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From "Mykhailo Kysliuk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-20351) GenericUDFNamedStruct should constant fold at compile time
Date Fri, 17 Aug 2018 14:25:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-20351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16584001#comment-16584001
] 

Mykhailo Kysliuk commented on HIVE-20351:
-----------------------------------------

[~gopalv]
When we run query 
{code}
select x, to_json(named_struct('Total', 1.0)), named_struct('Total', 1.0) from test order
by x;
{code}
We are getting the next error:
{code}
FAILED: SemanticException [Error 10014]: Line 1:10 Wrong arguments '1.0': Don't know how to
handle object inspector org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableConstantHiveDecimalObjectInspector@35d4fecf
{code}
This happens at to_json function(with and without fix). If we put integer value at parameters
everything works fine.
Single named_struct UDF works fine with all of argument types. No errors at logs anymore.

> 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, HIVE-20351.2.patch, HIVE-20351.3.patch, HIVE-20351.4.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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