Method createInternal

bolt/vector/ComplexVector.cpp:1373–1388

static

  BaseVector::resize(newSize, false);
  bits::fillBits(mutableRawNulls(), oldSize, newSize, bits::kNull);
}

// static
CompositeRowVectorPtr CompositeRowVector::createInternal(
    const TypePtr& type,
    vector_size_t size,
    bolt::memory::MemoryPool* pool,
    std::unique_ptr<SelectivityVector> validColumns) {
  std::vector<VectorPtr> children;
  auto&& rowType = type->as<TypeKind::ROW>();
  children.resize(rowType.size());
  if (validColumns) {
    validColumns->applyToSelected([&](vector_size_t row) {
      children[row] = BaseVector::create(rowType.childAt(row), size, pool);
    });
  }
  return std::make_shared<CompositeRowVector>(
      type, size, pool, std::move(validColumns), std::move(children));
}