ABAP Select data from SAP table MCVBELB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCVBELB
*  INTO TABLE @DATA(IT_MCVBELB2).
*--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_MCVBELB INDEX 1 INTO DATA(WA_MCVBELB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCVBELB>-SUPKZ = 1.
<MCVBELB>-MANDT = 1.
<MCVBELB>-VBELN = 1.
<MCVBELB>-POSNR = 1.
<MCVBELB>-ETENR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCVBELB-ETTYP, sy-vline,
  WA_MCVBELB-LFREL, sy-vline,
  WA_MCVBELB-EDATU, sy-vline,
  WA_MCVBELB-EZEIT, sy-vline,
  WA_MCVBELB-WMENG, sy-vline,
  WA_MCVBELB-BMENG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCVBELB 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_MCVBELB 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_MCVBELB INTO WA_MCVBELB.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCVBELB-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCVBELB-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MCVBELB-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCVBELB-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MCVBELB-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCVBELB-MEINS.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field ROMEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MCVBELB-ROMEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCVBELB-ROMEI.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PLNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCVBELB-PLNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCVBELB-PLNUM.
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_MCVBELB_STR, 
SUPKZ TYPE STRING,
MANDT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
ETENR TYPE STRING,
ETTYP TYPE STRING,
LFREL TYPE STRING,
EDATU TYPE STRING,
EZEIT TYPE STRING,
WMENG TYPE STRING,
BMENG TYPE STRING,
VRKME TYPE STRING,
LMENG TYPE STRING,
MEINS TYPE STRING,
BDDAT TYPE STRING,
BDART TYPE STRING,
PLART TYPE STRING,
VBELE TYPE STRING,
POSNE TYPE STRING,
ETENE TYPE STRING,
RSDAT TYPE STRING,
IDNNR TYPE STRING,
BANFN TYPE STRING,
BSART TYPE STRING,
BSTYP TYPE STRING,
WEPOS TYPE STRING,
REPOS TYPE STRING,
LRGDT TYPE STRING,
PRGRS TYPE STRING,
TDDAT TYPE STRING,
MBDAT TYPE STRING,
LDDAT TYPE STRING,
WADAT TYPE STRING,
CMENG TYPE STRING,
LIFSP TYPE STRING,
GRSTR TYPE STRING,
ABART TYPE STRING,
ABRUF TYPE STRING,
ROMS1 TYPE STRING,
ROMS2 TYPE STRING,
ROMS3 TYPE STRING,
ROMEI TYPE STRING,
RFORM TYPE STRING,
UMVKZ TYPE STRING,
UMVKN TYPE STRING,
VERFP TYPE STRING,
BWART TYPE STRING,
BNFPO TYPE STRING,
ETART TYPE STRING,
AUFNR TYPE STRING,
PLNUM TYPE STRING,
SERNR TYPE STRING,
AESKD TYPE STRING,
ABGES TYPE STRING,
MBUHR TYPE STRING,
TDUHR TYPE STRING,
LDUHR TYPE STRING,
WAUHR TYPE STRING,
AULWE TYPE STRING,
HANDOVERDATE TYPE STRING,
HANDOVERTIME TYPE STRING,
DELIVERY_DATE_TYPE_RULE TYPE STRING,
DLVQTY_BU TYPE STRING,
DLVQTY_SU TYPE STRING,
OCDQTY_BU TYPE STRING,
OCDQTY_SU TYPE STRING,
ORDQTY_BU TYPE STRING,
ORDQTY_SU TYPE STRING,
CREA_DLVDATE TYPE STRING,
REQ_DLVDATE TYPE STRING,
BEDAR TYPE STRING,
_DATAAGING TYPE STRING,
WAERK TYPE STRING,
ODN_AMOUNT TYPE STRING,
HANDLE TYPE STRING,
LCCST TYPE STRING,
RRQQTY_BU TYPE STRING,
CRQQTY_BU TYPE STRING,
DUMMY_SLSDOCSCHEDL_INCL_EEW_PS TYPE STRING,
FSH_RALLOC_QTY TYPE STRING,
FSH_OS_ID TYPE STRING,
FSH_PQR_RC TYPE STRING,
MBDAT_DRS TYPE STRING,
OEIME TYPE STRING,
OEIKW TYPE STRING,
OEIKWGES TYPE STRING,
OEIKWAA TYPE STRING,
VSMNG_L TYPE STRING,
VSWRT_L TYPE STRING,
OLFMNG TYPE STRING,
WLDATBE TYPE STRING,
LFSTA TYPE STRING,
DUMMY TYPE STRING,
VSMNG TYPE STRING,
VSMNG_H TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCVBELB_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_MCVBELB_STR-SUPKZ sy-vline 
WA_MCVBELB_STR-MANDT sy-vline 
WA_MCVBELB_STR-VBELN sy-vline 
WA_MCVBELB_STR-POSNR sy-vline 
WA_MCVBELB_STR-ETENR sy-vline 
WA_MCVBELB_STR-ETTYP sy-vline 
WA_MCVBELB_STR-LFREL sy-vline 
WA_MCVBELB_STR-EDATU sy-vline 
WA_MCVBELB_STR-EZEIT sy-vline 
WA_MCVBELB_STR-WMENG sy-vline 
WA_MCVBELB_STR-BMENG sy-vline 
WA_MCVBELB_STR-VRKME sy-vline 
WA_MCVBELB_STR-LMENG sy-vline 
WA_MCVBELB_STR-MEINS sy-vline 
WA_MCVBELB_STR-BDDAT sy-vline 
WA_MCVBELB_STR-BDART sy-vline 
WA_MCVBELB_STR-PLART sy-vline 
WA_MCVBELB_STR-VBELE sy-vline 
WA_MCVBELB_STR-POSNE sy-vline 
WA_MCVBELB_STR-ETENE sy-vline 
WA_MCVBELB_STR-RSDAT sy-vline 
WA_MCVBELB_STR-IDNNR sy-vline 
WA_MCVBELB_STR-BANFN sy-vline 
WA_MCVBELB_STR-BSART sy-vline 
WA_MCVBELB_STR-BSTYP sy-vline 
WA_MCVBELB_STR-WEPOS sy-vline 
WA_MCVBELB_STR-REPOS sy-vline 
WA_MCVBELB_STR-LRGDT sy-vline 
WA_MCVBELB_STR-PRGRS sy-vline 
WA_MCVBELB_STR-TDDAT sy-vline 
WA_MCVBELB_STR-MBDAT sy-vline 
WA_MCVBELB_STR-LDDAT sy-vline 
WA_MCVBELB_STR-WADAT sy-vline 
WA_MCVBELB_STR-CMENG sy-vline 
WA_MCVBELB_STR-LIFSP sy-vline 
WA_MCVBELB_STR-GRSTR sy-vline 
WA_MCVBELB_STR-ABART sy-vline 
WA_MCVBELB_STR-ABRUF sy-vline 
WA_MCVBELB_STR-ROMS1 sy-vline 
WA_MCVBELB_STR-ROMS2 sy-vline 
WA_MCVBELB_STR-ROMS3 sy-vline 
WA_MCVBELB_STR-ROMEI sy-vline 
WA_MCVBELB_STR-RFORM sy-vline 
WA_MCVBELB_STR-UMVKZ sy-vline 
WA_MCVBELB_STR-UMVKN sy-vline 
WA_MCVBELB_STR-VERFP sy-vline 
WA_MCVBELB_STR-BWART sy-vline 
WA_MCVBELB_STR-BNFPO sy-vline 
WA_MCVBELB_STR-ETART sy-vline 
WA_MCVBELB_STR-AUFNR sy-vline 
WA_MCVBELB_STR-PLNUM sy-vline 
WA_MCVBELB_STR-SERNR sy-vline 
WA_MCVBELB_STR-AESKD sy-vline 
WA_MCVBELB_STR-ABGES sy-vline 
WA_MCVBELB_STR-MBUHR sy-vline 
WA_MCVBELB_STR-TDUHR sy-vline 
WA_MCVBELB_STR-LDUHR sy-vline 
WA_MCVBELB_STR-WAUHR sy-vline 
WA_MCVBELB_STR-AULWE sy-vline 
WA_MCVBELB_STR-HANDOVERDATE sy-vline 
WA_MCVBELB_STR-HANDOVERTIME sy-vline 
WA_MCVBELB_STR-DELIVERY_DATE_TYPE_RULE sy-vline 
WA_MCVBELB_STR-DLVQTY_BU sy-vline 
WA_MCVBELB_STR-DLVQTY_SU sy-vline 
WA_MCVBELB_STR-OCDQTY_BU sy-vline 
WA_MCVBELB_STR-OCDQTY_SU sy-vline 
WA_MCVBELB_STR-ORDQTY_BU sy-vline 
WA_MCVBELB_STR-ORDQTY_SU sy-vline 
WA_MCVBELB_STR-CREA_DLVDATE sy-vline 
WA_MCVBELB_STR-REQ_DLVDATE sy-vline 
WA_MCVBELB_STR-BEDAR sy-vline 
WA_MCVBELB_STR-_DATAAGING sy-vline 
WA_MCVBELB_STR-WAERK sy-vline 
WA_MCVBELB_STR-ODN_AMOUNT sy-vline 
WA_MCVBELB_STR-HANDLE sy-vline 
WA_MCVBELB_STR-LCCST sy-vline 
WA_MCVBELB_STR-RRQQTY_BU sy-vline 
WA_MCVBELB_STR-CRQQTY_BU sy-vline 
WA_MCVBELB_STR-DUMMY_SLSDOCSCHEDL_INCL_EEW_PS sy-vline 
WA_MCVBELB_STR-FSH_RALLOC_QTY sy-vline 
WA_MCVBELB_STR-FSH_OS_ID sy-vline 
WA_MCVBELB_STR-FSH_PQR_RC sy-vline 
WA_MCVBELB_STR-MBDAT_DRS sy-vline 
WA_MCVBELB_STR-OEIME sy-vline 
WA_MCVBELB_STR-OEIKW sy-vline 
WA_MCVBELB_STR-OEIKWGES sy-vline 
WA_MCVBELB_STR-OEIKWAA sy-vline 
WA_MCVBELB_STR-VSMNG_L sy-vline 
WA_MCVBELB_STR-VSWRT_L sy-vline 
WA_MCVBELB_STR-OLFMNG sy-vline 
WA_MCVBELB_STR-WLDATBE sy-vline 
WA_MCVBELB_STR-LFSTA sy-vline 
WA_MCVBELB_STR-DUMMY sy-vline 
WA_MCVBELB_STR-VSMNG sy-vline 
WA_MCVBELB_STR-VSMNG_H sy-vline      INTO ld_text SEPARATED BY SPACE.

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