[HIVE-20351] GenericUDFNamedStruct should constant fold at compile time

• Type: Bug
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Assignee: Mykhailo Kysliuk
• Reporter: Mykhailo Kysliuk
• Created: 09/Aug/18 15:33
• Updated: 22/Aug/18 15:43

Description

Reproduced at hive-3.0.

When we run hive query:

select named_struct('Total','Total') from test;

We could see the ERROR at hiveserver logs:

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.

This error is harmless because all results are correct. But named_struct constant values should be processed correctly.

Issue Links

• relates to: HIVE-13951 GenericUDFArray should constant fold at compile time
• relates to: HIVE-11462 GenericUDFStruct should constant fold at compile time