Oracle中Table函数简单应用实例

create or replace type ty_row as object
(col1 varchar2(36),
  col2 varchar2(36),
  col3 varchar2(36)
);

create or replace type ty_table as table of ty_row;

create or replace function f_get_user_info(v_user_id in varchar2 default null)
  return ty_table as
  v_user_list ty_table;
begin
  select ty_row(t.user_id, nvl(t.emp_name, t.user_name), t.user_name) bulk collect
    into v_user_list
    from t_bs_user t
   where t.user_id = v_user_id
      or v_user_id is null;
  return v_user_list;
end f_get_user_info;

select * from table(f_get_user_info('1'))