topic Re: Persistent classs in Application Development and Automation Discussions

Persistent classs

rafael_menezes — Mon, 17 Mar 2008 17:50:05 GMT

Hi,

Could anyone send a snippet with a "how-to-use" example of the method IF_OS_CA_PERSISTENCY~GET_PERSISTENT_BY_OID??

Regards,

Rafael Menezes

Re: Persistent classs

GrahamRobbo — Mon, 17 Mar 2008 20:53:33 GMT

Hi Raf,

there are lots of blogs and other help on this. Just do a search in SDN for them.

I like this blog from Thomas. /people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql

Cheers

Graham

Re: Persistent classs

rafael_menezes — Mon, 17 Mar 2008 21:41:23 GMT

Hello Graham. Thanks for your help. But this is the way I know how to use persistent class. I'd like to see an example using Instance-GUID like in

[Mapping by Instance-GUID and Business Key|http://help.sap.com/saphelp_nw04s/helpdata/en/b1/82309cd26611d4b2e90050dadfb92b/frameset.htm]

I've browsed tons of documents here in SDN and couldn't find any with a practical example.

I mean, like SAP Help, they mention the Instance-GUID way, but don't show an example.

Regards,

Rafael Menezes

Re: Persistent classs

Former Member — Tue, 18 Mar 2008 12:44:59 GMT

Hi Rafael,

The interface method GET_PERSISTENT_BY_OID might not be having any implementations in the versioning of SAP.

Better check some function modules GETGUID* and write your own implementation with help of these findings.

There are number of functions for GETGUID*.

Hope you find outthe function module.

Regds,

Gaurav

Re: Persistent classs

Former Member — Wed, 23 Apr 2008 07:30:39 GMT

Can any one explain about persistent class.

I want definition .

And functionality

Re: Persistent classs

Former Member — Fri, 17 Sep 2010 15:05:25 GMT

Can any one explain about persistent class.
I want definition .
And functionality

There is a nice explanation here:

[Concepts Used in Persistence|http://help.sap.com/saphelp_nw04s/helpdata/en/f5/a3682ebc6911d4b2e80050dadfb92b/frameset.htm]

Simply put, Persistent Objects are objects which don't disappear after a program ends. Technically, Persistent Object is connected to a Transparent Table and all its data (attributes) are saved there and can be loaded later on.

Try SE80 and create a Persistent Object for yourself.

Re: Persistent classs

Former Member — Fri, 17 Sep 2010 15:20:34 GMT

Hello Graham. Thanks for your help. But this is the way I know how to use persistent class. I'd like to see an example using Instance-GUID like in
Mapping by Instance-GUID and Business Key
I've browsed tons of documents here in SDN and couldn't find any with a practical example.
I mean, like SAP Help, they mention the Instance-GUID way, but don't show an example.
Regards,
Rafael Menezes

Hi,

I know it's quite a time, but it might help someone else. I am just looking into this technique but I think it's like this.

First of all, if you want to use OID, you have to create a field in a Transparent Table which is of a type OS_GUID. You can see this guide for details: [Mapping by Instance-GUID|http://help.sap.com/saphelp_nw04s/helpdata/en/b1/82309fd26611d4b2e90050dadfb92b/frameset.htm]

I think you have probably read that.

After that, you will see, that the method IF_OS_CA_PERSISTENCY~GET_PERSISTENT_BY_OID gets automatically implemented. And by calling this method, you can get your Persistent Object after supplying this method with an OID parameter.

Example of use:

I would use it for example when I would want to remember data currently being edited by a certain user and display the same conent next time the user runs a transaction. To achieve this I would create a table with a user name as a key field and OID as a second field. And this way I would remember Persistent Object's OID for each user .