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https://issues.apache.org/jira/browse/HIVE-11462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14659554#comment-14659554
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Gopal V commented on HIVE-11462:
--------------------------------
I discovered that this implementation only consistently folds if there is
1-level of nesting.
ExprNodeConstantDesc is not built to handle complex types.
> GenericUDFStruct should constant fold at compile time
> -----------------------------------------------------
>
> Key: HIVE-11462
> URL: https://issues.apache.org/jira/browse/HIVE-11462
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Affects Versions: 2.0.0
> Reporter: Gopal V
> Attachments: HIVE-11462.1.patch, HIVE-11462.WIP.patch
>
>
> HIVE-11428 introduces a constant Struct Object, which is available for the
> runtime operators to assume as a constant parameter.
> This operator isn't constant folded during compilation since the UDF returns
> a complex type, which is logged as warning by the constant propogation layer.
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