[SPARK-13526][SQL] Move SQLContext per-session states to new class

## What changes were proposed in this pull request?

This creates a `SessionState`, which groups a few fields that existed in `SQLContext`. Because `HiveContext` extends `SQLContext` we also need to make changes there. This is mainly a cleanup task that will soon pave the way for merging the two contexts.

## How was this patch tested?

Existing unit tests; this patch introduces no change in behavior.

Author: Andrew Or <andrew@databricks.com>

Closes #11405 from andrewor14/refactor-session.

1 files changed, 6 insertions, 1 deletions

diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 165280a1b2..9ce37fc753 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -271,13 +271,18 @@ object MimaExcludes {
       ) ++ Seq(
         // SPARK-13220 Deprecate yarn-client and yarn-cluster mode
         ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.SparkContext.org$apache$spark$SparkContext$$createTaskScheduler"),
+          "org.apache.spark.SparkContext.org$apache$spark$SparkContext$$createTaskScheduler")
+      ) ++ Seq(
         // SPARK-13465 TaskContext.
         ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.TaskContext.addTaskFailureListener")
       ) ++ Seq (
         // SPARK-7729 Executor which has been killed should also be displayed on Executor Tab
         ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.status.api.v1.ExecutorSummary.this")
       ) ++ Seq(
+        // SPARK-13526 Move SQLContext per-session states to new class
+        ProblemFilters.exclude[IncompatibleMethTypeProblem](
+          "org.apache.spark.sql.UDFRegistration.this")
+      ) ++ Seq(
         // [SPARK-13486][SQL] Move SQLConf into an internal package
         ProblemFilters.exclude[MissingClassProblem]("org.apache.spark.sql.SQLConf"),
         ProblemFilters.exclude[MissingClassProblem]("org.apache.spark.sql.SQLConf$SQLConfEntry"),