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https://issues.apache.org/jira/browse/SPARK-18214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-18214.
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Resolution: Fixed
Fix Version/s: 2.1.0
> Simplify RuntimeReplaceable type coercion
> -----------------------------------------
>
> Key: SPARK-18214
> URL: https://issues.apache.org/jira/browse/SPARK-18214
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Fix For: 2.1.0
>
>
> RuntimeReplaceable is used to create aliases for expressions, but the way it
> deals with type coercion is pretty weird (each expression is responsible for
> how to handle type coercion, which does not obey the normal implicit type
> cast rules).
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