MssqlWindowFrame constructor

MssqlWindowFrame({ required MssqlFrameUnit unit, required MssqlFrameBound start, required MssqlFrameBound end, })

Implementation

MssqlWindowFrame({
  required this.unit,
  required this.start,
  required this.end,
}) {
  if (unit == MssqlFrameUnit.range &&
      (start.offset != null || end.offset != null)) {
    throw ArgumentError.value(
      unit,
      'unit',
      'SQL Server\'s RANGE accepts only UNBOUNDED and CURRENT ROW, never '
          'an offset: RANGE BETWEEN 3 PRECEDING is rejected. Use '
          'MssqlFrameUnit.rows for a count of rows.',
    );
  }
  if (start == MssqlFrameBound.unboundedFollowing) {
    throw ArgumentError.value(
      start,
      'start',
      'a frame cannot start after the end of its partition.',
    );
  }
  if (end == MssqlFrameBound.unboundedPreceding) {
    throw ArgumentError.value(
      end,
      'end',
      'a frame cannot end before the start of its partition.',
    );
  }
}