The LEAVE loop modifying command operates as follows:
< loop command >
---- LEAVE
|
| < end loop command >
--->
The < loop command > and < end loop command > can be any of the following:
SELECT / ENDSELECT
SELECTLIST / ENDSELECT
SELECT_SQL / ENDSELECT
DOWHILE / ENDWHILE
DOUNTIL / ENDUNTIL
BEGIN_LOOP / END_LOOP.