ABAP Select data from SAP table AAFAB into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AAFAB 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 AAFAB. 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 AAFAB 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_AAFAB TYPE STANDARD TABLE OF AAFAB,
      WA_AAFAB TYPE AAFAB,
      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: <AAFAB> TYPE AAFAB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AAFAB
*  INTO TABLE @DATA(IT_AAFAB2).
*--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_AAFAB INDEX 1 INTO DATA(WA_AAFAB2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AAFAB-AOBAR, sy-vline,
  WA_AAFAB-MIMAX, sy-vline,
  WA_AAFAB-OBJNR, sy-vline,
  WA_AAFAB-ZEINH, sy-vline,
  WA_AAFAB-DAUER, sy-vline,
  WA_AAFAB-DAUKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AAFAB 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_AAFAB 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_AAFAB INTO WA_AAFAB.


*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 AOBAR, internal->external for field AOBAR
CALL FUNCTION 'CONVERSION_EXIT_AOBAR_OUTPUT'
  EXPORTING
    input =                      WA_AAFAB-AOBAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AAFAB-AOBAR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AAFAB-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AAFAB-AENNR.
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_AAFAB_STR, 
MANDT TYPE STRING,
AUFPL_VOR TYPE STRING,
APLZL_VOR TYPE STRING,
AUFPL_NCH TYPE STRING,
APLZL_NCH TYPE STRING,
AOBAR TYPE STRING,
MIMAX TYPE STRING,
OBJNR TYPE STRING,
ZEINH TYPE STRING,
DAUER TYPE STRING,
DAUKZ TYPE STRING,
VORNC TYPE STRING,
NCVOR TYPE STRING,
LOEKZ TYPE STRING,
KALID TYPE STRING,
PRZNT TYPE STRING,
PROVG TYPE STRING,
ARBID TYPE STRING,
WERKS 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,
AUCRE TYPE STRING,
DAUERMAX TYPE STRING,
AENNR TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AAFAB_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_AAFAB_STR-MANDT sy-vline 
WA_AAFAB_STR-AUFPL_VOR sy-vline 
WA_AAFAB_STR-APLZL_VOR sy-vline 
WA_AAFAB_STR-AUFPL_NCH sy-vline 
WA_AAFAB_STR-APLZL_NCH sy-vline 
WA_AAFAB_STR-AOBAR sy-vline 
WA_AAFAB_STR-MIMAX sy-vline 
WA_AAFAB_STR-OBJNR sy-vline 
WA_AAFAB_STR-ZEINH sy-vline 
WA_AAFAB_STR-DAUER sy-vline 
WA_AAFAB_STR-DAUKZ sy-vline 
WA_AAFAB_STR-VORNC sy-vline 
WA_AAFAB_STR-NCVOR sy-vline 
WA_AAFAB_STR-LOEKZ sy-vline 
WA_AAFAB_STR-KALID sy-vline 
WA_AAFAB_STR-PRZNT sy-vline 
WA_AAFAB_STR-PROVG sy-vline 
WA_AAFAB_STR-ARBID sy-vline 
WA_AAFAB_STR-WERKS sy-vline 
WA_AAFAB_STR-FSABD sy-vline 
WA_AAFAB_STR-FSABZ sy-vline 
WA_AAFAB_STR-SSABD sy-vline 
WA_AAFAB_STR-SSABZ sy-vline 
WA_AAFAB_STR-FEABD sy-vline 
WA_AAFAB_STR-FEABZ sy-vline 
WA_AAFAB_STR-SEABD sy-vline 
WA_AAFAB_STR-SEABZ sy-vline 
WA_AAFAB_STR-DAUTM sy-vline 
WA_AAFAB_STR-AUCRE sy-vline 
WA_AAFAB_STR-DAUERMAX sy-vline 
WA_AAFAB_STR-AENNR sy-vline 
WA_AAFAB_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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