[jira] [Resolved] (SPARK-12491) UDAF result differs in SQL if alias is used

["Yin Huai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-12491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yin Huai resolved SPARK-12491.
------------------------------
       Resolution: Duplicate
    Fix Version/s: 1.6.0
                   1.5.3

> UDAF result differs in SQL if alias is used
> -------------------------------------------
>
>                 Key: SPARK-12491
>                 URL: https://issues.apache.org/jira/browse/SPARK-12491
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.5.2
>            Reporter: Tristan
>             Fix For: 1.5.3, 1.6.0
>
>         Attachments: UDAF_GM.zip
>
>
> Using the GeometricMean UDAF example (https://databricks.com/blog/2015/09/16/spark-1-5-dataframe-api-highlights-datetimestring-handling-time-intervals-and-udafs.html), I found the following discrepancy in results:
> {code}
> scala> sqlContext.sql("select group_id, gm(id) from simple group by group_id").show()
> +--------+---+
> |group_id|_c1|
> +--------+---+
> |       0|0.0|
> |       1|0.0|
> |       2|0.0|
> +--------+---+
> scala> sqlContext.sql("select group_id, gm(id) as GeometricMean from simple group by group_id").show()
> +--------+-----------------+
> |group_id|    GeometricMean|
> +--------+-----------------+
> |       0|8.981385496571725|
> |       1|7.301716979342118|
> |       2|7.706253151292568|
> +--------+-----------------+
> {code}



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