$connected = AirtimeInstall::DbConnect(false);
 if ($connected) {
     echo " * Couldn't delete the database, so deleting all the DB tables..." . PHP_EOL;
     $con = Propel::getConnection();
     $sql = "select * from pg_tables where tableowner = 'airtime'";
     try {
         $rows = $con->query($sql)->fetchAll();
     } catch (Exception $e) {
         $rows = array();
     }
     foreach ($rows as $row) {
         $tablename = $row["tablename"];
         echo "   * Removing database table {$tablename}...";
         $sql = "DROP TABLE {$tablename} CASCADE";
         AirtimeInstall::InstallQuery($sql, false);
         AirtimeInstall::DropSequence($tablename . "_id");
         echo "done." . PHP_EOL;
     }
     echo " * Deleting database sequences..." . PHP_EOL;
     $sql = "SELECT c.relname FROM pg_class c WHERE c.relkind = 'S';";
     try {
         $rows = $con->query($sql)->fetchAll();
     } catch (Exception $e) {
         $rows = array();
     }
     foreach ($rows as $row) {
         $sequence = $row["relname"];
         echo "   * Removing database sequence {$sequence}...";
         $sql = "DROP SEQUENCE {$sequence} CASCADE";
         AirtimeInstall::InstallQuery($sql, false);
         echo "done." . PHP_EOL;