-- -- acs_object__get_attr_storage_column/1 -- create or replace function acs_object__get_attr_storage_column( text ) returns text as $$ declare v_vals alias for $1; v_idx integer; begin v_idx := strpos(v_vals,','); if v_idx = 0 or v_vals is null then raise exception 'invalid storage format: acs_object.get_attr_storage_column %',v_vals; end if; return substr(v_vals,1,v_idx - 1); end;$$ language plpgsql;