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Posted to issues@spark.apache.org by "XiDuo You (Jira)" <ji...@apache.org> on 2022/07/05 09:24:00 UTC

[jira] [Created] (SPARK-39679) TakeOrderedAndProjectExec should respect child output ordering

XiDuo You created SPARK-39679:
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             Summary: TakeOrderedAndProjectExec should respect child output ordering
                 Key: SPARK-39679
                 URL: https://issues.apache.org/jira/browse/SPARK-39679
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.4.0
            Reporter: XiDuo You


TakeOrderedAndProjectExec should respect child output ordering to avoid unnecessary sort. For example:  TakeOrderedAndProjectExec on the top of SortMergeJoin.
{code:java}
SELECT * FROM t1 JOIN t2 ON t1.c1 = t2.c2 ORDER BY t1.c1 LIMIT 100;
{code}



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