ABAP Select data from SAP table RESB_AFFW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RESB_AFFW
*  INTO TABLE @DATA(IT_RESB_AFFW2).
*--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_RESB_AFFW INDEX 1 INTO DATA(WA_RESB_AFFW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RESB_AFFW>-RSNUM = 1.
<RESB_AFFW>-RSPOS = 1.
<RESB_AFFW>-RSART = 1.
<RESB_AFFW>-BAUST = 1.
<RESB_AFFW>-BAUWG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RESB_AFFW-BAUGR, sy-vline,
  WA_RESB_AFFW-MEINS, sy-vline,
  WA_RESB_AFFW-BDMNG, sy-vline,
  WA_RESB_AFFW-ENMNG, sy-vline,
  WA_RESB_AFFW-SHKZG, sy-vline,
  WA_RESB_AFFW-BDTER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RESB_AFFW 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_RESB_AFFW 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_RESB_AFFW INTO WA_RESB_AFFW.


*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 MATN1, internal->external for field BAUGR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RESB_AFFW-BAUGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RESB_AFFW-BAUGR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RESB_AFFW-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RESB_AFFW-MEINS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field KBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RESB_AFFW-KBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RESB_AFFW-KBLNR.
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_RESB_AFFW_STR, 
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
BAUST TYPE STRING,
BAUWG TYPE STRING,
BAUGR TYPE STRING,
MEINS TYPE STRING,
BDMNG TYPE STRING,
ENMNG TYPE STRING,
SHKZG TYPE STRING,
BDTER TYPE STRING,
BERKZ TYPE STRING,
PRVBE TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
KZEAR TYPE STRING,
SPLKZ TYPE STRING,
SAKNR TYPE STRING,
KTOMA TYPE STRING,
KZBWS TYPE STRING,
SGT_RCAT TYPE STRING,
KBLNR TYPE STRING,
KBLPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RESB_AFFW_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_RESB_AFFW_STR-RSNUM sy-vline 
WA_RESB_AFFW_STR-RSPOS sy-vline 
WA_RESB_AFFW_STR-RSART sy-vline 
WA_RESB_AFFW_STR-BAUST sy-vline 
WA_RESB_AFFW_STR-BAUWG sy-vline 
WA_RESB_AFFW_STR-BAUGR sy-vline 
WA_RESB_AFFW_STR-MEINS sy-vline 
WA_RESB_AFFW_STR-BDMNG sy-vline 
WA_RESB_AFFW_STR-ENMNG sy-vline 
WA_RESB_AFFW_STR-SHKZG sy-vline 
WA_RESB_AFFW_STR-BDTER sy-vline 
WA_RESB_AFFW_STR-BERKZ sy-vline 
WA_RESB_AFFW_STR-PRVBE sy-vline 
WA_RESB_AFFW_STR-LGNUM sy-vline 
WA_RESB_AFFW_STR-LGTYP sy-vline 
WA_RESB_AFFW_STR-LGPLA sy-vline 
WA_RESB_AFFW_STR-KZEAR sy-vline 
WA_RESB_AFFW_STR-SPLKZ sy-vline 
WA_RESB_AFFW_STR-SAKNR sy-vline 
WA_RESB_AFFW_STR-KTOMA sy-vline 
WA_RESB_AFFW_STR-KZBWS sy-vline 
WA_RESB_AFFW_STR-SGT_RCAT sy-vline 
WA_RESB_AFFW_STR-KBLNR sy-vline 
WA_RESB_AFFW_STR-KBLPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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