ABAP Select data from SAP table QFCNTRL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QFCNTRL
*  INTO TABLE @DATA(IT_QFCNTRL2).
*--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_QFCNTRL INDEX 1 INTO DATA(WA_QFCNTRL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QFCNTRL>-FE = 1.
<QFCNTRL>-FETXT = 1.
<QFCNTRL>-ANZFEHLER = 1.
<QFCNTRL>-SERIALNR = 1.
<QFCNTRL>-OT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QFCNTRL-OTTXT, sy-vline,
  WA_QFCNTRL-BAUTL, sy-vline,
  WA_QFCNTRL-FRKLS, sy-vline,
  WA_QFCNTRL-UR, sy-vline,
  WA_QFCNTRL-URTXT, sy-vline,
  WA_QFCNTRL-MN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QFCNTRL 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_QFCNTRL 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_QFCNTRL INTO WA_QFCNTRL.


*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_QFCNTRL_STR, 
FE TYPE STRING,
FETXT TYPE STRING,
ANZFEHLER TYPE STRING,
SERIALNR TYPE STRING,
OT TYPE STRING,
OTTXT TYPE STRING,
BAUTL TYPE STRING,
FRKLS TYPE STRING,
UR TYPE STRING,
URTXT TYPE STRING,
MN TYPE STRING,
MATXT TYPE STRING,
FEBEW TYPE STRING,
LEERZEILE1 TYPE STRING,
LEERZEILE2 TYPE STRING,
LEERZEILE3 TYPE STRING,
LEERZEILE4 TYPE STRING,
LEERZEILE5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QFCNTRL_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_QFCNTRL_STR-FE sy-vline 
WA_QFCNTRL_STR-FETXT sy-vline 
WA_QFCNTRL_STR-ANZFEHLER sy-vline 
WA_QFCNTRL_STR-SERIALNR sy-vline 
WA_QFCNTRL_STR-OT sy-vline 
WA_QFCNTRL_STR-OTTXT sy-vline 
WA_QFCNTRL_STR-BAUTL sy-vline 
WA_QFCNTRL_STR-FRKLS sy-vline 
WA_QFCNTRL_STR-UR sy-vline 
WA_QFCNTRL_STR-URTXT sy-vline 
WA_QFCNTRL_STR-MN sy-vline 
WA_QFCNTRL_STR-MATXT sy-vline 
WA_QFCNTRL_STR-FEBEW sy-vline 
WA_QFCNTRL_STR-LEERZEILE1 sy-vline 
WA_QFCNTRL_STR-LEERZEILE2 sy-vline 
WA_QFCNTRL_STR-LEERZEILE3 sy-vline 
WA_QFCNTRL_STR-LEERZEILE4 sy-vline 
WA_QFCNTRL_STR-LEERZEILE5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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