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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (BEAM-214) Create Parquet IO
Date Wed, 23 May 2018 10:49:00 GMT

     [ https://issues.apache.org/jira/browse/BEAM-214?focusedWorklogId=105052&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-105052
]

ASF GitHub Bot logged work on BEAM-214:
---------------------------------------

                Author: ASF GitHub Bot
            Created on: 23/May/18 10:48
            Start Date: 23/May/18 10:48
    Worklog Time Spent: 10m 
      Work Description: lgajowy commented on a change in pull request #5242: [BEAM-214] ParquetIO
URL: https://github.com/apache/beam/pull/5242#discussion_r190202171
 
 

 ##########
 File path: sdks/java/io/parquet/src/main/java/org/apache/beam/sdk/io/parquet/ParquetIO.java
 ##########
 @@ -0,0 +1,371 @@
+/*
+ * 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.beam.sdk.io.parquet;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.apache.parquet.hadoop.ParquetFileWriter.Mode.OVERWRITE;
+
+import com.google.auto.value.AutoValue;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.channels.Channels;
+import java.nio.channels.SeekableByteChannel;
+import java.nio.channels.WritableByteChannel;
+import javax.annotation.Nullable;
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericRecord;
+import org.apache.beam.sdk.annotations.Experimental;
+import org.apache.beam.sdk.coders.AvroCoder;
+import org.apache.beam.sdk.coders.StringUtf8Coder;
+import org.apache.beam.sdk.io.FileIO;
+import org.apache.beam.sdk.options.ValueProvider;
+import org.apache.beam.sdk.transforms.Create;
+import org.apache.beam.sdk.transforms.DoFn;
+import org.apache.beam.sdk.transforms.PTransform;
+import org.apache.beam.sdk.transforms.ParDo;
+import org.apache.beam.sdk.transforms.display.DisplayData;
+import org.apache.beam.sdk.values.PBegin;
+import org.apache.beam.sdk.values.PCollection;
+import org.apache.parquet.avro.AvroParquetReader;
+import org.apache.parquet.avro.AvroParquetWriter;
+import org.apache.parquet.hadoop.ParquetReader;
+import org.apache.parquet.hadoop.ParquetWriter;
+import org.apache.parquet.io.DelegatingSeekableInputStream;
+import org.apache.parquet.io.InputFile;
+import org.apache.parquet.io.OutputFile;
+import org.apache.parquet.io.PositionOutputStream;
+import org.apache.parquet.io.SeekableInputStream;
+
+/**
+ * IO to read and write Parquet files.
+ *
+ * <h3>Reading Parquet files</h3>
+ *
+ * <p>{@link ParquetIO} source returns a {@link PCollection} for
+ * Parquet files. The elements in the {@link PCollection} are Avro {@link GenericRecord}.
+ *
+ * <p>To configure the {@link Read}, you have to provide the file patterns (from) of
the
+ * Parquet files and the coder.
+ *
+ * <p>For example:
+ *
+ * <pre>{@code
+ *  pipeline.apply(ParquetIO.read(SCHEMA).from("/foo/bar"));
 
 Review comment:
   ok

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 105052)
    Time Spent: 14h  (was: 13h 50m)

> Create Parquet IO
> -----------------
>
>                 Key: BEAM-214
>                 URL: https://issues.apache.org/jira/browse/BEAM-214
>             Project: Beam
>          Issue Type: Improvement
>          Components: io-ideas
>            Reporter: Neville Li
>            Assignee: Jean-Baptiste Onofré
>            Priority: Minor
>          Time Spent: 14h
>  Remaining Estimate: 0h
>
> Would be nice to support Parquet files with projection and predicates.



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