Method SortKeys

compiler/optimizer/optimizer.go:293–295

(seq dag.Seq)

}

func (o *Optimizer) SortKeys(seq dag.Seq) ([]order.SortKeys, error) {
	return o.propagateSortKey(dag.CopySeq(seq), []order.SortKeys{nil})
}

// propagateSortKey analyzes a Seq and attempts to push the scan order of the data source
// into the first downstream aggregation.  (We could continue the analysis past that