groupByRolling method

LazyRollingGroupBy groupByRolling(
  1. Expr indexColumn, {
  2. Iterable<Expr> groupBy = const [],
  3. required RollingGroupByOptions options,
})

Implementation

LazyRollingGroupBy groupByRolling(
  Expr indexColumn, {
  Iterable<Expr> groupBy = const [],
  required RollingGroupByOptions options,
}) {
  _runtime._requireExpr(indexColumn);
  final keys = List<Expr>.unmodifiable(groupBy);
  for (final key in keys) {
    _runtime._requireExpr(key);
  }
  return LazyRollingGroupBy._(this, indexColumn, keys, options);
}