RQG: wrong result on JOIN + NOT IN and partial_match_table_scan = OFF
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
MariaDB |
Invalid
|
Medium
|
Timour Katchaounov |
Bug Description
The following query:
SELECT table2 .`col_varchar_key`
FROM BB JOIN (
SELECT *
FROM C ) table2 ON table2 .`col_int_key`
WHERE ( 8 , 8 ) NOT IN (
SELECT SUBQUERY2_t1 .`col_int_key` , SUBQUERY2_t2 .`col_int_key`
FROM D SUBQUERY2_t1 JOIN C SUBQUERY2_t2 ON SUBQUERY2_t2 .`pk` ) ;
returns no rows under partial_
explain:
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
3 DEPENDENT SUBQUERY SUBQUERY2_t2 ref_or_null col_int_key col_int_key 5 3 Using index condition; Using where
3 DEPENDENT SUBQUERY SUBQUERY2_t1 ref_or_null col_int_key col_int_key 5 23 Using where; Using index
2 DERIVED C ALL NULL NULL NULL NULL 20
test case:
CREATE TABLE `D` (
`pk` int(11) NOT NULL AUTO_INCREMENT,
`col_int_key` int(11) DEFAULT NULL,
`col_varchar_key` varchar(1) DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `col_int_key` (`col_int_key`),
KEY `col_varchar_key` (`col_varchar_
) ENGINE=MyISAM AUTO_INCREMENT=101 DEFAULT CHARSET=latin1;
INSERT INTO `D` VALUES (1,NULL,'r');
INSERT INTO `D` VALUES (2,0,'c');
INSERT INTO `D` VALUES (3,0,'o');
INSERT INTO `D` VALUES (4,7,'c');
INSERT INTO `D` VALUES (5,8,'d');
INSERT INTO `D` VALUES (6,4,'v');
INSERT INTO `D` VALUES (7,6,'m');
INSERT INTO `D` VALUES (8,5,'j');
INSERT INTO `D` VALUES (9,NULL,'f');
INSERT INTO `D` VALUES (10,NULL,'n');
INSERT INTO `D` VALUES (11,8,'z');
INSERT INTO `D` VALUES (12,8,'h');
INSERT INTO `D` VALUES (13,8,'q');
INSERT INTO `D` VALUES (14,1,'w');
INSERT INTO `D` VALUES (15,1,'z');
INSERT INTO `D` VALUES (16,5,'j');
INSERT INTO `D` VALUES (17,2,'a');
INSERT INTO `D` VALUES (18,7,'m');
INSERT INTO `D` VALUES (19,6,'n');
INSERT INTO `D` VALUES (20,4,'e');
INSERT INTO `D` VALUES (21,7,'u');
INSERT INTO `D` VALUES (22,0,'s');
INSERT INTO `D` VALUES (23,9,'u');
INSERT INTO `D` VALUES (24,3,'r');
INSERT INTO `D` VALUES (25,5,'g');
INSERT INTO `D` VALUES (26,1,'o');
INSERT INTO `D` VALUES (27,1,'w');
INSERT INTO `D` VALUES (28,5,'b');
INSERT INTO `D` VALUES (29,9,NULL);
INSERT INTO `D` VALUES (30,2,'y');
INSERT INTO `D` VALUES (31,5,'y');
INSERT INTO `D` VALUES (32,248,'u');
INSERT INTO `D` VALUES (33,0,'p');
INSERT INTO `D` VALUES (34,8,'s');
INSERT INTO `D` VALUES (35,1,'e');
INSERT INTO `D` VALUES (36,255,'d');
INSERT INTO `D` VALUES (37,9,'d');
INSERT INTO `D` VALUES (38,9,'c');
INSERT INTO `D` VALUES (39,3,'b');
INSERT INTO `D` VALUES (40,9,'t');
INSERT INTO `D` VALUES (41,6,NULL);
INSERT INTO `D` VALUES (42,4,'y');
INSERT INTO `D` VALUES (43,60,'c');
INSERT INTO `D` VALUES (44,7,'d');
INSERT INTO `D` VALUES (45,1,'x');
INSERT INTO `D` VALUES (46,6,'p');
INSERT INTO `D` VALUES (47,4,'e');
INSERT INTO `D` VALUES (48,NULL,'g');
INSERT INTO `D` VALUES (49,8,'x');
INSERT INTO `D` VALUES (50,0,'s');
INSERT INTO `D` VALUES (51,8,'e');
INSERT INTO `D` VALUES (52,151,'l');
INSERT INTO `D` VALUES (53,7,'p');
INSERT INTO `D` VALUES (54,6,'h');
INSERT INTO `D` VALUES (55,NULL,'m');
INSERT INTO `D` VALUES (56,23,'n');
INSERT INTO `D` VALUES (57,2,'v');
INSERT INTO `D` VALUES (58,4,'b');
INSERT INTO `D` VALUES (59,NULL,'x');
INSERT INTO `D` VALUES (60,NULL,'r');
INSERT INTO `D` VALUES (61,77,'t');
INSERT INTO `D` VALUES (62,NULL,'w');
INSERT INTO `D` VALUES (63,NULL,'w');
INSERT INTO `D` VALUES (64,7,'k');
INSERT INTO `D` VALUES (65,1,'a');
INSERT INTO `D` VALUES (66,9,'t');
INSERT INTO `D` VALUES (67,6,'z');
INSERT INTO `D` VALUES (68,2,'e');
INSERT INTO `D` VALUES (69,3,'q');
INSERT INTO `D` VALUES (70,0,'e');
INSERT INTO `D` VALUES (71,NULL,'v');
INSERT INTO `D` VALUES (72,6,'d');
INSERT INTO `D` VALUES (73,3,'u');
INSERT INTO `D` VALUES (74,195,'o');
INSERT INTO `D` VALUES (75,5,'b');
INSERT INTO `D` VALUES (76,2,'c');
INSERT INTO `D` VALUES (77,7,'q');
INSERT INTO `D` VALUES (78,25,NULL);
INSERT INTO `D` VALUES (79,NULL,'h');
INSERT INTO `D` VALUES (80,0,'d');
INSERT INTO `D` VALUES (81,98,'w');
INSERT INTO `D` VALUES (82,6,'m');
INSERT INTO `D` VALUES (83,5,'i');
INSERT INTO `D` VALUES (84,0,'w');
INSERT INTO `D` VALUES (85,3,'f');
INSERT INTO `D` VALUES (86,1,'k');
INSERT INTO `D` VALUES (87,1,'v');
INSERT INTO `D` VALUES (88,147,'c');
INSERT INTO `D` VALUES (89,3,'y');
INSERT INTO `D` VALUES (90,3,'h');
INSERT INTO `D` VALUES (91,NULL,NULL);
INSERT INTO `D` VALUES (92,2,'t');
INSERT INTO `D` VALUES (93,1,'l');
INSERT INTO `D` VALUES (94,8,'a');
INSERT INTO `D` VALUES (95,8,'r');
INSERT INTO `D` VALUES (96,8,'s');
INSERT INTO `D` VALUES (97,0,'z');
INSERT INTO `D` VALUES (98,1,'j');
INSERT INTO `D` VALUES (99,8,'c');
INSERT INTO `D` VALUES (100,5,'f');
CREATE TABLE `C` (
`pk` int(11) NOT NULL AUTO_INCREMENT,
`col_int_key` int(11) DEFAULT NULL,
`col_varchar_key` varchar(1) DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `col_int_key` (`col_int_key`),
KEY `col_varchar_key` (`col_varchar_
) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1;
INSERT INTO `C` VALUES (1,2,'w');
INSERT INTO `C` VALUES (2,9,'m');
INSERT INTO `C` VALUES (3,3,'m');
INSERT INTO `C` VALUES (4,9,'k');
INSERT INTO `C` VALUES (5,NULL,'r');
INSERT INTO `C` VALUES (6,9,'t');
INSERT INTO `C` VALUES (7,3,'j');
INSERT INTO `C` VALUES (8,8,'u');
INSERT INTO `C` VALUES (9,8,'h');
INSERT INTO `C` VALUES (10,53,'o');
INSERT INTO `C` VALUES (11,0,NULL);
INSERT INTO `C` VALUES (12,5,'k');
INSERT INTO `C` VALUES (13,166,'e');
INSERT INTO `C` VALUES (14,3,'n');
INSERT INTO `C` VALUES (15,0,'t');
INSERT INTO `C` VALUES (16,1,'c');
INSERT INTO `C` VALUES (17,9,'m');
INSERT INTO `C` VALUES (18,5,'y');
INSERT INTO `C` VALUES (19,6,'f');
INSERT INTO `C` VALUES (20,2,'d');
CREATE TABLE `BB` (
`pk` int(11) NOT NULL AUTO_INCREMENT,
`col_int_key` int(11) DEFAULT NULL,
`col_varchar_key` varchar(1) DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `col_int_key` (`col_int_key`),
KEY `col_varchar_key` (`col_varchar_
) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=latin1;
INSERT INTO `BB` VALUES (10,8,NULL);
SET @@optimizer_
SELECT table2 .`col_varchar_key`
FROM BB JOIN (
SELECT *
FROM C ) table2 ON table2 .`col_int_key`
WHERE ( 8 , 8 ) NOT IN (
SELECT SUBQUERY2_t1 .`col_int_key` , SUBQUERY2_t2 .`col_int_key`
FROM D SUBQUERY2_t1 JOIN C SUBQUERY2_t2 ON SUBQUERY2_t2 .`pk` ) ;
Changed in maria: | |
importance: | Undecided → Medium |
assignee: | nobody → Timour Katchaounov (timour) |
Changed in maria: | |
milestone: | none → 5.3 |
Changed in maria: | |
status: | Fix Committed → In Progress |
The bug is present also in MariaDB 5.2, as well as the current 5.3 where the relevant
logic is the same.
The bug cannot be reproduced in 5.3-mwl89.