ABAP Select data from SAP table SCR_CHFLD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCR_CHFLD
*  INTO TABLE @DATA(IT_SCR_CHFLD2).
*--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_SCR_CHFLD INDEX 1 INTO DATA(WA_SCR_CHFLD2).


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

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

ENDLOOP.

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

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


*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_SCR_CHFLD_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,
LINE TYPE STRING,
COLN TYPE STRING,
LOOPTYPE TYPE STRING,
LOOPBEGIN TYPE STRING,
LOOPBLOCK TYPE STRING,
LOOPREPEAT TYPE STRING,
FMKY TYPE STRING,
DIDX TYPE STRING,
FILL TYPE STRING,
COLR TYPE STRING,
PAID TYPE STRING,
UCNV TYPE STRING,
AGLT TYPE STRING,
ADEZ TYPE STRING,
AUTH TYPE STRING,
WNAM TYPE STRING,
DMAC TYPE STRING,
GRP1 TYPE STRING,
GRP2 TYPE STRING,
GRP3 TYPE STRING,
GRP4 TYPE STRING,
STXT TYPE STRING,
RES1 TYPE STRING,
RES2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCR_CHFLD_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_SCR_CHFLD_STR-FELDNAME sy-vline 
WA_SCR_CHFLD_STR-INTTYP sy-vline 
WA_SCR_CHFLD_STR-FELDFORMAT sy-vline 
WA_SCR_CHFLD_STR-LAENGE sy-vline 
WA_SCR_CHFLD_STR-FLG1 sy-vline 
WA_SCR_CHFLD_STR-FLG2 sy-vline 
WA_SCR_CHFLD_STR-FLG3 sy-vline 
WA_SCR_CHFLD_STR-FMB1 sy-vline 
WA_SCR_CHFLD_STR-FMB2 sy-vline 
WA_SCR_CHFLD_STR-LINE sy-vline 
WA_SCR_CHFLD_STR-COLN sy-vline 
WA_SCR_CHFLD_STR-LOOPTYPE sy-vline 
WA_SCR_CHFLD_STR-LOOPBEGIN sy-vline 
WA_SCR_CHFLD_STR-LOOPBLOCK sy-vline 
WA_SCR_CHFLD_STR-LOOPREPEAT sy-vline 
WA_SCR_CHFLD_STR-FMKY sy-vline 
WA_SCR_CHFLD_STR-DIDX sy-vline 
WA_SCR_CHFLD_STR-FILL sy-vline 
WA_SCR_CHFLD_STR-COLR sy-vline 
WA_SCR_CHFLD_STR-PAID sy-vline 
WA_SCR_CHFLD_STR-UCNV sy-vline 
WA_SCR_CHFLD_STR-AGLT sy-vline 
WA_SCR_CHFLD_STR-ADEZ sy-vline 
WA_SCR_CHFLD_STR-AUTH sy-vline 
WA_SCR_CHFLD_STR-WNAM sy-vline 
WA_SCR_CHFLD_STR-DMAC sy-vline 
WA_SCR_CHFLD_STR-GRP1 sy-vline 
WA_SCR_CHFLD_STR-GRP2 sy-vline 
WA_SCR_CHFLD_STR-GRP3 sy-vline 
WA_SCR_CHFLD_STR-GRP4 sy-vline 
WA_SCR_CHFLD_STR-STXT sy-vline 
WA_SCR_CHFLD_STR-RES1 sy-vline 
WA_SCR_CHFLD_STR-RES2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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