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https://issues.apache.org/jira/browse/HIVE-20351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16575177#comment-16575177
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Gopal V commented on HIVE-20351:
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For some reason, I left a comment about named_structs in the original commit.
{code}
&& oi instanceof StandardConstantStructObjectInspector) {
// do not fold named_struct, only struct()
ConstantObjectInspector coi = (ConstantObjectInspector) oi;
{code}
Can you try running this is in a query (i.e submit via Tez and see) - if I'm
not wrong some bit in Kryo breaks.
> GenericUDFNamedStruct should constant fold at compile time
> ----------------------------------------------------------
>
> Key: HIVE-20351
> URL: https://issues.apache.org/jira/browse/HIVE-20351
> Project: Hive
> Issue Type: Bug
> Reporter: Mykhailo Kysliuk
> Assignee: Mykhailo Kysliuk
> Priority: Minor
> Attachments: HIVE-20351.1.patch
>
>
> Reproduced at hive-3.0.
> When we run hive query:
> {code:java}
> select named_struct('Total','Total') from test;
> {code}
> We could see the ERROR at hiveserver logs:
> {code:java}
> 2018-05-25T15:18:13,182 ERROR [main] optimizer.ConstantPropagateProcFactory:
> Unable to evaluate
> org.apache.hadoop.hive.ql.udf.generic.GenericUDFNamedStruct@a0bf272. Return
> value unrecoginizable.
> {code}
> This error is harmless because all results are correct. But named_struct
> constant values should be processed correctly.
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