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From chenliang613 <>
Subject [GitHub] carbondata pull request #1257: [CARBONDATA-1347] Implemented Columnar Readin...
Date Sat, 19 Aug 2017 03:32:32 GMT
Github user chenliang613 commented on a diff in the pull request:
    --- Diff: integration/presto/src/main/java/org/apache/carbondata/presto/processor/
    @@ -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
    + *
    + *
    + *
    + * 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.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 --
    why need copy this class to presto module, can't directly use :  core/scan/processor/

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