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https://issues.apache.org/jira/browse/SPARK-20829?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16844875#comment-16844875
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N Campbell commented on SPARK-20829:
------------------------------------
No reason was given.
A. Apache SPARK does not want to align to ISO-SQL and will document the delta
B. Apache SPARK will add an option for those who want ISO-SQL behaviour
> var_samp returns Nan while other vendors return a null value
> ------------------------------------------------------------
>
> Key: SPARK-20829
> URL: https://issues.apache.org/jira/browse/SPARK-20829
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: N Campbell
> Priority: Minor
> Labels: bulk-closed
> Attachments: TSUPPLY
>
>
> SELECT
> sno AS SNO,
> pno AS PNO,
> VAR_SAMP(qty) AS C1
> FROM
> tsupply
> GROUP BY
> sno,
> pno
> create table if not exists TSUPPLY (RNUM int , SNO string, PNO string, JNO
> string, QTY int )
> ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' LINES TERMINATED BY '\n'
> STORED AS textfile ;
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