[jira] [Updated] (SPARK-42513) Push topK through join

["Yuming Wang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-42513?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yuming Wang updated SPARK-42513:
--------------------------------
    Attachment: after-UI.png

> Push topK through join
> ----------------------
>
>                 Key: SPARK-42513
>                 URL: https://issues.apache.org/jira/browse/SPARK-42513
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.4.0
>            Reporter: Yuming Wang
>            Priority: Major
>         Attachments: after-UI.png, before-UI.png
>
>
> {code:scala}
>     spark.range(100000000).selectExpr("id % 10000 as a", "id as b").write.saveAsTable("t1")
>     spark.range(100000000).selectExpr("id % 10000 as x", "id as y").write.saveAsTable("t2")
>     sql("select * from t1 left join t2 on a = x order by b limit 5").collect()
>     spark.sql("set spark.sql.optimizer.excludedRules=org.apache.spark.sql.catalyst.optimizer.LimitPushDown")
>     sql("select * from t1 left join t2 on a = x order by b limit 5").collect()
> {code}



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