Merge olga.mysql.com:/home/igor/dev-opt/mysql-4.1-opt-bug29911

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug29911

mysql-test/r/having.result

@@ -158,6 +158,25 @@ 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;
 create table t1 (col1 int, col2 varchar(5), col_t1 int);
 create table t2 (col1 int, col2 varchar(5), col_t2 int);
 create table t3 (col1 int, col2 varchar(5), col_t3 int);

mysql-test/t/having.test

@@ -151,6 +151,32 @@ 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
 
 #

sql/sql_select.cc

@@ -12738,7 +12738,7 @@ 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);