Oracle PL/SQL/System Packages/dbms lock

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execute dbms_lock.sleep(42)

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SQL> SQL> create table emp

 2  ( empno      NUMBER(4)    constraint E_PK primary key
 3  , ename      VARCHAR2(8)
 4  , init       VARCHAR2(5)
 5  , job        VARCHAR2(8)
 6  , mgr        NUMBER(4)
 7  , bdate      DATE
 8  , sal        NUMBER(6,2)
 9  , comm       NUMBER(6,2)
10  , deptno     NUMBER(2)    default 10
11  ) ;

Table created. SQL> insert into emp values(1,"Tom","N", "TRAINER", 13,date "1965-12-17", 800 , NULL, 20); 1 row created. SQL> insert into emp values(2,"Jack","JAM", "Tester",6,date "1961-02-20", 1600, 300, 30); 1 row created. SQL> insert into emp values(3,"Wil","TF" , "Tester",6,date "1962-02-22", 1250, 500, 30); 1 row created. SQL> insert into emp values(4,"Jane","JM", "Designer", 9,date "1967-04-02", 2975, NULL, 20); 1 row created. SQL> insert into emp values(5,"Mary","P", "Tester",6,date "1956-09-28", 1250, 1400, 30); 1 row created. SQL> insert into emp values(6,"Black","R", "Designer", 9,date "1963-11-01", 2850, NULL, 30); 1 row created. SQL> insert into emp values(7,"Chris","AB", "Designer", 9,date "1965-06-09", 2450, NULL, 10); 1 row created. SQL> insert into emp values(8,"Smart","SCJ", "TRAINER", 4,date "1959-11-26", 3000, NULL, 20); 1 row created. SQL> insert into emp values(9,"Peter","CC", "Designer",NULL,date "1952-11-17", 5000, NULL, 10); 1 row created. SQL> insert into emp values(10,"Take","JJ", "Tester",6,date "1968-09-28", 1500, 0, 30); 1 row created. SQL> insert into emp values(11,"Ana","AA", "TRAINER", 8,date "1966-12-30", 1100, NULL, 20); 1 row created. SQL> insert into emp values(12,"Jane","R", "Manager", 6,date "1969-12-03", 800 , NULL, 30); 1 row created. SQL> insert into emp values(13,"Fake","MG", "TRAINER", 4,date "1959-02-13", 3000, NULL, 20); 1 row created. SQL> insert into emp values(14,"Mike","TJA","Manager", 7,date "1962-01-23", 1300, NULL, 10); 1 row created. SQL> SQL> col versions_starttime format a21 SQL> col versions_endtime format a21 SQL> SQL> create table e as select * from emp; Table created. SQL> alter session set NLS_TIMESTAMP_FORMAT="DD-MON-YYYY HH24:MI:SS.FF3"; Session altered. SQL> select localtimestamp as table_created from dual; TABLE_CREATED


26-OKT-2009 10:08:54.245 SQL> SQL> execute dbms_lock.sleep(42); PL/SQL procedure successfully completed. SQL> update e

 2  set    sal = sal + 10;

14 rows updated. SQL> commit; Commit complete. SQL> select localtimestamp as after_update_1 from dual; AFTER_UPDATE_1


26-OKT-2009 10:09:36.494 SQL> SQL> execute dbms_lock.sleep(16); PL/SQL procedure successfully completed. SQL> update e

 2  set    sal = sal - 20
 3  where  deptno = 10;

3 rows updated. SQL> commit; Commit complete. SQL> select localtimestamp as after_update_2 from dual; AFTER_UPDATE_2


26-OKT-2009 10:09:52.657 SQL> SQL> execute dbms_lock.sleep(42); PL/SQL procedure successfully completed. SQL> delete from e

 2  where  deptno <= 20;

8 rows deleted. SQL> commit; Commit complete. SQL> select localtimestamp now from dual; NOW


26-OKT-2009 10:10:34.850 SQL> SQL> SQL> drop table emp; Table dropped.

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