ABAP Select data from SAP table /SDF/SWCM_TR_SYS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SDF/SWCM_TR_SYS 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 /SDF/SWCM_TR_SYS. 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 /SDF/SWCM_TR_SYS 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_/SDF/SWCM_TR_SYS TYPE STANDARD TABLE OF /SDF/SWCM_TR_SYS,
      WA_/SDF/SWCM_TR_SYS TYPE /SDF/SWCM_TR_SYS,
      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: </SDF/SWCM_TR_SYS> TYPE /SDF/SWCM_TR_SYS.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SDF/SWCM_TR_SYS
  INTO TABLE IT_/SDF/SWCM_TR_SYS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SDF/SWCM_TR_SYS
*  INTO TABLE @DATA(IT_/SDF/SWCM_TR_SYS2).
*--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_/SDF/SWCM_TR_SYS INDEX 1 INTO DATA(WA_/SDF/SWCM_TR_SYS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SDF/SWCM_TR_SYS ASSIGNING </SDF/SWCM_TR_SYS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SDF/SWCM_TR_SYS>-DOMNAM = 1.
</SDF/SWCM_TR_SYS>-SYSNAM = 1.
</SDF/SWCM_TR_SYS>-LIMBO = 1.
</SDF/SWCM_TR_SYS>-CICFG = 1.
</SDF/SWCM_TR_SYS>-TMSCFG = 1.

ENDLOOP.

LOOP AT IT_/SDF/SWCM_TR_SYS INTO WA_/SDF/SWCM_TR_SYS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SDF/SWCM_TR_SYS-WBOCFG, sy-vline,
  WA_/SDF/SWCM_TR_SYS-TPCFG, sy-vline,
  WA_/SDF/SWCM_TR_SYS-EXPORTED, sy-vline,
  WA_/SDF/SWCM_TR_SYS-METHOD, sy-vline,
  WA_/SDF/SWCM_TR_SYS-NFSGRP, sy-vline,
  WA_/SDF/SWCM_TR_SYS-COMSYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SDF/SWCM_TR_SYS 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_/SDF/SWCM_TR_SYS 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_/SDF/SWCM_TR_SYS INTO WA_/SDF/SWCM_TR_SYS.


*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_/SDF/SWCM_TR_SYS_STR, 
DOMNAM TYPE STRING,
SYSNAM TYPE STRING,
LIMBO TYPE STRING,
CICFG TYPE STRING,
TMSCFG TYPE STRING,
WBOCFG TYPE STRING,
TPCFG TYPE STRING,
EXPORTED TYPE STRING,
METHOD TYPE STRING,
NFSGRP TYPE STRING,
COMSYS TYPE STRING,
TRADIR TYPE STRING,
DESADM TYPE STRING,
DESSUP TYPE STRING,
SUPALLOW TYPE STRING,
HOLDCON TYPE STRING,
SYSTXT TYPE STRING,
TMSREL TYPE STRING,
SAPREL TYPE STRING,
INSTNR TYPE STRING,
MODDAT TYPE STRING,
MODTIM TYPE STRING,
MODUSR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SDF/SWCM_TR_SYS_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_/SDF/SWCM_TR_SYS_STR-DOMNAM sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-SYSNAM sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-LIMBO sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-CICFG sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-TMSCFG sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-WBOCFG sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-TPCFG sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-EXPORTED sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-METHOD sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-NFSGRP sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-COMSYS sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-TRADIR sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-DESADM sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-DESSUP sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-SUPALLOW sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-HOLDCON sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-SYSTXT sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-TMSREL sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-SAPREL sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-INSTNR sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-MODDAT sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-MODTIM sy-vline 
WA_/SDF/SWCM_TR_SYS_STR-MODUSR sy-vline      INTO ld_text SEPARATED BY SPACE.

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