Method appendNulls

bolt/vector/ComplexVector.cpp:1361–1370

    const BaseVector* source,
    const folly::Range<const CopyRange*>& ranges) {
  copyRangesImpl(source, ranges, &values_, &keys_);
}

void RowVector::appendNulls(vector_size_t numberOfRows) {
  BOLT_CHECK_GE(numberOfRows, 0);
  if (numberOfRows == 0) {
    return;
  }
  const vector_size_t newSize = numberOfRows + BaseVector::length_;
  const vector_size_t oldSize = BaseVector::length_;
  BaseVector::resize(newSize, false);
  bits::fillBits(mutableRawNulls(), oldSize, newSize, bits::kNull);
}