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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
// "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.
#include <iostream>
#include <list>
#include <memory>
#include "parquet/api/reader.h"
int main(int argc, char** argv) {
if (argc > 5 || argc < 2) {
std::cerr << "Usage: parquet-reader [--only-metadata] [--no-memory-map] [--json] "
<< "[--dump] [--print-key-value-metadata] [--columns=...] <file>"
<< std::endl;
return -1;
}
std::string filename;
bool print_values = true;
bool print_key_value_metadata = false;
bool memory_map = true;
bool format_json = false;
bool format_dump = false;
// Read command-line options
const std::string COLUMNS_PREFIX = "--columns=";
std::list<int> columns;
char *param, *value;
for (int i = 1; i < argc; i++) {
if ((param = std::strstr(argv[i], "--only-metadata"))) {
print_values = false;
} else if ((param = std::strstr(argv[i], "--print-key-value-metadata"))) {
print_key_value_metadata = true;
} else if ((param = std::strstr(argv[i], "--no-memory-map"))) {
memory_map = false;
} else if ((param = std::strstr(argv[i], "--json"))) {
format_json = true;
} else if ((param = std::strstr(argv[i], "--dump"))) {
format_dump = true;
} else if ((param = std::strstr(argv[i], COLUMNS_PREFIX.c_str()))) {
value = std::strtok(param + COLUMNS_PREFIX.length(), ",");
while (value) {
columns.push_back(std::atoi(value));
value = std::strtok(nullptr, ",");
}
} else {
filename = argv[i];
}
}
try {
std::unique_ptr<parquet::ParquetFileReader> reader =
parquet::ParquetFileReader::OpenFile(filename, memory_map);
parquet::ParquetFilePrinter printer(reader.get());
if (format_json) {
printer.JSONPrint(std::cout, columns, filename.c_str());
} else {
printer.DebugPrint(std::cout, columns, print_values, format_dump,
print_key_value_metadata, filename.c_str());
}
} catch (const std::exception& e) {
std::cerr << "Parquet error: " << e.what() << std::endl;
return -1;
}
return 0;
}
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