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https://issues.apache.org/jira/browse/SPARK-24121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-24121.
---------------------------------
Resolution: Fixed
Fix Version/s: 2.4.0
Issue resolved by pull request 21193
[https://github.com/apache/spark/pull/21193]
> The API for handling expression code generation in expression codegen
> ---------------------------------------------------------------------
>
> Key: SPARK-24121
> URL: https://issues.apache.org/jira/browse/SPARK-24121
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Liang-Chi Hsieh
> Assignee: Liang-Chi Hsieh
> Priority: Major
> Fix For: 2.4.0
>
>
> In order to achieve the replacement of expr value during expression codegen
> (please see the proposal at
> [https://github.com/apache/spark/pull/19813#issuecomment-354045400),] we need
> an API to handle the insertion of temporary symbols for statements generated
> by expressions. This API must allow us to know what statement expressions are
> during codegen and to use symbols instead of actual codes when generating
> java codes.
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