.. _program_listing_file__tmp_ws_src_rosbag2_rosbag2_storage_default_plugins_include_rosbag2_storage_default_plugins_sqlite_sqlite_pragmas.hpp:

Program Listing for File sqlite_pragmas.hpp
===========================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_rosbag2_rosbag2_storage_default_plugins_include_rosbag2_storage_default_plugins_sqlite_sqlite_pragmas.hpp>` (``/tmp/ws/src/rosbag2/rosbag2_storage_default_plugins/include/rosbag2_storage_default_plugins/sqlite/sqlite_pragmas.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2020, Robotec.ai sp. z o.o.
   //
   // Licensed 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.
   
   #ifndef ROSBAG2_STORAGE_DEFAULT_PLUGINS__SQLITE__SQLITE_PRAGMAS_HPP_
   #define ROSBAG2_STORAGE_DEFAULT_PLUGINS__SQLITE__SQLITE_PRAGMAS_HPP_
   
   #include <memory>
   #include <string>
   #include <unordered_map>
   #include <vector>
   
   
   namespace rosbag2_storage_plugins
   {
   
   class ROSBAG2_STORAGE_DEFAULT_PLUGINS_PUBLIC SqlitePragmas
   {
   public:
     using pragmas_map_t = std::unordered_map<std::string, std::string>;
   
     static pragmas_map_t default_pragmas()
     {
       static pragmas_map_t p = {{"schema_version", "PRAGMA schema_version;"}};
       return p;
     }
   
     // more robust storage settings will cause performace hit on writing,
     // but increase resistance to bagfile data corruption in case of crashes
     static pragmas_map_t robust_writing_pragmas()
     {
       static pragmas_map_t p = {
         {"journal_mode", "PRAGMA journal_mode=WAL;"},
         {"synchronous", "PRAGMA synchronous=NORMAL;"}
       };
       return p;
     }
   
     static pragmas_map_t optimized_writing_pragmas()
     {
       static pragmas_map_t p = {
         {"journal_mode", "PRAGMA journal_mode=MEMORY;"},
         {"synchronous", "PRAGMA synchronous=OFF;"}
       };
       return p;
     }
   };
   
   }  // namespace rosbag2_storage_plugins
   
   #endif  // ROSBAG2_STORAGE_DEFAULT_PLUGINS__SQLITE__SQLITE_PRAGMAS_HPP_