HanumathRao commented on a change in pull request #1417: DRILL-6645: Transform
TopN in Lateral Unnest pipeline to Sort and Limit.
URL: https://github.com/apache/drill/pull/1417#discussion_r207628873
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/physical/TopNPrel.java
##########
@@ -115,6 +118,16 @@ public Prel addImplicitRowIDCol(List<RelNode> children) {
.replace(this.getTraitSet().getTrait(DrillDistributionTraitDef.INSTANCE))
.replace(collationTrait)
.replace(DRILL_PHYSICAL);
- return (Prel) this.copy(traits, children);
+ return transformTopNToSortAndLimit(children, traits, collationTrait);
+ }
+
+ private Prel transformTopNToSortAndLimit(List<RelNode> children, RelTraitSet
traits, RelCollation collationTrait) {
Review comment:
SelectionVector are created at the later stage. This is called before
inserting the selectionvector.
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