--查看表空间使用率
select used_percent from dba_tablespace_usage_metrics
where tablespace_name = 'system';
declare
type t_cur_test_n is table of varchar2(20);
t_tab t_cur_test_n := t_cur_test_n(null);
t1 number;
t2 number;
t3 number;
procedure get_time(t out number) is
begin
select to_char(sysdate, 'sssss') into t from dual;
end;
procedure p_1(tab in out t_cur_test_n) is
begin
null;
end;
procedure p_2(tab in out nocopy t_cur_test_n) is
begin
null;
end;
begin
select t.tname into t_tab(1) from t_cur_test t where tid = 6;
get_time(t1);
dbms_output.put_line( to_char(t1 ));
t_tab.extend(8000000,1);
p_1(t_tab);
get_time(t2);
dbms_output.put_line( to_char(t2 ));
t_tab.extend(8000000,1);
p_2(t_tab);
get_time(t3);
dbms_output.put_line( to_char(t3 ));
dbms_output.put_line('时间为');
dbms_output.put_line('---------------');
dbms_output.put_line('不带NOCOPY: ' || to_char(t2 - t1));
dbms_output.put_line('带NOCOPY: ' || to_char(t3 - t2));
end;
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/12961536/viewspace-769577/ ，如需转载，请注明出处，否则将追究法律责任。
