[jira] [Resolved] (SPARK-22520) Support code generation also for complex CASE WHEN

["Wenchen Fan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-22520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan resolved SPARK-22520.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.3.0

Issue resolved by pull request 19752
[https://github.com/apache/spark/pull/19752]

> 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
>            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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