oracle自定义split分割函数

函数如下：

 create or replace FUNCTION fn_rme_split(p_str       IN VARCHAR2,
                                         p_delimiter IN VARCHAR2)
   RETURN rme_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_delimiter);

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

测试如下：

 select temp.ass_code
 from (SELECT COLUMN_VALUE AS ass_code
 FROM TABLE(rme_delete.fn_rme_split('a,b,c,d,e,f ',','))) temp;

执行结果如下：