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From "Kazuaki Ishizaki (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-15258) Nested/Chained case statements generate codegen over 64k exception
Date Sun, 22 May 2016 05:24:12 GMT

    [ https://issues.apache.org/jira/browse/SPARK-15258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15295402#comment-15295402
] 

Kazuaki Ishizaki commented on SPARK-15258:
------------------------------------------

This PR is not for SPARK-15258. This is for SPARK-15285. Sorry.

> Nested/Chained case statements generate codegen over 64k exception
> ------------------------------------------------------------------
>
>                 Key: SPARK-15258
>                 URL: https://issues.apache.org/jira/browse/SPARK-15258
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.6.1
>            Reporter: Jonathan Gray
>         Attachments: NestedCases.scala
>
>
> Nested/Chained case-when expressions generate a codegen goes beyound 64k exception.
> A test attached demonstrates this behaviour.
> I'd like to try and fix this but don't really know the best place to start.  Ideally,
I'd like to avoid the codegen fallback as with large volumes this hurts performance.
> This is similar(ish) to SPARK-13242 but I'd like to see if there are any alternatives
to the codegen fallback approach.



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