Github user ravipesala commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2642#discussion_r213688091
--- Diff:
integration/spark-datasource/src/main/spark2.1/org/apache/spark/sql/CarbonVectorProxy.java
---
@@ -0,0 +1,272 @@
+/*
+ * 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;
+
+import java.math.BigInteger;
+
+import org.apache.parquet.column.Dictionary;
+import org.apache.spark.memory.MemoryMode;
+import org.apache.spark.sql.catalyst.InternalRow;
+import org.apache.spark.sql.execution.vectorized.ColumnarBatch;
+import org.apache.spark.sql.execution.vectorized.ColumnVector;
+import org.apache.spark.sql.types.CalendarIntervalType;
+import org.apache.spark.sql.types.DataType;
+import org.apache.spark.sql.types.Decimal;
+import org.apache.spark.sql.types.DecimalType;
+import org.apache.spark.sql.types.StructField;
+import org.apache.spark.sql.types.StructType;
+import org.apache.spark.unsafe.types.CalendarInterval;
+import org.apache.spark.unsafe.types.UTF8String;
+
+/**
+ * Adapter class which handles the columnar vector reading of the
carbondata
+ * based on the spark ColumnVector and ColumnarBatch API. This proxy class
+ * handles the complexity of spark 2.1 version related api changes since
+ * spark ColumnVector and ColumnarBatch interfaces are still evolving.
+ */
+public class CarbonVectorProxy {
--- End diff --
2.1 and 2.2 should have same
---
