1.首先要先创建数组
create or replace type t_ret_table is table of varchar2(20);
2.利用自定义函数实现一，利用函数返回数组．
create or replace function f_split_string(var_str in string,var_split in string) return t_ret_table
is
var_out t_ret_table;
var_tmp varchar2(4000);
var_element varchar2(4000);
begin
var_tmp := var_str;
var_out := t_ret_table();
--如果存在匹配的分割符
while instr(var_tmp,var_split)>0 loop
var_element := substr(var_tmp,1,instr(var_tmp,var_split)-1);
var_tmp := substr(var_tmp,instr(var_tmp,var_split)+length(var_split),length(var_tmp));
var_out.extend(1);
var_out(var_out.count) := var_element;
end loop;
var_out.extend(1);
var_out(var_out.count) := var_tmp;
return var_out;
end f_split_string;
3.利用 pipelined function 函数实现.
create or replace function f_split(var_str in string,var_split in string) return t_ret_table pipelined
as
var_tmp varchar2(4000);
var_element varchar2(4000);
n_length number := length(var_split);
begin
var_tmp := var_str;
while instr(var_tmp,var_split)>0 loop
var_element := substr(var_tmp,1,instr(var_tmp,var_split)-1);
var_tmp := substr(var_tmp,instr(var_tmp,var_split)+n_length,length(var_tmp));
pipe row(var_element);
end loop;
pipe row(var_tmp);
return;
end f_split;
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