code: @Override
  	public int deleteById(TableColumnKey id) throws SQLException {
  		int count = 0;
  		if (id != null) {
  			GeometryColumnsSqlMm geometryColumns = queryForId(id);
  			if (geometryColumns != null) {
  				count = delete(geometryColumns);
  			}
  		}
  		return count;
  	}
docs: {@inheritDoc}