Method appendNull

pj_datastore/src/column_buffer.cpp:153–180

}

void TypedColumnBuffer::appendNull() {
  ensureValidityInitialized();

  // Ensure bitmap has room for this row.
  validity_.ensureSize(row_count_ + 1);
  validity_.setNull(row_count_);

  // Append zero bytes for the value slot.
  const StorageKind kind = storageKindOf(descriptor_.logical_type);
  if (kind == StorageKind::kString) {
    // For strings: write the initial offset if this is the first row.
    if (row_count_ == 0) {
      const uint32_t zero = 0;
      offsets_.append(&zero, sizeof(zero));
    }
    // Duplicate the current end offset (no new string data).
    const auto current_offset = static_cast<uint32_t>(values_.size());
    offsets_.append(&current_offset, sizeof(current_offset));
  } else {
    const std::size_t type_size = storageKindSize(kind);
    // Append type_size zero bytes.
    const uint64_t zero = 0;  // 8 bytes, enough for any fixed type
    values_.append(&zero, type_size);
  }

  ++row_count_;
  ++null_count_;
}

// ---------------------------------------------------------------------------
// Bulk fixed-size append template