Function PayloadIsEmpty

cpp/src/arrow/acero/hash_join_node.h:91–94

                                            const Expression& filter);

  bool PayloadIsEmpty(int side) const {
    assert(side == 0 || side == 1);
    return proj_maps[side].num_cols(HashJoinProjection::PAYLOAD) == 0;
  }

  static Result<std::vector<FieldRef>> ComputePayload(const Schema& schema,
                                                      const std::vector<FieldRef>& output,