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Posted to issues@spark.apache.org by "Liang-Chi Hsieh (JIRA)" <ji...@apache.org> on 2018/04/30 13:06:00 UTC

[jira] [Created] (SPARK-24121) The API for handling expression code generation in expression codegen

Liang-Chi Hsieh created SPARK-24121:
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             Summary: 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


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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