时间:2021-07-01 10:21:17 帮助过:3人阅读
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
|
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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Oracle中函数如何返回结果集
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