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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2015/07/18 09:12:04 UTC

[jira] [Updated] (SPARK-9150) Create CodegenFallback and Unevaluable trait

     [ https://issues.apache.org/jira/browse/SPARK-9150?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin updated SPARK-9150:
-------------------------------
    Summary: Create CodegenFallback and Unevaluable trait  (was: Create a trait to track code generation for expressions)

> Create CodegenFallback and Unevaluable trait
> --------------------------------------------
>
>                 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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