Method ensureWritable

bolt/vector/BaseVector.cpp:596–609

}

void BaseVector::ensureWritable(const SelectivityVector& rows) {
  auto newSize = std::max<vector_size_t>(rows.end(), length_);
  if (nulls_ && !nulls_->isMutable()) {
    BufferPtr newNulls = AlignedBuffer::allocate<bool>(newSize, pool_);
    auto rawNewNulls = newNulls->asMutable<uint64_t>();
    memcpy(rawNewNulls, rawNulls_, bits::nbytes(length_));

    nulls_ = std::move(newNulls);
    rawNulls_ = nulls_->as<uint64_t>();
  }

  this->resize(newSize);
  this->setMayChangeContentUnderSameAddress(true);
  this->resetDataDependentFlags(&rows);
}

void BaseVector::ensureWritable(