ABAP Select data from SAP table AFAB_CLEAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFAB_CLEAR
*  INTO TABLE @DATA(IT_AFAB_CLEAR2).
*--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_AFAB_CLEAR INDEX 1 INTO DATA(WA_AFAB_CLEAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFAB_CLEAR>-AUFPL_VOR = 1.
<AFAB_CLEAR>-APLZL_VOR = 1.
<AFAB_CLEAR>-AUFPL_NCH = 1.
<AFAB_CLEAR>-APLZL_NCH = 1.
<AFAB_CLEAR>-LOEKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFAB_CLEAR-FSABD, sy-vline,
  WA_AFAB_CLEAR-FSABZ, sy-vline,
  WA_AFAB_CLEAR-SSABD, sy-vline,
  WA_AFAB_CLEAR-SSABZ, sy-vline,
  WA_AFAB_CLEAR-FEABD, sy-vline,
  WA_AFAB_CLEAR-FEABZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFAB_CLEAR 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_AFAB_CLEAR 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_AFAB_CLEAR INTO WA_AFAB_CLEAR.


*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 AUFNR_TVOR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFAB_CLEAR-AUFNR_TVOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFAB_CLEAR-AUFNR_TVOR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR_TNCH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AFAB_CLEAR-AUFNR_TNCH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFAB_CLEAR-AUFNR_TNCH.
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_AFAB_CLEAR_STR, 
AUFPL_VOR TYPE STRING,
APLZL_VOR TYPE STRING,
AUFPL_NCH TYPE STRING,
APLZL_NCH TYPE STRING,
LOEKZ TYPE STRING,
FSABD TYPE STRING,
FSABZ TYPE STRING,
SSABD TYPE STRING,
SSABZ TYPE STRING,
FEABD TYPE STRING,
FEABZ TYPE STRING,
SEABD TYPE STRING,
SEABZ TYPE STRING,
DAUTM TYPE STRING,
VBKZ TYPE STRING,
AUFNR_TVOR TYPE STRING,
AUFNR_TNCH TYPE STRING,
FLG_LOCK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFAB_CLEAR_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_AFAB_CLEAR_STR-AUFPL_VOR sy-vline 
WA_AFAB_CLEAR_STR-APLZL_VOR sy-vline 
WA_AFAB_CLEAR_STR-AUFPL_NCH sy-vline 
WA_AFAB_CLEAR_STR-APLZL_NCH sy-vline 
WA_AFAB_CLEAR_STR-LOEKZ sy-vline 
WA_AFAB_CLEAR_STR-FSABD sy-vline 
WA_AFAB_CLEAR_STR-FSABZ sy-vline 
WA_AFAB_CLEAR_STR-SSABD sy-vline 
WA_AFAB_CLEAR_STR-SSABZ sy-vline 
WA_AFAB_CLEAR_STR-FEABD sy-vline 
WA_AFAB_CLEAR_STR-FEABZ sy-vline 
WA_AFAB_CLEAR_STR-SEABD sy-vline 
WA_AFAB_CLEAR_STR-SEABZ sy-vline 
WA_AFAB_CLEAR_STR-DAUTM sy-vline 
WA_AFAB_CLEAR_STR-VBKZ sy-vline 
WA_AFAB_CLEAR_STR-AUFNR_TVOR sy-vline 
WA_AFAB_CLEAR_STR-AUFNR_TNCH sy-vline 
WA_AFAB_CLEAR_STR-FLG_LOCK sy-vline      INTO ld_text SEPARATED BY SPACE.

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