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https://issues.apache.org/jira/browse/SPARK-16489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin updated SPARK-16489:
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    Fix Version/s: 1.6.3

> Test harness to prevent expression code generation from reusing variable names
> ------------------------------------------------------------------------------
>
>                 Key: SPARK-16489
>                 URL: https://issues.apache.org/jira/browse/SPARK-16489
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>            Reporter: Reynold Xin
>            Assignee: Reynold Xin
>             Fix For: 1.6.3, 2.0.0
>
>
> In code generation, it is incorrect for expressions to reuse variable names 
> across different instances of itself. As an example, SPARK-16488 reports a 
> bug in which pmod expression reuses variable name "r".
> This patch updates ExpressionEvalHelper test harness to always project two 
> instances of the same expression, which will help us catch variable reuse 
> problems in expression unit tests.



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