[jira] [Updated] (SPARK-16904) Removal of Hive Built-in Hash Functions and TestHiveFunctionRegistry

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

     [ https://issues.apache.org/jira/browse/SPARK-16904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin updated SPARK-16904:
--------------------------------
    Issue Type: Sub-task  (was: Bug)
        Parent: SPARK-15691

> Removal of Hive Built-in Hash Functions and TestHiveFunctionRegistry
> --------------------------------------------------------------------
>
>                 Key: SPARK-16904
>                 URL: https://issues.apache.org/jira/browse/SPARK-16904
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 2.0.0
>            Reporter: Xiao Li
>
> Currently, the Hive built-in `hash` function is not being used in Spark since Spark 2.0. The public interface does not allow users to unregister the Spark built-in functions. Thus, users will never use Hive's built-in `hash` function. 
> The only exception here is `TestHiveFunctionRegistry`, which allows users to unregister the built-in functions. Thus, we can load Hive's hash function in the test cases. If we disable it, 10+ test cases will fail because the results are different from the Hive golden answer files.
> This PR is to remove `hash` from the list of `hiveFunctions` in `HiveSessionCatalog`. It will also remove `TestHiveFunctionRegistry`. This removal makes us easier to remove `TestHiveSessionState` in the future.



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