ABAP Select data from SAP table WTMSU into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WTMSU table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to WTMSU. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the WTMSU table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_WTMSU TYPE STANDARD TABLE OF WTMSU,
      WA_WTMSU TYPE WTMSU,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <WTMSU> TYPE WTMSU.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WTMSU.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WTMSU
  INTO TABLE IT_WTMSU.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WTMSU
*  INTO TABLE @DATA(IT_WTMSU2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_WTMSU INDEX 1 INTO DATA(WA_WTMSU2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WTMSU ASSIGNING <WTMSU>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WTMSU>-ISACLIENT = 1.
<WTMSU>-ISACONTROL = 1.
<WTMSU>-DOMNAM = 1.
<WTMSU>-DOMTXT = 1.
<WTMSU>-ADMUSR = 1.

ENDLOOP.

LOOP AT IT_WTMSU INTO WA_WTMSU.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WTMSU-SUPUSR, sy-vline,
  WA_WTMSU-NFSGRP, sy-vline,
  WA_WTMSU-NFSTXT, sy-vline,
  WA_WTMSU-DOMCTL, sy-vline,
  WA_WTMSU-CTLTXT, sy-vline,
  WA_WTMSU-DOMBCK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WTMSU you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_WTMSU TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_WTMSU INTO WA_WTMSU.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WTMSU_STR, 
ISACLIENT TYPE STRING,
ISACONTROL TYPE STRING,
DOMNAM TYPE STRING,
DOMTXT TYPE STRING,
ADMUSR TYPE STRING,
SUPUSR TYPE STRING,
NFSGRP TYPE STRING,
NFSTXT TYPE STRING,
DOMCTL TYPE STRING,
CTLTXT TYPE STRING,
DOMBCK TYPE STRING,
RFCHOST TYPE STRING,
RFCSERV TYPE STRING,
RFCUSER TYPE STRING,
RFCAUTH TYPE STRING,
SYSNAM TYPE STRING,
SYSTXT TYPE STRING,
SYSHOST TYPE STRING,
SYSSERV TYPE STRING,
COMSYS TYPE STRING,
COMTXT TYPE STRING,
STATUS TYPE STRING,
TMSREL TYPE STRING,
SAPREL TYPE STRING,
MODDAT TYPE STRING,
MODTIM TYPE STRING,
MODUSR TYPE STRING,
DETAIL TYPE STRING,
DETAIL1 TYPE STRING,
DETAIL2 TYPE STRING,
REQUEST TYPE STRING,
REQTXT TYPE STRING,
REQUEST2 TYPE STRING,
REQTXT2 TYPE STRING,
CLIENT TYPE STRING,
CLITXT TYPE STRING,
PARNAM TYPE STRING,
PARTXT TYPE STRING,
WFENGINE TYPE STRING,
WFUSER TYPE STRING,
WFPROFIL TYPE STRING,
DETAIL_DOM TYPE STRING,
DETAIL_GRP TYPE STRING,
DETAIL_WFE TYPE STRING,
PROJECT TYPE STRING,
PROJTXT TYPE STRING,
SNCNAME TYPE STRING,
SNCQOP TYPE STRING,
SNCALLOW TYPE STRING,
IMP_AGAIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WTMSU_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_WTMSU_STR-ISACLIENT sy-vline 
WA_WTMSU_STR-ISACONTROL sy-vline 
WA_WTMSU_STR-DOMNAM sy-vline 
WA_WTMSU_STR-DOMTXT sy-vline 
WA_WTMSU_STR-ADMUSR sy-vline 
WA_WTMSU_STR-SUPUSR sy-vline 
WA_WTMSU_STR-NFSGRP sy-vline 
WA_WTMSU_STR-NFSTXT sy-vline 
WA_WTMSU_STR-DOMCTL sy-vline 
WA_WTMSU_STR-CTLTXT sy-vline 
WA_WTMSU_STR-DOMBCK sy-vline 
WA_WTMSU_STR-RFCHOST sy-vline 
WA_WTMSU_STR-RFCSERV sy-vline 
WA_WTMSU_STR-RFCUSER sy-vline 
WA_WTMSU_STR-RFCAUTH sy-vline 
WA_WTMSU_STR-SYSNAM sy-vline 
WA_WTMSU_STR-SYSTXT sy-vline 
WA_WTMSU_STR-SYSHOST sy-vline 
WA_WTMSU_STR-SYSSERV sy-vline 
WA_WTMSU_STR-COMSYS sy-vline 
WA_WTMSU_STR-COMTXT sy-vline 
WA_WTMSU_STR-STATUS sy-vline 
WA_WTMSU_STR-TMSREL sy-vline 
WA_WTMSU_STR-SAPREL sy-vline 
WA_WTMSU_STR-MODDAT sy-vline 
WA_WTMSU_STR-MODTIM sy-vline 
WA_WTMSU_STR-MODUSR sy-vline 
WA_WTMSU_STR-DETAIL sy-vline 
WA_WTMSU_STR-DETAIL1 sy-vline 
WA_WTMSU_STR-DETAIL2 sy-vline 
WA_WTMSU_STR-REQUEST sy-vline 
WA_WTMSU_STR-REQTXT sy-vline 
WA_WTMSU_STR-REQUEST2 sy-vline 
WA_WTMSU_STR-REQTXT2 sy-vline 
WA_WTMSU_STR-CLIENT sy-vline 
WA_WTMSU_STR-CLITXT sy-vline 
WA_WTMSU_STR-PARNAM sy-vline 
WA_WTMSU_STR-PARTXT sy-vline 
WA_WTMSU_STR-WFENGINE sy-vline 
WA_WTMSU_STR-WFUSER sy-vline 
WA_WTMSU_STR-WFPROFIL sy-vline 
WA_WTMSU_STR-DETAIL_DOM sy-vline 
WA_WTMSU_STR-DETAIL_GRP sy-vline 
WA_WTMSU_STR-DETAIL_WFE sy-vline 
WA_WTMSU_STR-PROJECT sy-vline 
WA_WTMSU_STR-PROJTXT sy-vline 
WA_WTMSU_STR-SNCNAME sy-vline 
WA_WTMSU_STR-SNCQOP sy-vline 
WA_WTMSU_STR-SNCALLOW sy-vline 
WA_WTMSU_STR-IMP_AGAIN sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.