ABAP Select data from SAP table MKUB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MKUB
*  INTO TABLE @DATA(IT_MKUB2).
*--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_MKUB INDEX 1 INTO DATA(WA_MKUB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MKUB>-MANDT = 1.
<MKUB>-MATNR = 1.
<MKUB>-WERKS = 1.
<MKUB>-LGORT = 1.
<MKUB>-CHARG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MKUB-KUNNR, sy-vline,
  WA_MKUB-LVORM, sy-vline,
  WA_MKUB-ERSDA, sy-vline,
  WA_MKUB-ERNAM, sy-vline,
  WA_MKUB-LAEDA, sy-vline,
  WA_MKUB-LFPER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MKUB 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_MKUB 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_MKUB INTO WA_MKUB.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MKUB-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MKUB-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MKUB-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MKUB-KUNNR.
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_MKUB_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
KUNNR TYPE STRING,
LVORM TYPE STRING,
ERSDA TYPE STRING,
ERNAM TYPE STRING,
LAEDA TYPE STRING,
LFPER TYPE STRING,
SPERS TYPE STRING,
SLABS TYPE STRING,
SVMLA TYPE STRING,
KZILS TYPE STRING,
MMENG TYPE STRING,
AMENG TYPE STRING,
VWTZL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MKUB_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_MKUB_STR-MANDT sy-vline 
WA_MKUB_STR-MATNR sy-vline 
WA_MKUB_STR-WERKS sy-vline 
WA_MKUB_STR-LGORT sy-vline 
WA_MKUB_STR-CHARG sy-vline 
WA_MKUB_STR-KUNNR sy-vline 
WA_MKUB_STR-LVORM sy-vline 
WA_MKUB_STR-ERSDA sy-vline 
WA_MKUB_STR-ERNAM sy-vline 
WA_MKUB_STR-LAEDA sy-vline 
WA_MKUB_STR-LFPER sy-vline 
WA_MKUB_STR-SPERS sy-vline 
WA_MKUB_STR-SLABS sy-vline 
WA_MKUB_STR-SVMLA sy-vline 
WA_MKUB_STR-KZILS sy-vline 
WA_MKUB_STR-MMENG sy-vline 
WA_MKUB_STR-AMENG sy-vline 
WA_MKUB_STR-VWTZL sy-vline      INTO ld_text SEPARATED BY SPACE.

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