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https://issues.apache.org/jira/browse/FLINK-7243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16691989#comment-16691989
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ASF GitHub Bot commented on FLINK-7243:
---------------------------------------
fhueske commented on a change in pull request #6483:
[FLINK-7243][flink-formats] Add parquet input format
URL: https://github.com/apache/flink/pull/6483#discussion_r234624331
##########
File path:
flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/utils/ParquetRecordReader.java
##########
@@ -0,0 +1,221 @@
+/*
+ * 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.flink.formats.parquet.utils;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.parquet.column.page.PageReadStore;
+import org.apache.parquet.filter2.compat.FilterCompat;
+import org.apache.parquet.filter2.compat.FilterCompat.Filter;
+import org.apache.parquet.hadoop.ParquetFileReader;
+import org.apache.parquet.hadoop.api.InitContext;
+import org.apache.parquet.hadoop.api.ReadSupport;
+import org.apache.parquet.hadoop.metadata.BlockMetaData;
+import org.apache.parquet.hadoop.metadata.FileMetaData;
+import org.apache.parquet.io.ColumnIOFactory;
+import org.apache.parquet.io.MessageColumnIO;
+import org.apache.parquet.io.RecordReader;
+import org.apache.parquet.io.api.RecordMaterializer;
+import
org.apache.parquet.io.api.RecordMaterializer.RecordMaterializationException;
+import org.apache.parquet.schema.MessageType;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.annotation.CheckReturnValue;
+import javax.annotation.meta.When;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+
+import static org.apache.flink.util.Preconditions.checkNotNull;
+
+/**
+ * Customized {@link org.apache.parquet.hadoop.ParquetRecordReader} that
support start read from particular position.
+ */
+public class ParquetRecordReader<T> {
+ private static final Logger LOG =
LoggerFactory.getLogger(ParquetRecordReader.class);
+
+ private ColumnIOFactory columnIOFactory;
+ private Filter filter;
+ private MessageType readSchema;
+ private MessageType fileSchema;
+ private ReadSupport<T> readSupport;
+
+ // Parquet Materializer convert record to T
+ private RecordMaterializer<T> recordMaterializer;
+ private T currentValue;
+ private long total;
+ private long current = 0;
+ private int currentBlock = -1;
+ private ParquetFileReader reader;
+ private RecordReader<T> recordReader;
+ private boolean strictTypeChecking = true;
+ private boolean skipCorruptedRecord = true;
+ private long countLoadUntilLastGroup = 0;
+ private long totalCountLoadedSoFar = 0;
+
+ public ParquetRecordReader(ReadSupport<T> readSupport, MessageType
readSchema, Filter filter) {
Review comment:
Can you order the public methods (roughly) according to the lifecycle of the
object?
* steSkipCorruptedRecord
* initialize
* seek
* reachEnd
* hasNextRecord
* nextRecrod
* getCurrentBlock
* getRecordInCurrentBlock
* close
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> Add ParquetInputFormat
> ----------------------
>
> Key: FLINK-7243
> URL: https://issues.apache.org/jira/browse/FLINK-7243
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: godfrey he
> Assignee: Zhenqiu Huang
> Priority: Major
> Labels: pull-request-available
>
> Add a {{ParquetInputFormat}} to read data from a Apache Parquet file.
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