Commit b3230cc2 authored by unknown's avatar unknown
Browse files

Test case for BUG#15102 : select distinct returns empty result, select count distinct > 0 (correct) 

  Reproduced in 5.0.16-nt. Tested to work in 5.0.20
  


mysql-test/r/group_min_max.result:
  Test case for BUG#15102 : select distinct returns empty result, select count distinct > 0 (correct)
    Reproduced in 5.0.16-nt. Tested to be fixed in 5.0.20
mysql-test/t/group_min_max.test:
  Test case for BUG#15102 : select distinct returns empty result, select count distinct > 0 (correct)
    Reproduced in 5.0.16-nt. Tested to be fixed in 5.0.20
parent 273aa489

mysql-test/r/group_min_max.result

+37 −0
Original line number Diff line number Diff line
@@ -2070,3 +2070,40 @@ SELECT a FROM t1 WHERE a LIKE 'B%' GROUP BY a; 
a

BB

DROP TABLE t1;

CREATE TABLE t1 (

a int(11) NOT NULL DEFAULT '0',

b varchar(16) COLLATE latin1_general_ci NOT NULL DEFAULT '',

PRIMARY KEY  (a,b)

) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;

CREATE PROCEDURE a(x INT)

BEGIN

DECLARE rnd INT;

DECLARE cnt INT;

WHILE x > 0 DO

SET rnd= x % 100;

SET cnt = (SELECT COUNT(*) FROM t1 WHERE a = rnd);

INSERT INTO t1(a,b) VALUES (rnd, CAST(cnt AS CHAR));

SET x= x - 1;

END WHILE;

END|

CALL a(1000);

SELECT a FROM t1 WHERE a=0;

a

0

0

0

0

0

0

0

0

0

0

SELECT DISTINCT a FROM t1 WHERE a=0;

a

0

SELECT COUNT(DISTINCT a) FROM t1 WHERE a=0;

COUNT(DISTINCT a)

1

DROP TABLE t1;

DROP PROCEDURE a;

mysql-test/t/group_min_max.test

+38 −0
Original line number Diff line number Diff line
@@ -736,3 +736,41 @@ SELECT DISTINCT a FROM t1 WHERE a LIKE 'B%'; 
SELECT a FROM t1 WHERE a LIKE 'B%' GROUP BY a;



DROP TABLE t1;





#

# Bug #15102: select distinct returns empty result, select count 

#             distinct > 0 (correct)

#



CREATE TABLE t1 (

   a int(11) NOT NULL DEFAULT '0',

   b varchar(16) COLLATE latin1_general_ci NOT NULL DEFAULT '',

   PRIMARY KEY  (a,b)

 ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;



delimiter |;



CREATE PROCEDURE a(x INT)

BEGIN

  DECLARE rnd INT;

  DECLARE cnt INT;



  WHILE x > 0 DO

    SET rnd= x % 100;

    SET cnt = (SELECT COUNT(*) FROM t1 WHERE a = rnd);

    INSERT INTO t1(a,b) VALUES (rnd, CAST(cnt AS CHAR));

    SET x= x - 1;

  END WHILE;

END|



DELIMITER ;|



CALL a(1000);



SELECT a FROM t1 WHERE a=0;

SELECT DISTINCT a FROM t1 WHERE a=0;

SELECT COUNT(DISTINCT a) FROM t1 WHERE a=0;



DROP TABLE t1;

DROP PROCEDURE a;