void DynDBDriver
::TracksSnapshot::Transactor::operator()(pqxx::work& transaction)
{
for (const DynDBDriver::Track_row& track : tracks_)
{
const std::string sql = "INSERT INTO track_snapshots "
"(snapshot_id,track_id,lon,lat,meters_over_sea,"
"lon_velocity,lat_velocity,meters_over_sea_velocity,"
"predicted_lon,predicted_lat,predicted_meters_over_sea,"
"refresh_time) "
"VALUES("
+ pqxx::to_string(snapshotId_) + ",'"
+ pqxx::to_string(Track_row::uuidToString(track.uuid)) + "',"
+ pqxx::to_string(track.lon) + ","
+ pqxx::to_string(track.lat) + ","
+ pqxx::to_string(track.mos) + ","
+ pqxx::to_string(track.lonVelocity) + ","
+ pqxx::to_string(track.latVelocity) + ","
+ pqxx::to_string(track.mosVelocity) + ","
+ pqxx::to_string(track.predictedLon) + ","
+ pqxx::to_string(track.predictedLat) + ","
+ pqxx::to_string(track.predictedMos) + ","
+ "to_timestamp(" + pqxx::to_string(track.refreshTime) + "))";
transaction.exec(sql);
}
transaction.commit();
}
int
DSCStrategy::get_plot_id(const string& plot, pqxx::work& pg_db_trans) {
stringstream sql;
pqxx::result r;
try {
sql.clear();
sql.str("");
sql << "SELECT id FROM dsc.dataset WHERE name = '" << plot << "'" << endl;
r = pg_db_trans.exec(sql.str());
if ( r.size() != 1 ) {
cerr << "Error: Expected 1 plot with name " << plot << ", "
<< "but found " << r.size() << endl;
exit( EXIT_FAILURE );
}
}
catch( runtime_error & e )
{
cerr << "Runtime error: " << e.what() << endl;
exit( EXIT_FAILURE );
}
catch( std::exception & e )
{
cerr << "Exception: " << e.what() << sql.str() << endl;
exit( EXIT_FAILURE );
}
catch( ... )
{
cerr << "Unknown exception caught" << endl;
exit( EXIT_FAILURE );
}
return r[0][0].as<int>();
}
tmp_nodes::tmp_nodes(pqxx::work &w, const int rid)
: work(w) {
// hack around problem with postgres' statistics, which was
// making it do seq scans all the time on smaug...
w.exec("set enable_mergejoin=false");
w.exec("set enable_hashjoin=false");
stringstream query;
query << "create temporary table tmp_nodes as "
<< "select distinct(member_id) as id from current_relation_members where member_type = 'Node' and id = " << rid;
logger::message("Creating tmp_nodes");
// assume this throws if it fails?
work.exec(query);
}
/// Perform the transaction itself
void operator ()(pqxx::work & t)
{
// Setup wci:
t.exec("SELECT wci.begin( 'wcitest', 999, 999, 999 )");
// Request BLOB oid:
const pqxx::result result = t.exec(myQuery);
// Fetch each BLOB, and store it in the return object
for (pqxx::result::const_iterator it = result.begin(); it != result.end(); ++it )
{
const pqxx::result::field & f = (*it)["value"];
// Fetch the grid, remember to check for NULL
float value = std::numeric_limits<float>::quiet_NaN();
if ( not f.is_null() )
value = f.as<float>();
// Store data:
const std::string identifier = (*it)["validtimeto"].as<std::string>() + " - " + (*it)["valueparametername"].as<std::string>();
internalStorage_[identifier] = value;
}
}
