Oracle PL/SQL Tutorial/PL SQL Programming/dbms utility — различия между версиями

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м (1 версия)
 
(нет различий)

Версия 13:45, 26 мая 2010

dbms_utility.get_time

SQL>
SQL> declare
  2      type rc is ref cursor;
  3      l_rc rc;
  4      l_dummy all_objects.object_name%type;
  5      l_start number default dbms_utility.get_time;
  6  begin
  7      for i in 1 .. 1000
  8      loop
  9          open l_rc for
 10          "select object_name
 11             from all_objects
 12            where object_id = :x"
 13          using i;
 14          fetch l_rc into l_dummy;
 15          close l_rc;
 16      end loop;
 17      dbms_output.put_line
 18      ( round( (dbms_utility.get_time-l_start)/100, 2 ) ||
 19        " seconds..." );
 20  end;
 21  /
.63 seconds...
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.70
SQL>
SQL> set timing off


Declare dbms_utility.get_time as a variable default value

SQL> set echo on
SQL>
SQL>
SQL> create table t ( x int );
Table created.
SQL>
SQL> set serveroutput on
SQL>
SQL> declare
  2          l_start number default dbms_utility.get_time;
  3  begin
  4          for i in 1 .. 1000
  5          loop
  6                  insert into t values ( 1 );
  7          end loop;
  8          commit;
  9          dbms_output.put_line ( dbms_utility.get_time-l_start || " hsecs" );
 10  end;
 11  /
19 hsecs
PL/SQL procedure successfully completed.
SQL>
SQL>
SQL>
SQL> drop table t;
Table dropped.
SQL>
SQL>