ABAP Select data from SAP table CFBACK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CFBACK
*  INTO TABLE @DATA(IT_CFBACK2).
*--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_CFBACK INDEX 1 INTO DATA(WA_CFBACK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CFBACK>-CODE = 1.
<CFBACK>-ACTIVE = 1.
<CFBACK>-DISPL = 1.
<CFBACK>-IND_SORT = 1.
<CFBACK>-IND_TRACE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CFBACK-FELD, sy-vline,
  WA_CFBACK-AUSPS, sy-vline,
  WA_CFBACK-TFLAG, sy-vline,
  WA_CFBACK-P_ZWERT, sy-vline,
  WA_CFBACK-P_SPOFF, sy-vline,
  WA_CFBACK-SPRINT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CFBACK 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_CFBACK 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_CFBACK INTO WA_CFBACK.


*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_CFBACK_STR, 
CODE TYPE STRING,
ACTIVE TYPE STRING,
DISPL TYPE STRING,
IND_SORT TYPE STRING,
IND_TRACE TYPE STRING,
FELD TYPE STRING,
AUSPS TYPE STRING,
TFLAG TYPE STRING,
P_ZWERT TYPE STRING,
P_SPOFF TYPE STRING,
SPRINT TYPE STRING,
SKTW TYPE STRING,
SDIR TYPE STRING,
BPRINT TYPE STRING,
BOPE TYPE STRING,
BDIR TYPE STRING,
BWRT TYPE STRING,
FNAM TYPE STRING,
SOURCE TYPE STRING,
DECIM TYPE STRING,
ROUND TYPE STRING,
CUKYD TYPE STRING,
NUMBR TYPE STRING,
FLG_LTX TYPE STRING,
TABL_X TYPE STRING,
TABL_Y TYPE STRING,
FZWERT TYPE STRING,
BTABL_X TYPE STRING,
BTABL_Y TYPE STRING,
BFZWERT TYPE STRING,
XY TYPE STRING,
BKZ TYPE STRING,
OTABL_X TYPE STRING,
OTABL_Y TYPE STRING,
OFZWERT TYPE STRING,
DIMPR TYPE STRING,
HDAR TYPE STRING,
HDIR TYPE STRING,
BST TYPE STRING,
TYPE TYPE STRING,
TABNM TYPE STRING,
FIENM TYPE STRING,
SLEVEL TYPE STRING,
SUMME TYPE STRING,
PARTIALSUM TYPE STRING,
HCLASS TYPE STRING,
HIENM TYPE STRING,
DVORZE TYPE STRING,
UNITLENGTH TYPE STRING,
ON_OFF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CFBACK_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_CFBACK_STR-CODE sy-vline 
WA_CFBACK_STR-ACTIVE sy-vline 
WA_CFBACK_STR-DISPL sy-vline 
WA_CFBACK_STR-IND_SORT sy-vline 
WA_CFBACK_STR-IND_TRACE sy-vline 
WA_CFBACK_STR-FELD sy-vline 
WA_CFBACK_STR-AUSPS sy-vline 
WA_CFBACK_STR-TFLAG sy-vline 
WA_CFBACK_STR-P_ZWERT sy-vline 
WA_CFBACK_STR-P_SPOFF sy-vline 
WA_CFBACK_STR-SPRINT sy-vline 
WA_CFBACK_STR-SKTW sy-vline 
WA_CFBACK_STR-SDIR sy-vline 
WA_CFBACK_STR-BPRINT sy-vline 
WA_CFBACK_STR-BOPE sy-vline 
WA_CFBACK_STR-BDIR sy-vline 
WA_CFBACK_STR-BWRT sy-vline 
WA_CFBACK_STR-FNAM sy-vline 
WA_CFBACK_STR-SOURCE sy-vline 
WA_CFBACK_STR-DECIM sy-vline 
WA_CFBACK_STR-ROUND sy-vline 
WA_CFBACK_STR-CUKYD sy-vline 
WA_CFBACK_STR-NUMBR sy-vline 
WA_CFBACK_STR-FLG_LTX sy-vline 
WA_CFBACK_STR-TABL_X sy-vline 
WA_CFBACK_STR-TABL_Y sy-vline 
WA_CFBACK_STR-FZWERT sy-vline 
WA_CFBACK_STR-BTABL_X sy-vline 
WA_CFBACK_STR-BTABL_Y sy-vline 
WA_CFBACK_STR-BFZWERT sy-vline 
WA_CFBACK_STR-XY sy-vline 
WA_CFBACK_STR-BKZ sy-vline 
WA_CFBACK_STR-OTABL_X sy-vline 
WA_CFBACK_STR-OTABL_Y sy-vline 
WA_CFBACK_STR-OFZWERT sy-vline 
WA_CFBACK_STR-DIMPR sy-vline 
WA_CFBACK_STR-HDAR sy-vline 
WA_CFBACK_STR-HDIR sy-vline 
WA_CFBACK_STR-BST sy-vline 
WA_CFBACK_STR-TYPE sy-vline 
WA_CFBACK_STR-TABNM sy-vline 
WA_CFBACK_STR-FIENM sy-vline 
WA_CFBACK_STR-SLEVEL sy-vline 
WA_CFBACK_STR-SUMME sy-vline 
WA_CFBACK_STR-PARTIALSUM sy-vline 
WA_CFBACK_STR-HCLASS sy-vline 
WA_CFBACK_STR-HIENM sy-vline 
WA_CFBACK_STR-DVORZE sy-vline 
WA_CFBACK_STR-UNITLENGTH sy-vline 
WA_CFBACK_STR-ON_OFF sy-vline      INTO ld_text SEPARATED BY SPACE.

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