Method AppendNull

cpp/src/arrow/array/builder_nested.cc:130–137

}

Status MapBuilder::AppendNull() {
  DCHECK_EQ(item_builder_->length(), key_builder_->length());
  RETURN_NOT_OK(AdjustStructBuilderLength());
  RETURN_NOT_OK(list_builder_->AppendNull());
  length_ = list_builder_->length();
  null_count_ = list_builder_->null_count();
  return Status::OK();
}

Status MapBuilder::AppendNulls(int64_t length) {
  DCHECK_EQ(item_builder_->length(), key_builder_->length());