wangyum commented on PR #40462:
URL: https://github.com/apache/spark/pull/40462#issuecomment-1484408565

   rebalance before limit feels meaningless.
   If the user really wants to take n rows from each partition, the SQL should 
look like this:
   ```sql
   SELECT *
   FROM   (SELECT *,
                  Row_number() OVER(partition BY pmod(Hash(id, 42), 200) ORDER 
BY id) AS rn
           FROM   tbl)
   WHERE  rn <= 5;
   ```


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