ABAP Select data from SAP table FKKMAZE_STRUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKMAZE_STRUC
*  INTO TABLE @DATA(IT_FKKMAZE_STRUC2).
*--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_FKKMAZE_STRUC INDEX 1 INTO DATA(WA_FKKMAZE_STRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKMAZE_STRUC>-MANDT = 1.
<FKKMAZE_STRUC>-LAUFD = 1.
<FKKMAZE_STRUC>-LAUFI = 1.
<FKKMAZE_STRUC>-GPART = 1.
<FKKMAZE_STRUC>-VKONT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKMAZE_STRUC-MAZAE, sy-vline,
  WA_FKKMAZE_STRUC-OPBEL, sy-vline,
  WA_FKKMAZE_STRUC-OPUPW, sy-vline,
  WA_FKKMAZE_STRUC-OPUPK, sy-vline,
  WA_FKKMAZE_STRUC-OPUPZ, sy-vline,
  WA_FKKMAZE_STRUC-BUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKMAZE_STRUC 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_FKKMAZE_STRUC 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_FKKMAZE_STRUC INTO WA_FKKMAZE_STRUC.


*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 ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKMAZE_STRUC-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKMAZE_STRUC-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKMAZE_STRUC-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKMAZE_STRUC-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKMAZE_STRUC-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKMAZE_STRUC-OPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MIBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKMAZE_STRUC-MIBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKMAZE_STRUC-MIBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKMAZE_STRUC-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKMAZE_STRUC-VTREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKMAZE_STRUC-SEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKMAZE_STRUC-SEGMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKMAZE_STRUC-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKMAZE_STRUC-PRCTR.
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_FKKMAZE_STRUC_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
MAZAE TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
BUKRS TYPE STRING,
WAERS TYPE STRING,
MBETM TYPE STRING,
MBETH TYPE STRING,
FAEDN TYPE STRING,
MIBEL TYPE STRING,
MINTM TYPE STRING,
MAHNS TYPE STRING,
MSTYP TYPE STRING,
MAHNN TYPE STRING,
MANSP TYPE STRING,
XMFAK TYPE STRING,
XMSUS TYPE STRING,
XMSTO TYPE STRING,
XINFO TYPE STRING,
MDRKD TYPE STRING,
STAKZ TYPE STRING,
XMVKT TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
SEGMENT TYPE STRING,
PRCTR TYPE STRING,
MAHNV TYPE STRING,
AUSDT TYPE STRING,
SPART TYPE STRING,
XTAUS TYPE STRING,
MOPUPZ TYPE STRING,
HIGHERDL TYPE STRING,
DALIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKMAZE_STRUC_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_FKKMAZE_STRUC_STR-MANDT sy-vline 
WA_FKKMAZE_STRUC_STR-LAUFD sy-vline 
WA_FKKMAZE_STRUC_STR-LAUFI sy-vline 
WA_FKKMAZE_STRUC_STR-GPART sy-vline 
WA_FKKMAZE_STRUC_STR-VKONT sy-vline 
WA_FKKMAZE_STRUC_STR-MAZAE sy-vline 
WA_FKKMAZE_STRUC_STR-OPBEL sy-vline 
WA_FKKMAZE_STRUC_STR-OPUPW sy-vline 
WA_FKKMAZE_STRUC_STR-OPUPK sy-vline 
WA_FKKMAZE_STRUC_STR-OPUPZ sy-vline 
WA_FKKMAZE_STRUC_STR-BUKRS sy-vline 
WA_FKKMAZE_STRUC_STR-WAERS sy-vline 
WA_FKKMAZE_STRUC_STR-MBETM sy-vline 
WA_FKKMAZE_STRUC_STR-MBETH sy-vline 
WA_FKKMAZE_STRUC_STR-FAEDN sy-vline 
WA_FKKMAZE_STRUC_STR-MIBEL sy-vline 
WA_FKKMAZE_STRUC_STR-MINTM sy-vline 
WA_FKKMAZE_STRUC_STR-MAHNS sy-vline 
WA_FKKMAZE_STRUC_STR-MSTYP sy-vline 
WA_FKKMAZE_STRUC_STR-MAHNN sy-vline 
WA_FKKMAZE_STRUC_STR-MANSP sy-vline 
WA_FKKMAZE_STRUC_STR-XMFAK sy-vline 
WA_FKKMAZE_STRUC_STR-XMSUS sy-vline 
WA_FKKMAZE_STRUC_STR-XMSTO sy-vline 
WA_FKKMAZE_STRUC_STR-XINFO sy-vline 
WA_FKKMAZE_STRUC_STR-MDRKD sy-vline 
WA_FKKMAZE_STRUC_STR-STAKZ sy-vline 
WA_FKKMAZE_STRUC_STR-XMVKT sy-vline 
WA_FKKMAZE_STRUC_STR-VTREF sy-vline 
WA_FKKMAZE_STRUC_STR-SUBAP sy-vline 
WA_FKKMAZE_STRUC_STR-SEGMENT sy-vline 
WA_FKKMAZE_STRUC_STR-PRCTR sy-vline 
WA_FKKMAZE_STRUC_STR-MAHNV sy-vline 
WA_FKKMAZE_STRUC_STR-AUSDT sy-vline 
WA_FKKMAZE_STRUC_STR-SPART sy-vline 
WA_FKKMAZE_STRUC_STR-XTAUS sy-vline 
WA_FKKMAZE_STRUC_STR-MOPUPZ sy-vline 
WA_FKKMAZE_STRUC_STR-HIGHERDL sy-vline 
WA_FKKMAZE_STRUC_STR-DALIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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