…#6734)

when 'only_full_group_by' is set in sql_mode, raise error for non-aggregated column in query without GROUP BY.

mysql> create table t(a bigint, b bigint, c bigint);                                                                                           Query OK, 0 rows affected (0.02 sec)

mysql> select a, max(b) from t;
ERROR 1140 (42000): In aggregated query without GROUP BY, expression #1 of SELECT list contains nonaggregated column 'dc_test.t.a'; this is incompatible with sql_mode=only_full_group_by

Support stream aggregation.  version beta