GitHub user yhuai opened a pull request:
https://github.com/apache/spark/pull/12424
[SPARK-14668] [SQL] Move CurrentDatabase to sql/core
## What changes were proposed in this pull request?
This PR moves `CurrentDatabase` from sql/hive package to sql/core. It also
adds the function description, which looks like the following.
```
scala> sqlContext.sql("describe function extended
current_database").collect.foreach(println)
[Function: current_database]
[Class: org.apache.spark.sql.execution.command.CurrentDatabase]
[Usage: current_database() - Returns the current database.]
[Extended Usage:
> SELECT current_database()]
```
## How was this patch tested?
Existing tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yhuai/spark SPARK-14668
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12424.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 #12424
----
commit 7b01fd3045b3c226cbf7ac530b5773de5594f3e4
Author: Yin Huai <[email protected]>
Date: 2016-04-15T20:15:39Z
[SPARK-14668] [SQL] Move CurrentDatabase to sql/core
----
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