分类: Oracle
2010-02-03 11:08:03
OS:linux
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
SQL> drop user test cascade;
drop user test cascade
*
第 1 行出现错误:
ORA-01940: cannot drop a user that is currently connected
解决:
查找原因,是由于在原来DMP逻辑备份中test用户下的数据中存在job,由于在导入数据时这些job已经开始执行,所以造成在进程中存在
该test用户执行JOB任务的会话,说明该用户正在被使用,所以该用户是不能被drop掉的
下面的ORA-01940错误的复现过程:
创建测试表
drop table test1
select * from test1
create table test1 (datetime date);
创建一个自定义过程
create or replace procedure MYPROC as
begin
for i in 1..100000 loop
insert into TEST1(datetime) values(sysdate);
end loop;
end;
PL/SQL procedure successfully completed
创建JOB,每天1440分钟,即每5分钟运行test过程一次
declare
job number;
begin
sys.dbms_job.submit
(job => job,
what =>’MYPROC;’,
next_date => sysdate,
interval => ’sysdate+(1/1440)*5’);
commit;
end;
PL/SQL procedure successfully completed
运行JOB
SQL> begin
2 sys.dbms_job.run(241);
3 end;
4 /
PL/SQL procedure successfully completed
此时需要删除用户daimin时,就会报下面的错误
以sys登陆系统,删除daimin用户
--查看daimin用户下的job
SQL> select job,what,interval,to_char(next_date, ’yyyy-mm-dd hh24:mi:ss ’)
2 from dba_jobs where schema_user=’DAIMIN’;
JOB WHAT INTERVAL TO_CHAR(NEXT_DATE,’YYYY-MM-DDH
241 MYPROC; sysdate+(1/1440)*5 2008-12-16 10:10:03
查看正在运行的JOB
SQL> select * from dba_jobs_running;
SID JOB FAILURES LAST_DATE LAST_SEC THIS_DATE THIS_SEC INSTANCE
1619 241 2008-12-16 10:25:51 0
查看daimin用户的活动会话
SQL> select sid,serial#,username,program,machine,status
2 from v$session
3 where username=’DAIMIN’
4 AND STATUS=’ACTIVE’;
SID SERIAL# USERNAME PROGRAM MACHINE STATUS
1619 2360 DAIMIN plsqldev.exe STAPLES\DELLF98P-10QC ACTIVE
--以sys用户下来删除daimin用户,会报下面的错误
SQL> drop user daimin cascade;
drop user daimin cascade
ORA-01940: cannot drop a user that is currently connected
试图删除job
SQL> begin
2 FOR r_job IN (select job,what,interval,to_char(next_date, ’yyyy-mm-dd hh24:mi:ss ’)
3 from dba_jobs where schema_user=’DAIMIN’
4 ) LOOP
5 dbms_job.REMOVE(r_job.job);
6 end loop;
7 commit;
8 end;
9 /
begin
FOR r_job IN (select job,what,interval,to_char(next_date, ’yyyy-mm-dd hh24:mi:ss ’)
from dba_jobs where schema_user=’DAIMIN’
) LOOP
dbms_job.REMOVE(r_job.job);
end loop;
commit;
end;
ORA-23421: job number 241 is not a job in the job queue
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 86
ORA-06512: at "SYS.DBMS_IJOB", line 529
ORA-06512: at "SYS.DBMS_JOB", line 171
ORA-06512: at line 5
分析错误:因为以sys用户来删除daimin用户下的JOB,所以会报错
解决方法:
1、杀掉执行JOB任务的会话进程;
alter system disconnect session ’sid,serial#’ immediate;
或者Alter system kill session ’sid,serial#’;
或者
SQL> drop user aa;
drop user aa
*
ERROR at line 1:
ORA-01940: cannot drop a user that is currently connected
SQL> select sid,serial# from v$session
2 where username='AA';
SID SERIAL#
---------- ----------
136 33
SQL> alter system kill session '136,33';
System altered.
2、通过设置在初始文件中设置初始参数JOB_QUEUE_PROCESSES=0来使Oracle会杀掉CJQ0及相应job进程;
修改init.ora文件,然后重新启动数据库,或者执行ALTER SYSTEM SET JOB_QUEUE_PROCESSES = 0;
修改过初始参数 设置JOB_QUEUE_PROCESSES=0之后,重新启动数据库之后,进行逻辑备份的导入操作,先删除用户,此时删除成功!