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https://issues.apache.org/jira/browse/SPARK-20569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15994564#comment-15994564
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Umesh Chaudhary commented on SPARK-20569:
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I believe [~marmbrus] is the best person to answer the question about current
implementation.
> In spark-sql,Some functions can execute successfully, when the number of
> input parameter is wrong
> --------------------------------------------------------------------------------------------------
>
> Key: SPARK-20569
> URL: https://issues.apache.org/jira/browse/SPARK-20569
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: liuxian
> Priority: Trivial
>
> >select Nvl(null,'1',3);
> >3
> The function of "Nvl" has Only two input parameters,so, when input three
> parameters, i think it should notice that:"Error in query: Invalid number of
> arguments for function nvl".
> Such as "nvl2", "nullIf","IfNull",these have a similar problem
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