Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/8909#discussion_r41424458
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala ---
@@ -410,7 +436,11 @@ class HiveContext(sc: SparkContext) extends
SQLContext(sc) with Logging {
// Note that HiveUDFs will be overridden by functions registered in this
context.
@transient
override protected[sql] lazy val functionRegistry: FunctionRegistry =
- new HiveFunctionRegistry(FunctionRegistry.builtin)
+ new HiveFunctionRegistry(FunctionRegistry.builtin.copy())
+
+ functionRegistry.registerFunction(
+ "current_database",
+ (expressions: Seq[Expression]) => new CurrentDatabase(this))
--- End diff --
This is a cute way to tie this to the session.
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