[SPARK-5166][SPARK-5247][SPARK-5258][SQL] API Cleanup / Documentation

Author: Michael Armbrust <michael@databricks.com>

Closes #4642 from marmbrus/docs and squashes the following commits:

d291c34 [Michael Armbrust] python tests
9be66e3 [Michael Armbrust] comments
d56afc2 [Michael Armbrust] fix style
f004747 [Michael Armbrust] fix build
c4a907b [Michael Armbrust] fix tests
42e2b73 [Michael Armbrust] [SQL] Documentation / API Clean-up.

1 files changed, 7 insertions, 2 deletions

diff --git a/sql/hive/v0.12.0/src/main/scala/org/apache/spark/sql/hive/Shim12.scala b/sql/hive/v0.12.0/src/main/scala/org/apache/spark/sql/hive/Shim12.scala
index 8534c7d706..30646ddbc2 100644
--- a/sql/hive/v0.12.0/src/main/scala/org/apache/spark/sql/hive/Shim12.scala
+++ b/sql/hive/v0.12.0/src/main/scala/org/apache/spark/sql/hive/Shim12.scala
@@ -43,7 +43,9 @@ import org.apache.hadoop.mapred.InputFormat
 
 import org.apache.spark.sql.types.{Decimal, DecimalType}
 
-case class HiveFunctionWrapper(functionClassName: String) extends java.io.Serializable {
+private[hive] case class HiveFunctionWrapper(functionClassName: String)
+  extends java.io.Serializable {
+
   // for Serialization
   def this() = this(null)
 
@@ -249,6 +251,9 @@ private[hive] object HiveShim {
   def setTblNullFormat(crtTbl: CreateTableDesc, tbl: Table) = {}
 }
 
-class ShimFileSinkDesc(var dir: String, var tableInfo: TableDesc, var compressed: Boolean)
+private[hive] class ShimFileSinkDesc(
+    var dir: String,
+    var tableInfo: TableDesc,
+    var compressed: Boolean)
   extends FileSinkDesc(dir, tableInfo, compressed) {
 }