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BUG#20420: optimizer reports wrong keys on left join with IN

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When checking if an IN predicate can be evaluated using a key
 the optimizer makes sure that all the arguments of IN are of
 the same result type. To assure that it check whether 
 Item_func_in::array is filled in. 
 However Item_func_in::array is set if the types are
 the same AND all the arguments are compile time constants.
 Fixed by introducing Item_func_in::arg_types_compatible
 flag to allow correct checking of the desired condition.
This commit is contained in:
gkodinov/kgeorge@macbook.gmz
2007-02-16 13:56:06 +02:00
parent 7fd3cd9e41
commit 138e9c403e
5 changed files with 101 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
mysql-test/r/func_in.result
View File

@ -351,6 +351,50 @@ some_id
1
2
drop table t1;
CREATE TABLE t1 (a int, b int, PRIMARY KEY (a));
INSERT INTO t1 VALUES (1,1),(2,1),(3,1),(4,1),(5,1),(6,1);
CREATE TABLE t2 (a int, b int, PRIMARY KEY (a));
INSERT INTO t2 VALUES (3,2),(4,2),(100,100),(101,201),(102,102);
CREATE TABLE t3 (a int PRIMARY KEY);
INSERT INTO t3 VALUES (1),(2),(3),(4);
CREATE TABLE t4 (a int PRIMARY KEY,b int);
INSERT INTO t4 VALUES (1,1),(2,2),(1000,1000),(1001,1001),(1002,1002),
(1003,1003),(1004,1004);
EXPLAIN SELECT STRAIGHT_JOIN * FROM t3
JOIN t1 ON t3.a=t1.a
JOIN t2 ON t3.a=t2.a
JOIN t4 WHERE t4.a IN (t1.b, t2.b);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 index PRIMARY PRIMARY 4 NULL 4 Using index
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t3.a 1
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t3.a 1
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 7 Range checked for each record (index map: 0x1)
SELECT STRAIGHT_JOIN * FROM t3
JOIN t1 ON t3.a=t1.a
JOIN t2 ON t3.a=t2.a
JOIN t4 WHERE t4.a IN (t1.b, t2.b);
a a b a b a b
3 3 1 3 2 1 1
3 3 1 3 2 2 2
4 4 1 4 2 1 1
4 4 1 4 2 2 2
EXPLAIN SELECT STRAIGHT_JOIN
(SELECT SUM(t4.a) FROM t4 WHERE t4.a IN (t1.b, t2.b))
FROM t3, t1, t2
WHERE t3.a=t1.a AND t3.a=t2.a;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 index PRIMARY PRIMARY 4 NULL 4 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t3.a 1
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t3.a 1
2 DEPENDENT SUBQUERY t4 index NULL PRIMARY 4 NULL 7 Using where; Using index
SELECT STRAIGHT_JOIN
(SELECT SUM(t4.a) FROM t4 WHERE t4.a IN (t1.b, t2.b))
FROM t3, t1, t2
WHERE t3.a=t1.a AND t3.a=t2.a;
(SELECT SUM(t4.a) FROM t4 WHERE t4.a IN (t1.b, t2.b))
3
3
DROP TABLE t1,t2,t3,t4;
End of 5.0 tests
create table t1(f1 char(1));
insert into t1 values ('a'),('b'),('1');

71
mysql-test/t/func_in.test
View File

@ -254,44 +254,43 @@ select some_id from t1 where some_id not in(-4,-1,-4);
select some_id from t1 where some_id not in(-4,-1,3423534,2342342);
drop table t1;
# TODO:Disabled until re-resolution of bug #20420 for 5.1.
# Results must be the same as in 5.0
##
## BUG#20420: optimizer reports wrong keys on left join with IN
##
#CREATE TABLE t1 (a int, b int, PRIMARY KEY (a));
#INSERT INTO t1 VALUES (1,1),(2,1),(3,1),(4,1),(5,1),(6,1);
#
#CREATE TABLE t2 (a int, b int, PRIMARY KEY (a));
#INSERT INTO t2 VALUES (3,2),(4,2),(100,100),(101,201),(102,102);
# BUG#20420: optimizer reports wrong keys on left join with IN
#
#CREATE TABLE t3 (a int PRIMARY KEY);
#INSERT INTO t3 VALUES (1),(2),(3),(4);
#
#CREATE TABLE t4 (a int PRIMARY KEY,b int);
#INSERT INTO t4 VALUES (1,1),(2,2),(1000,1000),(1001,1001),(1002,1002),(1003,1003),(1004,1004);
#
#EXPLAIN SELECT STRAIGHT_JOIN * FROM t3
# JOIN t1 ON t3.a=t1.a
# JOIN t2 ON t3.a=t2.a
# JOIN t4 WHERE t4.a IN (t1.b, t2.b);
#
#SELECT STRAIGHT_JOIN * FROM t3
# JOIN t1 ON t3.a=t1.a
# JOIN t2 ON t3.a=t2.a
# JOIN t4 WHERE t4.a IN (t1.b, t2.b);
#
#EXPLAIN SELECT STRAIGHT_JOIN
# (SELECT SUM(t4.a) FROM t4 WHERE t4.a IN (t1.b, t2.b))
# FROM t3, t1, t2
# WHERE t3.a=t1.a AND t3.a=t2.a;
#
#SELECT STRAIGHT_JOIN
# (SELECT SUM(t4.a) FROM t4 WHERE t4.a IN (t1.b, t2.b))
# FROM t3, t1, t2
# WHERE t3.a=t1.a AND t3.a=t2.a;
#
#DROP TABLE t1,t2,t3,t4;
CREATE TABLE t1 (a int, b int, PRIMARY KEY (a));
INSERT INTO t1 VALUES (1,1),(2,1),(3,1),(4,1),(5,1),(6,1);
CREATE TABLE t2 (a int, b int, PRIMARY KEY (a));
INSERT INTO t2 VALUES (3,2),(4,2),(100,100),(101,201),(102,102);
CREATE TABLE t3 (a int PRIMARY KEY);
INSERT INTO t3 VALUES (1),(2),(3),(4);
CREATE TABLE t4 (a int PRIMARY KEY,b int);
INSERT INTO t4 VALUES (1,1),(2,2),(1000,1000),(1001,1001),(1002,1002),
(1003,1003),(1004,1004);
EXPLAIN SELECT STRAIGHT_JOIN * FROM t3
JOIN t1 ON t3.a=t1.a
JOIN t2 ON t3.a=t2.a
JOIN t4 WHERE t4.a IN (t1.b, t2.b);
SELECT STRAIGHT_JOIN * FROM t3
JOIN t1 ON t3.a=t1.a
JOIN t2 ON t3.a=t2.a
JOIN t4 WHERE t4.a IN (t1.b, t2.b);
EXPLAIN SELECT STRAIGHT_JOIN
(SELECT SUM(t4.a) FROM t4 WHERE t4.a IN (t1.b, t2.b))
FROM t3, t1, t2
WHERE t3.a=t1.a AND t3.a=t2.a;
SELECT STRAIGHT_JOIN
(SELECT SUM(t4.a) FROM t4 WHERE t4.a IN (t1.b, t2.b))
FROM t3, t1, t2
WHERE t3.a=t1.a AND t3.a=t2.a;
DROP TABLE t1,t2,t3,t4;
--echo End of 5.0 tests