[jira] [Work started] (HIVE-20351) GenericUDFNamedStruct should constant fold at compile time

["Mykhailo Kysliuk (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-20351?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-20351 started by Mykhailo Kysliuk.
-----------------------------------------------
> 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
>
> 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 not harmless because all results are correct. But named_struct constant values should be processed correctly.



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