按标识符截取字符串 管道型函数

CREATE OR REPLACE TYPE ty_str_split IS TABLE OF VARCHAR2 (20)

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

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

IF j = 0 THEN
j := len;
str := SUBSTR (p_str, i);
PIPE ROW (str);
IF i >= len THEN
EXIT;
END IF;
ELSE
str := SUBSTR (p_str, i, j - i);
i := j + len1;
PIPE ROW (str);
END IF;
END LOOP;

RETURN;
END str_split;