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Fixed bug mdev-4274.

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This bug was the result of incompleteness of the patch for bug mdev-4177.
When an OR condition is simplified to a single conjunct it is merged
into the embedding AND condition. Multiple equalities are also merged,
and any field item involved in those equality should acquire a pointer
to a the multiple equality formed by this merge.
This commit is contained in:
Igor Babaev
2013-04-29 20:31:40 -07:00
parent ea4a417a8d
commit 86f43c3077
6 changed files with 161 additions and 2 deletions
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35
mysql-test/r/select.result
View File

@ -5049,6 +5049,7 @@ SELECT 1 FROM t1 GROUP BY 1;
1
1
drop table t1;
set sql_buffer_result= 0;
End of 5.1 tests
#
# BUG#776274: substitution of a single row table
@ -5132,4 +5133,38 @@ AND Time_zone_id = Time_zone_id
OR Time_zone_id <> Time_zone_id )
AND Use_leap_seconds <> 'N';
Time_zone_id Use_leap_seconds
#
# Bug mdev-4274: result of simplification of OR badly merged
# into embedding AND
#
CREATE TABLE t1 (a int, b int, INDEX idx(b)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8,8);
CREATE TABLE t2 (c int, INDEX idx(c)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8), (9);
EXPLAIN EXTENDED
SELECT * FROM t1 INNER JOIN t2 ON ( c = a )
WHERE 1 IS NULL OR b < 33 AND b = c;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 system idx NULL NULL NULL 1 100.00
1 SIMPLE t2 ref idx idx 5 const 1 100.00 Using index
Warnings:
Note 1003 select 8 AS `a`,8 AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`c` = 8) and (8 < 33))
SELECT * FROM t1 INNER JOIN t2 ON ( c = a )
WHERE 1 IS NULL OR b < 33 AND b = c;
a b c
8 8 8
DROP TABLE t1,t2;
#
# Bug mdev-4413: another manifestations of bug mdev-2474
# (valgrind complains)
#
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (7,1);
CREATE TABLE t2 (c int) ENGINE=MyISAM;
INSERT INTO t2 VALUES (0), (8);
SELECT * FROM t1, t2
WHERE c = a AND
( 0 OR ( b BETWEEN 45 AND 300 OR a > 45 AND a < 100 ) AND b = c );
a b c
DROP TABLE t1, t2;
End of 5.3 tests

35
mysql-test/r/select_jcl6.result
View File

@ -5060,6 +5060,7 @@ SELECT 1 FROM t1 GROUP BY 1;
1
1
drop table t1;
set sql_buffer_result= 0;
End of 5.1 tests
#
# BUG#776274: substitution of a single row table
@ -5143,6 +5144,40 @@ AND Time_zone_id = Time_zone_id
OR Time_zone_id <> Time_zone_id )
AND Use_leap_seconds <> 'N';
Time_zone_id Use_leap_seconds
#
# Bug mdev-4274: result of simplification of OR badly merged
# into embedding AND
#
CREATE TABLE t1 (a int, b int, INDEX idx(b)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8,8);
CREATE TABLE t2 (c int, INDEX idx(c)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8), (9);
EXPLAIN EXTENDED
SELECT * FROM t1 INNER JOIN t2 ON ( c = a )
WHERE 1 IS NULL OR b < 33 AND b = c;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 system idx NULL NULL NULL 1 100.00
1 SIMPLE t2 ref idx idx 5 const 1 100.00 Using index
Warnings:
Note 1003 select 8 AS `a`,8 AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`c` = 8) and (8 < 33))
SELECT * FROM t1 INNER JOIN t2 ON ( c = a )
WHERE 1 IS NULL OR b < 33 AND b = c;
a b c
8 8 8
DROP TABLE t1,t2;
#
# Bug mdev-4413: another manifestations of bug mdev-2474
# (valgrind complains)
#
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (7,1);
CREATE TABLE t2 (c int) ENGINE=MyISAM;
INSERT INTO t2 VALUES (0), (8);
SELECT * FROM t1, t2
WHERE c = a AND
( 0 OR ( b BETWEEN 45 AND 300 OR a > 45 AND a < 100 ) AND b = c );
a b c
DROP TABLE t1, t2;
End of 5.3 tests
set join_cache_level=default;
show variables like 'join_cache_level';

35
mysql-test/r/select_pkeycache.result
View File

@ -5049,6 +5049,7 @@ SELECT 1 FROM t1 GROUP BY 1;
1
1
drop table t1;
set sql_buffer_result= 0;
End of 5.1 tests
#
# BUG#776274: substitution of a single row table
@ -5132,4 +5133,38 @@ AND Time_zone_id = Time_zone_id
OR Time_zone_id <> Time_zone_id )
AND Use_leap_seconds <> 'N';
Time_zone_id Use_leap_seconds
#
# Bug mdev-4274: result of simplification of OR badly merged
# into embedding AND
#
CREATE TABLE t1 (a int, b int, INDEX idx(b)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8,8);
CREATE TABLE t2 (c int, INDEX idx(c)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8), (9);
EXPLAIN EXTENDED
SELECT * FROM t1 INNER JOIN t2 ON ( c = a )
WHERE 1 IS NULL OR b < 33 AND b = c;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 system idx NULL NULL NULL 1 100.00
1 SIMPLE t2 ref idx idx 5 const 1 100.00 Using index
Warnings:
Note 1003 select 8 AS `a`,8 AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`c` = 8) and (8 < 33))
SELECT * FROM t1 INNER JOIN t2 ON ( c = a )
WHERE 1 IS NULL OR b < 33 AND b = c;
a b c
8 8 8
DROP TABLE t1,t2;
#
# Bug mdev-4413: another manifestations of bug mdev-2474
# (valgrind complains)
#
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (7,1);
CREATE TABLE t2 (c int) ENGINE=MyISAM;
INSERT INTO t2 VALUES (0), (8);
SELECT * FROM t1, t2
WHERE c = a AND
( 0 OR ( b BETWEEN 45 AND 300 OR a > 45 AND a < 100 ) AND b = c );
a b c
DROP TABLE t1, t2;
End of 5.3 tests

2
mysql-test/r/subselect_sj2_mat.result
View File

@ -1380,7 +1380,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 100.00 Using where
2 MATERIALIZED t3 hash_ALL NULL #hash#$hj 5 test.t2.i2 3 100.00 Using where; Using join buffer (flat, BNLH join)
Warnings:
Note 1003 select `test`.`t1`.`i1` AS `i1` from `test`.`t1` semi join (`test`.`t2` join `test`.`t3`) where ((`test`.`t3`.`i3` = `test`.`t2`.`i2`) and (`test`.`t1`.`i1` = `test`.`t2`.`i2`) and (`test`.`t3`.`i3` > 0))
Note 1003 select `test`.`t1`.`i1` AS `i1` from `test`.`t1` semi join (`test`.`t2` join `test`.`t3`) where ((`test`.`t3`.`i3` = `test`.`t2`.`i2`) and (`test`.`t1`.`i1` = `test`.`t2`.`i2`) and (`test`.`t2`.`i2` > 0))
SELECT * FROM t1
WHERE i1 IN (SELECT i3 FROM t2, t3 WHERE i3 > 0 AND i3 = i2 OR 1=2);
i1

37
mysql-test/t/select.test
View File

@ -4241,6 +4241,7 @@ SELECT f1 FROM t1 GROUP BY 1;
SELECT f1 FROM t1 GROUP BY '123' = 'abc';
SELECT 1 FROM t1 GROUP BY 1;
drop table t1;
set sql_buffer_result= 0;
--echo End of 5.1 tests
@ -4305,4 +4306,40 @@ WHERE ( NOT (Use_leap_seconds <= Use_leap_seconds AND Time_zone_id != 1)
OR Time_zone_id <> Time_zone_id )
AND Use_leap_seconds <> 'N';
--echo #
--echo # Bug mdev-4274: result of simplification of OR badly merged
--echo # into embedding AND
--echo #
CREATE TABLE t1 (a int, b int, INDEX idx(b)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8,8);
CREATE TABLE t2 (c int, INDEX idx(c)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8), (9);
EXPLAIN EXTENDED
SELECT * FROM t1 INNER JOIN t2 ON ( c = a )
WHERE 1 IS NULL OR b < 33 AND b = c;
SELECT * FROM t1 INNER JOIN t2 ON ( c = a )
WHERE 1 IS NULL OR b < 33 AND b = c;
DROP TABLE t1,t2;
--echo #
--echo # Bug mdev-4413: another manifestations of bug mdev-2474
--echo # (valgrind complains)
--echo #
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (7,1);
CREATE TABLE t2 (c int) ENGINE=MyISAM;
INSERT INTO t2 VALUES (0), (8);
SELECT * FROM t1, t2
WHERE c = a AND
( 0 OR ( b BETWEEN 45 AND 300 OR a > 45 AND a < 100 ) AND b = c );
DROP TABLE t1, t2;
--echo End of 5.3 tests

19
sql/sql_select.cc
View File

@ -13195,7 +13195,24 @@ remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value)
if (new_item_and_list->is_empty())
li.remove();
else
li.replace(*new_item_and_list);
{
Item *list_item;
Item *new_list_item;
List_iterator<Item> it(*new_item_and_list);
while ((list_item= it++))
{
uchar* is_subst_valid= (uchar *) Item::ANY_SUBST;
new_list_item=
list_item->compile(&Item::subst_argument_checker,
&is_subst_valid,
&Item::equal_fields_propagator,
(uchar *) &cond_and->cond_equal);
if (new_list_item != list_item)
it.replace(new_list_item);
new_list_item->update_used_tables();
}
li.replace(*new_item_and_list);
}
cond_and_list->concat((List<Item>*) cond_equal_items);
}
else if (new_item->type() == Item::FUNC_ITEM &&