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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-22520) Support code generation also for complex CASE WHEN
Date Tue, 28 Nov 2017 08:29:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-22520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16268371#comment-16268371
] 

Apache Spark commented on SPARK-22520:
--------------------------------------

User 'cloud-fan' has created a pull request for this issue:
https://github.com/apache/spark/pull/19830

> Support code generation also for complex CASE WHEN
> --------------------------------------------------
>
>                 Key: SPARK-22520
>                 URL: https://issues.apache.org/jira/browse/SPARK-22520
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Marco Gaido
>            Assignee: Marco Gaido
>            Priority: Minor
>             Fix For: 2.3.0
>
>
> Code generation is disabled for CaseWhen when the number of branches is higher than {{spark.sql.codegen.maxCaseBranches}}
(which defaults to 20). This was done in SPARK-13242 to prevent the well known 64KB method
limit exception.
> This tickets proposes to support code generation also in those cases (without causing
exceptions of course). As a side effect, we could get rid of the {{spark.sql.codegen.maxCaseBranches}}
configuration.



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