topic Re: Basic ABAP Questions in Application Development and Automation Discussions

Basic ABAP Questions

Former Member — Wed, 05 Nov 2008 17:10:45 GMT

Hi,

Have the following doubts/questions.

1) Initialization and At Selection-Screen Output Events are called before the selection screen is displayed. At Selection-Screen Output is also called after the selection screen is executed. Then whats the purpose of the Initialization event? As we can write code in the At Selection-Screen Output whatever we want to write in the Initialization event.

2) Can we create secondary indexes on cluster tables?

3) A structure created in the data dictionary, does it also also exist in the database?

Had posted similar questions earlier, but assume that they have been removed. In case they have been removed, would like to say that these are not interview questions.

Answers to the questions would be appreciated.

Thanks in advance.

Mick

Re: Basic ABAP Questions

Former Member — Wed, 05 Nov 2008 17:14:55 GMT

Dear Mick:

Sorry...But they look to me as Interview Questions...Or Exam Questions...

I'm not going to delete your thread...But you should better go to [SAP Help|http://help.sap.com] and try to find the answers yourself.

Greetings,

Blag.

Re: Basic ABAP Questions

ThomasZloch — Wed, 05 Nov 2008 17:19:52 GMT

No matter how you call these, it's more than one and easily searchable (especially number 2...), plus a vague subject -> reported once again.

Thomas

Re: Basic ABAP Questions

matt — Wed, 05 Nov 2008 17:24:51 GMT

I'm not convinced either.

Re: Basic ABAP Questions

Former Member — Wed, 05 Nov 2008 17:41:38 GMT

Appreciate all the work put in by the all of you to maintain the integrity of the forum.

But these are neither exam questions nor interview questions.

Q2 relating to creation of indexes in secondary tables can be easily solved by trying to create secondary indexes for eg on BSEG. But in BSEG the button for creating secondary indexes is disabled. Whereas in all transparant tables this button is enabled. Therfore the question to clarify whether secondary indexes can be created on cluster tables.

Hope this removes any doubts that these are interview/exam questions.

Regards,

Mick

Re: Basic ABAP Questions

BH2408 — Wed, 05 Nov 2008 18:09:00 GMT

Hi ,

Basically BSEG is the Cluster table , here Cluster Pool is created by 3 to 4 big Cluster table that contains the huge data. There is restric. for Cluster pool that there should be at least one comoon field should be there.So there is no again creation of the secondary index for this sort of tables. we need to retrive the data from that primary index it self.

we can't create the secondary index for the both cluster and pool table.

regards,

Bharani

Re: Basic ABAP Questions

Former Member — Wed, 05 Nov 2008 18:18:13 GMT

Thanks Seetharamaiah.

So what I understand from your reply is that you cannot create a secondary index on cluster tables. Is my understanding correct?

Would also appreciate your help on the other 2 questions.

Regards,

Mick

Re: Basic ABAP Questions

Former Member — Wed, 05 Nov 2008 18:19:55 GMT


> Q2 relating to creation of indexes in secondary tables can be easily solved by trying to create secondary indexes for eg on BSEG. But in BSEG the button for creating secondary indexes is disabled. Whereas in all transparant tables this button is enabled. Therfore the question to clarify whether secondary indexes can be created on cluster tables.

I think the point is that this has been asked and answered dozens of times in this forum. If you had searched (per the rules of engagement) you would have found this out long ago.

Rob

Re: Basic ABAP Questions

Former Member — Wed, 05 Nov 2008 18:26:04 GMT

1) AT SELECTION-SCREEN OUPUT is BPO module of selection screen, which is a special dynpro. Because this event would be run more than one time (for example, you press ENTER on selection screen), you shouldn't use it to initial data object.

3)Simply NO.