Github user anubhav100 commented on a diff in the pull request: https://github.com/apache/carbondata/pull/1257#discussion_r134219416 --- Diff: integration/presto/src/main/java/org/apache/carbondata/presto/processor/AbstractDataBlockIterator.java --- @@ -0,0 +1,239 @@ +/* + * 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.processor; + +import java.io.IOException; +import java.util.List; +import java.util.concurrent.Callable; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Future; +import java.util.concurrent.atomic.AtomicBoolean; + +import org.apache.carbondata.common.CarbonIterator; +import org.apache.carbondata.common.logging.LogService; +import org.apache.carbondata.common.logging.LogServiceFactory; +import org.apache.carbondata.core.datastore.DataRefNode; +import org.apache.carbondata.core.datastore.FileHolder; +import org.apache.carbondata.presto.scan.collector.ResultCollectorFactory; +import org.apache.carbondata.core.scan.collector.ScannedResultCollector; +import org.apache.carbondata.core.scan.executor.infos.BlockExecutionInfo; +import org.apache.carbondata.core.scan.processor.BlockletIterator; +import org.apache.carbondata.core.scan.processor.BlocksChunkHolder; +import org.apache.carbondata.core.scan.result.AbstractScannedResult; +import org.apache.carbondata.core.scan.result.vector.CarbonColumnarBatch; +import org.apache.carbondata.core.scan.scanner.BlockletScanner; +import org.apache.carbondata.core.scan.scanner.impl.FilterScanner; +import org.apache.carbondata.core.scan.scanner.impl.NonFilterScanner; +import org.apache.carbondata.core.stats.QueryStatisticsModel; + +/** + * This abstract class provides a skeletal implementation of the + * Block iterator. + */ +public abstract class AbstractDataBlockIterator extends CarbonIterator<List<Object[]>> { --- End diff -- only extending the core abstractdatatblockiterator will not solve our problem,if i extend it then it will pick up result collector from core module that is row based result collector which was initilized in its constructor
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