ABAP Select data from SAP table MCCOMVFKP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCCOMVFKP
*  INTO TABLE @DATA(IT_MCCOMVFKP2).
*--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_MCCOMVFKP INDEX 1 INTO DATA(WA_MCCOMVFKP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCCOMVFKP>-MANDT = 1.
<MCCOMVFKP>-FKNUM = 1.
<MCCOMVFKP>-FKPOS = 1.
<MCCOMVFKP>-FKPTY = 1.
<MCCOMVFKP>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCCOMVFKP-NETWR, sy-vline,
  WA_MCCOMVFKP-MWSBP, sy-vline,
  WA_MCCOMVFKP-WAERS, sy-vline,
  WA_MCCOMVFKP-MWSKZ, sy-vline,
  WA_MCCOMVFKP-PRSDT, sy-vline,
  WA_MCCOMVFKP-BUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCCOMVFKP 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_MCCOMVFKP 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_MCCOMVFKP INTO WA_MCCOMVFKP.


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

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

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

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_MCCOMVFKP-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCCOMVFKP-PARVW.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCCOMVFKP-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCCOMVFKP-LOGSYS.
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_MCCOMVFKP_STR, 
MANDT TYPE STRING,
FKNUM TYPE STRING,
FKPOS TYPE STRING,
FKPTY TYPE STRING,
BUKRS TYPE STRING,
NETWR TYPE STRING,
MWSBP TYPE STRING,
WAERS TYPE STRING,
MWSKZ TYPE STRING,
PRSDT TYPE STRING,
BUDAT TYPE STRING,
EXTI1 TYPE STRING,
EXTI2 TYPE STRING,
TPLST TYPE STRING,
VSART TYPE STRING,
KALSM TYPE STRING,
KNUMV TYPE STRING,
WERKS TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LBLNI TYPE STRING,
PARVW TYPE STRING,
TDLNR TYPE STRING,
RECHS TYPE STRING,
KURST TYPE STRING,
KOSTY TYPE STRING,
REFTY TYPE STRING,
REBEL TYPE STRING,
REPOS TYPE STRING,
POSTX TYPE STRING,
KNTTP TYPE STRING,
BKLAS TYPE STRING,
STBER TYPE STRING,
DTBER TYPE STRING,
UZBER TYPE STRING,
STFRE TYPE STRING,
DTFRE TYPE STRING,
UZFRE TYPE STRING,
STABR TYPE STRING,
DTABR TYPE STRING,
UZABR TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AEZET TYPE STRING,
LOGSYS TYPE STRING,
KSTAU TYPE STRING,
TRFZNA TYPE STRING,
TRFZNZ TYPE STRING,
TXJCD TYPE STRING,
BASWR TYPE STRING,
SLAND1_A TYPE STRING,
SLAND1_Z TYPE STRING,
FKSTO TYPE STRING,
KZWI1 TYPE STRING,
KZWI2 TYPE STRING,
KZWI3 TYPE STRING,
KZWI4 TYPE STRING,
KZWI5 TYPE STRING,
KZWI6 TYPE STRING,
SLFREI TYPE STRING,
SLSTOR TYPE STRING,
KPOSNL TYPE STRING,
STDAT TYPE STRING,
VIM_MARKED TYPE STRING,
UPDKZ TYPE STRING,
INCON TYPE STRING,
SUPKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCCOMVFKP_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_MCCOMVFKP_STR-MANDT sy-vline 
WA_MCCOMVFKP_STR-FKNUM sy-vline 
WA_MCCOMVFKP_STR-FKPOS sy-vline 
WA_MCCOMVFKP_STR-FKPTY sy-vline 
WA_MCCOMVFKP_STR-BUKRS sy-vline 
WA_MCCOMVFKP_STR-NETWR sy-vline 
WA_MCCOMVFKP_STR-MWSBP sy-vline 
WA_MCCOMVFKP_STR-WAERS sy-vline 
WA_MCCOMVFKP_STR-MWSKZ sy-vline 
WA_MCCOMVFKP_STR-PRSDT sy-vline 
WA_MCCOMVFKP_STR-BUDAT sy-vline 
WA_MCCOMVFKP_STR-EXTI1 sy-vline 
WA_MCCOMVFKP_STR-EXTI2 sy-vline 
WA_MCCOMVFKP_STR-TPLST sy-vline 
WA_MCCOMVFKP_STR-VSART sy-vline 
WA_MCCOMVFKP_STR-KALSM sy-vline 
WA_MCCOMVFKP_STR-KNUMV sy-vline 
WA_MCCOMVFKP_STR-WERKS sy-vline 
WA_MCCOMVFKP_STR-EKORG sy-vline 
WA_MCCOMVFKP_STR-EKGRP sy-vline 
WA_MCCOMVFKP_STR-EBELN sy-vline 
WA_MCCOMVFKP_STR-EBELP sy-vline 
WA_MCCOMVFKP_STR-LBLNI sy-vline 
WA_MCCOMVFKP_STR-PARVW sy-vline 
WA_MCCOMVFKP_STR-TDLNR sy-vline 
WA_MCCOMVFKP_STR-RECHS sy-vline 
WA_MCCOMVFKP_STR-KURST sy-vline 
WA_MCCOMVFKP_STR-KOSTY sy-vline 
WA_MCCOMVFKP_STR-REFTY sy-vline 
WA_MCCOMVFKP_STR-REBEL sy-vline 
WA_MCCOMVFKP_STR-REPOS sy-vline 
WA_MCCOMVFKP_STR-POSTX sy-vline 
WA_MCCOMVFKP_STR-KNTTP sy-vline 
WA_MCCOMVFKP_STR-BKLAS sy-vline 
WA_MCCOMVFKP_STR-STBER sy-vline 
WA_MCCOMVFKP_STR-DTBER sy-vline 
WA_MCCOMVFKP_STR-UZBER sy-vline 
WA_MCCOMVFKP_STR-STFRE sy-vline 
WA_MCCOMVFKP_STR-DTFRE sy-vline 
WA_MCCOMVFKP_STR-UZFRE sy-vline 
WA_MCCOMVFKP_STR-STABR sy-vline 
WA_MCCOMVFKP_STR-DTABR sy-vline 
WA_MCCOMVFKP_STR-UZABR sy-vline 
WA_MCCOMVFKP_STR-ERNAM sy-vline 
WA_MCCOMVFKP_STR-ERDAT sy-vline 
WA_MCCOMVFKP_STR-ERZET sy-vline 
WA_MCCOMVFKP_STR-AENAM sy-vline 
WA_MCCOMVFKP_STR-AEDAT sy-vline 
WA_MCCOMVFKP_STR-AEZET sy-vline 
WA_MCCOMVFKP_STR-LOGSYS sy-vline 
WA_MCCOMVFKP_STR-KSTAU sy-vline 
WA_MCCOMVFKP_STR-TRFZNA sy-vline 
WA_MCCOMVFKP_STR-TRFZNZ sy-vline 
WA_MCCOMVFKP_STR-TXJCD sy-vline 
WA_MCCOMVFKP_STR-BASWR sy-vline 
WA_MCCOMVFKP_STR-SLAND1_A sy-vline 
WA_MCCOMVFKP_STR-SLAND1_Z sy-vline 
WA_MCCOMVFKP_STR-FKSTO sy-vline 
WA_MCCOMVFKP_STR-KZWI1 sy-vline 
WA_MCCOMVFKP_STR-KZWI2 sy-vline 
WA_MCCOMVFKP_STR-KZWI3 sy-vline 
WA_MCCOMVFKP_STR-KZWI4 sy-vline 
WA_MCCOMVFKP_STR-KZWI5 sy-vline 
WA_MCCOMVFKP_STR-KZWI6 sy-vline 
WA_MCCOMVFKP_STR-SLFREI sy-vline 
WA_MCCOMVFKP_STR-SLSTOR sy-vline 
WA_MCCOMVFKP_STR-KPOSNL sy-vline 
WA_MCCOMVFKP_STR-STDAT sy-vline 
WA_MCCOMVFKP_STR-VIM_MARKED sy-vline 
WA_MCCOMVFKP_STR-UPDKZ sy-vline 
WA_MCCOMVFKP_STR-INCON sy-vline 
WA_MCCOMVFKP_STR-SUPKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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