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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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原文地址:http://www.cnblogs.com/fery/p/5608018.html