ABAP Select data from SAP table MCFKENNZBW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCFKENNZBW
*  INTO TABLE @DATA(IT_MCFKENNZBW2).
*--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_MCFKENNZBW INDEX 1 INTO DATA(WA_MCFKENNZBW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCFKENNZBW>-MCGLTRP = 1.
<MCFKENNZBW>-MCFTRMI = 1.
<MCFKENNZBW>-MCFTRMP = 1.
<MCFKENNZBW>-MCGSTRI = 1.
<MCFKENNZBW>-MCGETRI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCFKENNZBW-MCGSTRP, sy-vline,
  WA_MCFKENNZBW-MCGLTRS, sy-vline,
  WA_MCFKENNZBW-MCFTRMS, sy-vline,
  WA_MCFKENNZBW-MCGSTRS, sy-vline,
  WA_MCFKENNZBW-MCLTRMI, sy-vline,
  WA_MCFKENNZBW-MCLTRMP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCFKENNZBW 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_MCFKENNZBW 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_MCFKENNZBW INTO WA_MCFKENNZBW.


*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 NUMCV, internal->external for field UVORN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MCFKENNZBW-UVORN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCFKENNZBW-UVORN.
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_MCFKENNZBW_STR, 
MCGLTRP TYPE STRING,
MCFTRMI TYPE STRING,
MCFTRMP TYPE STRING,
MCGSTRI TYPE STRING,
MCGETRI TYPE STRING,
MCGSTRP TYPE STRING,
MCGLTRS TYPE STRING,
MCFTRMS TYPE STRING,
MCGSTRS TYPE STRING,
MCLTRMI TYPE STRING,
MCLTRMP TYPE STRING,
MCETRMP TYPE STRING,
MCSTRMP TYPE STRING,
MCFSEDD TYPE STRING,
MCFSAVD TYPE STRING,
MCIEAVD TYPE STRING,
MCIADD TYPE STRING,
MCIEDD TYPE STRING,
MCISDD TYPE STRING,
MCSSADD TYPE STRING,
MCSSAVD TYPE STRING,
MCSSEDD TYPE STRING,
MCISAVD TYPE STRING,
UVORN TYPE STRING,
P_DLZ TYPE STRING,
S_DLZ TYPE STRING,
I_DLZ TYPE STRING,
PS_FREI TYPE STRING,
PI_FREI TYPE STRING,
SI_FREI TYPE STRING,
PS_STAR TYPE STRING,
PI_STAR TYPE STRING,
SI_STAR TYPE STRING,
PS_LIEF TYPE STRING,
PI_LIEF TYPE STRING,
SI_LIEF TYPE STRING,
Z_TAB TYPE STRING,
A_TAB TYPE STRING,
R_TAB TYPE STRING,
PS_FREIP TYPE STRING,
PI_FREIP TYPE STRING,
SI_FREIP TYPE STRING,
PS_STARP TYPE STRING,
PI_STARP TYPE STRING,
SI_STARP TYPE STRING,
PS_LIEFP TYPE STRING,
PI_LIEFP TYPE STRING,
SI_LIEFP TYPE STRING,
Z_TABP TYPE STRING,
A_TABP TYPE STRING,
R_TABP TYPE STRING,
PS_FREIN TYPE STRING,
PI_FREIN TYPE STRING,
SI_FREIN TYPE STRING,
PS_STARN TYPE STRING,
PI_STARN TYPE STRING,
SI_STARN TYPE STRING,
PS_LIEFN TYPE STRING,
PI_LIEFN TYPE STRING,
SI_LIEFN TYPE STRING,
Z_TABN TYPE STRING,
A_TABN TYPE STRING,
R_TABN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCFKENNZBW_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_MCFKENNZBW_STR-MCGLTRP sy-vline 
WA_MCFKENNZBW_STR-MCFTRMI sy-vline 
WA_MCFKENNZBW_STR-MCFTRMP sy-vline 
WA_MCFKENNZBW_STR-MCGSTRI sy-vline 
WA_MCFKENNZBW_STR-MCGETRI sy-vline 
WA_MCFKENNZBW_STR-MCGSTRP sy-vline 
WA_MCFKENNZBW_STR-MCGLTRS sy-vline 
WA_MCFKENNZBW_STR-MCFTRMS sy-vline 
WA_MCFKENNZBW_STR-MCGSTRS sy-vline 
WA_MCFKENNZBW_STR-MCLTRMI sy-vline 
WA_MCFKENNZBW_STR-MCLTRMP sy-vline 
WA_MCFKENNZBW_STR-MCETRMP sy-vline 
WA_MCFKENNZBW_STR-MCSTRMP sy-vline 
WA_MCFKENNZBW_STR-MCFSEDD sy-vline 
WA_MCFKENNZBW_STR-MCFSAVD sy-vline 
WA_MCFKENNZBW_STR-MCIEAVD sy-vline 
WA_MCFKENNZBW_STR-MCIADD sy-vline 
WA_MCFKENNZBW_STR-MCIEDD sy-vline 
WA_MCFKENNZBW_STR-MCISDD sy-vline 
WA_MCFKENNZBW_STR-MCSSADD sy-vline 
WA_MCFKENNZBW_STR-MCSSAVD sy-vline 
WA_MCFKENNZBW_STR-MCSSEDD sy-vline 
WA_MCFKENNZBW_STR-MCISAVD sy-vline 
WA_MCFKENNZBW_STR-UVORN sy-vline 
WA_MCFKENNZBW_STR-P_DLZ sy-vline 
WA_MCFKENNZBW_STR-S_DLZ sy-vline 
WA_MCFKENNZBW_STR-I_DLZ sy-vline 
WA_MCFKENNZBW_STR-PS_FREI sy-vline 
WA_MCFKENNZBW_STR-PI_FREI sy-vline 
WA_MCFKENNZBW_STR-SI_FREI sy-vline 
WA_MCFKENNZBW_STR-PS_STAR sy-vline 
WA_MCFKENNZBW_STR-PI_STAR sy-vline 
WA_MCFKENNZBW_STR-SI_STAR sy-vline 
WA_MCFKENNZBW_STR-PS_LIEF sy-vline 
WA_MCFKENNZBW_STR-PI_LIEF sy-vline 
WA_MCFKENNZBW_STR-SI_LIEF sy-vline 
WA_MCFKENNZBW_STR-Z_TAB sy-vline 
WA_MCFKENNZBW_STR-A_TAB sy-vline 
WA_MCFKENNZBW_STR-R_TAB sy-vline 
WA_MCFKENNZBW_STR-PS_FREIP sy-vline 
WA_MCFKENNZBW_STR-PI_FREIP sy-vline 
WA_MCFKENNZBW_STR-SI_FREIP sy-vline 
WA_MCFKENNZBW_STR-PS_STARP sy-vline 
WA_MCFKENNZBW_STR-PI_STARP sy-vline 
WA_MCFKENNZBW_STR-SI_STARP sy-vline 
WA_MCFKENNZBW_STR-PS_LIEFP sy-vline 
WA_MCFKENNZBW_STR-PI_LIEFP sy-vline 
WA_MCFKENNZBW_STR-SI_LIEFP sy-vline 
WA_MCFKENNZBW_STR-Z_TABP sy-vline 
WA_MCFKENNZBW_STR-A_TABP sy-vline 
WA_MCFKENNZBW_STR-R_TABP sy-vline 
WA_MCFKENNZBW_STR-PS_FREIN sy-vline 
WA_MCFKENNZBW_STR-PI_FREIN sy-vline 
WA_MCFKENNZBW_STR-SI_FREIN sy-vline 
WA_MCFKENNZBW_STR-PS_STARN sy-vline 
WA_MCFKENNZBW_STR-PI_STARN sy-vline 
WA_MCFKENNZBW_STR-SI_STARN sy-vline 
WA_MCFKENNZBW_STR-PS_LIEFN sy-vline 
WA_MCFKENNZBW_STR-PI_LIEFN sy-vline 
WA_MCFKENNZBW_STR-SI_LIEFN sy-vline 
WA_MCFKENNZBW_STR-Z_TABN sy-vline 
WA_MCFKENNZBW_STR-A_TABN sy-vline 
WA_MCFKENNZBW_STR-R_TABN sy-vline      INTO ld_text SEPARATED BY SPACE.

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