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