[jira] [Updated] (SPARK-25334) Default SessionCatalog should support UDFs

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

     [ https://issues.apache.org/jira/browse/SPARK-25334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tomasz Gawęda updated SPARK-25334:
----------------------------------
    Summary: Default SessionCatalog should support UDFs  (was: Default SessionCatalog doesn't support UDFs)

> Default SessionCatalog should support UDFs
> ------------------------------------------
>
>                 Key: SPARK-25334
>                 URL: https://issues.apache.org/jira/browse/SPARK-25334
>             Project: Spark
>          Issue Type: Task
>          Components: SQL
>    Affects Versions: 2.3.1
>            Reporter: Tomasz Gawęda
>            Priority: Major
>
> SessionCatalog calls registerFunction to add a function to function registry. However, makeFunctionExpression supports only UserDefinedAggregateFunction.
> We should make makeFunctionExpression support UserDefinedFunction, as it's one of functions type.
> Currently we can use persistent functions only with Hive metastore, but "create function" command works also with default SessionCatalog. It sometimes cause user confusion, like in https://stackoverflow.com/questions/52164488/spark-hive-udf-no-handler-for-udaf-analysis-exception/52170519



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