Github user jackylk commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2104#discussion_r177136802
--- Diff:
integration/spark2/src/main/scala/org/apache/spark/sql/hive/ICarbonSessionCatalog.scala
---
@@ -0,0 +1,59 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one or more
+* contributor license agreements. See the NOTICE file distributed with
+* this work for additional information regarding copyright ownership.
+* The ASF licenses this file to You under the Apache License, Version 2.0
+* (the "License"); you may not use this file except in compliance with
+* the License. You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+package org.apache.spark.sql.hive
+
+import org.apache.hadoop.fs.Path
+import org.apache.spark.sql.{CarbonEnv, SparkSession}
+import org.apache.spark.sql.catalyst.TableIdentifier
+import org.apache.spark.sql.catalyst.catalog.{CatalogStorageFormat,
CatalogTablePartition}
+import org.apache.spark.sql.catalyst.expressions.Expression
+
+/**
+ * trait to give contract to the CarbonSessionCatalog
+ */
+trait ICarbonSessionCatalog {
--- End diff --
annotate it with InterfaceAudience and InterfaceStability
---
