sohami 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_r207584274
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/physical/visitor/LateralUnnestRowIDVisitor.java
##########
@@ -43,7 +43,7 @@ public static Prel insertRowID(Prel prel){
public Prel visitPrel(Prel prel, Boolean isRightOfLateral) throws
RuntimeException {
List<RelNode> children = getChildren(prel, isRightOfLateral);
if (isRightOfLateral) {
- return prel.addImplicitRowIDCol(children);
+ return prel.getRelForLateralUnnestPipeline(children);
} else {
return (Prel) prel.copy(prel.getTraitSet(), children);
Review comment:
given that Unnest can also be on left side of Lateral shouldn't we add
implicit column for operators on left subtree of Lateral as well iff Unnest is
present ?
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