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Fixed bug lp:825051

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The cause of the wrong result was that Item_ref_null_helper::get_date()
didn't use a method of the *_result() family, and fetched the data
for the field from the current row instead of result_field. Changed to
use the correct *_result() method, like to all other similar methods
of Item_ref_null_helper.
This commit is contained in:
unknown
2011-11-29 23:06:39 +02:00
parent cdde6187d1
commit 625cdb8078
7 changed files with 147 additions and 1 deletions
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26
mysql-test/r/subselect.result
View File

@@ -5827,5 +5827,31 @@ SELECT (SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0);
(SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0)
NULL
drop tables t1,t2,t3;
#
# LP BUG#825051 Wrong result with date/datetime and subquery with GROUP BY and in_to_exists
#
CREATE TABLE t1 (a date, KEY (a)) ;
INSERT INTO t1 VALUES ('2009-01-01'),('2009-02-02');
set @old_optimizer_switch = @@optimizer_switch;
SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 DEPENDENT SUBQUERY t1 index NULL a 4 NULL 1 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
SET @@optimizer_switch='semijoin=off,materialization=on,in_to_exists=off,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 SUBQUERY t1 index NULL a 4 NULL 2 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
set @@optimizer_switch=@old_optimizer_switch;
drop table t1;
# return optimizer switch changed in the beginning of this test
set optimizer_switch=@subselect_tmp;

26
mysql-test/r/subselect_no_mat.result
View File

@@ -5826,6 +5826,32 @@ SELECT (SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0);
(SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0)
NULL
drop tables t1,t2,t3;
#
# LP BUG#825051 Wrong result with date/datetime and subquery with GROUP BY and in_to_exists
#
CREATE TABLE t1 (a date, KEY (a)) ;
INSERT INTO t1 VALUES ('2009-01-01'),('2009-02-02');
set @old_optimizer_switch = @@optimizer_switch;
SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 DEPENDENT SUBQUERY t1 index NULL a 4 NULL 1 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
SET @@optimizer_switch='semijoin=off,materialization=on,in_to_exists=off,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 SUBQUERY t1 index NULL a 4 NULL 2 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
set @@optimizer_switch=@old_optimizer_switch;
drop table t1;
# return optimizer switch changed in the beginning of this test
set optimizer_switch=@subselect_tmp;
set optimizer_switch=default;

26
mysql-test/r/subselect_no_opts.result
View File

@@ -5822,6 +5822,32 @@ SELECT (SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0);
(SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0)
NULL
drop tables t1,t2,t3;
#
# LP BUG#825051 Wrong result with date/datetime and subquery with GROUP BY and in_to_exists
#
CREATE TABLE t1 (a date, KEY (a)) ;
INSERT INTO t1 VALUES ('2009-01-01'),('2009-02-02');
set @old_optimizer_switch = @@optimizer_switch;
SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 DEPENDENT SUBQUERY t1 index NULL a 4 NULL 1 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
SET @@optimizer_switch='semijoin=off,materialization=on,in_to_exists=off,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 SUBQUERY t1 index NULL a 4 NULL 2 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
set @@optimizer_switch=@old_optimizer_switch;
drop table t1;
# return optimizer switch changed in the beginning of this test
set optimizer_switch=@subselect_tmp;
set @optimizer_switch_for_subselect_test=null;

26
mysql-test/r/subselect_no_scache.result
View File

@@ -5831,6 +5831,32 @@ SELECT (SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0);
(SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0)
NULL
drop tables t1,t2,t3;
#
# LP BUG#825051 Wrong result with date/datetime and subquery with GROUP BY and in_to_exists
#
CREATE TABLE t1 (a date, KEY (a)) ;
INSERT INTO t1 VALUES ('2009-01-01'),('2009-02-02');
set @old_optimizer_switch = @@optimizer_switch;
SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 DEPENDENT SUBQUERY t1 index NULL a 4 NULL 1 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
SET @@optimizer_switch='semijoin=off,materialization=on,in_to_exists=off,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 SUBQUERY t1 index NULL a 4 NULL 2 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
set @@optimizer_switch=@old_optimizer_switch;
drop table t1;
# return optimizer switch changed in the beginning of this test
set optimizer_switch=@subselect_tmp;
set optimizer_switch=default;

26
mysql-test/r/subselect_no_semijoin.result
View File

@@ -5822,6 +5822,32 @@ SELECT (SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0);
(SELECT f3a, f3a FROM t3 where f3a > 3) = (0, 0)
NULL
drop tables t1,t2,t3;
#
# LP BUG#825051 Wrong result with date/datetime and subquery with GROUP BY and in_to_exists
#
CREATE TABLE t1 (a date, KEY (a)) ;
INSERT INTO t1 VALUES ('2009-01-01'),('2009-02-02');
set @old_optimizer_switch = @@optimizer_switch;
SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 DEPENDENT SUBQUERY t1 index NULL a 4 NULL 1 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
SET @@optimizer_switch='semijoin=off,materialization=on,in_to_exists=off,subquery_cache=off';
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
2 SUBQUERY t1 index NULL a 4 NULL 2 Using index
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
a
2009-01-01
2009-02-02
set @@optimizer_switch=@old_optimizer_switch;
drop table t1;
# return optimizer switch changed in the beginning of this test
set optimizer_switch=@subselect_tmp;
set @optimizer_switch_for_subselect_test=null;