ABAP Select data from SAP table GENFM_S_COL_TITLES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GENFM_S_COL_TITLES
*  INTO TABLE @DATA(IT_GENFM_S_COL_TITLES2).
*--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_GENFM_S_COL_TITLES INDEX 1 INTO DATA(WA_GENFM_S_COL_TITLES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GENFM_S_COL_TITLES>-FIELD01 = 1.
<GENFM_S_COL_TITLES>-FIELD02 = 1.
<GENFM_S_COL_TITLES>-FIELD03 = 1.
<GENFM_S_COL_TITLES>-FIELD04 = 1.
<GENFM_S_COL_TITLES>-FIELD05 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GENFM_S_COL_TITLES-FIELD06, sy-vline,
  WA_GENFM_S_COL_TITLES-FIELD07, sy-vline,
  WA_GENFM_S_COL_TITLES-FIELD08, sy-vline,
  WA_GENFM_S_COL_TITLES-FIELD09, sy-vline,
  WA_GENFM_S_COL_TITLES-FIELD10, sy-vline,
  WA_GENFM_S_COL_TITLES-FIELD11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GENFM_S_COL_TITLES 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_GENFM_S_COL_TITLES 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_GENFM_S_COL_TITLES INTO WA_GENFM_S_COL_TITLES.


*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_GENFM_S_COL_TITLES_STR, 
FIELD01 TYPE STRING,
FIELD02 TYPE STRING,
FIELD03 TYPE STRING,
FIELD04 TYPE STRING,
FIELD05 TYPE STRING,
FIELD06 TYPE STRING,
FIELD07 TYPE STRING,
FIELD08 TYPE STRING,
FIELD09 TYPE STRING,
FIELD10 TYPE STRING,
FIELD11 TYPE STRING,
FIELD12 TYPE STRING,
FIELD13 TYPE STRING,
FIELD14 TYPE STRING,
FIELD15 TYPE STRING,
FIELD16 TYPE STRING,
FIELD17 TYPE STRING,
FIELD18 TYPE STRING,
FIELD19 TYPE STRING,
FIELD20 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GENFM_S_COL_TITLES_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_GENFM_S_COL_TITLES_STR-FIELD01 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD02 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD03 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD04 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD05 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD06 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD07 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD08 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD09 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD10 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD11 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD12 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD13 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD14 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD15 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD16 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD17 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD18 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD19 sy-vline 
WA_GENFM_S_COL_TITLES_STR-FIELD20 sy-vline      INTO ld_text SEPARATED BY SPACE.

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