add test cases and update code style

sql/core/src/main/scala/org/apache/spark/sql/execution/command/commands.scala

@@ -446,10 +446,8 @@ case class SetDatabaseCommand(databaseName: String) extends RunnableCommand {
   * }}}
   */
 case class CreateFunction(
-                           functionName: String,
-                           alias: String,
-                           resources: Seq[(String, String)],
-                           isTemp: Boolean)(sql: String) extends RunnableCommand {
+    functionName: String, alias: String, resources: Seq[(String, String)],
+    isTemp: Boolean)(sql: String) extends RunnableCommand {
   override def run(sqlContext: SQLContext): Seq[Row] = {
     val catalog = sqlContext.sessionState.catalog
     val functionIdentifier = FunctionIdentifier(functionName, Some(catalog.getCurrentDatabase))
@@ -458,4 +456,4 @@ case class CreateFunction(
   }
 
   override val output: Seq[Attribute] = Seq.empty
-}
+}

sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala

@@ -21,10 +21,13 @@ import java.math.MathContext
 import java.sql.Timestamp
 
 import org.apache.spark.AccumulatorSuite
+import org.apache.spark.sql.catalyst.FunctionIdentifier
 import org.apache.spark.sql.catalyst.analysis.UnresolvedException
+import org.apache.spark.sql.catalyst.catalog.CatalogFunction
 import org.apache.spark.sql.catalyst.expressions.SortOrder
 import org.apache.spark.sql.catalyst.plans.logical.Aggregate
 import org.apache.spark.sql.execution.aggregate
+import org.apache.spark.sql.execution.command.CreateFunction
 import org.apache.spark.sql.execution.joins.{BroadcastHashJoin, CartesianProduct, SortMergeJoin}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.internal.SQLConf
@@ -2376,4 +2379,30 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
           Row("r3c1x", "r3c2", "t1r3c3", "r3c2", "t1r3c3") :: Nil)
     }
   }
+
+  test("SPARK-14123") {
+    val sql1 =
+      """
+        |CREATE TEMPORARY FUNCTION helloworld1 AS
+        |'spark.example.SimpleUDFExample1' USING JAR '/path/to/jar1',
+        |JAR '/path/to/jar2'
+      """.stripMargin
+    val sql2 =
+      """
+        |CREATE FUNCTION helloworld2 AS
+        |'spark.example.SimpleUDFExample2' USING ARCHIVE '/path/to/archive',
+        |FILE '/path/to/file'
+      """.stripMargin
+    sql(sql1)
+    sql(sql2)
+
+    val catalog = sqlContext.sessionState.catalog
+    val id1 = FunctionIdentifier("helloworld1", Some(catalog.getCurrentDatabase))
+    val id2 = FunctionIdentifier("helloworld2", Some(catalog.getCurrentDatabase))
+
+    val f1 = catalog.getFunction(id1)
+    val f2 = catalog.getFunction(id2)
+    assert(f1 == CatalogFunction(id1, "spark.example.SimpleUDFExample1"))
+    assert(f2 == CatalogFunction(id2, "spark.example.SimpleUDFExample2"))
+  }
 }