| // 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; |
| } |