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BUG#727667 Wrong result with OR + NOT NULL in maria-5.3

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- put the code that sets HA_NULL_PART bit back
- Fix test_if_ref/part_of_refkey() so that 
  = NULL-ability of lookup columns does not prevent the equality 
    from being removed (we now have early/late NULLs filtering which 
    will filter out NULL values)
  = equality is not removed if it is ref_or_null access, and the value 
    of the lookup column can alternate between the lookup value and NULL.
This commit is contained in:
Sergey Petrunya
2011-03-05 12:56:22 +03:00
parent e59d560394
commit 76165dc760
11 changed files with 106 additions and 22 deletions
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26
mysql-test/r/null_key.result
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@@ -21,10 +21,10 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a,b a 9 NULL 3 Using where; Using index
explain select * from t1 where (a is null or a = 7) and b=7;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref_or_null a,b a 9 const,const 2 Using index
1 SIMPLE t1 ref_or_null a,b a 9 const,const 2 Using where; Using index
explain select * from t1 where (a is null or a = 7) and b=7 order by a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref_or_null a,b a 9 const,const 2 Using index; Using filesort
1 SIMPLE t1 ref_or_null a,b a 9 const,const 2 Using where; Using index; Using filesort
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a,b a 5 const 3 Using where; Using index
@@ -151,7 +151,7 @@ alter table t1 modify b int null;
insert into t1 values (7,null), (8,null), (8,7);
explain select * from t1 where a = 7 and (b=7 or b is null);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref_or_null a,b a 10 const,const 2 Using index
1 SIMPLE t1 ref_or_null a,b a 10 const,const 2 Using where; Using index
select * from t1 where a = 7 and (b=7 or b is null);
a b
7 7
@@ -166,7 +166,7 @@ a b
NULL 7
explain select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref_or_null a a 5 const 5 Using index
1 SIMPLE t1 ref_or_null a a 5 const 5 Using where; Using index
select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
a b
7 NULL
@@ -192,7 +192,7 @@ a a b
explain select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t1 ref_or_null a a 10 test.t2.a,const 4 Using index
1 SIMPLE t1 ref_or_null a a 10 test.t2.a,const 4 Using where; Using index
select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
a a b
7 7 7
@@ -202,7 +202,7 @@ a a b
explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 2
1 SIMPLE t1 ref_or_null a a 10 test.t2.a,const 4 Using index
1 SIMPLE t1 ref_or_null a a 10 test.t2.a,const 4 Using where; Using index
select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
a a b
7 7 7
@@ -226,7 +226,7 @@ delete from t1 where a=8;
explain select * from t2,t1 where t1.a=t2.a or t1.a is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 4
1 SIMPLE t1 ref_or_null a a 5 test.t2.a 4 Using index
1 SIMPLE t1 ref_or_null a a 5 test.t2.a 4 Using where; Using index
explain select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 4
@@ -447,3 +447,15 @@ a b a b
3 12 0 12
drop table t1, t2;
End of 5.0 tests
#
# BUG#727667 Wrong result with OR + NOT NULL in maria-5.3
#
CREATE TABLE t1 (
f3 int(11),
f10 varchar(1),
KEY (f3)
);
INSERT INTO t1 VALUES ('9','k'),(NULL,'r');
SELECT * FROM t1 WHERE (f3 = 83) OR (f10 = 'z' AND f3 IS NULL);
f3 f10
DROP TABLE t1;