Method copy

bolt/vector/BaseVector.cpp:736–757

  }

  return ranges;
}

void BaseVector::copy(
    const BaseVector* source,
    const SelectivityVector& rows,
    const vector_size_t* toSourceRow,
    bool canCopyAll) {
  if (!rows.hasSelections()) {
    return;
  }
  std::vector<CopyRange> ranges;
  if (toSourceRow == nullptr) {
    BOLT_CHECK_GE(source->size(), rows.end());
    ranges = toCopyRanges(rows);
  } else {
    ranges.reserve(rows.end());
    rows.applyToSelected([&](vector_size_t row) {
      const auto sourceRow = toSourceRow[row];
      BOLT_DCHECK_GT(source->size(), sourceRow);
      ranges.push_back({sourceRow, row, 1});
    });
  }
  copyRanges(source, ranges);
}