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https://issues.apache.org/jira/browse/SPARK-8770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-8770.
--------------------------------
    Resolution: Fixed

> BinaryOperator expression
> -------------------------
>
>                 Key: SPARK-8770
>                 URL: https://issues.apache.org/jira/browse/SPARK-8770
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Reynold Xin
>            Assignee: Reynold Xin
>             Fix For: 1.5.0
>
>
> Our current BinaryExpression abstract class is not for generic binary 
> expressions, i.e. it requires left/right children to have the same type. 
> However, due to its name, contributors build new binary expressions that 
> don't have that assumption (e.g. Sha) and still extend BinaryExpression.
> We should create a new BinaryOperator abstract class with this assumption, 
> and update the analyzer to only apply type casting rule there.



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