ABAP Select data from SAP table MBVMACKU into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MBVMACKU 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 MBVMACKU. 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 MBVMACKU 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_MBVMACKU TYPE STANDARD TABLE OF MBVMACKU,
      WA_MBVMACKU TYPE MBVMACKU,
      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: <MBVMACKU> TYPE MBVMACKU.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MBVMACKU
*  INTO TABLE @DATA(IT_MBVMACKU2).
*--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_MBVMACKU INDEX 1 INTO DATA(WA_MBVMACKU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MBVMACKU>-MANDT = 1.
<MBVMACKU>-MATNR = 1.
<MBVMACKU>-BWKEY = 1.
<MBVMACKU>-BWTAR = 1.
<MBVMACKU>-MTART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MBVMACKU-MATKL, sy-vline,
  WA_MBVMACKU-KZKFG, sy-vline,
  WA_MBVMACKU-VPRSV, sy-vline,
  WA_MBVMACKU-VERPR, sy-vline,
  WA_MBVMACKU-STPRS, sy-vline,
  WA_MBVMACKU-PEINH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MBVMACKU 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_MBVMACKU 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_MBVMACKU INTO WA_MBVMACKU.


*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_MBVMACKU-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MBVMACKU-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field /CWM/VALUM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MBVMACKU-/CWM/VALUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MBVMACKU-/CWM/VALUM.
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_MBVMACKU_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
MTART TYPE STRING,
MATKL TYPE STRING,
KZKFG TYPE STRING,
VPRSV TYPE STRING,
VERPR TYPE STRING,
STPRS TYPE STRING,
PEINH TYPE STRING,
BKLAS TYPE STRING,
BWTTY TYPE STRING,
ZKPRS TYPE STRING,
ZKDAT TYPE STRING,
BWPRS TYPE STRING,
BWPRH TYPE STRING,
BWPS1 TYPE STRING,
BWPH1 TYPE STRING,
VJBWS TYPE STRING,
VJBWH TYPE STRING,
ZPLP1 TYPE STRING,
ZPLP2 TYPE STRING,
ZPLP3 TYPE STRING,
ZPLD1 TYPE STRING,
ZPLD2 TYPE STRING,
ZPLD3 TYPE STRING,
KALNR TYPE STRING,
KALN1 TYPE STRING,
VMSTP TYPE STRING,
VMPEI TYPE STRING,
HRKFT TYPE STRING,
EKALR TYPE STRING,
ZPLPR TYPE STRING,
HKMAT TYPE STRING,
BWPEI TYPE STRING,
/CWM/XCWMAT TYPE STRING,
/CWM/VALUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MBVMACKU_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_MBVMACKU_STR-MANDT sy-vline 
WA_MBVMACKU_STR-MATNR sy-vline 
WA_MBVMACKU_STR-BWKEY sy-vline 
WA_MBVMACKU_STR-BWTAR sy-vline 
WA_MBVMACKU_STR-MTART sy-vline 
WA_MBVMACKU_STR-MATKL sy-vline 
WA_MBVMACKU_STR-KZKFG sy-vline 
WA_MBVMACKU_STR-VPRSV sy-vline 
WA_MBVMACKU_STR-VERPR sy-vline 
WA_MBVMACKU_STR-STPRS sy-vline 
WA_MBVMACKU_STR-PEINH sy-vline 
WA_MBVMACKU_STR-BKLAS sy-vline 
WA_MBVMACKU_STR-BWTTY sy-vline 
WA_MBVMACKU_STR-ZKPRS sy-vline 
WA_MBVMACKU_STR-ZKDAT sy-vline 
WA_MBVMACKU_STR-BWPRS sy-vline 
WA_MBVMACKU_STR-BWPRH sy-vline 
WA_MBVMACKU_STR-BWPS1 sy-vline 
WA_MBVMACKU_STR-BWPH1 sy-vline 
WA_MBVMACKU_STR-VJBWS sy-vline 
WA_MBVMACKU_STR-VJBWH sy-vline 
WA_MBVMACKU_STR-ZPLP1 sy-vline 
WA_MBVMACKU_STR-ZPLP2 sy-vline 
WA_MBVMACKU_STR-ZPLP3 sy-vline 
WA_MBVMACKU_STR-ZPLD1 sy-vline 
WA_MBVMACKU_STR-ZPLD2 sy-vline 
WA_MBVMACKU_STR-ZPLD3 sy-vline 
WA_MBVMACKU_STR-KALNR sy-vline 
WA_MBVMACKU_STR-KALN1 sy-vline 
WA_MBVMACKU_STR-VMSTP sy-vline 
WA_MBVMACKU_STR-VMPEI sy-vline 
WA_MBVMACKU_STR-HRKFT sy-vline 
WA_MBVMACKU_STR-EKALR sy-vline 
WA_MBVMACKU_STR-ZPLPR sy-vline 
WA_MBVMACKU_STR-HKMAT sy-vline 
WA_MBVMACKU_STR-BWPEI sy-vline 
WA_MBVMACKU_STR-/CWM/XCWMAT sy-vline 
WA_MBVMACKU_STR-/CWM/VALUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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