1. how to check procedure exist:
SQL> conn oper/oper123
Connected.
SQL> desc dbms_lock;
PROCEDURE ALLOCATE_UNIQUE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
LOCKNAME VARCHAR2 IN
LOCKHANDLE VARCHAR2 OUT
EXPIRATION_SECS NUMBER(38) IN DEFAULT
FUNCTION CONVERT RETURNS NUMBER(38)
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
ID NUMBER(38) IN
2.
在编写PL/SQL中,有时需要程序中暂停几秒钟再继续执行,查了一下,Oracle内置有这个功能dbms_lock.sleep(10);不过dbms_lock包需要用户自己安装,演示如下:
[sql] view plain copy print?
- C:\Documents and Settings\andyleng>sqlplus /nolog
- SQL*Plus: Release 11.2.0.1.0 Production on Thu Nov 10 10:04:56 2011
- Copyright (c) 1982, 2010, Oracle. All rights reserved.
- SQL> conn /as sysdba --以SYSDBA身份登陆
- Connected.
- SQL> @?/rdbms/admin/dbmslock.sql --安装系统包
- Package created.
- Synonym created.
- Grant succeeded.
- SQL> grant execute on dbms_lock to public; --授权PUBLIC执行权限
- Grant succeeded.
- SQL> create table test1(id number,name varchar2(40),time date); --创建test1临时表
- Table created.
- SQL> select * from test1; --无数据
- no rows selected
- SQL> SET TIMING ON --打开时间显示
- SQL> begin --开始执行测试脚本
- 2 insert into test1(id,name,time) values(1,‘Andy‘,sysdate);
- 3 DBMS_LOCK.SLEEP(10); --让程序暂时10秒钟
- 4 insert into test1(id,name,time) values(2,‘Shirley‘,sysdate);
- 5 commit;
- 6 end;
- 7 /
- PL/SQL procedure successfully completed.
- Elapsed: 00:00:10.04 --程序执行时间为10.04秒
- SQL> SELECT ID,NAME,TO_CHAR(TIME,‘YYYY/MM/DD HH24:MI:SS‘) AS TIME FROM TEST1; --查询执行结果
- ID NAME TIME
- ---------- ---------------------------------------- -------------------
- 1 Andy 2011/11/10 10:09:03 --第一条的插入时间是09:03
- 2 Shirley 2011/11/10 10:10:13 --第二条的插入时间是09:13,刚好比第一条晚了10秒钟
- Elapsed: 00:00:00.00
- SQL> drop table test1;
- Table dropped.
C:\Documents and Settings\andyleng>sqlplus /nolog SQL*Plus: Release 11.2.0.1.0 Production on Thu Nov 10 10:04:56 2011 Copyright (c) 1982, 2010, Oracle. All rights reserved. SQL> conn /as sysdba --以SYSDBA身份登陆 Connected. SQL> @?/rdbms/admin/dbmslock.sql --安装系统包 Package created. Synonym created. Grant succeeded. SQL> grant execute on dbms_lock to public; --授权PUBLIC执行权限 Grant succeeded. SQL> create table test1(id number,name varchar2(40),time date); --创建test1临时表 Table created. SQL> select * from test1; --无数据 no rows selected SQL> SET TIMING ON --打开时间显示 SQL> begin --开始执行测试脚本 2 insert into test1(id,name,time) values(1,‘Andy‘,sysdate); 3 DBMS_LOCK.SLEEP(10); --让程序暂时10秒钟 4 insert into test1(id,name,time) values(2,‘Shirley‘,sysdate); 5 commit; 6 end; 7 / PL/SQL procedure successfully completed. Elapsed: 00:00:10.04 --程序执行时间为10.04秒 SQL> SELECT ID,NAME,TO_CHAR(TIME,‘YYYY/MM/DD HH24:MI:SS‘) AS TIME FROM TEST1; --查询执行结果 ID NAME TIME ---------- ---------------------------------------- ------------------- 1 Andy 2011/11/10 10:09:03 --第一条的插入时间是09:03 2 Shirley 2011/11/10 10:10:13 --第二条的插入时间是09:13,刚好比第一条晚了10秒钟 Elapsed: 00:00:00.00 SQL> drop table test1; Table dropped.