topic Re: Persistence Object in Application Development and Automation Discussions

Persistence Object

Former Member — Wed, 28 Jun 2006 06:36:13 GMT

Hi friends,

Can any one tell what is persistence object. While creating a class there is option to select whether it is persistence. And how can i give import and export parameters to a class method. There is no option i can see to specify parameters while creating methods in a class.

Regards,

Gowtham K.

Re: Persistence Object

Former Member — Wed, 28 Jun 2006 06:41:46 GMT

Hi Goutham,

You can go through this document to know more about persistent objects.

http://searchsap.techtarget.com/searchSAP/downloads/chapter-june.pdf

Regarding the methods, in se24, go to methods tab. After defining the method , you can click on parameters button to specify if it is an importing or exporting parameter.

Regards,

SP.

Re: Persistence Object

Former Member — Wed, 28 Jun 2006 06:53:45 GMT

persistence class.

It will generate a class combine with a table, and you can populate the table with this class, include select, insert, modify.

It offer you a way to populate table in a OO way.

But unfortunatly, single persistence class can only combine one table. And after you save the combine relation of the class and table, it is difficult to do further change.

So if your application need to populate multiple table in same time, and do some join select, persistence class won't help too much.

IN THIS CASEBO (business object) will be helpful .

If you don't want to access the relate table directly.

But BO is not a OO way.

Re: Persistence Object

athavanraja — Wed, 28 Jun 2006 07:01:10 GMT

check this weblog

/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql

anb this online help.

http://help.sap.com/saphelp_nw04/helpdata/en/06/f23c33638d11d4966d00a0c94260a5/frameset.htm

Regards

Raja

Re: Persistence Object

Former Member — Tue, 04 Jul 2006 10:30:48 GMT

Hi:

So if I understand it correct, it is very difficult to create persistent object for multiple tables in a single class. Is it difficult or impossible? I tried to add in more than one table and the class does not activate because the key in item table is not in the header table. I tried to look for material in sap online help. While they say it can be done for multiple tables, they do not have any examples.

In the weblog, the author mentions that he got around the problem by creating multiple persistence classes and using data model class to control them, but is not sure if it can be done .

Has anyone come across such a situation before? Is there any resource that is available on this topic?

Thanks for your help.

Subramania