[jira] [Resolved] (SPARK-37292) Removes outer join if it only has DISTINCT on streamed side with alias

["Dongjoon Hyun (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-37292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dongjoon Hyun resolved SPARK-37292.
-----------------------------------
    Fix Version/s: 3.3.0
       Resolution: Fixed

Issue resolved by pull request 34557
[https://github.com/apache/spark/pull/34557]

> Removes outer join if it only has DISTINCT on streamed side with alias
> ----------------------------------------------------------------------
>
>                 Key: SPARK-37292
>                 URL: https://issues.apache.org/jira/browse/SPARK-37292
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.3.0
>            Reporter: Yuming Wang
>            Priority: Major
>             Fix For: 3.3.0
>
>
> {code:scala}
>     spark.range(200L).selectExpr("id AS a").createTempView("t1")
>     spark.range(300L).selectExpr("id AS b").createTempView("t2")
>     spark.sql("SELECT DISTINCT a AS newAlias FROM t1 LEFT JOIN t2 ON a = b").explain(true)
> {code}
> Expected optimized plan:
> {noformat}
> == Optimized Logical Plan ==
> Aggregate [newAlias#8L], [newAlias#8L]
> +- Project [id#0L AS newAlias#8L]
>    +- Range (0, 200, step=1, splits=Some(2))
> {noformat}



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