在Oracle中,用函数返回结果集有时候要用到,下面是demo:
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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.用数组的方式
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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
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2.用管道函数
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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
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