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https://issues.apache.org/jira/browse/SPARK-14577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15238786#comment-15238786
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Apache Spark commented on SPARK-14577:
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User 'dongjoon-hyun' has created a pull request for this issue:
https://github.com/apache/spark/pull/12353
> spark.sql.codegen.maxCaseBranches config option
> -----------------------------------------------
>
> Key: SPARK-14577
> URL: https://issues.apache.org/jira/browse/SPARK-14577
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
>
> We currently disable codegen for CaseWhen if the number of branches is
> greater than 20 (in CaseWhen.MAX_NUM_CASES_FOR_CODEGEN). It would be better
> if this value is a non-public config defined in SQLConf.
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