ABAP Select data from SAP table AFVGM into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFVGM
*  INTO TABLE @DATA(IT_AFVGM2).
*--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_AFVGM INDEX 1 INTO DATA(WA_AFVGM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFVGM>-MANDT = 1.
<AFVGM>-AUFPL = 1.
<AFVGM>-APLZL = 1.
<AFVGM>-PLNTY = 1.
<AFVGM>-PLNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFVGM-PLNKN, sy-vline,
  WA_AFVGM-ZAEHL, sy-vline,
  WA_AFVGM-DATUV, sy-vline,
  WA_AFVGM-LOEKZ, sy-vline,
  WA_AFVGM-PARKZ, sy-vline,
  WA_AFVGM-APLFL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFVGM 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_AFVGM 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_AFVGM INTO WA_AFVGM.


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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_AFVGM-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFVGM-VORNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field PVZNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_AFVGM-PVZNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFVGM-PVZNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_AFVGM-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFVGM-PROJN.
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_AFVGM_STR, 
MANDT TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNKN TYPE STRING,
ZAEHL TYPE STRING,
DATUV TYPE STRING,
LOEKZ TYPE STRING,
PARKZ TYPE STRING,
APLFL TYPE STRING,
VORNR TYPE STRING,
STEUS TYPE STRING,
LTXA1 TYPE STRING,
BEAZE TYPE STRING,
PVZNR TYPE STRING,
PROJN TYPE STRING,
KALID TYPE STRING,
ARBPL TYPE STRING,
WERKS TYPE STRING,
VSTTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFVGM_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_AFVGM_STR-MANDT sy-vline 
WA_AFVGM_STR-AUFPL sy-vline 
WA_AFVGM_STR-APLZL sy-vline 
WA_AFVGM_STR-PLNTY sy-vline 
WA_AFVGM_STR-PLNNR sy-vline 
WA_AFVGM_STR-PLNKN sy-vline 
WA_AFVGM_STR-ZAEHL sy-vline 
WA_AFVGM_STR-DATUV sy-vline 
WA_AFVGM_STR-LOEKZ sy-vline 
WA_AFVGM_STR-PARKZ sy-vline 
WA_AFVGM_STR-APLFL sy-vline 
WA_AFVGM_STR-VORNR sy-vline 
WA_AFVGM_STR-STEUS sy-vline 
WA_AFVGM_STR-LTXA1 sy-vline 
WA_AFVGM_STR-BEAZE sy-vline 
WA_AFVGM_STR-PVZNR sy-vline 
WA_AFVGM_STR-PROJN sy-vline 
WA_AFVGM_STR-KALID sy-vline 
WA_AFVGM_STR-ARBPL sy-vline 
WA_AFVGM_STR-WERKS sy-vline 
WA_AFVGM_STR-VSTTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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