ABAP Select data from SAP table GFC_PRGFLD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GFC_PRGFLD
*  INTO TABLE @DATA(IT_GFC_PRGFLD2).
*--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_GFC_PRGFLD INDEX 1 INTO DATA(WA_GFC_PRGFLD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GFC_PRGFLD>-FELDNAME = 1.
<GFC_PRGFLD>-INTTYP = 1.
<GFC_PRGFLD>-FELDFORMAT = 1.
<GFC_PRGFLD>-LAENGE = 1.
<GFC_PRGFLD>-FLG1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GFC_PRGFLD-FLG2, sy-vline,
  WA_GFC_PRGFLD-FLG3, sy-vline,
  WA_GFC_PRGFLD-FMB1, sy-vline,
  WA_GFC_PRGFLD-FMB2, sy-vline,
  WA_GFC_PRGFLD-ALLOWED, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_GFC_PRGFLD 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_GFC_PRGFLD 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_GFC_PRGFLD INTO WA_GFC_PRGFLD.


*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_GFC_PRGFLD_STR, 
FELDNAME TYPE STRING,
INTTYP TYPE STRING,
FELDFORMAT TYPE STRING,
LAENGE TYPE STRING,
FLG1 TYPE STRING,
FLG2 TYPE STRING,
FLG3 TYPE STRING,
FMB1 TYPE STRING,
FMB2 TYPE STRING,
ALLOWED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GFC_PRGFLD_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_GFC_PRGFLD_STR-FELDNAME sy-vline 
WA_GFC_PRGFLD_STR-INTTYP sy-vline 
WA_GFC_PRGFLD_STR-FELDFORMAT sy-vline 
WA_GFC_PRGFLD_STR-LAENGE sy-vline 
WA_GFC_PRGFLD_STR-FLG1 sy-vline 
WA_GFC_PRGFLD_STR-FLG2 sy-vline 
WA_GFC_PRGFLD_STR-FLG3 sy-vline 
WA_GFC_PRGFLD_STR-FMB1 sy-vline 
WA_GFC_PRGFLD_STR-FMB2 sy-vline 
WA_GFC_PRGFLD_STR-ALLOWED sy-vline      INTO ld_text SEPARATED BY SPACE.

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