public IRowCursor[] GetRowCursorSet(out IRowCursorConsolidator consolidator, Func <int, bool> needCol, int n, IRandom rand = null)
{
FillCacheIfNotFilled();
_host.Check(_canShuffle || rand == null, "Random access is not allowed on sorted data (2).");
_host.AssertValue(_autoView, "_autoView");
return(_autoView.GetRowCursorSet(out consolidator, needCol, n, rand));
}
public override IRowCursor[] GetRowCursorSet(out IRowCursorConsolidator consolidator, Func <int, bool> needCol, int n, IRandom rand = null)
{
Host.Check(string.IsNullOrEmpty(_sortColumn) || rand == null, "Random access is not allowed on sorted data. (6)");
Host.AssertValue(_transform, "_transform");
if (string.IsNullOrEmpty(_sortColumn))
{
return(_transform.GetRowCursorSet(out consolidator, needCol, n, rand));
}
else
{
int sortColumn;
Source.Schema.TryGetColumnIndex(_sortColumn, out sortColumn);
return(_transform.GetRowCursorSet(out consolidator, i => i == sortColumn || needCol(i), n, rand));
}
}
public override IRowCursor[] GetRowCursorSet(out IRowCursorConsolidator consolidator, Func <int, bool> needCol, int n, IRandom rand = null)
{
Host.AssertValue(_pipedTransform, "_pipedTransform");
return(_pipedTransform.GetRowCursorSet(out consolidator, needCol, n, rand));
}
