[jira] [Commented] (SPARK-11576) [SQL] Incorrect results when using the nested self-join

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-11576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15069921#comment-15069921 ] 

Apache Spark commented on SPARK-11576:
--------------------------------------

User 'yzhou2001' has created a pull request for this issue:
https://github.com/apache/spark/pull/10450

> [SQL] Incorrect results when using the nested self-join
> -------------------------------------------------------
>
>                 Key: SPARK-11576
>                 URL: https://issues.apache.org/jira/browse/SPARK-11576
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.5.0
>            Reporter: Xiao Li
>            Priority: Critical
>
> val df1 = Seq((1, 3), (2, 1)).toDF("keyCol1", "keyCol2")
> val df2 = Seq((1, 4), (2, 1)).toDF("keyCol1", "keyCol3")
> val df3 = df1.join(df2, df1("keyCol1") === df2("keyCol1")).select(df1("keyCol1"), $"keyCol3")
> df3.join(df1, df3("keyCol3") === df1("keyCol1")).show()
> The above query returns an empty result set. 
> However, the correct result should be (2,1,1,3). 



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