ABAP Select data from SAP table AFVER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFVER
*  INTO TABLE @DATA(IT_AFVER2).
*--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_AFVER INDEX 1 INTO DATA(WA_AFVER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFVER>-PLAAB = 1.
<AFVER>-PLANR = 1.
<AFVER>-BDDAT = 1.
<AFVER>-BDDAY = 1.
<AFVER>-VVDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFVER-RVDAT, sy-vline,
  WA_AFVER-BDMNG, sy-vline,
  WA_AFVER-FLG01, sy-vline,
  WA_AFVER-FLG02, sy-vline,
  WA_AFVER-VLINE, sy-vline,
  WA_AFVER-RLINE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFVER 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_AFVER 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_AFVER INTO WA_AFVER.


*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_AFVER_STR, 
PLAAB TYPE STRING,
PLANR TYPE STRING,
BDDAT TYPE STRING,
BDDAY TYPE STRING,
VVDAT TYPE STRING,
RVDAT TYPE STRING,
BDMNG TYPE STRING,
FLG01 TYPE STRING,
FLG02 TYPE STRING,
VLINE TYPE STRING,
RLINE TYPE STRING,
XLINE TYPE STRING,
PLAKZ TYPE STRING,
VERVP TYPE STRING,
SGT_RCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFVER_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_AFVER_STR-PLAAB sy-vline 
WA_AFVER_STR-PLANR sy-vline 
WA_AFVER_STR-BDDAT sy-vline 
WA_AFVER_STR-BDDAY sy-vline 
WA_AFVER_STR-VVDAT sy-vline 
WA_AFVER_STR-RVDAT sy-vline 
WA_AFVER_STR-BDMNG sy-vline 
WA_AFVER_STR-FLG01 sy-vline 
WA_AFVER_STR-FLG02 sy-vline 
WA_AFVER_STR-VLINE sy-vline 
WA_AFVER_STR-RLINE sy-vline 
WA_AFVER_STR-XLINE sy-vline 
WA_AFVER_STR-PLAKZ sy-vline 
WA_AFVER_STR-VERVP sy-vline 
WA_AFVER_STR-SGT_RCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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