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|
select 1 union ( select 2 union select 3);
1
1
2
3
explain extended
select 1 union ( select 2 union select 3);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 UNION <derived2> ALL NULL NULL NULL NULL 2 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
NULL UNION RESULT <union1,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` union /* select#4 */ select `__4`.`2` AS `2` from (/* select#2 */ select 2 AS `2` union /* select#3 */ select 3 AS `3`) `__4`
select 1 union ( select 1 union select 1);
1
1
explain extended
select 1 union ( select 1 union select 1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 UNION <derived2> ALL NULL NULL NULL NULL 2 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
NULL UNION RESULT <union1,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` union /* select#4 */ select `__4`.`1` AS `1` from (/* select#2 */ select 1 AS `1` union /* select#3 */ select 1 AS `1`) `__4`
select 1 union all ( select 1 union select 1);
1
1
1
explain extended
select 1 union all ( select 1 union select 1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 UNION <derived2> ALL NULL NULL NULL NULL 2 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` union all /* select#4 */ select `__4`.`1` AS `1` from (/* select#2 */ select 1 AS `1` union /* select#3 */ select 1 AS `1`) `__4`
select 1 union ( select 1 union all select 1);
1
1
explain extended
select 1 union ( select 1 union all select 1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 UNION <derived2> ALL NULL NULL NULL NULL 2 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union1,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` union /* select#4 */ select `__4`.`1` AS `1` from (/* select#2 */ select 1 AS `1` union all /* select#3 */ select 1 AS `1`) `__4`
select 1 union select 1 union all select 1;
1
1
1
explain extended
select 1 union select 1 union all select 1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
2 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union1,2,3> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1 */ select 1 AS `1` union /* select#2 */ select 1 AS `1` union all /* select#3 */ select 1 AS `1`
(select 1 as a) union (select 2) order by a;
a
1
2
explain extended
(select 1 as a) union (select 2) order by a;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
2 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL NULL Using filesort
Warnings:
Note 1003 (/* select#1 */ select 1 AS `a`) union (/* select#2 */ select 2 AS `2`) order by `a`
/* select#1 */ select 1 AS `a` union /* select#2 */ select 2 AS `2` order by `a`;
a
1
2
explain extended
/* select#1 */ select 1 AS `a` union /* select#2 */ select 2 AS `2` order by `a`;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
2 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL NULL Using filesort
Warnings:
Note 1003 /* select#1 */ select 1 AS `a` union /* select#2 */ select 2 AS `2` order by `a`
select 1 union ( select 1 union (select 1 union (select 1 union select 1)));
1
1
explain extended all
select 1 union ( select 1 union (select 1 union (select 1 union select 1)));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
8 UNION <derived2> ALL NULL NULL NULL NULL 2 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
7 UNION <derived3> ALL NULL NULL NULL NULL 2 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
6 UNION <derived4> ALL NULL NULL NULL NULL 2 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
5 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union4,5> ALL NULL NULL NULL NULL NULL NULL
NULL UNION RESULT <union3,6> ALL NULL NULL NULL NULL NULL NULL
NULL UNION RESULT <union2,7> ALL NULL NULL NULL NULL NULL NULL
NULL UNION RESULT <union1,8> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1/0 Filter Select: select `1` AS `1` */ select 1 AS `1` union /* select#8/0 */ select `__8`.`1` AS `1` from (/* select#2/1 Filter Select: select `1` AS `1` */ select 1 AS `1` union /* select#7/1 */ select `__7`.`1` AS `1` from (/* select#3/2 Filter Select: select `1` AS `1` */ select 1 AS `1` union /* select#6/2 */ select `__6`.`1` AS `1` from (/* select#4/3 Filter Select: select `1` AS `1` */ select 1 AS `1` union /* select#5/3 */ select 1 AS `1`) `__6`) `__7`) `__8`
#
# MDEV-6341: INSERT ... SELECT UNION with parenthesis
#
create table t1 (a int, b int);
insert into t1 (select 1,1 union select 2,2);
select * from t1 order by 1;
a b
1 1
2 2
delete from t1;
insert into t1 select 1,1 union select 2,2;
select * from t1 order by 1;
a b
1 1
2 2
drop table t1;
CREATE OR REPLACE TABLE t1 AS SELECT 1 AS a UNION SELECT 2;
select * from t1 order by 1;
a
1
2
drop table t1;
CREATE OR REPLACE TABLE t1 AS (SELECT 1 AS a UNION SELECT 2);
select * from t1 order by 1;
a
1
2
drop table t1;
CREATE OR REPLACE VIEW v1 AS (SELECT 1 AS a);
show create view v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS (select 1 AS `a`) latin1 latin1_swedish_ci
drop view v1;
CREATE OR REPLACE VIEW v1 AS SELECT 1 AS a UNION SELECT 2;
show create view v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select 1 AS `a` union select 2 AS `2` latin1 latin1_swedish_ci
drop view v1;
CREATE OR REPLACE VIEW v1 AS (SELECT 1 AS a UNION SELECT 2);
show create view v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select 1 AS `a` union select 2 AS `2` latin1 latin1_swedish_ci
drop view v1;
#
# MDEV-10028: Syntax error on ((SELECT ...) UNION (SELECT ...))
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (10);
INSERT INTO t1 VALUES (20);
INSERT INTO t1 VALUES (30);
((SELECT a FROM t1) UNION (SELECT a FROM t1));
a
10
20
30
(SELECT * FROM t1 UNION SELECT * FROM t1);
a
10
20
30
((SELECT a FROM t1) LIMIT 1);
a
10
SELECT * FROM (SELECT 1 UNION (SELECT 2 UNION SELECT 3)) t1;
1
1
2
3
DROP TABLE t1;
#
# test of several levels of ORDER BY / LIMIT
#
create table t1 (a int, b int);
insert into t1 (a,b) values (1, 100), (2, 200), (3,30), (4,4);
select a,b from t1 order by 1 limit 3;
a b
1 100
2 200
3 30
(select a,b from t1 order by 1 limit 3) order by 2 limit 2;
a b
3 30
1 100
(select 10,1000 union select a,b from t1 order by 1 limit 3) order by 2 limit 2;
10 1000
3 30
1 100
((select a,b from t1 order by 1 limit 3) order by 2 limit 2) order by 1 limit 1;
a b
1 100
((select a,b from t1 order by 1 limit 3) order by 2 limit 2) order by 1;
a b
1 100
3 30
drop table t1;
# End of 10.4 tests
|
