Question

could not drop schema, because user still connected

Asked by: ALSO_DB

i have a 11g oracle database. I want to drop a schema, but one user is still connected, so i couldnt drop the schema. how could i disable the user and after disconnect the user from the schema in sql plus?

or are there other options how i could drop a schema with connected users?

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Asked On
2009-11-04 at 04:36:34ID24870644
Tags

could not drop schema

,

because user still connected

Topics

Oracle 10.x

,

Oracle 11.x Database

Participating Experts
3
Points
500
Comments
11

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Answers

 

by: sdstuberPosted on 2009-11-04 at 04:45:38ID: 25738712

you will have to end the user's session first

lookup the sid and serial#  for the user  from v$session

SELECT sid, serial# FROM v$session
where username = 'THE_USER'

then using those values, plug them in to the string below

alter system disconnect session 'sid , serial#' immediate

 

by: sdstuberPosted on 2009-11-04 at 04:47:41ID: 25738724

if the user reconnects automatically you may also need to lock the account


alter user THE_USER account lock;



then disconnect the user, then drop the user

 

by: shru_0409Posted on 2009-11-04 at 05:28:02ID: 25739025

To find the sessions
select sid,serial# from v$session where username = '<your_schema>'

Then kill them with

alter system kill session '<sid>,<serial#>';

A query that produces ready-built kill-statements could be

select 'alter system kill session ''' || sid || ',' || serial# || ''';' from v$session where username = '<your_schema>'

This will return one kill statement per session for that user
alter system kill session '375,64855';
alter system kill session '346,53146';







 

by: sdstuberPosted on 2009-11-04 at 06:04:16ID: 25739361

that's essentially the same thing posted earlier.

I recommend disconnect immediate over kill though, so you won't have to wait for a client request for the kill to complete.

 

by: ALSO_DBPosted on 2009-11-04 at 06:47:11ID: 25739790

so this should work???

alter user USERNAME account lock;
alter system disconnect session ''' || sid || ',' || serial# || '''immediate;' from v$session where username = 'P$PRODSCHEMA'

drop user P$PRODSCHEMA cascade;

 

by: shru_0409Posted on 2009-11-04 at 07:01:06ID: 25739967

yes sir........... go ahead....


 

by: sdstuberPosted on 2009-11-04 at 07:05:07ID: 25740011

no,  the select above was an example of how to generate the alter system statements

you would run that, then take the results and run those

or just type the sid and serial in

 

by: sdstuberPosted on 2009-11-04 at 07:08:21ID: 25740044

if you want to generate and run the disconnect statements automatically try something like this...


ALTER USER p$prodschema ACCOUNT LOCK;
 
BEGIN
    FOR x
        IN (SELECT 'alter system disconnect session ''' || sid || ',' || serial# || '''immediate;'
                       sqlstr
            FROM v$session
            WHERE username = 'P$PRODSCHEMA')
    LOOP
        EXECUTE IMMEDIATE x.sqlstr;
    END LOOP;
END;
 
DROP USER p$prodschema CASCADE;

                                              
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by: schwertnerPosted on 2009-11-09 at 04:55:37ID: 25775436

You got good advices.
I also experience such problems.
Alternative solution is to disconnect and to drop the schema in the same program.
In many cases the application will not be able to connect so fast:

DECLARE
v_sid         number;
v_serial#  number;
v_kill         VARCHAR2(200);

BEGIN

      SELECT sid, serial# INTO v_sid, v_serial# FROM v$session
      WHERE username = 'MY_USER';
      v_kill := 'alter system kill session ''' || v_sid || ',' || v_serial# || '''' || ' IMMEDIATE';
      dbms_output.put_line(v_kill);
       execute immediate v_kill;
       v_kill := 'alter system kill session ''' || v_sid || ',' || v_serial# || '''' || ' IMMEDIATE';
       v_kill := 'drop user ' || 'MY_USER|| ' cascade';
        dbms_output.put_line(v_kill);
        execute immediate v_kill;
EXCEPTION
     WHEN OTHERS THEN
     dbms_output.put_line('Errors by the clear encountered.');
     dbms_output.put_line(substr(sqlerrm,1,254));
END;

 

by: sdstuberPosted on 2009-11-09 at 06:01:47ID: 25775953

wouldn't a split have been in order?

particularly since the accepted answer is pretty much the same information given by two others 5 days earlier?

 

by: schwertnerPosted on 2009-11-09 at 07:37:16ID: 25776795

Why not to split the points?

Mr. ALSO_DB:

Points have no meaning. If you split the points you will express
gratitude to everybody that has wasted his time to help you.

20120131-EE-VQP-002

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