-- -- sp_folders_update_tr/0 -- create or replace function sp_folders_update_tr( ) returns trigger as $$ declare v_parent_sk varbit default null; v_max_value integer; v_rec record; clr_keys_p boolean default 't'; begin if new.folder_id = old.folder_id and ((new.parent_id = old.parent_id) or (new.parent_id is null and old.parent_id is null)) then return new; end if; for v_rec in select folder_id, parent_id from sp_folders where tree_sortkey between new.tree_sortkey and tree_right(new.tree_sortkey) order by tree_sortkey LOOP if clr_keys_p then update sp_folders set tree_sortkey = null where tree_sortkey between new.tree_sortkey and tree_right(new.tree_sortkey); clr_keys_p := 'f'; end if; select max(tree_leaf_key_to_int(tree_sortkey)) into v_max_value from sp_folders where parent_id = v_rec.parent_id; select tree_sortkey into v_parent_sk from sp_folders where folder_id = v_rec.parent_id update sp_folders set tree_sortkey = tree_next_key(v_parent_sk, v_max_value) where folder_id = v_rec.folder_id; end LOOP; return new; end;$$ language plpgsql;