oracle 字符串分割

 CREATE OR REPLACE TYPE str_split IS TABLE OF VARCHAR2 (4000);

 create or replace function strsplit2(p_value varchar2, p_split varchar2 := ',')
 return str_split
 pipelined is
 v_idx       integer;
 v_str       varchar2(500);
 v_strs_last varchar2(4000) := p_value;
 begin
 loop
 v_idx := instr(v_strs_last, p_split);
 exit when v_idx = 0;
 v_str       := substr(v_strs_last, 1, v_idx - 1);
 v_strs_last := substr(v_strs_last, v_idx + 1);
 pipe row(v_str);
 end loop;
 pipe row(v_strs_last);
 return;
 end strsplit2;