MDEV-10556 Assertion `0' failed in virtual void Item_sum_field::set_result_field(Field*)

mysql-test/r/func_group.result

@@ -2432,5 +2432,14 @@ c1
 3
 drop table t1,t2;
 #
+# MDEV-10556 Assertion `0' failed in virtual void Item_sum_field::set_result_field(Field*)
+#
+CREATE TABLE t1 (i INT, KEY(i)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (10),(20),(30);
+SELECT DISTINCT STDDEV(1) FROM t1 GROUP BY i ORDER BY BENCHMARK(0, BIT_XOR(i));
+STDDEV(1)
+0.0000
+DROP TABLE t1;
+#
 # End of 10.1 tests
 #

mysql-test/r/innodb_group.result

+#
+# Start of 10.1 tests
+#
+#
+# MDEV-10556 Assertion `0' failed in virtual void Item_sum_field::set_result_field(Field*)
+#
+CREATE TABLE t1 (i INT) ENGINE=InnoDB;
+SELECT DISTINCT STDDEV(1) FROM t1 GROUP BY i ORDER BY BENCHMARK(0, BIT_XOR(i));
+STDDEV(1)
+DROP TABLE t1;
+#
+# End of 10.1 tests
+#

mysql-test/t/func_group.test

@@ -1679,6 +1679,15 @@ select c1 from t1 having c1 >= (select t.c1 as c from t2 t order by (select min(
 select c1 from t1 having c1 >= (select t.c1 as c from t2 t order by (select min(t1.c1+tt.c1) from t2 tt));
 drop table t1,t2;
 
+--echo #
+--echo # MDEV-10556 Assertion `0' failed in virtual void Item_sum_field::set_result_field(Field*)
+--echo #
+
+CREATE TABLE t1 (i INT, KEY(i)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (10),(20),(30);
+SELECT DISTINCT STDDEV(1) FROM t1 GROUP BY i ORDER BY BENCHMARK(0, BIT_XOR(i));
+DROP TABLE t1;
+
 --echo #
 --echo # End of 10.1 tests
 --echo #

mysql-test/t/innodb_group.test

+#
+# Tests involving GROUP BY, aggregate functions and InnoDB
+#
+
+
+--source include/have_innodb.inc
+
+--echo #
+--echo # Start of 10.1 tests
+--echo #
+
+--echo #
+--echo # MDEV-10556 Assertion `0' failed in virtual void Item_sum_field::set_result_field(Field*)
+--echo #
+
+CREATE TABLE t1 (i INT) ENGINE=InnoDB;
+SELECT DISTINCT STDDEV(1) FROM t1 GROUP BY i ORDER BY BENCHMARK(0, BIT_XOR(i));
+DROP TABLE t1;
+
+--echo #
+--echo # End of 10.1 tests
+--echo #

sql/item_sum.h

@@ -1084,7 +1084,6 @@ public:
     fixed= true;
   }
   table_map used_tables() const { return (table_map) 1L; }
-  void set_result_field(Field *) { DBUG_ASSERT(0); }
   void save_in_result_field(bool no_conversions) { DBUG_ASSERT(0); }
 };