GitHub user hvanhovell opened a pull request:

    https://github.com/apache/spark/pull/15542

    [SPARK-17996][SQL] Fix unqualified catalog.getFunction(...)

    ## What changes were proposed in this pull request?
    Currently an unqualified `getFunction(..)`call returns a wrong result; the 
returned function is shown as temporary function without a database. For 
example:
    ```
    scala> sql("create function fn1 as 
'org.apache.hadoop.hive.ql.udf.generic.GenericUDFAbs'")
    res0: org.apache.spark.sql.DataFrame = []
    
    scala> spark.catalog.getFunction("fn1")
    res1: org.apache.spark.sql.catalog.Function = Function[name='fn1', 
className='org.apache.hadoop.hive.ql.udf.generic.GenericUDFAbs', 
isTemporary='true']
    ```
    
    This PR fixes this by adding database information to ExpressionInfo (which 
is used to store the function information).
    ## How was this patch tested?
    Added more thorough tests to `CatalogSuite`.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/hvanhovell/spark SPARK-17996

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/15542.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #15542
    
----
commit 6068e44a0ca7128105f95bc438ed958b57c11f55
Author: Herman van Hovell <hvanhov...@databricks.com>
Date:   2016-10-19T02:16:33Z

    Fix unqualified catalog.getFunction

----


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