[jira] [Commented] (SPARK-9150) Create a trait to track code generation for expressions

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-9150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14632311#comment-14632311 ] 

Apache Spark commented on SPARK-9150:
-------------------------------------

User 'rxin' has created a pull request for this issue:
https://github.com/apache/spark/pull/7487

> Create a trait to track code generation for expressions
> -------------------------------------------------------
>
>                 Key: SPARK-9150
>                 URL: https://issues.apache.org/jira/browse/SPARK-9150
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Reynold Xin
>            Assignee: Reynold Xin
>            Priority: Critical
>
> It is very hard to track which expression supports code generation or not. This patch removes the default gencode implementation from Expression, and moves the default fallback implementation into a new trait called CodegenFallback. Each concrete expression needs to either implement code generation, or mix in CodegenFallback.
> This makes it very easy to track which expressions have code generation implemented already.



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