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Merge of the mwl106 tree into the latest 5.3 tree.
Resolved conflicts. Adjusted some test results
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@ -57,9 +57,8 @@ a b a b
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3 c 3 c
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explain select * from t1 as x1, (select * from t1) as x2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY x1 ALL NULL NULL NULL NULL 4
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 Using join buffer
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2 DERIVED t1 ALL NULL NULL NULL NULL 4
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1 SIMPLE x1 ALL NULL NULL NULL NULL 4
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1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using join buffer
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drop table if exists t2,t3;
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select * from (select 1) as a;
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1
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@ -91,7 +90,7 @@ a b
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2 b
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explain select * from (select * from t1 union select * from t1) a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 8
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2 DERIVED t1 ALL NULL NULL NULL NULL 4
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3 UNION t1 ALL NULL NULL NULL NULL 4
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NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
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@ -113,9 +112,8 @@ a b
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3 c
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explain select * from (select t1.*, t2.a as t2a from t1,t2 where t1.a=t2.a) t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> system NULL NULL NULL NULL 1
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2 DERIVED t2 system NULL NULL NULL NULL 1
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2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using where
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1 SIMPLE t2 system NULL NULL NULL NULL 1
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1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where
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drop table t1, t2;
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create table t1(a int not null, t char(8), index(a));
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SELECT * FROM (SELECT * FROM t1) as b ORDER BY a ASC LIMIT 0,20;
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@ -142,8 +140,7 @@ a t
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20 20
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explain select count(*) from t1 as tt1, (select * from t1) as tt2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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2 DERIVED t1 ALL NULL NULL NULL NULL 10000
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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drop table t1;
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SELECT * FROM (SELECT (SELECT * FROM (SELECT 1 as a) as a )) as b;
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(SELECT * FROM (SELECT 1 as a) as a )
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@ -172,30 +169,30 @@ insert into t1 values (NULL, 'a', 1), (NULL, 'b', 2), (NULL, 'c', 3), (NULL, 'd'
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insert into t2 values (1, 100), (1, 101), (1, 102), (2, 100), (2, 103), (2, 104), (3, 101), (3, 102), (3, 105);
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SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
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pla_id mat_id
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100 1
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101 1
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102 1
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103 2
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101 1
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100 1
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104 2
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103 2
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105 3
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SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
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pla_id test
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100 1
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101 1
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102 1
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103 2
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101 1
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100 1
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104 2
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103 2
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105 3
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explain SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY m2 ALL NULL NULL NULL NULL 9
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer
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1 PRIMARY <derived2> ref key0 key0 7 test.m2.matintnum 2
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2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
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2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1
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explain SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY m2 ALL NULL NULL NULL NULL 9
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer
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1 PRIMARY <derived2> ref key0 key0 7 test.m2.matintnum 2
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2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
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2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1
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drop table t1,t2;
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@ -230,9 +227,8 @@ count(*)
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2
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explain select count(*) from t1 INNER JOIN (SELECT A.E1, A.E2, A.E3 FROM t1 AS A WHERE A.E3 = (SELECT MAX(B.E3) FROM t1 AS B WHERE A.E2 = B.E2)) AS THEMAX ON t1.E1 = THEMAX.E2 AND t1.E1 = t1.E2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2
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1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 THEMAX.E2 1 Using where
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2 DERIVED A ALL NULL NULL NULL NULL 2 Using where
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1 SIMPLE A ALL NULL NULL NULL NULL 2 Using where
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1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.A.E2 1 Using where
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3 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 2 Using where
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drop table t1;
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create table t1 (a int);
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@ -245,8 +241,8 @@ a a
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2 2
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explain select * from ( select * from t1 union select * from t1) a,(select * from t1 union select * from t1) b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2
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1 PRIMARY <derived4> ALL NULL NULL NULL NULL 2 Using join buffer
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4
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1 PRIMARY <derived4> ALL NULL NULL NULL NULL 4 Using join buffer
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4 DERIVED t1 ALL NULL NULL NULL NULL 2
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5 UNION t1 ALL NULL NULL NULL NULL 2
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NULL UNION RESULT <union4,5> ALL NULL NULL NULL NULL NULL
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@ -311,7 +307,7 @@ a 7.0000
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b 3.5000
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explain SELECT s.name, AVG(s.val) AS median FROM (SELECT x.name, x.val FROM t1 x, t1 y WHERE x.name=y.name GROUP BY x.name, x.val HAVING SUM(y.val <= x.val) >= COUNT(*)/2 AND SUM(y.val >= x.val) >= COUNT(*)/2) AS s GROUP BY s.name;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using temporary; Using filesort
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 289 Using temporary; Using filesort
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2 DERIVED x ALL NULL NULL NULL NULL 17 Using temporary; Using filesort
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2 DERIVED y ALL NULL NULL NULL NULL 17 Using where; Using join buffer
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drop table t1;
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@ -322,8 +318,7 @@ id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index
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explain select a from (select a from t2 where a>1) tt;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> system NULL NULL NULL NULL 1
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2 DERIVED t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index
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1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index
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drop table t2;
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CREATE TABLE `t1` ( `itemid` int(11) NOT NULL default '0', `grpid` varchar(15) NOT NULL default '', `vendor` int(11) NOT NULL default '0', `date_` date NOT NULL default '0000-00-00', `price` decimal(12,2) NOT NULL default '0.00', PRIMARY KEY (`itemid`,`grpid`,`vendor`,`date_`), KEY `itemid` (`itemid`,`vendor`), KEY `itemid_2` (`itemid`,`date_`));
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insert into t1 values (128, 'rozn', 2, curdate(), 10),
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