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

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

     [ https://issues.apache.org/jira/browse/SPARK-21318?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan updated SPARK-21318:
--------------------------------
    Target Version/s: 2.5.0  (was: 2.4.0)

> The exception message thrown by `lookupFunction` is ambiguous.
> --------------------------------------------------------------
>
>                 Key: SPARK-21318
>                 URL: https://issues.apache.org/jira/browse/SPARK-21318
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.0.0, 2.0.1, 2.0.2, 2.1.0, 2.1.1
>            Reporter: StanZhai
>            Priority: Minor
>
> The function actually exists in current selected database, 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}
> This is not conducive to positioning problems.



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