topic Re: Data declaration in Application Development and Automation Discussions

Data declaration

Former Member — Thu, 26 Mar 2009 04:57:04 GMT

Hi Guru's,

Please advice which is da best amoung the below said.

Normally I feel more comfortable using the second one is there any problem using the second one??

Please let me know..

TYPES: BEGIN OF typ_item,
matnr TYPE matnr,
werks TYPE werks_d,
END OF typ_item.
DATA: gt_item TYPE TABLE OF typ_item,
gs_item TYPE typ_item,
gt_where TYPE TABLE OF string.

DATA: begin of itab occurs 0,
             matnr like mara-matnr,
             werks like marc-werks,
          end of itab.

TYPES : BEGIN OF typ_mara,
                 matnr type mara-matnr,
                werks type marc-werks,
            end of typ_mara.
data: typ_mara type table of mara with header line.

Thanks

Raj

Re: Data declaration

Former Member — Thu, 26 Mar 2009 04:58:38 GMT

1st one is the best...

Re: Data declaration

GauthamV — Thu, 26 Mar 2009 05:00:09 GMT

If you look it from performance point of view First one is the better option.

You can check the same from SE30 - tips and tricks in application toolbar.

Re: Data declaration

Former Member — Thu, 26 Mar 2009 05:02:43 GMT

Hi,

Methods 2 and 3 are obsolete statements which make use of internal tables with header line concept and are only for demo purposes.

Method 1 is latest way and can be implemented.

Methods 2 and 3 usage will give u Extended program check error in obsolete statements.

Re: Data declaration

I355602 — Thu, 26 Mar 2009 05:03:00 GMT

Hi,

First one is the best approach.

Declare a type first.

Create an internal table without header line.

Instead of header line create a work area.

And use loop from internal table into work area.

Regards,

Tarun

Re: Data declaration

former_member209217 — Thu, 26 Mar 2009 05:04:58 GMT

Hi Raj,

The first one will give better performance than the remaining ones.

It will be performance drain if we work with internal tables having header lines.It will be better if we create one work area for that internal table and use that.

Also occurs 0 and header line statements may become obsolete in the upcoming versions.

Hope it will be useful.

Regards,

Lakshman

Re: Data declaration

Former Member — Thu, 26 Mar 2009 05:06:14 GMT

Hi Raj,

The data decalration preferably should be like:



Types: Begin of t_tab,
             field1 type c,
             field2 type c,
            End of t_tab.

Data: It_tab type standard table of t_tab,
         wa_tab type t_tab.

Then for fetching the data you can do like:

Loop at it_tab into wa_tab.

Endloop.

Hope it helps

Regards

Mansi

Re: Data declaration

Former Member — Thu, 26 Mar 2009 05:12:44 GMT

Hi:

1st is the best option, since this is the way to declare the internal table as a local object, which further effects the performanance.

So use 1st only.

Regards

Shashi

Re: Data declaration

Former Member — Thu, 26 Mar 2009 05:22:36 GMT

first one is the best one

and also if u use the internal table with header line u vll face some problems and lots of confusion

table and work area are shud be different to make it clear an easy to understand.

second and third are obsolete now and can be used gives no performance issue.

its like goto wich is obsolete hope u got it.

Re: Data declaration

Former Member — Thu, 26 Mar 2009 05:24:11 GMT

First one is the best approach as we should always prefer TYPE declaration instead of LIKE.

Re: Data declaration

Former Member — Thu, 26 Mar 2009 05:59:20 GMT

Hello,

The first one is the best approach.

The other two appraches should not be used as they have become obsolete.

Re: Data declaration

Former Member — Thu, 26 Mar 2009 06:57:49 GMT

Hi,

Thank you for your advice !!

But normally I use the second one and I feel more comfortable in it but now I would like to

change to first one. When I use like I fetch the records by using ALL ENTRIES ,

APPENDING SECOND ITAB TO FIRST ITAB , SELECT SINGLE etc ....

my question is if Iam changing to second one will there be change in logical flow ?

Also please advice purpose of gt_where TYPE TABLE OF string in the below said.

also advice me where is da headerline and pupose of declaring it seperately..

TYPES: BEGIN OF typ_item,
matnr TYPE matnr,
werks TYPE werks_d,
END OF typ_item.

DATA: gt_item TYPE TABLE OF typ_item,
gs_item TYPE typ_item,
gt_where TYPE TABLE OF string.

Thanks

Raj

Edited by: Raj rockss on Mar 26, 2009 7:58 AM

Re: Data declaration

Former Member — Thu, 26 Mar 2009 07:08:04 GMT

Hi Raj,

The second method is not preferable in the new version 6.0,

In the second option it will create you an internal table with header line,

so you while looping it you are not required to write:

loop at itab into wa,

you can only write:



Your select query into itab.
 loop at itab.

Append second itab from first itab on some condition.

Endloop

And gt_where type table of string will make

you an internal table gt_where without header line.

Hope it helps

Regards

Mansi

Re: Data declaration

Former Member — Thu, 26 Mar 2009 08:12:48 GMT

U should not use 2 nd and 3 rd one it is old now.

use this

Types: Begin of ls_tab,

matnr type mara-matnr,

mtart type mara-mtart,

End of ls_tab.

Data: It_tab type standard table of ls_tab,

wa_tab type ls_tab.

then for processing use like

Loop at lt_tab into wa_tab.

logic

Endloop.

Regards

Re: Data declaration

Former Member — Thu, 26 Mar 2009 09:52:51 GMT

Hi All,

Thanks a lot !!

miles to go before u sleep***

Raj ***

Re: Data declaration

Former Member — Thu, 26 Mar 2009 09:53:59 GMT

Hi ,

Thank you !!