topic Re: what different between 'itab' and 'itab[]' in Application Development and Automation Discussions

what different between 'itab' and 'itab[]'

Former Member — Fri, 22 Aug 2008 07:29:23 GMT

Hi,everybody

I am confused what different between 'itab' and 'itab[]' ? ( itab refers to a inner table )

How to use them in a correct place?

Please give me some example and code , thanks!

Re: what different between 'itab' and 'itab[]'

Former Member — Fri, 22 Aug 2008 07:31:00 GMT

Hi,

Itab[] means the Body of the Internal table and Itab means the Header line of internal table.

For details Check this link-

http://www.sap-img.com/abap/with-header-without-header-internal-table.htm

Re: what different between 'itab' and 'itab[]'

Former Member — Fri, 22 Aug 2008 07:31:56 GMT

hi chen

Lets say itab is defined as an internal table with header line .

then itab = contains the header data

itab[] contains the whole data in the internal table .

~hitesh

Re: what different between 'itab' and 'itab[]'

Former Member — Fri, 22 Aug 2008 07:33:13 GMT

thanks for your anwser ,but could you tell me how to use them in different situation.

Re: what different between 'itab' and 'itab[]'

Former Member — Fri, 22 Aug 2008 07:34:05 GMT

itab refers to the internal table with header line (if specified)

However itab[] refers to the body of the table without the header line.

itab[3] refers to the third row of the table

Hope this clears your doubt!

Regards,

Prashant

Re: what different between 'itab' and 'itab[]'

Mohamed_Mukhtar — Fri, 22 Aug 2008 07:35:27 GMT

hi ,

itab is work area or header line

itab[] is body...

this is STructure

TYPES : BEGIN OF ty_qpac,

codegruppe TYPE qpac-codegruppe, " CODE GROUP

code TYPE qpac-code , " CODE

bewertung TYPE qpac-bewertung, " CODE VALUATION

fehlklasse TYPE qpac-fehlklasse, " DEFECT CLASS

qkennzahl TYPE qpac-qkennzahl, " QUALITY SCORE

feldname TYPE qpac-feldname, " POSTING PROPOSAL

bb_dunkel TYPE qpac-bb_dunkel, " STOCK SCREEN BACKGROUND PROCESSING

folgeakti TYPE qpac-folgeakti, " FOLLOW-UP ACTION

text(30) , " Error text

END OF ty_qpac.

Data : it_qpac TYPE TABLE OF ty_qpac, " body

wa_qpac TYPE ty_qpac. " work Area

With the help of work area , data is moved into the body

With Regards.

Always Learner

Re: what different between 'itab' and 'itab[]'

Former Member — Fri, 22 Aug 2008 07:35:28 GMT

Hi,

Itab[] means the body of the Internal table & Itab means the header line of internal table i.e workarea of internal table.

this is the case when we declare the internal table with headerline.

example :

suppose we have internal table with headerline.

data : itab type standard table of mara with headerline.

and here we need to check it's initiality then we write ,

if not itab[] is initial.

to move the data into table we write.

itab[] = itab1[].

itab refers juz a workarea that is need to read one by one record.

hope this helps.

thanks,

dhanashri.

Edited by: Dhanashri Pawar on Aug 22, 2008 9:37 AM

Re: what different between 'itab' and 'itab[]'

Former Member — Fri, 22 Aug 2008 07:35:36 GMT

'itab' : work area of Internal table

'itab[]' : Internal table with header Line

rgds

rajesh

Edited by: RAJESH KUMAR on Aug 22, 2008 1:05 PM

Re: what different between 'itab' and 'itab[]'

Former Member — Fri, 22 Aug 2008 07:36:47 GMT

when you speak itab and itab[] if the table created with Header line , then itab represents the header and itab[] represents the body.

When you refer the table with out header line then there is no difference between them.

>how to use them in different situation

In latest editions you have to use/decalre the tables with out header lines. so in that case you can directly use itab.

Re: what different between 'itab' and 'itab[]'

Former Member — Fri, 22 Aug 2008 07:38:49 GMT

Hi,

When you are Creating Internal table with Header line addition then A work area with the same type of Internal table is created automatically by System.No need to declare the work area separately.

For Accessing the records of the Intaenal table you can use this header line as work area.

Check this link for Sample code-

Check this link for screen shots-

http://sap.mis.cmich.edu/sap-abap/abap04/sld012.htm

Regards,

Sujit

Re: what different between 'itab' and 'itab[]'

former_member196280 — Fri, 22 Aug 2008 07:41:50 GMT

If internal table contains header line, you can use this.

here itab refers as work area.

Example:

LOOP AT itab1.

itab = itab1. "means data is hold only by header line.

Clear itab. " header line is refreshed.

Endloop.

Now,

loop itab

itab will now have any contents as it is not pushed to the internal table content list.

Endloop.

Coming to itab[]. " it describe the contents of internal table

itab[] = itab1[]. " all contents of itab1 will be populated to itab

Loop at itab.

it will have all contents of itab i.e. contents pushed above.

Endloop.

Regards,

SaiRam

Re: what different between 'itab' and 'itab[]'

matt — Fri, 22 Aug 2008 08:01:02 GMT


> Hi,
> 
> 
> Itab[] means the Body of the Internal table and Itab means the Header line of internal table.
> 
> For details Check this link-
> 
> http://www.sap-img.com/abap/with-header-without-header-internal-table.htm

WRONG

For example.

DATA: itab TYPE HASHED TABLE OF mara WITH UNIQUE-KEY matnr

itab here refers only to the table contents. itab[] will also refer to the table contents. There is a difference between the two only for tables with header line.

Now, I wish I'd got to this thread earlier, but in the event someone else reads it, I'll repeat what I've often said.

The use of tables with header lines is BAD programming practice SAP have acknowledged this themselves, by banning their use in ABAP Objects. Always define your table and work areas seperately. Also learn about the different table types, and what they're used for. If you persist in using tables with header lines, you'll never get the advantages offered by hashed or sorted tables.

matt

Re: what different between 'itab' and 'itab[]'

matt — Fri, 22 Aug 2008 08:01:52 GMT


> Hi,
> 
> When you are Creating Internal table with Header line addition then A work area with the same type of Internal table is created automatically by System.No need to declare the work area separately.
> 
> Regards,
> Sujit

Bad programming practice

Re: what different between 'itab' and 'itab[]'

matt — Fri, 22 Aug 2008 08:05:45 GMT


> itab refers to the internal table with header line (if specified)
> 
> However itab[] refers to the body of the table without the header line.
> 
> itab[3] refers to the third row of the table
> 
> Hope this clears your doubt!
> 
> Regards,
> Prashant

itab[3] only refers to the third row of the table in the debugger. I am not aware that indexed row access has ever been permitted or is part of the syntax of the ABAP language. Even if it were, it would not work for non-indexed tables.