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https://issues.apache.org/jira/browse/SPARK-33427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17235086#comment-17235086
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Apache Spark commented on SPARK-33427:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/30414
> Interpreted subexpression elimination
> -------------------------------------
>
> Key: SPARK-33427
> URL: https://issues.apache.org/jira/browse/SPARK-33427
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: L. C. Hsieh
> Assignee: L. C. Hsieh
> Priority: Major
> Fix For: 3.1.0
>
>
> Currently we only do subexpression elimination for codegen. For some reasons,
> we may need to run interpreted expression valuation. For example, codegen
> fails to compile and fallback to interpreted mode. It is commonly seen for
> complex schema from expressions that is possibly caused by the query
> optimizer too, e.g. SPARK-32945.
> We should also support subexpression elimination for interpreted evaluation.
> That could reduce performance difference when Spark fallbacks from codegen to
> interpreted expression evaluation.
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