ABAP Select data from SAP table FRMLS_KF_SCREEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FRMLS_KF_SCREEN
*  INTO TABLE @DATA(IT_FRMLS_KF_SCREEN2).
*--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_FRMLS_KF_SCREEN INDEX 1 INTO DATA(WA_FRMLS_KF_SCREEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FRMLS_KF_SCREEN>-KEY_FIGURE_ID = 1.
<FRMLS_KF_SCREEN>-KF_GROUP_ID = 1.
<FRMLS_KF_SCREEN>-SORT = 1.
<FRMLS_KF_SCREEN>-EHS_PROP = 1.
<FRMLS_KF_SCREEN>-FUNC_MODULE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FRMLS_KF_SCREEN-VACLID, sy-vline,
  WA_FRMLS_KF_SCREEN-RVLID, sy-vline,
  WA_FRMLS_KF_SCREEN-TEXT_ID, sy-vline,
  WA_FRMLS_KF_SCREEN-TEXT, sy-vline,
  WA_FRMLS_KF_SCREEN-BUTTON, sy-vline,
  WA_FRMLS_KF_SCREEN-VALUE_CALC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FRMLS_KF_SCREEN 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_FRMLS_KF_SCREEN 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_FRMLS_KF_SCREEN INTO WA_FRMLS_KF_SCREEN.


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

*Conversion exit CUNIT, internal->external for field UOM_SPEC_KEY
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FRMLS_KF_SCREEN-UOM_SPEC_KEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FRMLS_KF_SCREEN-UOM_SPEC_KEY.
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_FRMLS_KF_SCREEN_STR, 
KEY_FIGURE_ID TYPE STRING,
KF_GROUP_ID TYPE STRING,
SORT TYPE STRING,
EHS_PROP TYPE STRING,
FUNC_MODULE TYPE STRING,
VACLID TYPE STRING,
RVLID TYPE STRING,
TEXT_ID TYPE STRING,
TEXT TYPE STRING,
BUTTON TYPE STRING,
VALUE_CALC TYPE STRING,
UOM_CALC TYPE STRING,
UOM_CALC_KEY TYPE STRING,
VALUE_SPEC TYPE STRING,
UOM_SPEC TYPE STRING,
UOM_SPEC_KEY TYPE STRING,
ADDINF TYPE STRING,
CALC_ERROR TYPE STRING,
CT TYPE STRING,
FT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FRMLS_KF_SCREEN_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_FRMLS_KF_SCREEN_STR-KEY_FIGURE_ID sy-vline 
WA_FRMLS_KF_SCREEN_STR-KF_GROUP_ID sy-vline 
WA_FRMLS_KF_SCREEN_STR-SORT sy-vline 
WA_FRMLS_KF_SCREEN_STR-EHS_PROP sy-vline 
WA_FRMLS_KF_SCREEN_STR-FUNC_MODULE sy-vline 
WA_FRMLS_KF_SCREEN_STR-VACLID sy-vline 
WA_FRMLS_KF_SCREEN_STR-RVLID sy-vline 
WA_FRMLS_KF_SCREEN_STR-TEXT_ID sy-vline 
WA_FRMLS_KF_SCREEN_STR-TEXT sy-vline 
WA_FRMLS_KF_SCREEN_STR-BUTTON sy-vline 
WA_FRMLS_KF_SCREEN_STR-VALUE_CALC sy-vline 
WA_FRMLS_KF_SCREEN_STR-UOM_CALC sy-vline 
WA_FRMLS_KF_SCREEN_STR-UOM_CALC_KEY sy-vline 
WA_FRMLS_KF_SCREEN_STR-VALUE_SPEC sy-vline 
WA_FRMLS_KF_SCREEN_STR-UOM_SPEC sy-vline 
WA_FRMLS_KF_SCREEN_STR-UOM_SPEC_KEY sy-vline 
WA_FRMLS_KF_SCREEN_STR-ADDINF sy-vline 
WA_FRMLS_KF_SCREEN_STR-CALC_ERROR sy-vline 
WA_FRMLS_KF_SCREEN_STR-CT sy-vline 
WA_FRMLS_KF_SCREEN_STR-FT sy-vline      INTO ld_text SEPARATED BY SPACE.

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