[jira] [Created] (SPARK-21318) The exception message thrown by `lookupFunction` is ambiguous.

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

StanZhai created SPARK-21318:
--------------------------------

             Summary: The exception message thrown by `lookupFunction` is ambiguous.
                 Key: SPARK-21318
                 URL: https://issues.apache.org/jira/browse/SPARK-21318
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.1.1, 2.1.0, 2.0.2, 2.0.1, 2.0.0
            Reporter: StanZhai
            Priority: Minor


The function actually exists, but the exception message is: 
{code}
This function is neither a registered temporary function nor a permanent function registered in the database 'default'.
{code}

My UDF has already been registered in the current database. But it's failed to init during lookupFunction. 

The exception message should be:
{code}
No handler for Hive UDF 'site.stanzhai.UDAFXXX': org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException: Two arguments is expected
{code}



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