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https://issues.apache.org/jira/browse/SPARK-8822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14613573#comment-14613573
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Apache Spark commented on SPARK-8822:
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User 'rxin' has created a pull request for this issue:
https://github.com/apache/spark/pull/7220
> clean up type checking in math.scala
> ------------------------------------
>
> Key: SPARK-8822
> URL: https://issues.apache.org/jira/browse/SPARK-8822
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
>
> There are various issues w.r.t. type checking in math.scala. Most of the
> custom implementation of checkInputTypes can be replaced with mixin
> ExpectsInputTypes.
> There are also other minor issues, such as over complicating certain
> expressions due to the previous lack of implicit type casting among numeric
> types.
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