ABAP Select data from SAP table MPES_COMP_GM_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPES_COMP_GM_ITEM
*  INTO TABLE @DATA(IT_MPES_COMP_GM_ITEM2).
*--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_MPES_COMP_GM_ITEM INDEX 1 INTO DATA(WA_MPES_COMP_GM_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPES_COMP_GM_ITEM>-MBLPO = 1.
<MPES_COMP_GM_ITEM>-BWART = 1.
<MPES_COMP_GM_ITEM>-MATNR = 1.
<MPES_COMP_GM_ITEM>-WERKS = 1.
<MPES_COMP_GM_ITEM>-LGORT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPES_COMP_GM_ITEM-CHARG, sy-vline,
  WA_MPES_COMP_GM_ITEM-SOBKZ, sy-vline,
  WA_MPES_COMP_GM_ITEM-KZBEW, sy-vline,
  WA_MPES_COMP_GM_ITEM-ERFMG, sy-vline,
  WA_MPES_COMP_GM_ITEM-ERFME, sy-vline,
  WA_MPES_COMP_GM_ITEM-UMREZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPES_COMP_GM_ITEM 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_MPES_COMP_GM_ITEM 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_MPES_COMP_GM_ITEM INTO WA_MPES_COMP_GM_ITEM.


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

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

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

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MPES_COMP_GM_ITEM-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPES_COMP_GM_ITEM-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MPES_COMP_GM_ITEM-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPES_COMP_GM_ITEM-MEINS.
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_MPES_COMP_GM_ITEM_STR, 
MBLPO TYPE STRING,
BWART TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
KZBEW TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
KZEAR TYPE STRING,
AUFNR TYPE STRING,
AUTYP TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
PS_PSP_PNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
BDMNG TYPE STRING,
MEINS TYPE STRING,
ENMNG TYPE STRING,
SHKZG TYPE STRING,
RSHKZ TYPE STRING,
PRVBE TYPE STRING,
INSMK TYPE STRING,
SERNP TYPE STRING,
SFI_ID TYPE STRING,
ADOC_NUMBER TYPE STRING,
ADOC_ITEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPES_COMP_GM_ITEM_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_MPES_COMP_GM_ITEM_STR-MBLPO sy-vline 
WA_MPES_COMP_GM_ITEM_STR-BWART sy-vline 
WA_MPES_COMP_GM_ITEM_STR-MATNR sy-vline 
WA_MPES_COMP_GM_ITEM_STR-WERKS sy-vline 
WA_MPES_COMP_GM_ITEM_STR-LGORT sy-vline 
WA_MPES_COMP_GM_ITEM_STR-CHARG sy-vline 
WA_MPES_COMP_GM_ITEM_STR-SOBKZ sy-vline 
WA_MPES_COMP_GM_ITEM_STR-KZBEW sy-vline 
WA_MPES_COMP_GM_ITEM_STR-ERFMG sy-vline 
WA_MPES_COMP_GM_ITEM_STR-ERFME sy-vline 
WA_MPES_COMP_GM_ITEM_STR-UMREZ sy-vline 
WA_MPES_COMP_GM_ITEM_STR-UMREN sy-vline 
WA_MPES_COMP_GM_ITEM_STR-RSNUM sy-vline 
WA_MPES_COMP_GM_ITEM_STR-RSPOS sy-vline 
WA_MPES_COMP_GM_ITEM_STR-RSART sy-vline 
WA_MPES_COMP_GM_ITEM_STR-KZEAR sy-vline 
WA_MPES_COMP_GM_ITEM_STR-AUFNR sy-vline 
WA_MPES_COMP_GM_ITEM_STR-AUTYP sy-vline 
WA_MPES_COMP_GM_ITEM_STR-AUFPL sy-vline 
WA_MPES_COMP_GM_ITEM_STR-APLZL sy-vline 
WA_MPES_COMP_GM_ITEM_STR-PS_PSP_PNR sy-vline 
WA_MPES_COMP_GM_ITEM_STR-KDAUF sy-vline 
WA_MPES_COMP_GM_ITEM_STR-KDPOS sy-vline 
WA_MPES_COMP_GM_ITEM_STR-KDEIN sy-vline 
WA_MPES_COMP_GM_ITEM_STR-BDMNG sy-vline 
WA_MPES_COMP_GM_ITEM_STR-MEINS sy-vline 
WA_MPES_COMP_GM_ITEM_STR-ENMNG sy-vline 
WA_MPES_COMP_GM_ITEM_STR-SHKZG sy-vline 
WA_MPES_COMP_GM_ITEM_STR-RSHKZ sy-vline 
WA_MPES_COMP_GM_ITEM_STR-PRVBE sy-vline 
WA_MPES_COMP_GM_ITEM_STR-INSMK sy-vline 
WA_MPES_COMP_GM_ITEM_STR-SERNP sy-vline 
WA_MPES_COMP_GM_ITEM_STR-SFI_ID sy-vline 
WA_MPES_COMP_GM_ITEM_STR-ADOC_NUMBER sy-vline 
WA_MPES_COMP_GM_ITEM_STR-ADOC_ITEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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