declare
	nn number;
	gg recordgroup;
begin

gg := CREATE_GROUP_FROM_QUERY('gg','select -1 , level , ename , null , empno 
from emp connect by prior mgr = empno 
start with emono = ( select min(empno) from emp )');
	
	nn:=populate_group(gg);
	
	ftree.set_tree_property('TREE4',ftree.record_group,'gg');
end;