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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/05/21 04:35:40 UTC
[jira] [Resolved] (SPARK-11576) [SQL] Incorrect results when using
the nested self-join
[ https://issues.apache.org/jira/browse/SPARK-11576?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hyukjin Kwon resolved SPARK-11576.
----------------------------------
Resolution: Incomplete
> [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
> Labels: bulk-closed
>
> 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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