danny0405 commented on a change in pull request #2208:
URL: https://github.com/apache/calcite/pull/2208#discussion_r503626114
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File path: core/src/main/java/org/apache/calcite/sql2rel/RelDecorrelator.java
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@@ -680,6 +677,17 @@ private static void shiftMapping(Map<Integer, Integer>
mapping, int startIndex,
public Frame getInvoke(RelNode r, RelNode parent) {
final Frame frame = dispatcher.invoke(r);
+ if (frame != null && parent instanceof Correlate && r instanceof Sort) {
Review comment:
Finally i changes to check if the sort has a parent, if it does, that
means the sort is definitely a branch of `Correlate` (if the sort input has
been rewritten)
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