ABAP Select data from SAP table AFWCH_FLWA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFWCH_FLWA
*  INTO TABLE @DATA(IT_AFWCH_FLWA2).
*--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_AFWCH_FLWA INDEX 1 INTO DATA(WA_AFWCH_FLWA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFWCH_FLWA>-MANDT = 1.
<AFWCH_FLWA>-FLID = 1.
<AFWCH_FLWA>-VARIANTE = 1.
<AFWCH_FLWA>-FLTYP = 1.
<AFWCH_FLWA>-RMBID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFWCH_FLWA-SICHTID, sy-vline,
  WA_AFWCH_FLWA-FIELDNAME, sy-vline,
  WA_AFWCH_FLWA-HVARIANTE, sy-vline,
  WA_AFWCH_FLWA-HNODID, sy-vline,
  WA_AFWCH_FLWA-AUTGR, sy-vline,
  WA_AFWCH_FLWA-TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFWCH_FLWA 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_AFWCH_FLWA 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_AFWCH_FLWA INTO WA_AFWCH_FLWA.


*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.

*Conversion exit ALPHA, internal->external for field HVARIANTE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFWCH_FLWA-HVARIANTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFWCH_FLWA-HVARIANTE.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_AFWCH_FLWA_STR, 
MANDT TYPE STRING,
FLID TYPE STRING,
VARIANTE TYPE STRING,
FLTYP TYPE STRING,
RMBID TYPE STRING,
SICHTID TYPE STRING,
FIELDNAME TYPE STRING,
HVARIANTE TYPE STRING,
HNODID TYPE STRING,
AUTGR TYPE STRING,
TEXT TYPE STRING,
CRUSER TYPE STRING,
CRTSTP TYPE STRING,
UPUSER TYPE STRING,
UPTSTP TYPE STRING,
CDATE TYPE STRING,
UDATE TYPE STRING,
SINGLE TYPE STRING,
OKCODE TYPE STRING,
FLAG_EXIST TYPE STRING,
FLAG_AUTH TYPE STRING,
FLAG_AUX TYPE STRING,
FLAG_OBJ_ATTR TYPE STRING,
FLAG_OBJ_SELE TYPE STRING,
FLAG_OBJ_TESTSL TYPE STRING,
TABNAME TYPE STRING,
SELKIND TYPE STRING,
SELDISP TYPE STRING,
NINDEX TYPE STRING,
MININDEX TYPE STRING,
MAXINDEX TYPE STRING,
INTVIEW TYPE STRING,
TESTMODUS TYPE STRING,
REF_FLID TYPE STRING,
STATUS_RESET TYPE STRING,
TRKORR TYPE STRING,
TESTVARIANTE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFWCH_FLWA_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_AFWCH_FLWA_STR-MANDT sy-vline 
WA_AFWCH_FLWA_STR-FLID sy-vline 
WA_AFWCH_FLWA_STR-VARIANTE sy-vline 
WA_AFWCH_FLWA_STR-FLTYP sy-vline 
WA_AFWCH_FLWA_STR-RMBID sy-vline 
WA_AFWCH_FLWA_STR-SICHTID sy-vline 
WA_AFWCH_FLWA_STR-FIELDNAME sy-vline 
WA_AFWCH_FLWA_STR-HVARIANTE sy-vline 
WA_AFWCH_FLWA_STR-HNODID sy-vline 
WA_AFWCH_FLWA_STR-AUTGR sy-vline 
WA_AFWCH_FLWA_STR-TEXT sy-vline 
WA_AFWCH_FLWA_STR-CRUSER sy-vline 
WA_AFWCH_FLWA_STR-CRTSTP sy-vline 
WA_AFWCH_FLWA_STR-UPUSER sy-vline 
WA_AFWCH_FLWA_STR-UPTSTP sy-vline 
WA_AFWCH_FLWA_STR-CDATE sy-vline 
WA_AFWCH_FLWA_STR-UDATE sy-vline 
WA_AFWCH_FLWA_STR-SINGLE sy-vline 
WA_AFWCH_FLWA_STR-OKCODE sy-vline 
WA_AFWCH_FLWA_STR-FLAG_EXIST sy-vline 
WA_AFWCH_FLWA_STR-FLAG_AUTH sy-vline 
WA_AFWCH_FLWA_STR-FLAG_AUX sy-vline 
WA_AFWCH_FLWA_STR-FLAG_OBJ_ATTR sy-vline 
WA_AFWCH_FLWA_STR-FLAG_OBJ_SELE sy-vline 
WA_AFWCH_FLWA_STR-FLAG_OBJ_TESTSL sy-vline 
WA_AFWCH_FLWA_STR-TABNAME sy-vline 
WA_AFWCH_FLWA_STR-SELKIND sy-vline 
WA_AFWCH_FLWA_STR-SELDISP sy-vline 
WA_AFWCH_FLWA_STR-NINDEX sy-vline 
WA_AFWCH_FLWA_STR-MININDEX sy-vline 
WA_AFWCH_FLWA_STR-MAXINDEX sy-vline 
WA_AFWCH_FLWA_STR-INTVIEW sy-vline 
WA_AFWCH_FLWA_STR-TESTMODUS sy-vline 
WA_AFWCH_FLWA_STR-REF_FLID sy-vline 
WA_AFWCH_FLWA_STR-STATUS_RESET sy-vline 
WA_AFWCH_FLWA_STR-TRKORR sy-vline 
WA_AFWCH_FLWA_STR-TESTVARIANTE sy-vline      INTO ld_text SEPARATED BY SPACE.

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