import quincy 17.2.0

[ceph.git] / ceph / src / arrow / cpp / tools / parquet / parquet_reader.cc

diff --git a/ceph/src/arrow/cpp/tools/parquet/parquet_reader.cc b/ceph/src/arrow/cpp/tools/parquet/parquet_reader.cc
new file mode 100644 (file)
index 0000000..c7db8e1
--- /dev/null
+++ b/ceph/src/arrow/cpp/tools/parquet/parquet_reader.cc
@@ -0,0 +1,82 @@
+// 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;
+}