takes the list of columns as a string (via SELECT statement in DB)
        and produces a lst of columns

def get_column_list_from_select(self, txt, col_delim=','):
        """ 
        takes the list of columns as a string (via SELECT statement in DB)
        and produces a lst of columns
        """
        return [c.strip().strip(',') for c in txt.split(col_delim)]