oracle根据分隔符将字符串分割成数组函数

--创建表类型 

create or replace type mytype as table of number;
--如果定义成varchar
--CREATE OR REPLACE type mytype as table of varchar2(4000);

-- 将字符串分割成数组 

function my_split(piv_str in varchar2, piv_delimiter in varchar2)
  --piv_str 为字符串，piv_delimiter 为分隔符
  return mytype is
  j        int := 0;
  i        int := 1;
  len      int := 0;
  len1     int := 0;
  str      varchar2(4000);
  my_split mytype := mytype();
begin
  len  := length(piv_str);
  len1 := length(piv_delimiter);
  while j < len loop
    j := instr(piv_str, piv_delimiter, i);
    if j = 0 then
      j   := len;
      str := substr(piv_str, i);
      my_split.extend;
      my_split(my_split.count) := str;
      if i >= len then
        exit;
      end if;
    else
      str := substr(piv_str, i, j - i);
      i   := j + len1;
      my_split.extend;
      my_split(my_split.count) := str;
    end if;
  end loop;
  return my_split;
end my_split;

  
-- 函数调用,两个参数:字符串和分隔符 

select  column_value  from table(my_split('7369,7499,7521,7844',','));

-- 输出结果如下 
7369 
7499 
7521 
7844