// Boost.Geometry (aka GGL, Generic Geometry Library) // // Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands. // Use, modification and distribution is subject to the Boost Software License, // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // SOCI example // a: using boost::tuple to retrieve points // SOCI is a generic C++ template interface to access relational databases // To build and run this example: // 1) download SOCI from http://soci.sourceforge.net/ // 2) put it in contrib/soci-3.0.0 (or another version/folder, but then update this VCPROJ) // 3) adapt your makefile or use this VCPROJ file // (note that SOCI sources are included directly, building SOCI is not necessary) // 4) load the demo-data, see script data/cities.sql (for PostgreSQL) #include <soci.h> #include <soci-postgresql.h> #include <boost/algorithm/string.hpp> #include <boost/optional.hpp> #include <boost/timer.hpp> #include <boost/random.hpp> #include <boost/tuple/tuple.hpp> #include <iostream> #include <istream> #include <ostream> #include <sstream> #include <string> #include <exception> #include <boost/geometry/geometry.hpp> #include <boost/geometry/geometries/adapted/boost_tuple.hpp> #include <boost/geometry/domains/gis/io/wkt/wkt.hpp> BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian); int main() { try { soci::session sql(soci::postgresql, "dbname=ggl user=ggl password=ggl"); int count; sql << "select count(*) from cities", soci::into(count); std::cout << "# Capitals: " << count << std::endl; typedef std::vector<boost::tuple<double, double> > V; soci::rowset<boost::tuple<double, double> > rows = sql.prepare << "select x(location),y(location) from cities"; V vec; std::copy(rows.begin(), rows.end(), std::back_inserter(vec)); for (V::const_iterator it = vec.begin(); it != vec.end(); ++it) { std::cout << it->get<0>() << " " << it->get<1>() << std::endl; } // Calculate distances for (V::const_iterator it1 = vec.begin(); it1 != vec.end(); ++it1) { for (V::const_iterator it2 = vec.begin(); it2 != vec.end(); ++it2) { std::cout << boost::geometry::dsv(*it1) << " " << boost::geometry::distance(*it1, *it2) << std::endl; } } } catch (std::exception const &e) { std::cerr << "Error: " << e.what() << '\n'; } return 0; }