Function LogicalSparseUnionNullCount

cpp/src/arrow/util/union_util.cc:28–41

namespace arrow::union_util {

int64_t LogicalSparseUnionNullCount(const ArraySpan& span) {
  const auto* sparse_union_type =
      internal::checked_cast<const SparseUnionType*>(span.type);
  DCHECK_LE(span.child_data.size(), 128);

  const int8_t* types = span.GetValues<int8_t>(1);  // NOLINT
  int64_t null_count = 0;
  for (int64_t i = 0; i < span.length; i++) {
    const int8_t child_id = sparse_union_type->child_ids()[types[i]];

    null_count += span.child_data[child_id].IsNull(span.offset + i);
  }
  return null_count;
}

int64_t LogicalDenseUnionNullCount(const ArraySpan& span) {
  const auto* dense_union_type = internal::checked_cast<const DenseUnionType*>(span.type);