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https://issues.apache.org/jira/browse/SPARK-35688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17363077#comment-17363077
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Fu Chen commented on SPARK-35688:
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Hi, [~maropu] , [~hyukjin.kwon] .
I can reproduce the bug by providing snippet code ( in the master branch).
When we enabled subexpression elimination, The interpreted predicate
implementation`[GeneratePredicate|https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratePredicate.scala#L63-L64]`
will eval the subexpressions (in this case `explode_name_array(name)`) before
other condition expressions.
But note that the UDF may depend on the other condition. In this case, the UDF
`name2Array` depends on the condition `name <> '?'`.
> GeneratePredicate eliminate will fail in some case
> ---------------------------------------------------
>
> Key: SPARK-35688
> URL: https://issues.apache.org/jira/browse/SPARK-35688
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.1
> Reporter: todd.chen
> Priority: Major
>
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