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Merge.

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This commit is contained in:
Igor Babaev
2010-10-30 06:07:45 -07:00
parent d48a8b6034 05092b7323
commit 0b72fd88a1
108 changed files with 7091 additions and 3170 deletions
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46
mysql-test/r/join.result
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@@ -404,7 +404,7 @@ SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e
ORDER BY t1.b, t1.c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 32 Using temporary; Using filesort
1 SIMPLE t2 ALL NULL NULL NULL NULL 16 Using where; Using join buffer
1 SIMPLE t2 ALL NULL NULL NULL NULL 16 Using where; Using join buffer (flat, BNL join)
SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e
ORDER BY t1.b, t1.c;
e
@@ -846,7 +846,7 @@ select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b;
a b a a
explain select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 4
1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index
We expect rnd_next=5, and read_key must be 0 because of short-cutting:
@@ -889,8 +889,8 @@ Z
vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv
explain select * from t1, t2 A, t2 B where A.a = t1.a and B.a=A.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
1 SIMPLE A eq_ref PRIMARY PRIMARY 4 test.t1.a 1
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where
1 SIMPLE A eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where
1 SIMPLE B eq_ref PRIMARY PRIMARY 4 test.A.b 1
show status like '%cost%';
Variable_name Value
@@ -910,7 +910,7 @@ INSERT INTO t1 SELECT a + 64, b FROM t1;
INSERT INTO t2 SELECT a, b FROM t1;
EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a LIMIT 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 2
1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 Using where
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1
EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a LIMIT 2;
id select_type table type possible_keys key key_len ref rows Extra
@@ -924,7 +924,7 @@ a b c d
2 NULL 2 NULL
EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 128 Using filesort
1 SIMPLE t1 ALL NULL NULL NULL NULL 128 Using where; Using filesort
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1
EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a;
id select_type table type possible_keys key key_len ref rows Extra
@@ -1095,11 +1095,11 @@ ON t4.a = t5.a
ON t1.a = t3.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t3 ref a a 5 test.t1.a 2 Using index
1 SIMPLE t3 ref a a 5 test.t1.a 2 Using where; Using index
1 SIMPLE t4 ALL NULL NULL NULL NULL 0 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 0 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 0 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer
1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
SELECT *
FROM
t1 JOIN t2 ON t1.a = t2.a
@@ -1220,4 +1220,34 @@ f1
2
DEALLOCATE PREPARE stmt;
DROP TABLE t1;
#
# BUG#47217 Lost optimization caused slowdown & wrong result.
#
CREATE TABLE t1 (pk INT, v VARCHAR(2), PRIMARY KEY(pk));
CREATE INDEX ix1 ON t1(v);
CREATE TABLE t2 (pk INT, v VARCHAR(2), PRIMARY KEY(pk));
CREATE INDEX ix2 ON t2(v);
INSERT INTO t1 VALUES (1,'a'),(2,NULL);
INSERT INTO t2 VALUES (1,NULL);
EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v ORDER BY 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
INSERT INTO t1 VALUES (3,'b'),(4,NULL),(5,'c'),(6,'cc'),(7,'d'),
(8,'dd'),(9,'e'),(10,'ee');
INSERT INTO t2 VALUES (2,NULL);
FLUSH STATUS;
SELECT * FROM t1 JOIN t2 ON t1.v = t2.v WHERE t2.v IS NULL ORDER BY 1;
pk v pk v
SHOW STATUS LIKE 'Handler_read_%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 1
DROP TABLE t1, t2;
End of 5.1 tests