在Oracle中,用函數返回結果集有時候要用到,下面是demo:
create or replace type t_test as object ( id integer, create_time date, object_name varchar2(60) ); create or replace type t_test_table as table of t_test;
1.用數組的方式
create or replace function f_test(n in number default null) return t_test_table as v_test t_test_table := t_test_table(); begin for i in 1 .. n loop v_test.extend(); v_test(v_test.count) := t_test(i, sysdate, 'name' || i); end loop; return v_test; end f_test; / SQL> select * from table(f_test(5)); ID CREATE_TIME OBJECT_NAME -------- -------------- ------------- 1 07-4月 -15 name1 2 07-4月 -15 name2 3 07-4月 -15 name3 4 07-4月 -15 name4 5 07-4月 -15 name5
2.用管道函數
create or replace function f_test_pipe(n in number default null) return t_test_table PIPELINED as v_test t_test_table := t_test_table(); begin for i in 1 .. nvl(n, 100) loop pipe row(t_test(i, sysdate, 'name' || i)); end loop; return; end f_test_pipe; / SQL> select * from table(f_test_pipe(5)); ID CREATE_TIME OBJECT_NAME ---------- -------------- ---------------- 1 07-4月 -15 mc1 2 07-4月 -15 mc2 3 07-4月 -15 mc3 4 07-4月 -15 mc4 5 07-4月 -15 mc5