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Merge bk@192.168.21.1:mysql-4.1-opt

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into  mysql.com:/home/hf/work/29494/my41-29494
This commit is contained in:
holyfoot/hf@mysql.com/hfmain.(none) 2007-07-22 18:16:11 +05:00
commit 57a564673b
3 changed files with 46 additions and 1 deletions
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19
mysql-test/r/having.result
View File

@ -158,3 +158,22 @@ EXPLAIN SELECT 0 AS x, a FROM t1 GROUP BY x,a HAVING x=1 AND a > 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible HAVING
DROP table t1;
CREATE TABLE t1 (a int PRIMARY KEY);
CREATE TABLE t2 (b int PRIMARY KEY, a int);
CREATE TABLE t3 (b int, flag int);
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (1,1), (2,1), (3,1);
INSERT INTO t3(b,flag) VALUES (2, 1);
SELECT t1.a
FROM t1 INNER JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b
GROUP BY t1.a, t2.b HAVING MAX(t3.flag)=0;
a
SELECT DISTINCT t1.a, MAX(t3.flag)
FROM t1 INNER JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b
GROUP BY t1.a, t2.b HAVING MAX(t3.flag)=0;
a MAX(t3.flag)
SELECT DISTINCT t1.a
FROM t1 INNER JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b
GROUP BY t1.a, t2.b HAVING MAX(t3.flag)=0;
a
DROP TABLE t1,t2,t3;

26
mysql-test/t/having.test
View File

@ -151,4 +151,30 @@ EXPLAIN SELECT 0 AS x, a FROM t1 GROUP BY x,a HAVING x=1 AND a > 1;
DROP table t1;
#
# Bug #29911: HAVING clause depending on constant table and evaluated to false
#
CREATE TABLE t1 (a int PRIMARY KEY);
CREATE TABLE t2 (b int PRIMARY KEY, a int);
CREATE TABLE t3 (b int, flag int);
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (1,1), (2,1), (3,1);
INSERT INTO t3(b,flag) VALUES (2, 1);
SELECT t1.a
FROM t1 INNER JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b
GROUP BY t1.a, t2.b HAVING MAX(t3.flag)=0;
SELECT DISTINCT t1.a, MAX(t3.flag)
FROM t1 INNER JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b
GROUP BY t1.a, t2.b HAVING MAX(t3.flag)=0;
SELECT DISTINCT t1.a
FROM t1 INNER JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b
GROUP BY t1.a, t2.b HAVING MAX(t3.flag)=0;
DROP TABLE t1,t2,t3;
# End of 4.1 tests

2
sql/sql_select.cc
View File

@ -8118,7 +8118,7 @@ remove_duplicates(JOIN *join, TABLE *entry,List<Item> &fields, Item *having)
field_count++;
}
if (!field_count && !(join->select_options & OPTION_FOUND_ROWS))
if (!field_count && !(join->select_options & OPTION_FOUND_ROWS) && !having)
{ // only const items with no OPTION_FOUND_ROWS
join->unit->select_limit_cnt= 1; // Only send first row
DBUG_RETURN(0);