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From "Xiao Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-21363) Prevent column name duplication in temporary view
Date Tue, 15 Aug 2017 06:52:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-21363?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xiao Li updated SPARK-21363:
----------------------------
    Target Version/s: 3.0.0

> Prevent column name duplication in temporary view
> -------------------------------------------------
>
>                 Key: SPARK-21363
>                 URL: https://issues.apache.org/jira/browse/SPARK-21363
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.1.1
>            Reporter: Takeshi Yamamuro
>            Priority: Minor
>
> In SPARK-20460, we refactored some existing checks for column name duplication. The master
currently allows name duplication for temporary views like an example below though, IMO we
better prevent it along with permanent views (the master prevents the case for the permanent
views).
> {code}
> scala> Seq((1, 1)).toDF("a", "a").createOrReplaceTempView("t")
> scala> sql("SELECT * FROM t").show
> +---+---+
> |  a|  a|
> +---+---+
> |  1|  1|
> +---+---+
> {code}



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