[CP] fix hash hash sharding info bug

src/sql/optimizer/ob_join_order.cpp

@@ -4521,9 +4521,9 @@ int JoinPath::compute_hash_hash_sharding_info()
         } else {
           target_sharding = new (target_sharding) ObShardingInfo();
           target_sharding->set_distributed();
-          if (use_left) {
+          if (use_left && FULL_OUTER_JOIN != join_type_ && RIGHT_OUTER_JOIN != join_type_) {
             ret = target_sharding->get_partition_keys().assign(left_join_exprs);
-          } else if (use_right) {
+          } else if (use_right && FULL_OUTER_JOIN != join_type_ && LEFT_OUTER_JOIN != join_type_) {
             ret = target_sharding->get_partition_keys().assign(right_join_exprs);
           } else { /*do nothing*/ }