topic Re: Lock objects in Application Development and Automation Discussions

Lock objects

Former Member — Tue, 13 Jan 2009 09:53:17 GMT

Moderator message: Please use a more informative subject in future

Hi All,

I have a small doubt.If i make a lock object for a table in write mode.

Then if at any given time one user is writing some content to that table then can other users see the contents of the table, or it only dont allow them to display the table.

Thank in Advance.

Edited by: Matt on Jan 13, 2009 11:56 AM

Re: Lock objects

Former Member — Tue, 13 Jan 2009 09:57:33 GMT

That will depend on the scope parameter passed by you during ENQUEUE..

Re: Lock objects

SuhaSaha — Tue, 13 Jan 2009 10:13:32 GMT

Hello Mayank,

When you create a Lock Object for a table you have to give the Lock Mode. This determines how to the table records are access by several users.

SAP Documentation:


Lock mode
Defines how to synchronize table record access by several users.
The following modes exist:
Exclusive lock
The locked data can be read or processed by one user only. A request for another exclusive lock or for a shared lock is rejected.
Shared lock
Several users can read the same data at the same time, but as soon as a user edits the data, a second user can no longer access this data. Requests for further shared locks are accepted, even if they are issued by different users, but exclusive locks are rejected.
Exclusive but not cumulative lock
Exclusive locks can be requested by the same transaction more than once and handled successively, but an exclusive but not cumulative lock can only be requested once by a given transaction. All other lock requests are rejected.

I think this will help you.

BR,

Suhas

Re: Lock objects

Former Member — Tue, 13 Jan 2009 10:48:39 GMT

Hi,

Go through this link for the details about lock objects.

http://help.sap.com/saphelp_nwpi711/helpdata/en/cf/21eea5446011d189700000e8322d00/content.htm

Regards,

Deepthi.

Re: Lock objects

Former Member — Tue, 13 Jan 2009 10:52:34 GMT

Hi,

you just check below link

hope it will help you.

Regards,

Anki Reddy

Re: Lock objects

Former Member — Tue, 13 Jan 2009 10:56:32 GMT

Hi,

check the following link

http://help.sap.com/saphelp_nw70/helpdata/en/cf/21eea5446011d189700000e8322d00/content.htm

Regards,

Madhu

Re: Lock objects

matt — Tue, 13 Jan 2009 10:57:55 GMT

Please use a more informative subject in future

Re: Lock objects

Former Member — Thu, 15 Jan 2009 04:04:58 GMT

hi,

Thanks for te reply.

But i am getting the following lock mode during lock creation.

1.WRITE

2.READ

3.EXCLUSIVE NOT CUMULATIVE.

and not :

1.Exclusive lock

2.Shared lock

3.Exclusive but not cumulative lock

Is WRITE lock only is EXCLUSE and also corresponding for the others lock.

Please clarify..

Thanks in Advance.