Github user chenliang613 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1307#discussion_r137447980
--- Diff: integration/presto/src/main/java/org/apache/carbondata/presto/CarbonVectorizedRecordReader.java ---
@@ -0,0 +1,264 @@
+/*
+ * 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.carbondata.presto;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.carbondata.core.cache.dictionary.Dictionary;
+import org.apache.carbondata.core.datastore.block.TableBlockInfo;
+import org.apache.carbondata.core.keygenerator.directdictionary.DirectDictionaryGenerator;
+import org.apache.carbondata.core.keygenerator.directdictionary.DirectDictionaryKeyGeneratorFactory;
+import org.apache.carbondata.core.metadata.datatype.DataType;
+import org.apache.carbondata.core.metadata.encoder.Encoding;
+import org.apache.carbondata.core.scan.executor.QueryExecutor;
+import org.apache.carbondata.core.scan.executor.QueryExecutorFactory;
+import org.apache.carbondata.core.scan.executor.exception.QueryExecutionException;
+import org.apache.carbondata.core.scan.model.QueryDimension;
+import org.apache.carbondata.core.scan.model.QueryMeasure;
+import org.apache.carbondata.core.scan.model.QueryModel;
+import org.apache.carbondata.core.scan.result.iterator.AbstractDetailQueryResultIterator;
+import org.apache.carbondata.core.scan.result.vector.CarbonColumnVector;
+import org.apache.carbondata.core.scan.result.vector.CarbonColumnarBatch;
+import org.apache.carbondata.core.util.CarbonUtil;
+import org.apache.carbondata.hadoop.AbstractRecordReader;
+import org.apache.carbondata.hadoop.CarbonInputSplit;
+import org.apache.carbondata.hadoop.CarbonMultiBlockSplit;
+
+import org.apache.hadoop.mapreduce.InputSplit;
+import org.apache.hadoop.mapreduce.TaskAttemptContext;
+import org.apache.spark.memory.MemoryMode;
+import org.apache.spark.sql.execution.vectorized.ColumnarBatch;
+import org.apache.spark.sql.types.DecimalType;
+import org.apache.spark.sql.types.StructField;
+import org.apache.spark.sql.types.StructType;
+
+/**
+ * A specialized RecordReader that reads into InternalRows or ColumnarBatches directly using the
+ * carbondata column APIs and fills the data directly into columns.
+ */
+class CarbonVectorizedRecordReader extends AbstractRecordReader<Object> {
--- End diff --
Yes, we could consider the refactor as you suggested in 1.3.0.
@bhavya411 please add comment for this class , like "TODO: abstract and consolidate VectorizedRecordReader into one , and be shared for all integration modules"
---
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