Oracle中按规定的字符截取字符串

CREATE OR REPLACE FUNCTION "F_SPLIT" (p_str IN CLOB, p_delimiter IN VARCHAR2)
  RETURN ty_str_split IS
  j         INT := 0;
  i         INT := 1;
  len       INT := 0;
  len1      INT := 0;
  str       VARCHAR2(4000);
  str_split ty_str_split := ty_str_split();
BEGIN
  len  := LENGTH(p_str);
  len1 := LENGTH(p_delimiter);

  WHILE j < len LOOP
    j := INSTR(p_str, p_delimiter, i);

    IF j = 0 THEN
      j   := len;
      str := SUBSTR(p_str, i);
      str_split.EXTEND;
      str_split(str_split.COUNT) := str;

      IF i >= len THEN
        EXIT;
      END IF;
    ELSE
      str := SUBSTR(p_str, i, j - i);
      i   := j + len1;
      str_split.EXTEND;
      str_split(str_split.COUNT) := str;
    END IF;
  END LOOP;

  RETURN str_split;
END f_split;