code: def get_var(self, key):
      'Retrieve one saved variable from the database.'
      vt = quote(self.__vars_table)
      data = self.execute(u'SELECT * FROM %s WHERE `key` = ?' % vt, [key], commit = False)
      if data == []:
        raise NameError(u'The DumpTruck variables table doesn\'t have a value for %s.' % key)
      else:
        tmp = quote(self.__vars_table_tmp)
        row = data[0]
  
        self.execute(u'DROP TABLE IF EXISTS %s' % tmp, commit = False)
  
        # This is vulnerable to injection
        self.execute(u'CREATE TEMPORARY TABLE %s (`value` %s)' % (tmp, row['type']), commit = False)
  
        # This is ugly
        self.execute(u'INSERT INTO %s (`value`) VALUES (?)' % tmp, [row['value']], commit = False)
        value = self.dump(tmp)[0]['value']
        self.execute(u'DROP TABLE %s' % tmp, commit = False)
  
        return valuf get_var(self, key):
      'Retrieve one saved variable from the database.'
      vt = quote(self.__vars_table)
      data = self.execute(u'SELECT * FROM %s WHERE `key` = ?' % vt, [key], commit = False)
      if data == []:
        raise NameError(u'The DumpTruck variables table doesn\'t have a value for %s.' % key)
      else:
        tmp = quote(self.__vars_table_tmp)
        row = data[0]
  
        self.execute(u'DROP TABLE IF EXISTS %s' % tmp, commit = False)
  
        # This is vulnerable to injection
        self.execute(u'CREATE TEMPORARY TABLE %s (`value` %s)' % (tmp, row['type']), commit = False)
  
        # This is ugly
        self.execute(u'INSERT INTO %s (`value`) VALUES (?)' % tmp, [row['value']], commit = False)
        value = self.dump(tmp)[0]['value']
        self.execute(u'DROP TABLE %s' % tmp, commit = False)
  
        return value
docs: Retrieve one saved variable from the database.