cloud-fan commented on PR #37284:
URL: https://github.com/apache/spark/pull/37284#issuecomment-1196223162

   > Due to the output ordering of ShuffleExchangeExec is unkown
   
   OK I get it now. Shuffle reader fetches shuffle blocks in random order, even 
if each partition of the child plan is sorted, the final data is not sorted.
   
   The change LGTM, can you add more comments in the classdoc of `GlobalLimit`?


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