ABAP Select data from SAP table MCCPOS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCCPOS
*  INTO TABLE @DATA(IT_MCCPOS2).
*--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_MCCPOS INDEX 1 INTO DATA(WA_MCCPOS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCCPOS>-MANDT = 1.
<MCCPOS>-WERKS = 1.
<MCCPOS>-KSKRS = 1.
<MCCPOS>-KASNR = 1.
<MCCPOS>-BUDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCCPOS-BONNR, sy-vline,
  WA_MCCPOS-LFDNR, sy-vline,
  WA_MCCPOS-MATNR, sy-vline,
  WA_MCCPOS-MATKL, sy-vline,
  WA_MCCPOS-VKFNR, sy-vline,
  WA_MCCPOS-AKTNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCCPOS 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_MCCPOS 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_MCCPOS INTO WA_MCCPOS.


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

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

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

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

*Conversion exit EAN11, internal->external for field EANNR
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_MCCPOS-EANNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCCPOS-EANNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FRBNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCCPOS-FRBNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCCPOS-FRBNR.
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_MCCPOS_STR, 
MANDT TYPE STRING,
WERKS TYPE STRING,
KSKRS TYPE STRING,
KASNR TYPE STRING,
BUDAT TYPE STRING,
BONNR TYPE STRING,
LFDNR TYPE STRING,
MATNR TYPE STRING,
MATKL TYPE STRING,
VKFNR TYPE STRING,
AKTNR TYPE STRING,
KVORG TYPE STRING,
UMSGVP TYPE STRING,
UMSGVC TYPE STRING,
UMSGVO TYPE STRING,
UMSGEO TYPE STRING,
PRSNLS TYPE STRING,
PRVBT TYPE STRING,
UMSMNG TYPE STRING,
MEINS TYPE STRING,
VKMNG TYPE STRING,
VRKME TYPE STRING,
SUPKZ TYPE STRING,
EANNR TYPE STRING,
UMART TYPE STRING,
VKGRP TYPE STRING,
PDIFF TYPE STRING,
ANZPOS TYPE STRING,
ANZCOND TYPE STRING,
SERNR TYPE STRING,
DUMMY TYPE STRING,
TABIX TYPE STRING,
DUMMY_ENTRY TYPE STRING,
VORGA TYPE STRING,
FRBNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCCPOS_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_MCCPOS_STR-MANDT sy-vline 
WA_MCCPOS_STR-WERKS sy-vline 
WA_MCCPOS_STR-KSKRS sy-vline 
WA_MCCPOS_STR-KASNR sy-vline 
WA_MCCPOS_STR-BUDAT sy-vline 
WA_MCCPOS_STR-BONNR sy-vline 
WA_MCCPOS_STR-LFDNR sy-vline 
WA_MCCPOS_STR-MATNR sy-vline 
WA_MCCPOS_STR-MATKL sy-vline 
WA_MCCPOS_STR-VKFNR sy-vline 
WA_MCCPOS_STR-AKTNR sy-vline 
WA_MCCPOS_STR-KVORG sy-vline 
WA_MCCPOS_STR-UMSGVP sy-vline 
WA_MCCPOS_STR-UMSGVC sy-vline 
WA_MCCPOS_STR-UMSGVO sy-vline 
WA_MCCPOS_STR-UMSGEO sy-vline 
WA_MCCPOS_STR-PRSNLS sy-vline 
WA_MCCPOS_STR-PRVBT sy-vline 
WA_MCCPOS_STR-UMSMNG sy-vline 
WA_MCCPOS_STR-MEINS sy-vline 
WA_MCCPOS_STR-VKMNG sy-vline 
WA_MCCPOS_STR-VRKME sy-vline 
WA_MCCPOS_STR-SUPKZ sy-vline 
WA_MCCPOS_STR-EANNR sy-vline 
WA_MCCPOS_STR-UMART sy-vline 
WA_MCCPOS_STR-VKGRP sy-vline 
WA_MCCPOS_STR-PDIFF sy-vline 
WA_MCCPOS_STR-ANZPOS sy-vline 
WA_MCCPOS_STR-ANZCOND sy-vline 
WA_MCCPOS_STR-SERNR sy-vline 
WA_MCCPOS_STR-DUMMY sy-vline 
WA_MCCPOS_STR-TABIX sy-vline 
WA_MCCPOS_STR-DUMMY_ENTRY sy-vline 
WA_MCCPOS_STR-VORGA sy-vline 
WA_MCCPOS_STR-FRBNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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