逗号分隔的字符串转换为行数据（collection）
CREATE OR REPLACE FUNCTION "GET_STR_TAB" (v_str in varchoracle账号ar2) return table_str pipelined as
v_new_str varchar2(8000);
begin
if v_str is null then
pipe row(-1);
else
v_new_str:=replace(replace(v_str,chr(10),''),chr(9),'');
while 1=1 loop
if instr(v_new_str,',')=0 then
pipe row(to_number(v_new_str));
exit;
else
pipe row(to_number(substr(v_new_str,1,instr(v_new_str,',')-1)));
v_new_str:=substr(v_new_str,instr(v_new_str,',')+1);
end if;
end loop;
end if;
return;
end;
另还要有一个type类型
CREATE OR REPLACE TYPE "TABLE_STR" as table of number