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https://issues.apache.org/jira/browse/SPARK-9168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14634508#comment-14634508
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Apache Spark commented on SPARK-9168:
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User 'yjshen' has created a pull request for this issue:
https://github.com/apache/spark/pull/7523
> Add nanvl expression
> --------------------
>
> Key: SPARK-9168
> URL: https://issues.apache.org/jira/browse/SPARK-9168
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Yijie Shen
>
> Similar to Oracle's nanvl:
> nanvl(v1, v2)
> if v1 is NaN, returns v2; otherwise, returns v1.
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