Merge bk@192.168.21.1:mysql-4.1-opt

into  mysql.com:/home/hf/work/29494/my41-29494
parents 40fb6443 07e0cd2f
...@@ -158,3 +158,22 @@ EXPLAIN SELECT 0 AS x, a FROM t1 GROUP BY x,a HAVING x=1 AND a > 1; ...@@ -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 id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible HAVING 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible HAVING
DROP table t1; 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;
...@@ -151,4 +151,30 @@ EXPLAIN SELECT 0 AS x, a FROM t1 GROUP BY x,a HAVING x=1 AND a > 1; ...@@ -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; 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 # End of 4.1 tests
...@@ -8118,7 +8118,7 @@ remove_duplicates(JOIN *join, TABLE *entry,List<Item> &fields, Item *having) ...@@ -8118,7 +8118,7 @@ remove_duplicates(JOIN *join, TABLE *entry,List<Item> &fields, Item *having)
field_count++; 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 { // only const items with no OPTION_FOUND_ROWS
join->unit->select_limit_cnt= 1; // Only send first row join->unit->select_limit_cnt= 1; // Only send first row
DBUG_RETURN(0); DBUG_RETURN(0);
......
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