Function IsNullSparseUnion

cpp/src/arrow/array/data.cc:72–77

namespace internal {

bool IsNullSparseUnion(const ArrayData& data, int64_t i) {
  auto* union_type = checked_cast<const SparseUnionType*>(data.type.get());
  const auto* types = reinterpret_cast<const int8_t*>(data.buffers[1]->data());
  const int child_id = union_type->child_ids()[types[data.offset + i]];
  return data.child_data[child_id]->IsNull(i);
}

bool IsNullDenseUnion(const ArrayData& data, int64_t i) {
  auto* union_type = checked_cast<const DenseUnionType*>(data.type.get());