fetch method

Implementation

@override
bool fetch() {
  if (cursor == null) return false;
  if (!cursor!.fSelectable) return false;
  if (logEvent(TDBEventType.detFetch)) {
    log(TDBEventType.detFetch, _statement._serverSQL);
  }
  if (!_isEOF) {
    _isEOF = !sqlConnection!.fetch(cursor!);
  }
  return !_isEOF;
}