| RDB 2

rdb-example-09-cleanup-database.cpp
/*
*******************************************************************************
*
* Copyright 2025 RIEGL Laser Measurement Systems
*
* 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
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* SPDX-License-Identifier: Apache-2.0
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*******************************************************************************
*/
/*!
*******************************************************************************
*
* \file rdb-example-09-cleanup-database.cpp
* \author RIEGL LMS GmbH, Austria
* \brief RDB example 9: Cleanup database
* \version 2017-01-30/AW: Initial version
* \version 2018-07-10/AW: Better error handling
*
* This example shows how to open an existing database and how to dismiss
* the database history, i.e. to delete all transactions except the first
* (database creation) and the current transaction (last committed or
* restored).
*
* Afterwards we vacuum the database which reorganizes the data blocks in
* the database file so that there are no (or as few as possible) unused
* blocks (gaps).
*
* Please note, that both database operations cannot be reverted!
*
* Build instructions see "interface/cpp/riegl/README.TXT".
*
*******************************************************************************
*/
#include <cstdint>
#include <iostream>
#include <exception>
#include <riegl/rdb.hpp>
int main()
{
try
{
// New RDB library context
riegl::rdb::Context context;
// Access existing database
riegl::rdb::Pointcloud rdb(context);
riegl::rdb::pointcloud::OpenSettings settings;
rdb.open("pointcloud.rdbx", settings);
// First we delete the history (see comments in header)
rdb.management().finalize();
//____________________________________________________________________//
// //
// At this point, there might be many unused data blocks in the //
// database file which were occupied by the transactions we have //
// just deleted. These data blocks will be re-used when we create //
// new transactions to insert, update or remove points or make //
// other changes to e.g. meta data items. //
// So the following vacuum step is optional but might be a good //
// idea before archiving or transferring the database file. //
//____________________________________________________________________//
// //
// Now we reorganize and shrink the database file:
rdb.management().vacuum(
[](const uint8_t progress)
{
// As this might be a lengthy operation, vacuum() accepts
// an optional callback function to notify the user about
// the (coarse) progress. However there is no function to
// cancel this process.
std::cout << "progress: " << int(progress) << "%" << std::endl;
}
);
// Success
return 0;
}
catch(const riegl::rdb::Error &error)
{
std::cerr << error.what() << " (" << error.details() << ")" << std::endl;
return 1; // error
}
catch(const std::exception &error)
{
std::cerr << error.what() << std::endl;
return 1; // error
}
}