declare
    object_exists exception;
    pragma exception_init (object_exists , -00955);
begin
  execute immediate 
	'DROP SEQUENCE MDCONTA_SEQ';	

	execute immediate 
	'CREATE SEQUENCE MDCONTA_SEQ INCREMENT BY 1 START WITH 1000 NOCACHE ORDER NOCYCLE';	
	
  exception when object_exists then null;
end;
