ABAP Select data from SAP table AFMHD 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 AFMHD 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 AFMHD. 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 AFMHD 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_AFMHD TYPE STANDARD TABLE OF AFMHD,
      WA_AFMHD TYPE AFMHD,
      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: <AFMHD> TYPE AFMHD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFMHD
*  INTO TABLE @DATA(IT_AFMHD2).
*--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_AFMHD INDEX 1 INTO DATA(WA_AFMHD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFMHD>-TDFAMILY = 1.
<AFMHD>-TDFONTSIZE = 1.
<AFMHD>-TDBOLD = 1.
<AFMHD>-TDITALIC = 1.
<AFMHD>-TDULPOSM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFMHD-TDULTHICKM, sy-vline,
  WA_AFMHD-TDENCODING, sy-vline,
  WA_AFMHD-TDAFONTNAM, sy-vline,
  WA_AFMHD-TDAFAMILY, sy-vline,
  WA_AFMHD-TDWEIGHT, sy-vline,
  WA_AFMHD-TDITANGLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFMHD 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_AFMHD 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_AFMHD INTO WA_AFMHD.


*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_AFMHD_STR, 
TDFAMILY TYPE STRING,
TDFONTSIZE TYPE STRING,
TDBOLD TYPE STRING,
TDITALIC TYPE STRING,
TDULPOSM TYPE STRING,
TDULTHICKM TYPE STRING,
TDENCODING TYPE STRING,
TDAFONTNAM TYPE STRING,
TDAFAMILY TYPE STRING,
TDWEIGHT TYPE STRING,
TDITANGLE TYPE STRING,
TDPROPORT TYPE STRING,
TDCPI TYPE STRING,
TDPPRINTID TYPE STRING,
TDLPRINTID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFMHD_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_AFMHD_STR-TDFAMILY sy-vline 
WA_AFMHD_STR-TDFONTSIZE sy-vline 
WA_AFMHD_STR-TDBOLD sy-vline 
WA_AFMHD_STR-TDITALIC sy-vline 
WA_AFMHD_STR-TDULPOSM sy-vline 
WA_AFMHD_STR-TDULTHICKM sy-vline 
WA_AFMHD_STR-TDENCODING sy-vline 
WA_AFMHD_STR-TDAFONTNAM sy-vline 
WA_AFMHD_STR-TDAFAMILY sy-vline 
WA_AFMHD_STR-TDWEIGHT sy-vline 
WA_AFMHD_STR-TDITANGLE sy-vline 
WA_AFMHD_STR-TDPROPORT sy-vline 
WA_AFMHD_STR-TDCPI sy-vline 
WA_AFMHD_STR-TDPPRINTID sy-vline 
WA_AFMHD_STR-TDLPRINTID sy-vline      INTO ld_text SEPARATED BY SPACE.

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