;
create table table_t8(c1 int null,c2 int not null);
create view view_v8 as select c1+c2 from table_t8;
desc view_v8;
Field	Type	Null	Key	Default	Extra
c1+c2	bigint(12)	YES		NULL	
create view view_v9 as select c1+c2 from table_t8 a;
desc view_v9;
Field	Type	Null	Key	Default	Extra
c1+c2	bigint(12)	YES		NULL	
drop table table_t8;
drop view view_v8;
drop view view_v9;
create or replace view view_v1 as select c1,c2 from view_t1;
select * from view_v1;
c1	c2
1	11
2	12
3	13
create or replace view view_v2(c1, c2) as select c1, c2 from view_t1;
select * from view_v2;
c1	c2
1	11
2	12
3	13
create or replace view view_v3(c2) as select c2 from view_t1;
select * from view_v3;
c2
11
12
13
create or replace view view_v4(vc2) as select c2 as vc2 from view_t1;
select * from view_v4;
vc2
11
12
13
create or replace view view_v5(vc2) as select c2 as vc2 from view_t1;
select * from view_v5;
vc2
11
12
13
create or replace view view_v6 as select c1+1 from view_t1;
select * from view_v6;
c1+1
2
3
4
create or replace view view_v7(vc1,vc2) as select c1+1 as vc1, c2+2 as vc2 from view_t1;
select * from view_v7;
vc1	vc2
2	13
3	14
4	15
create or replace view v_2t_1 as select c1,c2,c3,c4 from view_t1, view_t2;
select * from v_2t_1;
c1	c2	c3	c4
1	11	10	111
1	11	20	112
1	11	30	113
2	12	10	111
2	12	20	112
2	12	30	113
3	13	10	111
3	13	20	112
3	13	30	113
create or replace view v_3t_1(vc1, vc2, vc3, vc4, vc5, vc6) as select view_t1.c1 as vc1, view_t1.c2 as vc2, view_t2.c3 as vc3, view_t2.c4 as vc4, view_t3.c1 as vc5, view_t3.c2 as vc6 from view_t1, view_t2, view_t3;
select * from v_3t_1;
vc1	vc2	vc3	vc4	vc5	vc6
1	11	10	111	100	1111
1	11	10	111	200	1112
1	11	10	111	300	1113
1	11	20	112	100	1111
1	11	20	112	200	1112
1	11	20	112	300	1113
1	11	30	113	100	1111
1	11	30	113	200	1112
1	11	30	113	300	1113
2	12	10	111	100	1111
2	12	10	111	200	1112
2	12	10	111	300	1113
2	12	20	112	100	1111
2	12	20	112	200	1112
2	12	20	112	300	1113
2	12	30	113	100	1111
2	12	30	113	200	1112
2	12	30	113	300	1113
3	13	10	111	100	1111
3	13	10	111	200	1112
3	13	10	111	300	1113
3	13	20	112	100	1111
3	13	20	112	200	1112
3	13	20	112	300	1113
3	13	30	113	100	1111
3	13	30	113	200	1112
3	13	30	113	300	1113
create or replace view vv_1 as select c1,c2 from view_v1;
select * from vv_1;
c1	c2
1	11
2	12
3	13
create or replace view vvv_1 as select c1,c2 from vv_1;
select * from vvv_1;
c1	c2
1	11
2	12
3	13
create view v_mix_1 as select c1,c2 from view_t1;
create view vv_mix_1 as select c1,c2,c3,c4 from v_mix_1, view_t2;
select * from (select * from (select * from view_t1) as v_test, view_t2) as vv_test;
c1	c2	c3	c4
1	11	10	111
1	11	20	112
1	11	30	113
2	12	10	111
2	12	20	112
2	12	30	113
3	13	10	111
3	13	20	112
3	13	30	113
select * from vv_mix_1;
c1	c2	c3	c4
1	11	10	111
1	11	20	112
1	11	30	113
2	12	10	111
2	12	20	112
2	12	30	113
3	13	10	111
3	13	20	112
3	13	30	113
create or replace view v_mix_3 as select c1,c2 from view_t1;
select * from v_mix_3;
c1	c2
1	11
2	12
3	13
drop view if exists v_mix_tv, v_mix_1, v_mix_2, v_mix_3, vv_mix_1, vv_mix_2, vv_mix_3, vv_1, vvv_1;
drop view if exists v_2t_1, v_3t_1;
drop view if exists view_v1, view_v2, view_v3, view_v4, view_v5, view_v6, view_v7;
drop table if exists view_t1_not_null, view_t1_null_default, view_t1_not_null_default;
drop view if exists view_v1_null_default, view_v1_not_null, view_v1_not_null_default;
drop table if exists view_t1, view_t2, view_t3;
drop view if exists v1,v2,v3;
drop table if exists t1;
create table t1(c1 int primary key);
insert into t1 values(1),(2);
create view v1 as select c1 from t1;
create view v2 as (select c1 from t1);
create view v3 as ((select c1 from t1));
insert into t1 values(3),(4);
select * from v1;
c1
1
2
3
4
select * from v2;
c1
1
2
3
4
select * from v3;
c1
1
2
3
4
drop view if exists v1,v2,v3;
drop table if exists t1;
drop table if exists t1;
drop view if exists v1;
create table t1(c1 varchar(10));
insert into t1 value('test1');
insert into t1 value('test2');
create view v1 as select  c1 from t1;
select v1.c1 from v1 join t1 on v1.c1 = t1.c1;
c1
test1
test2
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE VIEW `v1` AS select `db_view`.`t1`.`c1` AS `c1` from `db_view`.`t1`	utf8mb4	utf8mb4_general_ci
drop table if exists t1;
drop view if exists v1;
drop table if exists t1;
drop view if exists v1;
create table t1(c1 int, c2 int);
insert into t1 values(1,1);
select * from t1;
c1	c2
1	1
create or replace view v1 as select c1 from t1;
select * from v1;
c1
1
create or replace view v1 as select c1,c2 from t1;
select * from v1;
c1	c2
1	1
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE VIEW `v1` AS select `db_view`.`t1`.`c1` AS `c1`,`db_view`.`t1`.`c2` AS `c2` from `db_view`.`t1`	utf8mb4	utf8mb4_general_ci
create view v1 as select c2 from t1;
ERROR 42S01: Table 'v1' already exists
drop view v1;
drop table t1;
drop table if exists t1;
drop view if exists v1;
create table t1(c1 int,c2 int);
create table t2(a int,b int);
create view v as select c1,c2 from t1;
create view vv as select c1,c2,a,b from v,t2;
select * from v;
c1	c2
select c1 from v;
c1
select * from vv;
c1	c2	a	b
select c1 from vv;
c1
alter table t1 drop column c2;
select * from v;
ERROR 42S22: View 'db_view.v' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
select * from vv;
ERROR 42S22: View 'db_view.v' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
select c1 from v;
ERROR 42S22: View 'db_view.v' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
select c1 from vv;
ERROR 42S22: View 'db_view.v' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
select c2 from v;
ERROR 42S22: View 'db_view.v' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
select c2 from vv;
ERROR 42S22: View 'db_view.v' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
alter table t1 add column c2 int;
select * from v;
c1	c2
select * from vv;
c1	c2	a	b
drop table t1;
select * from v;
ERROR 42S22: View 'db_view.v' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
select * from vv;
ERROR 42S22: View 'db_view.v' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
create table t1(c1 varchar(10), c2 datetime);
select * from v;
c1	c2
select * from vv;
c1	c2	a	b
drop table t1;
create table t1(c1 varchar(10), c2 datetime, c3 int);
select * from v;
c1	c2
select * from vv;
c1	c2	a	b
drop table t1;
create table t1(c1 int,c2 int);
insert into t1 values(1,10),(2,11);
select * from v;
c1	c2
1	10
2	11
select * from vv;
c1	c2	a	b
drop table t1;
create table t1(c1 varchar(10), c2 double, c3 int);
insert into t1 values('hello', 100.10, 1),('hello', 100.11,2);
select * from v;
c1	c2
hello	100.1
hello	100.11
select * from v;
c1	c2
hello	100.1
hello	100.11
drop table t1;
drop view v;
create table t1(c1 int, c2 int);
insert into t1 values(1,1), (2,2);
create view v as select 5 from t1 order by 1;
select * from v;
5
5
5
create view v1 as select * from t1 where c1>'1';
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE VIEW `v1` AS select `db_view`.`t1`.`c1` AS `c1`,`db_view`.`t1`.`c2` AS `c2` from `db_view`.`t1` where (`db_view`.`t1`.`c1` > '1')	utf8mb4	utf8mb4_general_ci
select * from v1;
c1	c2
2	2
drop view v, v1;
create view v as select 5, 6 from t1 order by 1,2;
select * from v;
5	6
5	6
5	6
drop view v;
create view v as select c1 + 1 from t1 order by 1;
select * from v;
c1 + 1
2
3
drop view v;
create view v as select 7 + 3 from t1 order by 1;
select * from v;
7 + 3
10
10
drop view v;
drop table if exists t1;
create table t1(a int, b int);
insert into t1 values (1,1);
create view v as select group_concat(b) from t1 group by a;
select * from v;
group_concat(b)
1
drop table if exists t1;
drop view if exists v;
create table t1(c1 datetime, c2 int);
insert into t1 values('1990-03-03 00:00:00', 2), ('2016-05-31 20:00:00', 3);
create view v as select * from t1 where c1>'1990-04-01 00:00:00';
show create view v;
View	Create View	character_set_client	collation_connection
v	CREATE VIEW `v` AS select `db_view`.`t1`.`c1` AS `c1`,`db_view`.`t1`.`c2` AS `c2` from `db_view`.`t1` where (`db_view`.`t1`.`c1` > '1990-04-01 00:00:00')	utf8mb4	utf8mb4_general_ci
select * from v;
c1	c2
2016-05-31 20:00:00	3
drop view if exists v;
drop table if exists t1;
drop view if exists v1, v2;
Warnings:
Note	1051	Unknown table 'db_view.v1'
Note	1051	Unknown table 'db_view.v2'
create table t1(col1 varchar(12) character set utf8mb4 collate utf8mb4_general_ci);
insert into t1 values('t1_val');
create view v1 as select 'v1_val' collate utf8mb4_general_ci as col1;
show create view v1;
View	Create View	character_set_client	collation_connection
v1	CREATE VIEW `v1` AS select 'v1_val' collate utf8mb4_general_ci AS `col1`	utf8mb4	utf8mb4_general_ci
create view v2 as select col1 from v1 union select col1 from t1;
show create view v2;
View	Create View	character_set_client	collation_connection
v2	CREATE VIEW `v2` AS (select `db_view`.`v1`.`col1` AS `col1` from `db_view`.`v1`) union (select `db_view`.`t1`.`col1` AS `col1` from `db_view`.`t1`)	utf8mb4	utf8mb4_general_ci
select coercibility(col1), collation(col1) from v2;
coercibility(col1)	collation(col1)
0	utf8mb4_general_ci
0	utf8mb4_general_ci
drop database if exists db_view;