PL/SQL - Pre actions if cursor is found - oracle

Question

I have a simple cursor like this:
CURSOR emp_cur
IS
SELECT *
FROM employee
WHERE age > 20;
In my procedure, I want to do some pre-actions only if there are employee in cursor. After that pre-action, I process all rows.
I need this because only if exists employee in that cursor i need to cleanup some tables, otherwise i should "RETURN".
so the code could be:
OPEN emp_cur;
/* Here i need to do pre-action only if emp_cur has rows*/
IF /* has rows*/
THEN
/* do some actions*/
END IF;
LOOP
FETCH emp_cur INTO emp_rec;
EXIT WHEN emp_cur%NOTFOUND;
END LOOP;
CLOSE emp_cur;
For now, i have a "dirty" solution where i open cursor:
First to check if there are rows
Do pre-action and close
Open/fetch again to process rows, and close again

Answer 1

First to check if there are rows
You cannot know about the rows until you FETCH.
From documentation link ,
After a cursor or cursor variable is opened but before the first
fetch, %FOUND returns NULL. After any fetches, it returns TRUE if the
last fetch returned a row, or FALSE if the last fetch did not return a
row.
Once you have fetched the rows, then before processing the rows, you could use %FOUND.
For example,
OPEN c1;
LOOP
FETCH c1 INTO my_ename, my_salary;
IF c1%FOUND THEN -- fetch succeeded
-- Do something
ELSE -- fetch failed, so exit loop
EXIT;
END IF;
END LOOP;

Answer 2

Thinking a little i've wrote this procedure that avoid an IF inside the loop. I know, is a little "strange" but is the only thing i've think works:
OPEN emp_cur;
FECTH emp_cur INTO emp_rec;
IF emp_cur%FOUND
THEN
-- pre actions
END IF;
LOOP
EXIT WHEN emp_cur%NOTFOUND;
-- do something in the loop
FECTH emp_cur INTO emp_rec; -- First fetch was done before the if
END LOOP;
CLOSE emp_cur;