Github user shivzone commented on a diff in the pull request: https://github.com/apache/incubator-hawq/pull/1326#discussion_r159298493 --- Diff: pxf/pxf-hdfs/src/main/java/org/apache/hawq/pxf/plugins/hdfs/ParquetFileAccessor.java --- @@ -0,0 +1,168 @@ +package org.apache.hawq.pxf.plugins.hdfs; + +/* + * 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. + */ + +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.mapred.FileSplit; +import org.apache.hawq.pxf.api.OneRow; +import org.apache.hawq.pxf.api.ReadAccessor; +import org.apache.hawq.pxf.api.utilities.InputData; +import org.apache.hawq.pxf.api.utilities.Plugin; +import org.apache.hawq.pxf.plugins.hdfs.utilities.HdfsUtilities; + +import org.apache.parquet.column.page.PageReadStore; +import org.apache.parquet.example.data.Group; +import org.apache.parquet.example.data.simple.convert.GroupRecordConverter; +import org.apache.parquet.format.converter.ParquetMetadataConverter; +import org.apache.parquet.hadoop.ParquetFileReader; +import org.apache.parquet.io.ColumnIOFactory; +import org.apache.parquet.io.MessageColumnIO; +import org.apache.parquet.io.RecordReader; +import org.apache.parquet.schema.MessageType; + +import java.io.IOException; +import java.util.Iterator; + +/** + * Parquet file accessor. --- End diff -- Also mention what exactly the accessor call returns (record or chunk etc)
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