org.apache.parquet.hadoop.util.ColumnPruner Maven / Gradle / Ivy
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* 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
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package org.apache.parquet.hadoop.util;
import java.io.IOException;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.parquet.hadoop.rewrite.ParquetRewriter;
import org.apache.parquet.hadoop.rewrite.RewriteOptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Deprecated
public class ColumnPruner {
private static final Logger LOG = LoggerFactory.getLogger(ColumnPruner.class);
public void pruneColumns(Configuration conf, Path inputFile, Path outputFile, List cols)
throws IOException {
RewriteOptions options = new RewriteOptions.Builder(conf, inputFile, outputFile)
.prune(cols)
.build();
ParquetRewriter rewriter = new ParquetRewriter(options);
rewriter.processBlocks();
rewriter.close();
}
}