ABAP Select data from SAP table ALRFCSCUSW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ALRFCSCUSW 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 ALRFCSCUSW. 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 ALRFCSCUSW 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_ALRFCSCUSW TYPE STANDARD TABLE OF ALRFCSCUSW,
      WA_ALRFCSCUSW TYPE ALRFCSCUSW,
      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: <ALRFCSCUSW> TYPE ALRFCSCUSW.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALRFCSCUSW
*  INTO TABLE @DATA(IT_ALRFCSCUSW2).
*--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_ALRFCSCUSW INDEX 1 INTO DATA(WA_ALRFCSCUSW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALRFCSCUSW>-RFCDEST = 1.
<ALRFCSCUSW>-MTSYSID = 1.
<ALRFCSCUSW>-MTMCNAME = 1.
<ALRFCSCUSW>-MTNUMRANGE = 1.
<ALRFCSCUSW>-MTUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALRFCSCUSW-MTCLASS, sy-vline,
  WA_ALRFCSCUSW-MTINDEX, sy-vline,
  WA_ALRFCSCUSW-EXTINDEX, sy-vline,
  WA_ALRFCSCUSW-CUSTSTAT, sy-vline,
  WA_ALRFCSCUSW-ALERTMODE, sy-vline,
  WA_ALRFCSCUSW-ALERTSHIFT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALRFCSCUSW 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_ALRFCSCUSW 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_ALRFCSCUSW INTO WA_ALRFCSCUSW.


*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_ALRFCSCUSW_STR, 
RFCDEST TYPE STRING,
MTSYSID TYPE STRING,
MTMCNAME TYPE STRING,
MTNUMRANGE TYPE STRING,
MTUID TYPE STRING,
MTCLASS TYPE STRING,
MTINDEX TYPE STRING,
EXTINDEX TYPE STRING,
CUSTSTAT TYPE STRING,
ALERTMODE TYPE STRING,
ALERTSHIFT TYPE STRING,
CUSGRPNAME TYPE STRING,
SYSID TYPE STRING,
CONTEXT TYPE STRING,
CONTXTSTAT TYPE STRING,
CTXCLASS TYPE STRING,
CTXOWNER TYPE STRING,
SEGMENT TYPE STRING,
SEGMENTTYP TYPE STRING,
DESTINAT TYPE STRING,
SEGMSTATUS TYPE STRING,
RESP_MSSY TYPE STRING,
VERSION TYPE STRING,
CHG_USER TYPE STRING,
CHG_DATE TYPE STRING,
CHG_TIME TYPE STRING,
SEGSTATMST TYPE STRING,
SEGSTATCNT TYPE STRING,
SEGMSERVER TYPE STRING,
SEGMHOST TYPE STRING,
CONTXTTYPE TYPE STRING,
CTX_SYSID TYPE STRING,
CTX_MCNAME TYPE STRING,
CTX_NUMRNG TYPE STRING,
CTX_UID TYPE STRING,
CTX_CLAS TYPE STRING,
CTX_INDEX TYPE STRING,
CTX_EXTIDX TYPE STRING,
RESERVE_C TYPE STRING,
RESERVE_I TYPE STRING,
CTXCLIENT TYPE STRING,
CSMSYSID TYPE STRING,
DESTINAT_2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALRFCSCUSW_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_ALRFCSCUSW_STR-RFCDEST sy-vline 
WA_ALRFCSCUSW_STR-MTSYSID sy-vline 
WA_ALRFCSCUSW_STR-MTMCNAME sy-vline 
WA_ALRFCSCUSW_STR-MTNUMRANGE sy-vline 
WA_ALRFCSCUSW_STR-MTUID sy-vline 
WA_ALRFCSCUSW_STR-MTCLASS sy-vline 
WA_ALRFCSCUSW_STR-MTINDEX sy-vline 
WA_ALRFCSCUSW_STR-EXTINDEX sy-vline 
WA_ALRFCSCUSW_STR-CUSTSTAT sy-vline 
WA_ALRFCSCUSW_STR-ALERTMODE sy-vline 
WA_ALRFCSCUSW_STR-ALERTSHIFT sy-vline 
WA_ALRFCSCUSW_STR-CUSGRPNAME sy-vline 
WA_ALRFCSCUSW_STR-SYSID sy-vline 
WA_ALRFCSCUSW_STR-CONTEXT sy-vline 
WA_ALRFCSCUSW_STR-CONTXTSTAT sy-vline 
WA_ALRFCSCUSW_STR-CTXCLASS sy-vline 
WA_ALRFCSCUSW_STR-CTXOWNER sy-vline 
WA_ALRFCSCUSW_STR-SEGMENT sy-vline 
WA_ALRFCSCUSW_STR-SEGMENTTYP sy-vline 
WA_ALRFCSCUSW_STR-DESTINAT sy-vline 
WA_ALRFCSCUSW_STR-SEGMSTATUS sy-vline 
WA_ALRFCSCUSW_STR-RESP_MSSY sy-vline 
WA_ALRFCSCUSW_STR-VERSION sy-vline 
WA_ALRFCSCUSW_STR-CHG_USER sy-vline 
WA_ALRFCSCUSW_STR-CHG_DATE sy-vline 
WA_ALRFCSCUSW_STR-CHG_TIME sy-vline 
WA_ALRFCSCUSW_STR-SEGSTATMST sy-vline 
WA_ALRFCSCUSW_STR-SEGSTATCNT sy-vline 
WA_ALRFCSCUSW_STR-SEGMSERVER sy-vline 
WA_ALRFCSCUSW_STR-SEGMHOST sy-vline 
WA_ALRFCSCUSW_STR-CONTXTTYPE sy-vline 
WA_ALRFCSCUSW_STR-CTX_SYSID sy-vline 
WA_ALRFCSCUSW_STR-CTX_MCNAME sy-vline 
WA_ALRFCSCUSW_STR-CTX_NUMRNG sy-vline 
WA_ALRFCSCUSW_STR-CTX_UID sy-vline 
WA_ALRFCSCUSW_STR-CTX_CLAS sy-vline 
WA_ALRFCSCUSW_STR-CTX_INDEX sy-vline 
WA_ALRFCSCUSW_STR-CTX_EXTIDX sy-vline 
WA_ALRFCSCUSW_STR-RESERVE_C sy-vline 
WA_ALRFCSCUSW_STR-RESERVE_I sy-vline 
WA_ALRFCSCUSW_STR-CTXCLIENT sy-vline 
WA_ALRFCSCUSW_STR-CSMSYSID sy-vline 
WA_ALRFCSCUSW_STR-DESTINAT_2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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