public override RowSet RowSet(STransaction tr, SQuery top, SDict <long, SFunction> ags, Context cx)
{
for (var b = order.First(); b != null; b = b.Next())
{
ags = b.Value.col.Aggregates(ags, cx);
}
var ags1 = ags;
for (var b = cpos.First(); b != null; b = b.Next())
{
ags1 = b.Value.Item2.Aggregates(ags1, cx);
}
RowSet r = new SelectRowSet(qry.RowSet(tr, this, ags1, cx), this, ags, cx);
// perform another pass on the selectlist just in case
if (!(qry is SGroupQuery))
{
for (var b = cpos.First(); b != null; b = b.Next())
{
ags = b.Value.Item2.Aggregates(ags, cx);
}
if (ags.Length != 0)
{
r = new EvalRowSet(((SelectRowSet)r)._source, this, ags, cx);
}
}
if (distinct)
{
r = new DistinctRowSet(r);
}
if (order.Length != 0)
{
r = new OrderedRowSet(r, this, cx);
}
return(r);
}
internal static DistinctRowBookmark?New(DistinctRowSet drs)
{
return((drs.rows.First() is Bookmark <ValueTuple <SRow, bool> > rb) ?
new DistinctRowBookmark(drs, rb, 0) : null);
}
DistinctRowBookmark(DistinctRowSet drs, Bookmark <ValueTuple <SRow, bool> > bmk, int pos)
: base(drs, bmk.Value.Item1, pos)
{
_drs = drs; _bmk = bmk;
}