4 files changed, 248 insertions, 0 deletions
diff --git a/src/arrow/cpp/tools/parquet/CMakeLists.txt b/src/arrow/cpp/tools/parquet/CMakeLists.txt
new file mode 100644
index 000000000..81ab49421
--- /dev/null
+++ b/src/arrow/cpp/tools/parquet/CMakeLists.txt
@@ -0,0 +1,36 @@
+# 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.
+
+if(PARQUET_BUILD_EXECUTABLES)
+  set(PARQUET_TOOLS parquet-dump-schema parquet-reader parquet-scan)
+
+  foreach(TOOL ${PARQUET_TOOLS})
+    string(REGEX REPLACE "-" "_" TOOL_SOURCE ${TOOL})
+    add_executable(${TOOL} "${TOOL_SOURCE}.cc")
+    if(ARROW_BUILD_SHARED)
+      target_link_libraries(${TOOL} parquet_shared)
+    else()
+      target_link_libraries(${TOOL} parquet_static)
+    endif()
+    # Avoid unsetting RPATH when installing
+    set_target_properties(${TOOL} PROPERTIES INSTALL_RPATH_USE_LINK_PATH TRUE)
+    install(TARGETS ${TOOL} ${INSTALL_IS_OPTIONAL}
+            RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+  endforeach(TOOL)
+
+  add_dependencies(parquet ${PARQUET_TOOLS})
+endif()
diff --git a/src/arrow/cpp/tools/parquet/parquet_dump_schema.cc b/src/arrow/cpp/tools/parquet/parquet_dump_schema.cc
new file mode 100644
index 000000000..0d7c2428f
--- /dev/null
+++ b/src/arrow/cpp/tools/parquet/parquet_dump_schema.cc
@@ -0,0 +1,52 @@
+// 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 "parquet/api/reader.h"
+#include "parquet/api/schema.h"
+
+int main(int argc, char** argv) {
+  bool help_flag = false;
+  std::string filename;
+
+  for (int i = 1; i < argc; i++) {
+    if (!std::strcmp(argv[i], "-?") || !std::strcmp(argv[i], "-h") ||
+        !std::strcmp(argv[i], "--help")) {
+      help_flag = true;
+    } else {
+      filename = argv[i];
+    }
+  }
+
+  if (argc != 2 || help_flag) {
+    std::cerr << "Usage: parquet-dump-schema [-h] [--help]"
+              << " <filename>" << std::endl;
+    return -1;
+  }
+
+  try {
+    std::unique_ptr<parquet::ParquetFileReader> reader =
+        parquet::ParquetFileReader::OpenFile(filename);
+    PrintSchema(reader->metadata()->schema()->schema_root().get(), std::cout);
+  } catch (const std::exception& e) {
+    std::cerr << "Parquet error: " << e.what() << std::endl;
+    return -1;
+  }
+
+  return 0;
+}
diff --git a/src/arrow/cpp/tools/parquet/parquet_reader.cc b/src/arrow/cpp/tools/parquet/parquet_reader.cc
new file mode 100644
index 000000000..c7db8e11a
--- /dev/null
+++ b/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;
+}
diff --git a/src/arrow/cpp/tools/parquet/parquet_scan.cc b/src/arrow/cpp/tools/parquet/parquet_scan.cc
new file mode 100644
index 000000000..2a7721e58
--- /dev/null
+++ b/src/arrow/cpp/tools/parquet/parquet_scan.cc
@@ -0,0 +1,78 @@
+// 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 <ctime>
+#include <iostream>
+#include <list>
+#include <memory>
+
+#include "parquet/api/reader.h"
+
+int main(int argc, char** argv) {
+  if (argc > 4 || argc < 1) {
+    std::cerr << "Usage: parquet-scan [--batch-size=] [--columns=...] <file>"
+              << std::endl;
+    return -1;
+  }
+
+  std::string filename;
+
+  // Read command-line options
+  int batch_size = 256;
+  const std::string COLUMNS_PREFIX = "--columns=";
+  const std::string BATCH_SIZE_PREFIX = "--batch-size=";
+  std::vector<int> columns;
+  int num_columns = 0;
+
+  char *param, *value;
+  for (int i = 1; i < argc; i++) {
+    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, ",");
+        num_columns++;
+      }
+    } else if ((param = std::strstr(argv[i], BATCH_SIZE_PREFIX.c_str()))) {
+      value = std::strtok(param + BATCH_SIZE_PREFIX.length(), " ");
+      if (value) {
+        batch_size = std::atoi(value);
+      }
+    } else {
+      filename = argv[i];
+    }
+  }
+
+  try {
+    double total_time;
+    std::clock_t start_time = std::clock();
+    std::unique_ptr<parquet::ParquetFileReader> reader =
+        parquet::ParquetFileReader::OpenFile(filename);
+
+    int64_t total_rows = parquet::ScanFileContents(columns, batch_size, reader.get());
+
+    total_time = static_cast<double>(std::clock() - start_time) /
+                 static_cast<double>(CLOCKS_PER_SEC);
+    std::cout << total_rows << " rows scanned in " << total_time << " seconds."
+              << std::endl;
+  } catch (const std::exception& e) {
+    std::cerr << "Parquet error: " << e.what() << std::endl;
+    return -1;
+  }
+
+  return 0;
+}