MariaDB: SP:ITERATE-LEAVE

-- ITERATE = do loop again

CREATE PROCEDURE doiterate(p1 INT)
BEGIN
  label1: LOOP
    SET p1 = p1 + 1;
    IF p1 < 10 THEN ITERATE label1; END IF;
    LEAVE label1;
  END LOOP label1;
  SET @x = p1;
END

-- LEAVE = exit loop

CREATE PROCEDURE `test_sp`()
BEGIN
   `my_label`:
   LOOP
      SELECT 'looping';
      LEAVE `my_label`;
   END LOOP;
   SELECT 'out of loop';
END;


-- LEAVE = exit proc

CREATE PROCEDURE `test_sp`()
`my_label`:
BEGIN
   IF @var = 1 THEN
      LEAVE `my_label`;
   END IF;
   DO something();
END `my_label`;



CREATE PROCEDURE proc(IN p TINYINT)
CONTAINS SQL
`whole_proc`:
BEGIN
   SELECT 1;
   IF p < 1 THEN
      LEAVE `whole_proc`;
   END IF;
   SELECT 2;
END;

CALL proc(0);