Logical Databases PNP

[Former Member]

I am working with logical databases for the first time.

Could someone please explain the following concepts :

1) why do we need to write :

Tables : pernr

pernr is a structure... but the syntax of GET event is : GET <table> ...

so is pernr a structure or a table?

also if data gets flled from PAnnn into the internal tables Pnnnn why do we actually need the table pernr?

could some1 plz explain the concep of the pernr structure/table and the GET event.

results will be awarded.

[amit_khare]

Hi,

I hope you have seen the source code for PNP in SE36 as mentioned in your previous query.

That might answers to most of your queries.

Still you can check these link -

Regards,

Amit.

PS dont forget to close the threads and rewarding all helpful replies.

[Former Member]

Hi soumali ganguly ,

1> Yes , a structure of "pernr" will be created with the help of TABLES statement .

2> We write "TABLES" statement in the report program , so that the components of the

"pernr" can be accessed .

3> Keep in mind that Logical DataBase(LDB) is another program attached to a report program .

4> You write GET statement in the report program . There is corresponding PUT

statement in the LDB program .

5> Now understand the flow of execution :

a> On the encounter of "GET pernr" statement in the report program ,

the control will move to the form "PUT_PERNR" . This form is in the LDB .

b> So , now control is in LDB . On the encounter of "PUT pernr" statement in the

"PUT_PERNR" form in LDB , the system will now execute the statements

written in the GET block .

c> Generally in the GET block , we access the components of "pernr" .

d> After the GET block has finished execution , the control will now again move to

statement after "PUT pernr" statement , in the LDB .

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e> If the "PUT pernr" statement in LDB form "PUT_PERNR" is inside a loop ,

as generally is the case , this "GET-PUT" cycle is repeated several times .

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In short , keep in mind PUT puts the data (one line at a time) in the "pernr"and

GET allows to access the data in "permr" , placed by PUT .

Please do let me know in case of any discrepancies .

Regards ,

Dhera Kamlesh H. R.

[jayanthi_jayaraman]

Hi,

In debugging mode,you can see that before get pernr is processed,pnnnn will be empty.

Once get pernr is processed,pnnnn will contain all the relevant data for a employee for the entered selection criterion.

In PNP,pernr is a node.It is a structure in database.

Once Get pernr is processed,you can pernr structure containing one row.We have to declare Tables pernr.

You can access pernr-pernr.But all the other fields in pernr structure is for internal use.

Check this link.

http://www.sts.tu-harburg.de/teaching/sap_r3/ABAP4/get_.htm

http://www.sts.tu-harburg.de/teaching/sap_r3/ABAP4/put.htm