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MDEV-3862 Lift limitation for merging VIEWS with Subqueries in SELECT list.

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2012-11-20 15:11:22 +02:00
parent 49b1d95e4c
commit 6d179d7c73
6 changed files with 170 additions and 31 deletions
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106
mysql-test/r/view.result
View File

@@ -4825,4 +4825,110 @@ drop tables t1,t2;
# -----------------------------------------------------------------
# -- End of 5.3 tests.
# -----------------------------------------------------------------
# some subqueries in SELECT list test
create table t1 (a int, b int);
create table t2 (a int, b int);
insert into t1 values (1,2), (3,4), (3,3), (5,6), (7,8), (9,10);
insert into t2 values (1,2), (3,4), (3,3), (5,6), (7,8), (9,10);
create algorithm=merge view v1 as select t1.a as a, (select max(b) from t2 where t1.a=t2.a) as c from t1;
explain extended
select * from v1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 100.00
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
Note 1003 select `test`.`t1`.`a` AS `a`,(select max(`test`.`t2`.`b`) from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)) AS `c` from `test`.`t1`
select * from v1;
a c
1 2
3 4
3 4
5 6
7 8
9 10
explain extended
select * from t2, v1 where t2.a=v1.a;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t1`.`a` AS `a`,(select max(`test`.`t2`.`b`) from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)) AS `c` from `test`.`t2` join `test`.`t1` where (`test`.`t1`.`a` = `test`.`t2`.`a`)
select * from t2, v1 where t2.a=v1.a;
a b a c
1 2 1 2
3 4 3 4
3 3 3 4
3 4 3 4
3 3 3 4
5 6 5 6
7 8 7 8
9 10 9 10
explain extended
select * from t1, v1 where t1.a=v1.a;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`a` AS `a`,(select max(`test`.`t2`.`b`) from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)) AS `c` from `test`.`t1` join `test`.`t1` where (`test`.`t1`.`a` = `test`.`t1`.`a`)
select * from t1, v1 where t1.a=v1.a;
a b a c
1 2 1 2
3 4 3 4
3 3 3 4
3 4 3 4
3 3 3 4
5 6 5 6
7 8 7 8
9 10 9 10
explain extended
select * from t1, v1 where t1.b=v1.c;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`a` AS `a`,(select max(`test`.`t2`.`b`) from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)) AS `c` from `test`.`t1` join `test`.`t1` where (`test`.`t1`.`b` = (select max(`test`.`t2`.`b`) from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)))
select * from t1, v1 where t1.b=v1.c;
a b a c
1 2 1 2
3 4 3 4
3 4 3 4
5 6 5 6
7 8 7 8
9 10 9 10
explain extended
select * from t2, t1, v1 where t1.a=t2.a and t1.a=v1.a;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (incremental, BNL join)
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`a` AS `a`,(select max(`test`.`t2`.`b`) from `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`)) AS `c` from `test`.`t2` join `test`.`t1` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`a` = `test`.`t2`.`a`))
select * from t2, t1, v1 where t1.a=t2.a and t1.a=v1.a;
a b a b a c
1 2 1 2 1 2
3 4 3 4 3 4
3 3 3 4 3 4
3 4 3 3 3 4
3 3 3 3 3 4
3 4 3 4 3 4
3 3 3 4 3 4
3 4 3 3 3 4
3 3 3 3 3 4
5 6 5 6 5 6
7 8 7 8 7 8
9 10 9 10 9 10
drop view v1;
drop table t1,t2;
# -----------------------------------------------------------------
# -- End of 10.0 tests.
# -----------------------------------------------------------------
SET optimizer_switch=@save_optimizer_switch;

22
mysql-test/suite/funcs_1/r/innodb_views.result
View File

@@ -22340,10 +22340,9 @@ SET @variant2= 'CREATE VIEW v1 AS SELECT DISTINCTROW(f61) FROM t1';
SET @variant3= 'CREATE VIEW v1 AS SELECT SUM(f59) AS f61 FROM t1';
SET @variant4= 'CREATE VIEW v1 AS SELECT f61 FROM t1 GROUP BY f61';
SET @variant5= 'CREATE VIEW v1 AS SELECT f61 FROM t1 HAVING f61 > 0';
SET @variant6= 'CREATE VIEW v1 AS SELECT (SELECT f60 FROM t2 WHERE f59=19) AS f61 FROM t1';
SET @variant7= 'CREATE VIEW v1 AS SELECT f61 FROM v2';
SET @variant8= 'CREATE VIEW v1 AS SELECT f59 AS f61 FROM t1 WHERE f60 IN (SELECT f59 FROM t1)';
SET @variant9= 'CREATE ALGORITHM = TEMPTABLE VIEW v1 (f61) AS select f60 from t1';
SET @variant6= 'CREATE VIEW v1 AS SELECT f61 FROM v2';
SET @variant7= 'CREATE VIEW v1 AS SELECT f59 AS f61 FROM t1 WHERE f60 IN (SELECT f59 FROM t1)';
SET @variant8= 'CREATE ALGORITHM = TEMPTABLE VIEW v1 (f61) AS select f60 from t1';
CREATE ALGORITHM = TEMPTABLE VIEW v1 (f61) AS select f60 from t1;
INSERT INTO v1 VALUES (1002);
ERROR HY000: The target table v1 of the INSERT is not insertable-into
@@ -22368,14 +22367,6 @@ ERROR HY000: The target table v1 of the UPDATE is not updatable
DELETE FROM v1;
ERROR HY000: The target table v1 of the DELETE is not updatable
DROP VIEW v1;
CREATE VIEW v1 AS SELECT (SELECT f60 FROM t2 WHERE f59=19) AS f61 FROM t1;
INSERT INTO v1 VALUES (1002);
ERROR HY000: The target table v1 of the INSERT is not insertable-into
UPDATE v1 SET f61=1007;
ERROR HY000: The target table v1 of the UPDATE is not updatable
DELETE FROM v1;
ERROR HY000: The target table v1 of the DELETE is not updatable
DROP VIEW v1;
CREATE VIEW v1 AS SELECT f61 FROM t1 HAVING f61 > 0;
INSERT INTO v1 VALUES (1002);
ERROR HY000: The target table v1 of the INSERT is not insertable-into
@@ -22416,6 +22407,13 @@ ERROR HY000: The target table v1 of the UPDATE is not updatable
DELETE FROM v1;
ERROR HY000: The target table v1 of the DELETE is not updatable
DROP VIEW v1;
CREATE VIEW v1 AS SELECT (SELECT f60 FROM t2 WHERE f59=19) AS f61 FROM t1;
INSERT INTO v1 VALUES (1002);
ERROR HY000: The target table v1 of the INSERT is not insertable-into
UPDATE v1 SET f61=1007;
ERROR HY000: Column 'f61' is not updatable
DELETE FROM v1;
DROP VIEW v1;
Drop TABLE t1, t2 ;
Drop VIEW v2 ;

22
mysql-test/suite/funcs_1/r/memory_views.result
View File

@@ -22342,10 +22342,9 @@ SET @variant2= 'CREATE VIEW v1 AS SELECT DISTINCTROW(f61) FROM t1';
SET @variant3= 'CREATE VIEW v1 AS SELECT SUM(f59) AS f61 FROM t1';
SET @variant4= 'CREATE VIEW v1 AS SELECT f61 FROM t1 GROUP BY f61';
SET @variant5= 'CREATE VIEW v1 AS SELECT f61 FROM t1 HAVING f61 > 0';
SET @variant6= 'CREATE VIEW v1 AS SELECT (SELECT f60 FROM t2 WHERE f59=19) AS f61 FROM t1';
SET @variant7= 'CREATE VIEW v1 AS SELECT f61 FROM v2';
SET @variant8= 'CREATE VIEW v1 AS SELECT f59 AS f61 FROM t1 WHERE f60 IN (SELECT f59 FROM t1)';
SET @variant9= 'CREATE ALGORITHM = TEMPTABLE VIEW v1 (f61) AS select f60 from t1';
SET @variant6= 'CREATE VIEW v1 AS SELECT f61 FROM v2';
SET @variant7= 'CREATE VIEW v1 AS SELECT f59 AS f61 FROM t1 WHERE f60 IN (SELECT f59 FROM t1)';
SET @variant8= 'CREATE ALGORITHM = TEMPTABLE VIEW v1 (f61) AS select f60 from t1';
CREATE ALGORITHM = TEMPTABLE VIEW v1 (f61) AS select f60 from t1;
INSERT INTO v1 VALUES (1002);
ERROR HY000: The target table v1 of the INSERT is not insertable-into
@@ -22370,14 +22369,6 @@ ERROR HY000: The target table v1 of the UPDATE is not updatable
DELETE FROM v1;
ERROR HY000: The target table v1 of the DELETE is not updatable
DROP VIEW v1;
CREATE VIEW v1 AS SELECT (SELECT f60 FROM t2 WHERE f59=19) AS f61 FROM t1;
INSERT INTO v1 VALUES (1002);
ERROR HY000: The target table v1 of the INSERT is not insertable-into
UPDATE v1 SET f61=1007;
ERROR HY000: The target table v1 of the UPDATE is not updatable
DELETE FROM v1;
ERROR HY000: The target table v1 of the DELETE is not updatable
DROP VIEW v1;
CREATE VIEW v1 AS SELECT f61 FROM t1 HAVING f61 > 0;
INSERT INTO v1 VALUES (1002);
ERROR HY000: The target table v1 of the INSERT is not insertable-into
@@ -22418,6 +22409,13 @@ ERROR HY000: The target table v1 of the UPDATE is not updatable
DELETE FROM v1;
ERROR HY000: The target table v1 of the DELETE is not updatable
DROP VIEW v1;
CREATE VIEW v1 AS SELECT (SELECT f60 FROM t2 WHERE f59=19) AS f61 FROM t1;
INSERT INTO v1 VALUES (1002);
ERROR HY000: The target table v1 of the INSERT is not insertable-into
UPDATE v1 SET f61=1007;
ERROR HY000: Column 'f61' is not updatable
DELETE FROM v1;
DROP VIEW v1;
Drop TABLE t1, t2 ;
Drop VIEW v2 ;

19
mysql-test/suite/funcs_1/views/views_master.inc
View File

@@ -3812,16 +3812,14 @@ SET @variant3= 'CREATE VIEW v1 AS SELECT SUM(f59) AS f61 FROM t1';
SET @variant4= 'CREATE VIEW v1 AS SELECT f61 FROM t1 GROUP BY f61';
# For HAVING 3.3.2.16
SET @variant5= 'CREATE VIEW v1 AS SELECT f61 FROM t1 HAVING f61 > 0';
# For a sub query in the select list 3.3.2.17
SET @variant6= 'CREATE VIEW v1 AS SELECT (SELECT f60 FROM t2 WHERE f59=19) AS f61 FROM t1';
# For a WHERE clause sub query that refers to a table also referenced in a
# FROM clause 3.3.2.18
SET @variant7= 'CREATE VIEW v1 AS SELECT f61 FROM v2';
SET @variant8= 'CREATE VIEW v1 AS SELECT f59 AS f61 FROM t1 WHERE f60 IN (SELECT f59 FROM t1)';
SET @variant6= 'CREATE VIEW v1 AS SELECT f61 FROM v2';
SET @variant7= 'CREATE VIEW v1 AS SELECT f59 AS f61 FROM t1 WHERE f60 IN (SELECT f59 FROM t1)';
# For ALGORITHM = TEMPTABLE 3.3.2.20
SET @variant9= 'CREATE ALGORITHM = TEMPTABLE VIEW v1 (f61) AS select f60 from t1';
SET @variant8= 'CREATE ALGORITHM = TEMPTABLE VIEW v1 (f61) AS select f60 from t1';
let $num= 9;
let $num= 8;
while ($num)
{
--disable_abort_on_error
@@ -3844,6 +3842,15 @@ while ($num)
DROP VIEW v1;
dec $num;
}
# For a sub query in the select list 3.3.2.17
CREATE VIEW v1 AS SELECT (SELECT f60 FROM t2 WHERE f59=19) AS f61 FROM t1;
--error ER_NON_INSERTABLE_TABLE
INSERT INTO v1 VALUES (1002);
--error ER_NONUPDATEABLE_COLUMN
UPDATE v1 SET f61=1007;
# no error ER_NON_UPDATABLE_TABLE, because we can find columns for deleting
DELETE FROM v1;
DROP VIEW v1;
Drop TABLE t1, t2 ;
Drop VIEW v2 ;

29
mysql-test/t/view.test
View File

@@ -4751,4 +4751,33 @@ drop tables t1,t2;
--echo # -- End of 5.3 tests.
--echo # -----------------------------------------------------------------
--echo # some subqueries in SELECT list test
create table t1 (a int, b int);
create table t2 (a int, b int);
insert into t1 values (1,2), (3,4), (3,3), (5,6), (7,8), (9,10);
insert into t2 values (1,2), (3,4), (3,3), (5,6), (7,8), (9,10);
create algorithm=merge view v1 as select t1.a as a, (select max(b) from t2 where t1.a=t2.a) as c from t1;
explain extended
select * from v1;
select * from v1;
explain extended
select * from t2, v1 where t2.a=v1.a;
select * from t2, v1 where t2.a=v1.a;
explain extended
select * from t1, v1 where t1.a=v1.a;
select * from t1, v1 where t1.a=v1.a;
explain extended
select * from t1, v1 where t1.b=v1.c;
select * from t1, v1 where t1.b=v1.c;
explain extended
select * from t2, t1, v1 where t1.a=t2.a and t1.a=v1.a;
select * from t2, t1, v1 where t1.a=t2.a and t1.a=v1.a;
drop view v1;
drop table t1,t2;
--echo # -----------------------------------------------------------------
--echo # -- End of 10.0 tests.
--echo # -----------------------------------------------------------------
SET optimizer_switch=@save_optimizer_switch;

3
sql/sql_lex.cc
View File

@@ -2595,7 +2595,8 @@ bool LEX::can_be_merged()
if (tmp_unit->first_select()->parent_lex == this &&
(tmp_unit->item == 0 ||
(tmp_unit->item->place() != IN_WHERE &&
tmp_unit->item->place() != IN_ON)))
tmp_unit->item->place() != IN_ON &&
tmp_unit->item->place() != SELECT_LIST)))
{
selects_allow_merge= 0;
break;