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Commit 8e3aed8d authored by Sergey Petrunya's avatar Sergey Petrunya
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MWL#90: Subqueries: Inside-out execution for non-semijoin materialized... 

MWL#90: Subqueries: Inside-out execution for non-semijoin materialized subqueries that are AND-parts of the WHERE
- Merge into 5.3-subqueries
parents 42bf35a7 db8c2841
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Showing with 1269 additions and 675 deletions
mysql-test/include/mix1.inc
View file @ 8e3aed8d
......@@ -1522,6 +1522,12 @@ INSERT INTO t1 VALUES (1,1,1), (1,1,1), (1,1,2), (1,1,1), (1,1,2);
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
--echo # MariaDB note:
--echo # This will show 2 for table which has 5 rows.
--echo # This is because the access method employed is actually range access
--echo # which scans 2 records (yes, EXPLAIN displays it incorrectly).
--echo # our correct printing is an artifact of changing in select_describe()
--echo # from printing table->starts.records() to tab->records.
EXPLAIN
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
......@@ -1535,6 +1541,7 @@ INSERT INTO t1 VALUES (1,1,1), (1,1,1), (1,1,2), (1,1,1), (1,1,2);
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
--echo # See above "MariaDB note"
EXPLAIN
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
......@@ -1549,6 +1556,7 @@ INSERT INTO t1 VALUES (1,1,1), (1,1,1), (1,1,2), (1,1,1), (1,1,2);
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
--echo # See above "MariaDB note"
EXPLAIN
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
......
mysql-test/r/group_min_max.result
View file @ 8e3aed8d
......@@ -2255,7 +2255,8 @@ id select_type table type possible_keys key key_len ref rows Extra
EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE
a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1_outer index NULL a 10 NULL 15 Using where; Using index
1 PRIMARY SUBQUERY#2 ALL distinct_key NULL NULL NULL 8
1 PRIMARY t1_outer ref a a 5 SUBQUERY#2.max(b) 2 Using index
2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by
EXPLAIN SELECT 1 FROM t1 AS t1_outer GROUP BY a HAVING
a > (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
......
mysql-test/r/innodb_mysql.result
View file @ 8e3aed8d
......@@ -1727,12 +1727,18 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
1
1
# MariaDB note:
# This will show 2 for table which has 5 rows.
# This is because the access method employed is actually range access
# which scans 2 records (yes, EXPLAIN displays it incorrectly).
# our correct printing is an artifact of changing in select_describe()
# from printing table->starts.records() to tab->records.
EXPLAIN
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 index c3,c2 c2 10 NULL 5
2 DERIVED t1 index c3,c2 c2 10 NULL 2
DROP TABLE t1;
CREATE TABLE t1 (c1 REAL, c2 REAL, c3 REAL, KEY (c3), KEY (c2, c3))
ENGINE=InnoDB;
......@@ -1741,12 +1747,13 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
1
1
# See above "MariaDB note"
EXPLAIN
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 index c3,c2 c2 18 NULL 5
2 DERIVED t1 index c3,c2 c2 18 NULL 2
DROP TABLE t1;
CREATE TABLE t1 (c1 DECIMAL(12,2), c2 DECIMAL(12,2), c3 DECIMAL(12,2),
KEY (c3), KEY (c2, c3))
......@@ -1756,12 +1763,13 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
1
1
# See above "MariaDB note"
EXPLAIN
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 index c3,c2 c2 14 NULL 5
2 DERIVED t1 index c3,c2 c2 14 NULL 2
DROP TABLE t1;
End of 5.1 tests
drop table if exists t1, t2, t3;
......
mysql-test/r/metadata.result
View file @ 8e3aed8d
......@@ -55,7 +55,7 @@ id data data
2 female no
select t1.id from t1 union select t2.id from t2;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def id id 1 4 1 Y 32768 0 63
def id id 1 4 1 Y 49152 0 63
id
1
2
......@@ -66,7 +66,7 @@ insert into t1 values (2,'two');
set @arg00=1 ;
select @arg00 FROM t1 where a=1 union distinct select 1 FROM t1 where a=1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def @arg00 @arg00 8 20 1 Y 32768 0 63
def @arg00 @arg00 8 20 1 Y 49152 0 63
@arg00
1
select * from (select @arg00) aaa;
......@@ -76,7 +76,7 @@ def aaa @arg00 @arg00 8 20 1 Y 32768 0 63
1
select 1 union select 1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def 1 1 8 20 1 N 32769 0 63
def 1 1 8 20 1 N 49153 0 63
1
1
select * from (select 1 union select 1) aaa;
......
mysql-test/r/myisam_mrr.result
View file @ 8e3aed8d
......@@ -347,7 +347,7 @@ GROUP BY t2.pk
);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 SUBQUERY t2 ALL int_key int_key 5 3 33.33 Using index condition; Using filesort
2 SUBQUERY t2 ALL int_key int_key 5 0 0.00 Using index condition; Using filesort
Warnings:
Note 1003 select min(`test`.`t1`.`pk`) AS `MIN(t1.pk)` from `test`.`t1` where 0
DROP TABLE t1, t2;
......
mysql-test/r/partition.result
View file @ 8e3aed8d
......@@ -1382,7 +1382,7 @@ NULL
2
explain partitions select * from t1 where a is null or a < 0 or a > 1;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pn,p2 ALL NULL NULL NULL NULL 4 Using where
1 SIMPLE t1 pn,p2 ALL NULL NULL NULL NULL 2 Using where
drop table t1;
CREATE TABLE t1 (id INT NOT NULL PRIMARY KEY, name VARCHAR(20))
ENGINE=MyISAM DEFAULT CHARSET=latin1
......
mysql-test/r/partition_hash.result
View file @ 8e3aed8d
......@@ -69,25 +69,25 @@ id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 9 Using where
explain partitions select * from t1 where a is null or (a >= 5 and a <= 7);
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p2,p3 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p0,p2,p3 ALL NULL NULL NULL NULL 7 Using where
explain partitions select * from t1 where a is null;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 3 Using where
explain partitions select * from t1 where a is not null;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 9 Using where
explain partitions select * from t1 where a >= 1 and a < 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 5 Using where
explain partitions select * from t1 where a >= 3 and a <= 5;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p1,p2 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p1,p2 ALL NULL NULL NULL NULL 4 Using where
explain partitions select * from t1 where a > 2 and a < 4;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p1 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p1 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a > 3 and a <= 6;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p2,p3 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p2,p3 ALL NULL NULL NULL NULL 4 Using where
explain partitions select * from t1 where a > 5;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 9 Using where
......
mysql-test/r/partition_pruning.result
View file @ 8e3aed8d
This diff is collapsed.
mysql-test/r/partition_range.result
View file @ 8e3aed8d
......@@ -59,13 +59,13 @@ id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull system NULL NULL NULL NULL 1
explain partitions select * from t1 where a >= 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a < 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
explain partitions select * from t1 where a <= 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull,p0 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 pnull,p0 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a > 1;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
......@@ -98,16 +98,16 @@ select * from t1 where a > 1;
a b
explain partitions select * from t1 where a is null;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 6 Using where
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a >= 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0_p0sp0,p0_p0sp1,p1_p1sp0,p1_p1sp1 ALL NULL NULL NULL NULL 6 Using where
1 SIMPLE t1 p0_p0sp0,p0_p0sp1,p1_p1sp0,p1_p1sp1 ALL NULL NULL NULL NULL 4 Using where
explain partitions select * from t1 where a < 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 6 Using where
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a <= 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1,p0_p0sp0,p0_p0sp1 ALL NULL NULL NULL NULL 6 Using where
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1,p0_p0sp0,p0_p0sp1 ALL NULL NULL NULL NULL 4 Using where
explain partitions select * from t1 where a > 1;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
......
mysql-test/r/subselect.result
View file @ 8e3aed8d
......@@ -3417,7 +3417,8 @@ AAA 8
EXPLAIN
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 9 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 9
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 23 test.t1.a,test.t1.b 1
2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
ALTER TABLE t1 ADD INDEX(a);
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
......@@ -3428,7 +3429,8 @@ AAA 8
EXPLAIN
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 9 Using where
1 PRIMARY t1 ALL a NULL NULL NULL 9
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 23 test.t1.a,test.t1.b 1
2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
DROP TABLE t1;
create table t1( f1 int,f2 int);
......@@ -4322,16 +4324,18 @@ CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 GROUP BY a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY SUBQUERY#2 const distinct_key distinct_key 4 const 1 100.00
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
Warnings:
Note 1003 select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,1 in ( <materialize> (select 1 AS `1` from `test`.`t1` group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `materialized subselect`.`1`)))))
Note 1003 select 1 AS `1` from <materialize> (select 1 AS `1` from `test`.`t1` group by `test`.`t1`.`a`) join `test`.`t1` where (`SUBQUERY#2`.`1` = 1)
EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 WHERE a > 3 GROUP BY a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY SUBQUERY#2 const distinct_key distinct_key 4 const 1 100.00
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary; Using filesort
Warnings:
Note 1003 select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,1 in ( <materialize> (select 1 AS `1` from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `materialized subselect`.`1`)))))
Note 1003 select 1 AS `1` from <materialize> (select 1 AS `1` from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a`) join `test`.`t1` where (`SUBQUERY#2`.`1` = 1)
DROP TABLE t1;
#
# Bug#45061: Incorrectly market field caused wrong result.
......
mysql-test/r/subselect3.result
View file @ 8e3aed8d
......@@ -1017,7 +1017,7 @@ update t22 set c = '2005-12-08 15:58:27' where a = 255;
explain select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where
......@@ -1035,7 +1035,7 @@ select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) a
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY X ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY subselect3 eq_ref unique_key unique_key 5 func 1
2 DEPENDENT SUBQUERY SUBQUERY#3 eq_ref unique_key unique_key 5 func 1
3 SUBQUERY Z ALL NULL NULL NULL NULL 2
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
subq
......@@ -1158,7 +1158,7 @@ create table t3 ( a int , filler char(100), key(a));
insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B;
explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 2
1 PRIMARY t3 ref a a 5 test.t2.a 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
select * from t3 where a in (select a from t2);
......@@ -1207,29 +1207,33 @@ insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C
explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 10
1 PRIMARY t3 ref a a 5 test.t2.a 10
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY A ALL NULL NULL NULL NULL 10
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 5 test.A.a 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 5 test.t2.a 1
2 SUBQUERY A ALL NULL NULL NULL NULL 10
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 5 test.t2.a 1
2 SUBQUERY A ALL NULL NULL NULL NULL 10
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
explain select straight_join * from t2 X, t2 Y
where X.a in (select straight_join A.a from t1 A, t1 B);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY X ALL NULL NULL NULL NULL 10
1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 5 test.X.a 1
2 SUBQUERY A ALL NULL NULL NULL NULL 10
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
create table t0 (a int, b int);
......@@ -1237,14 +1241,14 @@ insert into t0 values(1,1);
explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 system NULL NULL NULL NULL 1
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 10
1 PRIMARY t3 ref a a 5 test.t2.a 10
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
create table t4 as select a as x, a as y from t1;
explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 system NULL NULL NULL NULL 1
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 10
1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where
2 SUBQUERY t4 ALL NULL NULL NULL NULL 10 Using where
drop table t0,t1,t2,t3,t4;
......@@ -1270,14 +1274,14 @@ set @@optimizer_switch='firstmatch=off';
explain select * from t1 where (a,b) in (select a,b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 10 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 100
set @save_optimizer_search_depth=@@optimizer_search_depth;
set @@optimizer_search_depth=63;
explain select * from t1 where (a,b) in (select a,b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 10 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 100
set @@optimizer_search_depth=@save_optimizer_search_depth;
set @@optimizer_switch=default;
......@@ -1316,7 +1320,7 @@ insert into t2 select * from t2;
explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY subselect2 eq_ref unique_key unique_key 15 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 15 func 1
2 SUBQUERY X ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer
2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer
......@@ -1389,7 +1393,7 @@ INNER JOIN t2 c ON c.idContact=cona.idContact
WHERE cona.postalStripped='T2H3B2'
);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2 1.00
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 2 1.00
1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer
2 SUBQUERY cona ALL NULL NULL NULL NULL 2 100.00 Using where
2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00
......
mysql-test/r/subselect3_jcl6.result
View file @ 8e3aed8d
......@@ -1021,7 +1021,7 @@ update t22 set c = '2005-12-08 15:58:27' where a = 255;
explain select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where
......@@ -1040,7 +1040,7 @@ select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) a
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY X ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where
2 DEPENDENT SUBQUERY subselect3 eq_ref unique_key unique_key 5 func 1
2 DEPENDENT SUBQUERY SUBQUERY#3 eq_ref unique_key unique_key 5 func 1
3 SUBQUERY Z ALL NULL NULL NULL NULL 2
select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
subq
......@@ -1163,7 +1163,7 @@ create table t3 ( a int , filler char(100), key(a));
insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B;
explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 2
1 PRIMARY t3 ref a a 5 test.t2.a 1 Using join buffer
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
select * from t3 where a in (select a from t2);
......@@ -1212,29 +1212,33 @@ insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C
explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 10
1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY A ALL NULL NULL NULL NULL 10
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 5 test.A.a 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 5 test.t2.a 1
2 SUBQUERY A ALL NULL NULL NULL NULL 10
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 5 test.t2.a 1
2 SUBQUERY A ALL NULL NULL NULL NULL 10
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
explain select straight_join * from t2 X, t2 Y
where X.a in (select straight_join A.a from t1 A, t1 B);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY X ALL NULL NULL NULL NULL 10
1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 5 test.X.a 1
2 SUBQUERY A ALL NULL NULL NULL NULL 10
2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer
create table t0 (a int, b int);
......@@ -1242,14 +1246,14 @@ insert into t0 values(1,1);
explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 system NULL NULL NULL NULL 1
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 10
1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer
2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
create table t4 as select a as x, a as y from t1;
explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 system NULL NULL NULL NULL 1
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 10
1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; Using join buffer
2 SUBQUERY t4 ALL NULL NULL NULL NULL 10 Using where
drop table t0,t1,t2,t3,t4;
......@@ -1275,14 +1279,14 @@ set @@optimizer_switch='firstmatch=off';
explain select * from t1 where (a,b) in (select a,b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 10 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 100
set @save_optimizer_search_depth=@@optimizer_search_depth;
set @@optimizer_search_depth=63;
explain select * from t1 where (a,b) in (select a,b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 10 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 100
set @@optimizer_search_depth=@save_optimizer_search_depth;
set @@optimizer_switch=default;
......@@ -1321,7 +1325,7 @@ insert into t2 select * from t2;
explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY subselect2 eq_ref unique_key unique_key 15 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 15 func 1
2 SUBQUERY X ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer
2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer
......@@ -1394,7 +1398,7 @@ INNER JOIN t2 c ON c.idContact=cona.idContact
WHERE cona.postalStripped='T2H3B2'
);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2 1.00
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 2 1.00
1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer
2 SUBQUERY cona ALL NULL NULL NULL NULL 2 100.00 Using where
2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using join buffer
......
mysql-test/r/subselect4.result
View file @ 8e3aed8d
......@@ -216,7 +216,7 @@ FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
......@@ -231,13 +231,13 @@ WHERE EMPNUM IN
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
1 SIMPLE SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
DEALLOCATE PREPARE stmt;
......@@ -254,7 +254,7 @@ FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
......@@ -269,13 +269,13 @@ WHERE EMPNUM IN
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
1 SIMPLE SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
DEALLOCATE PREPARE stmt;
......@@ -291,7 +291,7 @@ FROM t2
WHERE PTYPE = 'Design'));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
......@@ -306,13 +306,13 @@ WHERE EMPNUM IN
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
EXECUTE stmt;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1
1 SIMPLE SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
DEALLOCATE PREPARE stmt;
......
mysql-test/r/subselect_mat.result
View file @ 8e3aed8d
This diff is collapsed.
mysql-test/r/subselect_no_semijoin.result
View file @ 8e3aed8d
This diff is collapsed.
mysql-test/r/subselect_sj.result
View file @ 8e3aed8d
......@@ -848,7 +848,7 @@ INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii','iiii','ffff','ffff','ffff','f
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY subselect2 eq_ref unique_key unique_key 13 func 1 1.00
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 13 func 1 1.00
2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using MRR
Warnings:
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`pk` > 0))
......@@ -1017,7 +1017,7 @@ FROM t1
WHERE `varchar_nokey` < 'n' XOR `pk` ) ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00
1 PRIMARY subselect2 eq_ref unique_key unique_key 8 func 1 1.00
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 8 func 1 1.00
2 SUBQUERY t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where
Warnings:
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key`) and ((`test`.`t1`.`varchar_nokey` < 'n') xor `test`.`t1`.`pk`))
......
mysql-test/r/subselect_sj2.result
View file @ 8e3aed8d
......@@ -32,7 +32,7 @@ a b
9 5
explain select * from t2 where b in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 3
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 3
1 PRIMARY t2 ref b b 5 test.t1.a 2
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3
select * from t2 where b in (select a from t1);
......@@ -74,7 +74,7 @@ A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a
from t0 A, t0 B where B.a <5;
explain select * from t3 where b in (select a from t0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 10
1 PRIMARY t3 ref b b 5 test.t0.a 1
2 SUBQUERY t0 ALL NULL NULL NULL NULL 10
set @save_ecp= @@engine_condition_pushdown;
......@@ -101,7 +101,7 @@ set max_heap_table_size= @save_max_heap_table_size;
explain select * from t1 where a in (select b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 5 func 1
2 SUBQUERY t2 index b b 5 NULL 10 Using index
select * from t1;
a b
......@@ -129,7 +129,7 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer
2 SUBQUERY it ALL NULL NULL NULL NULL 22
select
......@@ -163,7 +163,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 5 func 1
2 SUBQUERY it ALL NULL NULL NULL NULL 32
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
......@@ -197,7 +197,7 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer
2 SUBQUERY it ALL NULL NULL NULL NULL 22
select
......@@ -231,7 +231,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 5 func 1
2 SUBQUERY it ALL NULL NULL NULL NULL 52
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
......@@ -348,7 +348,7 @@ WHERE t1.Code IN (
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where
SELECT Name FROM t1
WHERE t1.Code IN (
......@@ -359,6 +359,10 @@ Canada
China
Czech Republic
drop table t1, t2;
drop procedure if exists p1;
drop procedure if exists p2;
drop procedure if exists p3;
drop procedure if exists p4;
CREATE TABLE t1(a INT);
CREATE TABLE t2(c INT);
CREATE PROCEDURE p1(v1 int)
......@@ -692,7 +696,7 @@ The following must use loose index scan over t3, key a:
explain select count(a) from t2 where a in ( SELECT a FROM t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index a a 5 NULL 1000 Using index
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 5 func 1
2 SUBQUERY t3 index a a 5 NULL 30000 Using index
select count(a) from t2 where a in ( SELECT a FROM t3);
count(a)
......
mysql-test/r/subselect_sj2_jcl6.result
View file @ 8e3aed8d
......@@ -36,7 +36,7 @@ a b
9 5
explain select * from t2 where b in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 3
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 3
1 PRIMARY t2 ref b b 5 test.t1.a 2 Using join buffer
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3
select * from t2 where b in (select a from t1);
......@@ -78,7 +78,7 @@ A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a
from t0 A, t0 B where B.a <5;
explain select * from t3 where b in (select a from t0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 10
1 PRIMARY t3 ref b b 5 test.t0.a 1 Using join buffer
2 SUBQUERY t0 ALL NULL NULL NULL NULL 10
set @save_ecp= @@engine_condition_pushdown;
......@@ -105,7 +105,7 @@ set max_heap_table_size= @save_max_heap_table_size;
explain select * from t1 where a in (select b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 5 func 1
2 SUBQUERY t2 index b b 5 NULL 10 Using index
select * from t1;
a b
......@@ -133,7 +133,7 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer
2 SUBQUERY it ALL NULL NULL NULL NULL 22
select
......@@ -167,7 +167,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 5 func 1
2 SUBQUERY it ALL NULL NULL NULL NULL 32
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
......@@ -201,7 +201,7 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY SUBQUERY#2 ALL unique_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer
2 SUBQUERY it ALL NULL NULL NULL NULL 22
select
......@@ -235,7 +235,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
from t2 ot where a in (select a from t1 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot ALL NULL NULL NULL NULL 22
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 5 func 1
2 SUBQUERY it ALL NULL NULL NULL NULL 52
select
a, mid(filler1, 1,10), length(filler1)=length(filler2)
......@@ -352,7 +352,7 @@ WHERE t1.Code IN (
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31
1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 3 func 1
2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where
SELECT Name FROM t1
WHERE t1.Code IN (
......@@ -363,6 +363,10 @@ Canada
China
Czech Republic
drop table t1, t2;
drop procedure if exists p1;
drop procedure if exists p2;
drop procedure if exists p3;
drop procedure if exists p4;
CREATE TABLE t1(a INT);
CREATE TABLE t2(c INT);
CREATE PROCEDURE p1(v1 int)
......@@ -698,7 +702,7 @@ The following must use loose index scan over t3, key a:
explain select count(a) from t2 where a in ( SELECT a FROM t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index a a 5 NULL 1000 Using index
1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 5 func 1
2 SUBQUERY t3 index a a 5 NULL 30000 Using index
select count(a) from t2 where a in ( SELECT a FROM t3);
count(a)
......
mysql-test/r/subselect_sj_jcl6.result
View file @ 8e3aed8d
......@@ -852,7 +852,7 @@ INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii','iiii','ffff','ffff','ffff','f
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY subselect2 eq_ref unique_key unique_key 13 func 1 1.00
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 13 func 1 1.00
2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using MRR
Warnings:
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`pk` > 0))
......@@ -1021,7 +1021,7 @@ FROM t1
WHERE `varchar_nokey` < 'n' XOR `pk` ) ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00
1 PRIMARY subselect2 eq_ref unique_key unique_key 8 func 1 1.00
1 PRIMARY SUBQUERY#2 eq_ref unique_key unique_key 8 func 1 1.00
2 SUBQUERY t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where
Warnings:
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key`) and ((`test`.`t1`.`varchar_nokey` < 'n') xor `test`.`t1`.`pk`))
......
mysql-test/r/view.result
View file @ 8e3aed8d
......@@ -303,7 +303,7 @@ a+1
explain select * from v1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2
2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using filesort
2 DERIVED t1 ALL NULL NULL NULL NULL 2 Using filesort
drop view v1;
drop table t1;
create table t1 (a int);
......
mysql-test/suite/parts/r/partition_alter3_innodb.result
View file @ 8e3aed8d
......@@ -141,7 +141,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 7 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -165,7 +165,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 5 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -190,7 +190,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 3 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -226,7 +226,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 3 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -248,7 +248,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 4 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -269,7 +269,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 4 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -289,7 +289,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 5 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -308,7 +308,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 7 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -326,7 +326,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 10 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -452,7 +452,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 7 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -476,7 +476,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 5 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -504,7 +504,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 3 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -538,7 +538,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 4 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -563,7 +563,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 3 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -587,7 +587,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 23 Using where
1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 10 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -610,7 +610,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 5 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -632,7 +632,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 7 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -653,7 +653,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 10 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......
mysql-test/suite/parts/r/partition_alter3_myisam.result
View file @ 8e3aed8d
......@@ -155,7 +155,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 7 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -187,7 +187,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 5 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -228,7 +228,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 3 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -278,7 +278,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 3 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -312,7 +312,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 4 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -343,7 +343,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 4 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -371,7 +371,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 5 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -396,7 +396,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 7 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -418,7 +418,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 10 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -552,7 +552,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 7 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -584,7 +584,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 5 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -628,7 +628,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 3 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -676,7 +676,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 4 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -713,7 +713,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 3 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -747,7 +747,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 10 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -778,7 +778,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 5 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -806,7 +806,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 7 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......@@ -831,7 +831,7 @@ t1.frm
t1.par
EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 10 Using where
# check read single success: 1
# check read all success: 1
# check read row by row success: 1
......
mysql-test/suite/pbxt/r/group_min_max.result
View file @ 8e3aed8d
......@@ -2256,7 +2256,8 @@ id select_type table type possible_keys key key_len ref rows Extra
EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE
a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1_outer index NULL a 10 NULL 15 Using where; Using index
1 PRIMARY SUBQUERY#2 ALL distinct_key NULL NULL NULL 15
1 PRIMARY t1_outer ref a a 5 SUBQUERY#2.max(b) 1 Using index
2 SUBQUERY t1 index NULL a 10 NULL 15 Using index
EXPLAIN SELECT 1 FROM t1 AS t1_outer GROUP BY a HAVING
a > (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
......
mysql-test/suite/pbxt/r/metadata.result
View file @ 8e3aed8d
......@@ -55,7 +55,7 @@ id data data
2 female no
select t1.id from t1 union select t2.id from t2;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def id id 1 4 1 Y 32768 0 63
def id id 1 4 1 Y 49152 0 63
id
1
2
......@@ -66,7 +66,7 @@ insert into t1 values (2,'two');
set @arg00=1 ;
select @arg00 FROM t1 where a=1 union distinct select 1 FROM t1 where a=1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def @arg00 @arg00 8 20 1 Y 32768 0 63
def @arg00 @arg00 8 20 1 Y 49152 0 63
@arg00
1
select * from (select @arg00) aaa;
......@@ -76,7 +76,7 @@ def aaa @arg00 @arg00 8 20 1 Y 32768 0 63
1
select 1 union select 1;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def 1 1 8 20 1 N 32769 0 63
def 1 1 8 20 1 N 49153 0 63
1
1
select * from (select 1 union select 1) aaa;
......
mysql-test/suite/pbxt/r/partition_hash.result
View file @ 8e3aed8d
......@@ -57,25 +57,25 @@ id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 9 Using where
explain partitions select * from t1 where a is null or (a >= 5 and a <= 7);
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p2,p3 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p0,p2,p3 ALL NULL NULL NULL NULL 7 Using where
explain partitions select * from t1 where a is null;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 3 Using where
explain partitions select * from t1 where a is not null;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 9 Using where
explain partitions select * from t1 where a >= 1 and a < 3;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 5 Using where
explain partitions select * from t1 where a >= 3 and a <= 5;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p1,p2 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p1,p2 ALL NULL NULL NULL NULL 4 Using where
explain partitions select * from t1 where a > 2 and a < 4;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p1 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p1 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a > 3 and a <= 6;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p2,p3 ALL NULL NULL NULL NULL 9 Using where
1 SIMPLE t1 p2,p3 ALL NULL NULL NULL NULL 4 Using where
explain partitions select * from t1 where a > 5;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 9 Using where
......
mysql-test/suite/pbxt/r/partition_range.result
View file @ 8e3aed8d
......@@ -21,19 +21,19 @@ select * from t1 where a > 1;
a
explain partitions select * from t1 where a is null;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 pnull ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a >= 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a < 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 pnull ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a <= 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull,p0 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 pnull,p0 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a > 1;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 0 Using where
drop table t1;
create table t1 (a int unsigned, b int unsigned)
partition by range (a)
......@@ -63,19 +63,19 @@ select * from t1 where a > 1;
a b
explain partitions select * from t1 where a is null;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 6 Using where
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a >= 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0_p0sp0,p0_p0sp1,p1_p1sp0,p1_p1sp1 ALL NULL NULL NULL NULL 6 Using where
1 SIMPLE t1 p0_p0sp0,p0_p0sp1,p1_p1sp0,p1_p1sp1 ALL NULL NULL NULL NULL 4 Using where
explain partitions select * from t1 where a < 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 6 Using where
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 2 Using where
explain partitions select * from t1 where a <= 0;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1,p0_p0sp0,p0_p0sp1 ALL NULL NULL NULL NULL 6 Using where
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1,p0_p0sp0,p0_p0sp1 ALL NULL NULL NULL NULL 4 Using where
explain partitions select * from t1 where a > 1;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 0 Using where
drop table t1;
CREATE TABLE t1 (
a int not null,
......
mysql-test/suite/pbxt/r/subselect.result
View file @ 8e3aed8d
......@@ -3420,18 +3420,20 @@ AAA 8
EXPLAIN
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 9 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 9
1 PRIMARY SUBQUERY#2 eq_ref distinct_key distinct_key 23 test.t1.a,test.t1.b 1
2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
ALTER TABLE t1 ADD INDEX(a);
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
a b
AAA 8
BBB 4
CCC 7
AAA 8
EXPLAIN
SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 9 Using where
1 PRIMARY SUBQUERY#2 ALL distinct_key NULL NULL NULL 9
1 PRIMARY t1 ref a a 8 SUBQUERY#2.a 1 Using where
2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
DROP TABLE t1;
create table t1( f1 int,f2 int);
......
mysql-test/t/subselect_mat.test
View file @ 8e3aed8d
......@@ -75,6 +75,7 @@ explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
select * from t1i where a1 in (select b1 from t2i where b1 > '0');
--replace_column 6 # 8 # 11 #
explain extended
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1);
......@@ -83,10 +84,12 @@ explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0');
--replace_column 6 # 7 # 8 # 11 #
explain extended
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2);
--replace_column 6 # 7 # 8 # 11 #
explain extended
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1);
......@@ -174,6 +177,7 @@ where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and
(a1, a2) in (select c1, c2 from t3
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
--replace_column 6 # 7 # 8 # 11 #
explain extended
select * from t1i
where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
......@@ -215,6 +219,7 @@ where (a1, a2) in (select b1, b2 from t2
# multiple levels of nesting subqueries, unions
--replace_column 6 # 7 # 8 # 11 #
explain extended
(select * from t1
where (a1, a2) in (select b1, b2 from t2
......@@ -829,8 +834,12 @@ select min(a1) from t1 where 7 in (select b1 from t2);
# This is the only correct result of all four queries. This difference is
# filed as BUG#40037.
set @@optimizer_switch='default,materialization=off';
-- echo # with MariaDB and MWL#90, this particular case is solved:
explain select min(a1) from t1 where 7 in (select b1 from t2);
select min(a1) from t1 where 7 in (select b1 from t2);
-- echo # but when we go around MWL#90 code, the problem still shows up:
explain select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4;
drop table t1,t2;
#
......
mysql-test/t/subselect_sj2.test
View file @ 8e3aed8d
......@@ -490,6 +490,12 @@ drop table t1, t2;
# Bug#33062: subquery in stored routine cause crash
#
--disable_warnings
drop procedure if exists p1;
drop procedure if exists p2;
drop procedure if exists p3;
drop procedure if exists p4;
--enable_warnings
CREATE TABLE t1(a INT);
CREATE TABLE t2(c INT);
......
sql/item_subselect.cc
View file @ 8e3aed8d
......@@ -190,10 +190,6 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref)
changed= 1;
inside_first_fix_fields= FALSE;
// all transformation is done (used by prepared statements)
changed= 1;
/*
Substitute the current item with an Item_in_optimizer that was
created by Item_in_subselect::select_in_like_transformer and
......@@ -217,13 +213,13 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref)
if (!(*ref)->fixed)
res= (*ref)->fix_fields(thd, ref);
goto end;
//psergey-merge: done_first_fix_fields= FALSE;
}
// Is it one field subselect?
if (engine->cols() > max_columns)
{
my_error(ER_OPERAND_COLUMNS, MYF(0), 1);
//psergey-merge: done_first_fix_fields= FALSE;
goto end;
}
fix_length_and_dec();
......@@ -241,6 +237,7 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref)
end:
done_first_fix_fields= FALSE;
inside_first_fix_fields= FALSE;
thd->where= save_where;
return res;
}
......@@ -468,6 +465,12 @@ bool Item_subselect::exec()
return (res);
}
int Item_subselect::optimize()
{
int res;
res= engine->optimize();
return res;
}
/*
Compute the IN predicate if the left operand's cache changed.
......@@ -724,9 +727,6 @@ Item_singlerow_subselect::select_transformer(JOIN *join)
void Item_singlerow_subselect::store(uint i, Item *item)
{
row[i]->store(item);
//psergey-merge: can do without that: row[i]->cache_value();
//psergey-backport-timours: ^ really, without that ^
//psergey-try-merge-again:
row[i]->cache_value();
}
......@@ -2088,7 +2088,7 @@ void Item_in_subselect::update_used_tables()
@retval FALSE an execution method was chosen successfully
*/
bool Item_in_subselect::setup_engine()
bool Item_in_subselect::setup_engine(bool dont_switch_arena)
{
subselect_hash_sj_engine *new_engine= NULL;
bool res= FALSE;
......@@ -2103,14 +2103,15 @@ bool Item_in_subselect::setup_engine()
old_engine= (subselect_single_select_engine*) engine;
if (arena->is_conventional())
if (arena->is_conventional() || dont_switch_arena)
arena= 0;
else
thd->set_n_backup_active_arena(arena, &backup);
if (!(new_engine= new subselect_hash_sj_engine(thd, this,
old_engine)) ||
new_engine->init_permanent(unit->get_unit_column_types()))
new_engine->init_permanent(unit->get_unit_column_types(),
old_engine->get_identifier()))
{
Item_subselect::trans_res trans_res;
/*
......@@ -3457,7 +3458,7 @@ subselect_hash_sj_engine::get_strategy_using_schema()
bitmap_set_bit(&partial_match_key_parts, i);
++count_partial_match_columns;
}
}
};
}
/* If no column contains NULLs use regular hash index lookups. */
......@@ -3656,6 +3657,7 @@ bitmap_init_memroot(MY_BITMAP *map, uint n_bits, MEM_ROOT *mem_root)
reexecution.
@param tmp_columns the items that produce the data for the temp table
@param subquery_id subquery's identifier (for temptable name)
@details
- Create a temporary table to store the result of the IN subquery. The
......@@ -3671,7 +3673,8 @@ bitmap_init_memroot(MY_BITMAP *map, uint n_bits, MEM_ROOT *mem_root)
@retval FALSE otherwise
*/
bool subselect_hash_sj_engine::init_permanent(List<Item> *tmp_columns)
bool subselect_hash_sj_engine::init_permanent(List<Item> *tmp_columns,
uint subquery_id)
{
/* Options to create_tmp_table. */
ulonglong tmp_create_options= thd->options | TMP_TABLE_ALL_COLUMNS;
......@@ -3706,12 +3709,19 @@ bool subselect_hash_sj_engine::init_permanent(List<Item> *tmp_columns)
DBUG_RETURN(TRUE);
}
*/
char buf[32];
uint len= my_snprintf(buf, sizeof(buf), "SUBQUERY#%d", subquery_id);
char *name;
if (!(name= (char*)thd->alloc(len + 1)))
DBUG_RETURN(TRUE);
memcpy(name, buf, len+1);
if (!(result= new select_materialize_with_stats))
DBUG_RETURN(TRUE);
if (((select_union*) result)->create_result_table(
thd, tmp_columns, TRUE, tmp_create_options,
"materialized subselect", TRUE))
name, TRUE))
DBUG_RETURN(TRUE);
tmp_table= ((select_union*) result)->table;
......@@ -3792,7 +3802,7 @@ bool subselect_hash_sj_engine::make_semi_join_conds()
if (!(tmp_table_ref= (TABLE_LIST*) thd->alloc(sizeof(TABLE_LIST))))
DBUG_RETURN(TRUE);
tmp_table_ref->init_one_table("", "materialized subselect", TL_READ);
tmp_table_ref->init_one_table("", tmp_table->alias, TL_READ);
tmp_table_ref->table= tmp_table;
context= new Name_resolution_context;
......@@ -3971,6 +3981,17 @@ void subselect_hash_sj_engine::cleanup()
}
int subselect_hash_sj_engine::optimize()
{
int res= 0;
SELECT_LEX *save_select= thd->lex->current_select;
thd->lex->current_select= materialize_join->select_lex;
res= materialize_join->optimize();
thd->lex->current_select= save_select;
return res;
}
/**
Execute a subquery IN predicate via materialization.
......
sql/item_subselect.h
View file @ 8e3aed8d
......@@ -46,15 +46,16 @@ class Item_subselect :public Item_result_field
< child_join->prepare
< engine->prepare
*ref= substitution;
substitution= NULL;
< Item_subselect::fix_fields
*/
Item *substitution;
public:
/* unit of subquery */
st_select_lex_unit *unit;
protected:
/* engine that perform execution of subselect (single select or union) */
subselect_engine *engine;
protected:
/* old engine if engine was changed */
subselect_engine *old_engine;
/* cache of used external tables */
......@@ -139,6 +140,7 @@ class Item_subselect :public Item_result_field
bool mark_as_dependent(THD *thd, st_select_lex *select, Item *item);
void fix_after_pullout(st_select_lex *new_parent, Item **ref);
void recalc_used_tables(st_select_lex *new_parent, bool after_pullout);
virtual int optimize();
virtual bool exec();
virtual void fix_length_and_dec();
table_map used_tables() const;
......@@ -333,7 +335,9 @@ class Item_in_subselect :public Item_exists_subselect
all JOIN in UNION
*/
Item *expr;
public:
Item_in_optimizer *optimizer;
protected:
bool was_null;
bool abort_on_null;
public:
......@@ -379,6 +383,23 @@ class Item_in_subselect :public Item_exists_subselect
};
enum_exec_method exec_method;
/*
JTBM: temporary measure to tell JTBM predicates from SJ predicates
psergey-jtbm-todo: can't we do without this?
- either remove it altogether
- or put into enum_exec_method
We can't remove it altogether as it is used to classify contents in
join->sj_subselects.
jtbm-todo: option 1: let sj_subselects list pairs.
*/
bool is_flattenable_semijoin;
/*
Cost to populate the temporary table (set on if-needed basis).
*/
//double startup_cost;
bool *get_cond_guard(int i)
{
return pushed_cond_guards ? pushed_cond_guards + i : NULL;
......@@ -428,7 +449,7 @@ class Item_in_subselect :public Item_exists_subselect
bool fix_fields(THD *thd, Item **ref);
void fix_after_pullout(st_select_lex *new_parent, Item **ref);
void update_used_tables();
bool setup_engine();
bool setup_engine(bool dont_switch_arena);
bool init_left_expr_cache();
/* Inform 'this' that it was computed, and contains a valid result. */
void set_first_execution() { if (first_execution) first_execution= FALSE; }
......@@ -502,6 +523,7 @@ class subselect_engine: public Sql_alloc
THD * get_thd() { return thd; }
virtual int prepare()= 0;
virtual void fix_length_and_dec(Item_cache** row)= 0;
virtual int optimize() { DBUG_ASSERT(0); return 0; }
/*
Execute the engine
......@@ -734,7 +756,7 @@ inline bool Item_subselect::is_uncacheable() const
class subselect_hash_sj_engine : public subselect_engine
{
protected:
public:
/* The table into which the subquery is materialized. */
TABLE *tmp_table;
/* TRUE if the subquery was materialized into a temp table. */
......@@ -746,14 +768,16 @@ class subselect_hash_sj_engine : public subselect_engine
of subselect_single_select_engine::[prepare | cols].
*/
subselect_single_select_engine *materialize_engine;
protected:
/* The engine used to compute the IN predicate. */
subselect_engine *lookup_engine;
/*
QEP to execute the subquery and materialize its result into a
temporary table. Created during the first call to exec().
*/
public:
JOIN *materialize_join;
protected:
/* Keyparts of the only non-NULL composite index in a rowid merge. */
MY_BITMAP non_null_key_parts;
/* Keyparts of the single column indexes with NULL, one keypart per index. */
......@@ -766,7 +790,9 @@ class subselect_hash_sj_engine : public subselect_engine
IN results because index lookups sometimes match values that are actually
not equal to the search key in SQL terms.
*/
public:
Item_cond_and *semi_join_conds;
protected:
/* Possible execution strategies that can be used to compute hash semi-join.*/
enum exec_strategy {
UNDEFINED,
......@@ -802,10 +828,11 @@ class subselect_hash_sj_engine : public subselect_engine
}
~subselect_hash_sj_engine();
bool init_permanent(List<Item> *tmp_columns);
bool init_permanent(List<Item> *tmp_columns, uint subquery_id);
bool init_runtime();
void cleanup();
int prepare() { return 0; } /* Override virtual function in base class. */
int optimize();
int exec();
virtual void print(String *str, enum_query_type query_type);
uint cols()
......
sql/opt_range.cc
View file @ 8e3aed8d
......@@ -2285,7 +2285,8 @@ int SQL_SELECT::test_quick_select(THD *thd, key_map keys_to_use,
quick=0;
needed_reg.clear_all();
quick_keys.clear_all();
if (keys_to_use.is_clear_all())
DBUG_ASSERT(!head->is_filled_at_execution());
if (keys_to_use.is_clear_all() || head->is_filled_at_execution())
DBUG_RETURN(0);
records= head->file->stats.records;
if (!records)
......
sql/opt_subselect.cc
View file @ 8e3aed8d
This diff is collapsed.
sql/opt_subselect.h
View file @ 8e3aed8d
/* */
/*
Semi-join subquery optimization code definitions
*/
#ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class implementation */
......@@ -365,4 +367,10 @@ int clear_sj_tmp_tables(JOIN *join);
int rewrite_to_index_subquery_engine(JOIN *join);
void get_delayed_table_estimates(TABLE *table,
ha_rows *out_rows,
double *scan_time,
double *startup_cost);
bool do_jtbm_materialization_if_needed(JOIN_TAB *tab);
sql/sql_base.cc
View file @ 8e3aed8d
......@@ -7661,6 +7661,17 @@ bool setup_tables(THD *thd, Name_resolution_context *context,
if (res)
DBUG_RETURN(1);
}
if (table_list->jtbm_subselect)
{
Item *item= table_list->jtbm_subselect;
if (item->fix_fields(thd, &item))
{
my_error(ER_TOO_MANY_TABLES,MYF(0),MAX_TABLES);
DBUG_RETURN(1);
}
DBUG_ASSERT(item == table_list->jtbm_subselect);
table_list->jtbm_subselect->setup_engine(FALSE);
}
}
/* Precompute and store the row types of NATURAL/USING joins. */
......
sql/sql_join_cache.cc
View file @ 8e3aed8d
......@@ -33,7 +33,6 @@
#define NO_MORE_RECORDS_IN_BUFFER (uint)(-1)
/*****************************************************************************
* Join cache module
******************************************************************************/
......@@ -1778,6 +1777,13 @@ enum_nested_loop_state JOIN_CACHE_BNL::join_matching_records(bool skip_last)
}
/* Start retrieving all records of the joined table */
if (do_jtbm_materialization_if_needed(join_tab))
{
rc= NESTED_LOOP_ERROR;
goto finish;
}
if ((error= join_init_read_record(join_tab)))
{
rc= error < 0 ? NESTED_LOOP_NO_MORE_ROWS: NESTED_LOOP_ERROR;
......
sql/sql_select.cc
View file @ 8e3aed8d
This diff is collapsed.
sql/sql_select.h
View file @ 8e3aed8d
......@@ -210,7 +210,10 @@ typedef struct st_join_table {
method (but not 'index' for some reason), i.e. this matches method which
E(#records) is in found_records.
*/
ha_rows read_time;
double read_time;
/* Startup cost for execution */
double startup_cost;
table_map dependent,key_dependent;
uint use_quick,index;
......@@ -1551,6 +1554,10 @@ class JOIN :public Sql_alloc
bool union_part; ///< this subselect is part of union
bool optimized; ///< flag to avoid double optimization in EXPLAIN
/*
Subqueries that will need to be converted to semi-join nests, including
those converted to jtbm nests. The list is emptied when conversion is done.
*/
Array<Item_in_subselect> sj_subselects;
/* Temporary tables used to weed-out semi-join duplicates */
......
sql/table.cc
View file @ 8e3aed8d
......@@ -5114,6 +5114,12 @@ bool st_table::is_children_attached(void)
(parent && parent->children_attached));
}
bool st_table::is_filled_at_execution()
{
return test(pos_in_table_list->jtbm_subselect);
}
/*
Cleanup this table for re-execution.
......
sql/table.h
View file @ 8e3aed8d
......@@ -914,6 +914,13 @@ struct st_table {
inline bool needs_reopen_or_name_lock()
{ return s->version != refresh_version; }
bool is_children_attached(void);
/*
If TRUE, the table is filled at execution phase (and so, the optimizer
should not do things like range analysis or constant table detection on
it).
*/
bool is_filled_at_execution();
};
enum enum_schema_table_state
......@@ -1131,7 +1138,7 @@ class Item_in_subselect;
1) table (TABLE_LIST::view == NULL)
- base table
(TABLE_LIST::derived == NULL)
- subquery - TABLE_LIST::table is a temp table
- FROM-clause subquery - TABLE_LIST::table is a temp table
(TABLE_LIST::derived != NULL)
- information schema table
(TABLE_LIST::schema_table != NULL)
......@@ -1150,6 +1157,8 @@ class Item_in_subselect;
(TABLE_LIST::natural_join != NULL)
- JOIN ... USING
(TABLE_LIST::join_using_fields != NULL)
- semi-join nest (sj_on_expr!= NULL && sj_subq_pred!=NULL)
4) jtbm semi-join (jtbm_subselect != NULL)
*/
class Index_hint;
......@@ -1193,7 +1202,13 @@ struct TABLE_LIST
table_map sj_inner_tables;
/* Number of IN-compared expressions */
uint sj_in_exprs;
/* If this is a non-jtbm semi-join nest: corresponding subselect predicate */
Item_in_subselect *sj_subq_pred;
/* If this is a jtbm semi-join object: corresponding subselect predicate */
Item_in_subselect *jtbm_subselect;
SJ_MATERIALIZATION_INFO *sj_mat_info;
/*
......
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