iwanttobepowerful commented on code in PR #4633:
URL: https://github.com/apache/calcite/pull/4633#discussion_r2625387863
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core/src/main/java/org/apache/calcite/sql2rel/RelDecorrelator.java:
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@@ -1045,29 +1037,31 @@ private static void shiftMapping(Map<Integer, Integer>
mapping, int startIndex,
}
protected @Nullable Frame decorrelateFetchOneSort(Sort sort, final Frame
frame) {
- Frame aggFrame = decorrelateSortAsAggregate(sort, frame);
- if (aggFrame != null) {
- return aggFrame;
+ if (sort.offset == null
+ && sort.fetch != null
+ && RexLiteral.intValue(sort.fetch) == 0) {
Review Comment:
The purpose of this if check is to skip the subsequent optimization process.
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