Github user amansinha100 commented on a diff in the pull request:
https://github.com/apache/drill/pull/748#discussion_r101632437
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/physical/NestedLoopJoinPrule.java
---
@@ -49,7 +49,7 @@ protected boolean checkPreconditions(DrillJoinRel join,
RelNode left, RelNode ri
PlannerSettings settings) {
JoinRelType type = join.getJoinType();
- if (! (type == JoinRelType.INNER || type == JoinRelType.LEFT)) {
+ if (!(type == JoinRelType.INNER || (type == JoinRelType.LEFT &&
JoinUtils.hasScalarSubqueryInput(left, right)))) {
--- End diff --
@Serhii-Harnyk were you able to confirm what @zfong asked about w.r.t
correctness ? The code is still allowing left nested join with scalar subquery,
so it seems her comment is still valid.
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