docs: def _update_database_helper_table(
              self):
          """*Update the sherlock catalogues database helper table with the time-stamp of when this catlogue was last updated*
  
          **Usage:**
  
              .. code-block:: python 
  
                  self._update_database_helper_table()
          """
          self.log.debug('starting the ``_update_database_helper_table`` method')
  
          tableName = self.dbTableName
  
          sqlQuery = u"""
              update tcs_helper_catalogue_tables_info set last_updated = now() where table_name = "%(tableName)s";
          """ % locals()
  
          writequery(
              log=self.log,
              sqlQuery=sqlQuery,
              dbConn=self.cataloguesDbConn,
          )
  
          self.log.debug(
              'completed the ``_update_database_helper_table`` method')
          return None