cloud-fan commented on code in PR #37284:
URL: https://github.com/apache/spark/pull/37284#discussion_r930713783
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala:
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@@ -1430,9 +1430,13 @@ object Limit {
/**
* A global (coordinated) limit. This operator can emit at most `limitExpr`
number in total.
*
+ * We can not make it inherit [[OrderPreservingUnaryNode]] due to the
different strategy of
+ * physical plan. The output ordering of child will be broken if a shuffle
exchange comes in
+ * between the child and global limit.
Review Comment:
That said, we can bring this back in the future if our shuffle reader
fetches blocks in sequence.
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