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BUG#38072: Wrong result: HAVING not observed in a query with aggregate

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- Make send_row_on_empty_set() return FALSE when simplify_cond() has found out
  that HAVING is always FALSE
re-committing to put the fix into 5.0 and 5.1

mysql-test/r/group_by.result:
  BUG#38072: Wrong result: HAVING not observed in a query with aggregate
  - Testcase
mysql-test/t/group_by.test:
  BUG#38072: Wrong result: HAVING not observed in a query with aggregate
  - Testcase
sql/sql_select.h:
  BUG#38072: Wrong result: HAVING not observed in a query with aggregate
  - Make send_row_on_empty_set() return FALSE when simplify_cond() has found out
    that HAVING is always FALSE
This commit is contained in:
Sergey Petrunia 2008-10-24 06:16:22 +04:00
commit 844797c492
3 changed files with 60 additions and 1 deletions
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30
mysql-test/r/group_by.result
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@ -1359,4 +1359,34 @@ tt
41
SET sql_mode=@save_sql_mode;
DROP TABLE t1, t2;
#
# BUG#38072: Wrong result: HAVING not observed in a query with aggregate
#
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
int_nokey int(11) NOT NULL,
int_key int(11) NOT NULL,
varchar_key varchar(1) NOT NULL,
varchar_nokey varchar(1) NOT NULL,
PRIMARY KEY (pk),
KEY int_key (int_key),
KEY varchar_key (varchar_key)
);
INSERT INTO t1 VALUES
(1,5,5, 'h','h'),
(2,1,1, '{','{'),
(3,1,1, 'z','z'),
(4,8,8, 'x','x'),
(5,7,7, 'o','o'),
(6,3,3, 'p','p'),
(7,9,9, 'c','c'),
(8,0,0, 'k','k'),
(9,6,6, 't','t'),
(10,0,0,'c','c');
explain SELECT COUNT(varchar_key) AS X FROM t1 WHERE pk = 8 having 'foo'='bar';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible HAVING
SELECT COUNT(varchar_key) AS X FROM t1 WHERE pk = 8 having 'foo'='bar';
X
drop table t1;
End of 5.0 tests