ABAP Select data from SAP table MCAFVGV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCAFVGV
*  INTO TABLE @DATA(IT_MCAFVGV2).
*--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_MCAFVGV INDEX 1 INTO DATA(WA_MCAFVGV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCAFVGV>-MANDT = 1.
<MCAFVGV>-SSOUR = 1.
<MCAFVGV>-VRSIO = 1.
<MCAFVGV>-AUFNR = 1.
<MCAFVGV>-AUFPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCAFVGV-APLZL, sy-vline,
  WA_MCAFVGV-ZAEHL, sy-vline,
  WA_MCAFVGV-PLNFL, sy-vline,
  WA_MCAFVGV-VORNR, sy-vline,
  WA_MCAFVGV-ARBID, sy-vline,
  WA_MCAFVGV-KAPAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCAFVGV 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_MCAFVGV 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_MCAFVGV INTO WA_MCAFVGV.


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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MCAFVGV-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCAFVGV-VORNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field DFZEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MCAFVGV-DFZEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCAFVGV-DFZEH.
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_MCAFVGV_STR, 
MANDT TYPE STRING,
SSOUR TYPE STRING,
VRSIO TYPE STRING,
AUFNR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
ZAEHL TYPE STRING,
PLNFL TYPE STRING,
VORNR TYPE STRING,
ARBID TYPE STRING,
KAPAR TYPE STRING,
KAPID TYPE STRING,
ARBPL TYPE STRING,
WERKS TYPE STRING,
STEUS TYPE STRING,
OBJNR TYPE STRING,
MEINH TYPE STRING,
UMREN TYPE STRING,
UMREZ TYPE STRING,
BMSCH TYPE STRING,
VERTL TYPE STRING,
KALID TYPE STRING,
MGVRG TYPE STRING,
ASVRG TYPE STRING,
LMNGA TYPE STRING,
XMNGA TYPE STRING,
GMNGA TYPE STRING,
SSADD TYPE STRING,
IADD TYPE STRING,
FSAVD TYPE STRING,
SSAVD TYPE STRING,
ISDD TYPE STRING,
ISAVD TYPE STRING,
FSEDD TYPE STRING,
SSEDD TYPE STRING,
IEDD TYPE STRING,
IEAVD TYPE STRING,
N_IEAVD TYPE STRING,
WARTZ TYPE STRING,
WRTZE TYPE STRING,
RUEST TYPE STRING,
RSTZE TYPE STRING,
BEARZ TYPE STRING,
BEAZE TYPE STRING,
ABRUE TYPE STRING,
ARUZE TYPE STRING,
LIEGZ TYPE STRING,
V_LIEGZ TYPE STRING,
LIGZE TYPE STRING,
TRANZ TYPE STRING,
KRUES TYPE STRING,
KBEAS TYPE STRING,
KABRS TYPE STRING,
KEINH TYPE STRING,
TRAZE TYPE STRING,
DFZEH TYPE STRING,
S_DFZ TYPE STRING,
I_DFZ TYPE STRING,
KAPKZ TYPE STRING,
A TYPE STRING,
VDATU TYPE STRING,
DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCAFVGV_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_MCAFVGV_STR-MANDT sy-vline 
WA_MCAFVGV_STR-SSOUR sy-vline 
WA_MCAFVGV_STR-VRSIO sy-vline 
WA_MCAFVGV_STR-AUFNR sy-vline 
WA_MCAFVGV_STR-AUFPL sy-vline 
WA_MCAFVGV_STR-APLZL sy-vline 
WA_MCAFVGV_STR-ZAEHL sy-vline 
WA_MCAFVGV_STR-PLNFL sy-vline 
WA_MCAFVGV_STR-VORNR sy-vline 
WA_MCAFVGV_STR-ARBID sy-vline 
WA_MCAFVGV_STR-KAPAR sy-vline 
WA_MCAFVGV_STR-KAPID sy-vline 
WA_MCAFVGV_STR-ARBPL sy-vline 
WA_MCAFVGV_STR-WERKS sy-vline 
WA_MCAFVGV_STR-STEUS sy-vline 
WA_MCAFVGV_STR-OBJNR sy-vline 
WA_MCAFVGV_STR-MEINH sy-vline 
WA_MCAFVGV_STR-UMREN sy-vline 
WA_MCAFVGV_STR-UMREZ sy-vline 
WA_MCAFVGV_STR-BMSCH sy-vline 
WA_MCAFVGV_STR-VERTL sy-vline 
WA_MCAFVGV_STR-KALID sy-vline 
WA_MCAFVGV_STR-MGVRG sy-vline 
WA_MCAFVGV_STR-ASVRG sy-vline 
WA_MCAFVGV_STR-LMNGA sy-vline 
WA_MCAFVGV_STR-XMNGA sy-vline 
WA_MCAFVGV_STR-GMNGA sy-vline 
WA_MCAFVGV_STR-SSADD sy-vline 
WA_MCAFVGV_STR-IADD sy-vline 
WA_MCAFVGV_STR-FSAVD sy-vline 
WA_MCAFVGV_STR-SSAVD sy-vline 
WA_MCAFVGV_STR-ISDD sy-vline 
WA_MCAFVGV_STR-ISAVD sy-vline 
WA_MCAFVGV_STR-FSEDD sy-vline 
WA_MCAFVGV_STR-SSEDD sy-vline 
WA_MCAFVGV_STR-IEDD sy-vline 
WA_MCAFVGV_STR-IEAVD sy-vline 
WA_MCAFVGV_STR-N_IEAVD sy-vline 
WA_MCAFVGV_STR-WARTZ sy-vline 
WA_MCAFVGV_STR-WRTZE sy-vline 
WA_MCAFVGV_STR-RUEST sy-vline 
WA_MCAFVGV_STR-RSTZE sy-vline 
WA_MCAFVGV_STR-BEARZ sy-vline 
WA_MCAFVGV_STR-BEAZE sy-vline 
WA_MCAFVGV_STR-ABRUE sy-vline 
WA_MCAFVGV_STR-ARUZE sy-vline 
WA_MCAFVGV_STR-LIEGZ sy-vline 
WA_MCAFVGV_STR-V_LIEGZ sy-vline 
WA_MCAFVGV_STR-LIGZE sy-vline 
WA_MCAFVGV_STR-TRANZ sy-vline 
WA_MCAFVGV_STR-KRUES sy-vline 
WA_MCAFVGV_STR-KBEAS sy-vline 
WA_MCAFVGV_STR-KABRS sy-vline 
WA_MCAFVGV_STR-KEINH sy-vline 
WA_MCAFVGV_STR-TRAZE sy-vline 
WA_MCAFVGV_STR-DFZEH sy-vline 
WA_MCAFVGV_STR-S_DFZ sy-vline 
WA_MCAFVGV_STR-I_DFZ sy-vline 
WA_MCAFVGV_STR-KAPKZ sy-vline 
WA_MCAFVGV_STR-A sy-vline 
WA_MCAFVGV_STR-VDATU sy-vline 
WA_MCAFVGV_STR-DUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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