Fixed bug #14274: a query with a having clause containing only set function...

Fixed bug #14274: a query with a having clause containing only set function returned a wrong result set.


mysql-test/r/having.result:
  Added a test case for bug #14274.
mysql-test/t/having.test:
  Added a test case for bug #14274.
sql/sql_select.cc:
  Fixed bug #14274: a query with a having clause containing only set function returned a wrong result set.
  It happened because processing of the set functions in having started with a call of the split_sum_func
  method, instead of the split_sum_func2 method.

mysql-test/r/having.result

@@ -128,3 +128,16 @@ id	description	c
 1	test	0
 2	test2	0
 drop table t1,t2,t3;
+CREATE TABLE t1 (a int);
+INSERT INTO t1 VALUES (3), (4), (1), (3), (1);
+SELECT SUM(a) FROM t1 GROUP BY a HAVING SUM(a)>0;
+SUM(a)
+2
+6
+4
+SELECT SUM(a) FROM t1 GROUP BY a HAVING SUM(a);
+SUM(a)
+2
+6
+4
+DROP TABLE t1;

mysql-test/t/having.test

@@ -123,4 +123,16 @@ group by a.id, a.description
 having (a.description is not null) and (c=0);
 drop table t1,t2,t3;
 
+#
+# Bug #14274: HAVING clause containing only set function
+#
+
+CREATE TABLE t1 (a int);
+INSERT INTO t1 VALUES (3), (4), (1), (3), (1);
+
+SELECT SUM(a) FROM t1 GROUP BY a HAVING SUM(a)>0;
+SELECT SUM(a) FROM t1 GROUP BY a HAVING SUM(a);
+
+DROP TABLE t1;
+
 # End of 4.1 tests

sql/sql_select.cc

@@ -287,7 +287,7 @@ JOIN::prepare(Item ***rref_pointer_array,
     if (having_fix_rc || thd->net.report_error)
       DBUG_RETURN(-1);				/* purecov: inspected */
     if (having->with_sum_func)
-      having->split_sum_func(thd, ref_pointer_array, all_fields);
+      having->split_sum_func2(thd, ref_pointer_array, all_fields, &having);
   }
 
   // Is it subselect