Needed information on lock objects

needed information regarding lock objects

hi
The lock mode controls whether several users can access data records at the same time. The
lock mode can be assigned separately for each table in the lock object. When the lock is set, the
corresponding lock entry is stored in the lock table of the system for each table.
Access by more than one user can be synchronized in the following ways:
 Exclusive lock: The locked data can only be displayed or edited by a single user. A
request for another exclusive lock or for a shared lock is rejected.
Shared lock: More than one user can access the locked data at the same time in display
mode. A request for another shared lock is accepted, even if it comes from another user.
An exclusive lock is rejected.
Exclusive but not cumulative: Exclusive locks can be requested several times from the
same transaction and are processed successively. In contrast, exclusive but not
cumulative locks can be called only once from the same transaction. All other lock
requests are rejected.
regards
Nagesh.Paruchuri

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HI ,
I have tables which are updated from FM .
the table have user context .
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Or in other words when to use it and when not ?
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Edited by: Joy Stpr on Oct 18, 2009 8:29 AM

Hi Joy,
Well to be specific I had used Locking the object in HR module, so i would like to explain based on that.
HR modules have many views in a transaction...and they display data from tables.
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either temporarily till u r making changes to it....or for a long time...
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Lock object vith forgien key

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Best Regards
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its simple dear,
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Regards

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Hi Friends,
Iam updating a custom table ztable from internal table entries.
ie : Modify ZTABLE from table ITAB.
Now the entries are updating and inserting perfectly..
But my problem is i need to use lock objects before doing this..
I have created a lock obect EZTABLE with all th ekey fields of the table.. ie : it has 2 key fields
item & matnr .
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Regards,
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hi kumar,
**check if the equipment is already locked by user, if yes, trigger a mail
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 EXPORTING
 MODE_EQUI = 'E'
 MANDT = SY-MANDT
 equnr = lv_equi_temp
 X_EQUNR = ' '
 _SCOPE = '2'
 _WAIT = ' '
 _COLLECT = ' '
 EXCEPTIONS
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 OTHERS = 3.
 IF sy-subrc <> 0.
 lv_subrc1 = sy-subrc.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
 WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
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 equnr = lv_equi_temp
 X_EQUNR = ' '
 _SCOPE = '3'
 _SYNCHRON = ' '
 _COLLECT = ' '
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try like this to check if the object is locked....
u can also use
call function 'ENQUEUE,.
do the needful changes update the database then commit work
then call function 'DEQUEUE'
hope this helps,
tanmaya

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Hi,
I would like to get locked objects in passed time. The oracle version is 9i.
For example,
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Hi,
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Hi, all.
When we create lock object and generate enqueue_<lock object> and
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i read help.sap.com - lock related help but i couldn't get the idea
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Best Regards.
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Hi,
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Hi,
Check these links:
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http://help.sap.com/saphelp_nw04/helpdata/en/8f/c08b3baaa59649e10000000a11402f/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/ce/dc87c1d711f846b34e0e42ede5ebb7/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/d5/e80d3dbd82f72ce10000000a114084/frameset.htm
Process Chain
process chain
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****Assign Points If Helpful****
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Message was edited by:
RK.PNV

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Hi,
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SQL>
create or replace type myScalarType as object
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AUTHID CURRENT_USER
as
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p_owner in varchar2,
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myScalarType( p_lvl, x.referenced_name,
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OPS$TKYTE.T(TABLE)
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OPS$TKYTE.V1(VIEW)
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Message was edited by:
460425

Error while lock object creation

Hi
When I tried to create a lock object, I get the following error.
Error: "Total length of lock argument for table XXXXXXXXX longer than 150"
I have 3 tables in which Table1 is the check table for the value tables (Table2 & Table3). During the process of deletion of a record from Table1 (CT) I need the lock tobe established on value tables and then I delete all the corresponding entries in value tables are also deleted.
Would like to know If there is any other std ways of doing this ? and
Solution to overcome the error.
Regards
Karthick

Hi,
I think the error is becoz you have given too many LOCK parameters in the lock object. the total length of the PARAMTERS of lock object should not exceed 150.
By default all the KEY fields will be taken as Lock paramters, so your table key's length is more than 150.
Also why dont you create 3 lock objects for each table and then use only KEY's of each table as LOCK PARAMETERS.
Then Lock T1 record first then lock T2 and T3 records, then delete records from T2 and T3.
Then you delete T1 record.
The execute DEQUEUE_ALL.
Regards,
Sesh

Patch 9239090 - ORA-04021: timeout occurred while waiting to lock object

Hello Guys,
I need help urgently to comlete an upgrade of ebs 12.1.1 to 12.1.3.
We are upgrading ebs 11i to 12i going live this weekend. We have encountered "ORA-04021: timeout occurred while waiting to lock object" on patch 9239090 with two Workers:
In adctrl:
1 Run AutoPatch R120 AFUTLGRS.pls FAILED
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ERROR at line 1:
ORA-04021: timeout occurred while waiting to lock object
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select s1.username || '@' || s1.machine
|| ' ( SID=' || s1.sid || ' ) is blocking '
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from v$lock l1, v$session s1, v$lock l2, v$session s2
where s1.sid=l1.sid and s2.sid=l2.sid
and l1.BLOCK=1 and l2.request > 0
and l1.id1 = l2.id1
and l2.id2 = l2.id2 ;
2) I also checked and there is space in the database.
3) From adctrl, I have tried restarting the jobs one by one but the worker 1 hangs at and eventually fails on several (12) attempts.
4) The solution on Doc ID 1291064.1 is not the problem:
SQL> select SUPPLEMENTAL_LOG_DATA_MIN, SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI, FORCE_LOGGING
from v$database;
SUPPLEME SUP SUP FOR
NO NO NO NO
5) Manual execution still gave ORA-04021:
sqlplus -s APPS/apps @/u02/applfinp/apps/apps_st/appl/admin/OFPROD/out/p001invok.sql
sqlplus -s APPS/apps @/u02/applfinp/apps/apps_st/appl/admin/OFPROD/out/p002invok.sql
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After proceeding, I have yet hit two more errors and now stuck:
I have hit another error with the same patch:
create or replace package body FND_LOG as
/* $Header: AFUTLOGB.pls 120 ...
AD Worker error:
ORA-04021: timeout occurred while waiting to lock object
Unable to process file in PACKAGE mode.
Not converting file for Invoker's Rights because it appears to be a package body creation script (based on the filename).
File is: /u02/applfinp/apps/apps_st/appl/fnd/12.0.0/patch/115/sql/AFUTLOGB.pls
AD Worker warning:
Product Data File
/u02/applfinp/apps/apps_st/appl/admin/xniprod.txt
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This product is registered in the database but the above file does not exist in APPL_TOP. The product will be ignored without error
AD Worker error:
The following ORACLE error:
ORA-04063: package body "APPS.FND_LOG" has errors
ORA-06508: PL/SQL: could not find program unit being called: "APPS.FND_LOG"
ORA-06512: at "APPS.FND_FUNCTION", line 834
ORA-06512: at "APPS.FND_MENU_ENTRIES_C_DELTRG", line 4
ORA-04088: error during execution of trigger 'APPS.FND_MENU_ENTRIES_C_DELTRG'
Can I stop and restart this patch 9239090?

Hello,
I later executed the failed jobs or scripts manually (successfully) for the patch to continue
sqlplus -s APPS/apps @/u02/applfinp/apps/apps_st/appl/admin/OFPROD/out/p001invok.sql
sqlplus -s APPS/apps @/u02/applfinp/apps/apps_st/appl/admin/OFPROD/out/p002invok.sql
The patch ended with the following :
The following Oracle Reports objects did not generate successfully:
ap reports/US APXARATE.rdf
ar reports/US ARXCTA.rdf
fa reports/US FASRSVED.rdf
ont reports/US OEXOEORD.rdf
pa reports/US PAXACMPT.rdf
pa reports/US PAXALRUN.rdf
pa reports/US PAXACRPT.rdf
pa reports/US PAXCPGAL.rdf
pa reports/US PAXPCRFD.rdf
The patch execution ended but the patch number is not record in apps.ad_bugs table:
select TO_CHAR(CREATION_DATE,'dd-Mon-yyyy, hh24:mm:ss'), BUG_NUMBER from apps.ad_bugs where bug_number in ('9239090');
no rows selected
JFI
Patches located in ad_applied_patches to which there is no a corresponding record in ad_bugs:
SQL> SELECT a.patch_name, TO_CHAR(max(a.last_update_date),'dd-Mon-yyyy, hh24:mm:ss')
2 FROM applsys.ad_applied_patches a
3 WHERE NOT EXISTS (SELECT '1'
4 FROM ad_bugs b
5 WHERE b.bug_number = a.patch_name)
6 group by a.patch_name;
PATCH_NAME TO_CHAR(MAX(A.LAST_UP
9239090 26-Oct-2013, 00:10:27
AutoConfig 25-Oct-2013, 17:10:51
merger9179588 25-Oct-2013, 11:10:30
merger_post_5903765 27-Apr-2013, 23:04:45
mergeu6678700 25-Oct-2013, 16:10:09
What could have happened that this was not recorded in ad_bugs?
How to I get this recorded in the ad_bugs table?
Thanks
Mathias

Create lock object with fun command

Hallo,
Is it possible to create a lock object with the fun command? I tried to use:
FUN ( ENQUEUE _<lockobject> , <interface> ).
When I fill the importing parameters, execute the script and afterwards refresh the interace than the import parameters are empty. Is there a way to create a lock object with the fun command or at least with inline abap?
regards,
Wolfgang

Hi Wolfgang,
in general your way of including the FUN command was correct.
The loss of import parameter values must have been caused by some other reason, not related to the invoke of enqueue. Maybe try it again.
If, for any reason, using FUN is not possible, it's always an alternative to use ABAP. .... ENDABAP. with correct ABAP coding inbetween (e.g. CALL FUNCTION ...).
Nevertheless regarding enqueue you need to consider, that the lock you set by running eCATT test scripts in this way, will last (only) as long as the session in which the function was called is active. Means, it lasts as long as you do not close the SECATT transaction (/n or similar) and not use commands like RESCON in your test script. Check your locks with transaction sm12.
Be aware, that interfering with an applications lock handling and strategy might also harm running transactions or the data processed by this transactions. Usually there is no need to call the enqueue modules from a test.
Best Regards
Jens

About lock object

I have one TABLE with TABLE MAINTENANCE GENERATOR
and it has also LOCK OBJECT.
Now I have adjusted the table by making some normal fields as primary keys
and regenerated Table maintenance generator ,
It seems to me lock object also adjusted( I am able to see the newly converted primary key fields in lock object( in se11 ) ).
Does the lock object automatically adjusts ????
If lock object adjusts automatically --> what about the function modules ENQUEUE_ztable DEQUEUE_ztable ? these function modules also gets adjusted ?
do I need to check the associated lock object impact ?
How can I check ?

Hi,
No need to delete the Lock object. Just remove the Table which you modified from Lock object & add again. You can add the lock Parameters manually. It will be drived automatically from Table key fields.
You no need to delete the lock object.
Raja T
Message was edited by:
Raja T

Needed information on lock objects

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