topic Re: internal tables in Application Development and Automation Discussions

internal tables

Former Member — Thu, 08 Feb 2007 12:49:58 GMT

Hello to all ,

Please tell me which is the best practice to define a internal table .

Bye ..

Re: internal tables

Former Member — Thu, 08 Feb 2007 12:53:18 GMT

hi,

the best way to declare is to define types and then declare the internal table of that type.

regards,

madhumitha.

Re: internal tables

Former Member — Thu, 08 Feb 2007 20:14:44 GMT

Hi Anubhav,

A good practise is (like already mentioned) create the type declaration for the table, then create the table as a standard table with the type defined above.

Also DO NOT create the table with a header line, since all OO objects dont support internal tables with header lines. Hence create a work area awith the same types structure.

Hope it helps.

Rgds,

Aditya

Re: internal tables

Former Member — Thu, 08 Feb 2007 20:17:33 GMT

Hi,

Check this example..It is better to create internal table without header line.

Example

TYPES: BEGIN OF TYPE_MAT_DETAIL,

MATNR TYPE MATNR,

WERKS TYPE WERKS_D,

VKORG TYPE VKORG,

END OF TYPE_MAT_DETAIL.

DATA: T_MAT_DETAIL TYPE STANDARD TABLE OF TYPE_MAT_DETAIL.

DATA: WA_MAT_DETAIL TYPE TYPE_MAT_DETAIL.

LOOP AT T_MAT_DETAIL INTO WA_MAT_DETAIL.

WRITE: / WA_MAT_DETAIL-MATNR.

ENDLOOP.

Thanks,

Naren

Re: internal tables

Former Member — Fri, 09 Feb 2007 05:06:28 GMT

Example:


TYPES: BEGIN OF ty_mara,
             matnr LIKE mara-matnr,
             matkl LIKE mara-matkl,
             END OF ty_mara.

DATA: i_mara TYPE STANDARD TABLE of ty_mara,
          wa_mara TYPE ty_mara.

So after selecting data to i_mara.

While u loop aor read always do as

LOOP AT i_mara INTO wa_mara.
.............
MODIFY i_mara from wa_mara.
clear wa_mara.
ENDLOOP.

If u appen tehn 
APPEND wa_mara TO i_mara.

READ i_mara INTO wa_mara WITH KEY .....

Hope this helps.

Re: internal tables

Former Member — Fri, 09 Feb 2007 06:08:45 GMT

Hi,

This is the best way i think.

TYPES : BEGIN OF ts_dd04l,

rollname TYPE dd04l-rollname,

shlpname TYPE dd04l-shlpname,

END OF ts_dd04l,

tt_dd04l TYPE STANDARD TABLE OF ts_dd04l.

DATA: wa_dd04l TYPE ts_dd04l, "work area

it_dd04l TYPE tt_dd04l.

Re: internal tables

Former Member — Fri, 09 Feb 2007 06:11:19 GMT

Hi,

this is way which i follow...

TYPES : BEGIN OF ts_dd04l,

rollname TYPE dd04l-rollname,

shlpname TYPE dd04l-shlpname,

END OF ts_dd04l,

tt_dd04l TYPE STANDARD TABLE OF ts_dd04l.

DATA: wa_dd04l TYPE ts_dd04l, "wa

it_dd04l TYPE tt_dd04l. "table

Re: internal tables

Former Member — Fri, 09 Feb 2007 10:07:24 GMT

hi Anubhav,

As long as u don't specify occurs n it's a good practice but it's always advantageous using a header line . Also for best Practices u can follow this in SE38 transaction environment->examples->performance Examples.

pl. Provide points if found helpful

Re: internal tables

jayanthi_jayaraman — Fri, 09 Feb 2007 10:21:10 GMT

Hi,

If you want the all the fields in a table or structure,

data itab type standard table of table_name.

If you want only few fields from several structures,

types : begin of ty,

f1 type d1-f1,

f2 type d2-f2,

end of ty.

data itab type standard table of ty.

Re: internal tables

Former Member — Fri, 09 Feb 2007 11:19:03 GMT

Hi,

Data : begin of itab occurs 0.

(req fields),

end of itab.

Thiis will be a internal table with a work area...

but when u yse TYPES to declre a table.. please follow this..

*TYPES : BEGIN OF tp_test,

vbeln LIKE vbak-vbeln,
auart LIKE vbak-auart,
END OF tp_test.

*DATA : wa_test TYPE tp_test. " work area of type tp_test

*DATA : t_test TYPE tp_test OCCURS 0.. " internal table without a header line

*DATA : tt_test TYPE STANDARD TABLE OF tp_test. " internal table without a header line

*DATA : ttt_test TYPE STANDARD TABLE OF tp_test WITH HEADER LINE. " internal table with header line

Hope this helps..

Award if useful..

Rajiv

Re: internal tables

Former Member — Fri, 09 Feb 2007 14:06:56 GMT

as per my coding standards

TYPES:BEGIN OF ty_ekes,
         ebeln TYPE ebeln,    "Purchasing Document Number
         ebelp TYPE ebelp,    "Item Number of Purchasing Document
         etens TYPE etens,    "Sequential Number of Vendor Confirmation
         ebtyp TYPE ebtyp,    "Confirmation category
         vbeln TYPE vbeln_vl, "Delivery
         vbelp TYPE posnr_vl, "Delivery item
         eindt TYPE bbein,    "Delivery date of vendor confirmation
        END OF ty_ekes,
        ty_ekes_t     TYPE STANDARD TABLE OF ty_ekes.

 DATA: it_ekes   TYPE ty_ekes_t,  Internal table
           wa_ekes TYPE  ty_ekes.    work area.

Re: internal tables

Former Member — Wed, 14 Feb 2007 10:51:44 GMT

Hello Anubhav,

DATA: lwa_t001 type t001,

gt_t001 like standard table of lwa_t001.

This is one of the good practice.

And dont ever declare an internal table with header line. It will have lot of performance issues.

Regs,

Venkat Ramanan N