vvysotskyi commented on a change in pull request #1426: DRILL-6671: Multi level
lateral unnest join is throwing an exception …
URL: https://github.com/apache/drill/pull/1426#discussion_r208514180
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File path:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/fragment/Materializer.java
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@@ -138,7 +138,7 @@ public PhysicalOperator visitUnnest(UnnestPOP unnest,
IndexedFragmentNode value)
final Wrapper info;
final int minorFragmentId;
- UnnestPOP unnest = null;
+ Stack<UnnestPOP> unnest = new Stack<>();
Review comment:
Could you please replace `Stack` usage by `Deque` and `ArrayDeque` and make
fields private final
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