ABAP Select data from SAP table MECONF_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MECONF_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 MECONF_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 MECONF_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_MECONF_ITEM TYPE STANDARD TABLE OF MECONF_ITEM,
      WA_MECONF_ITEM TYPE MECONF_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: <MECONF_ITEM> TYPE MECONF_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MECONF_ITEM
*  INTO TABLE @DATA(IT_MECONF_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_MECONF_ITEM INDEX 1 INTO DATA(WA_MECONF_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MECONF_ITEM>-EBELP = 1.
<MECONF_ITEM>-LOEKZ = 1.
<MECONF_ITEM>-MATNR = 1.
<MECONF_ITEM>-EMATN = 1.
<MECONF_ITEM>-EAN11 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MECONF_ITEM-WERKS, sy-vline,
  WA_MECONF_ITEM-LGORT, sy-vline,
  WA_MECONF_ITEM-MENGE, sy-vline,
  WA_MECONF_ITEM-MEINS, sy-vline,
  WA_MECONF_ITEM-BPRME, sy-vline,
  WA_MECONF_ITEM-PEINH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MECONF_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_MECONF_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_MECONF_ITEM INTO WA_MECONF_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_MECONF_ITEM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MECONF_ITEM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field EMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MECONF_ITEM-EMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MECONF_ITEM-EMATN.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field SERVICEPERFORMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MECONF_ITEM-SERVICEPERFORMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MECONF_ITEM-SERVICEPERFORMER.
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_MECONF_ITEM_STR, 
EBELP TYPE STRING,
LOEKZ TYPE STRING,
MATNR TYPE STRING,
EMATN TYPE STRING,
EAN11 TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
BPRME TYPE STRING,
PEINH TYPE STRING,
NETPR TYPE STRING,
WAERS TYPE STRING,
ABSKZ TYPE STRING,
IDNLF TYPE STRING,
KZABS TYPE STRING,
LABNR TYPE STRING,
EVERS TYPE STRING,
BSTAE TYPE STRING,
BWTAR TYPE STRING,
CHARG TYPE STRING,
LICHA TYPE STRING,
PSTYP TYPE STRING,
PRODUCTTYPE TYPE STRING,
SERVICEPERFORMER TYPE STRING,
EXPECTED_VALUE TYPE STRING,
LIMIT_AMOUNT TYPE STRING,
SGT_SCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MECONF_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_MECONF_ITEM_STR-EBELP sy-vline 
WA_MECONF_ITEM_STR-LOEKZ sy-vline 
WA_MECONF_ITEM_STR-MATNR sy-vline 
WA_MECONF_ITEM_STR-EMATN sy-vline 
WA_MECONF_ITEM_STR-EAN11 sy-vline 
WA_MECONF_ITEM_STR-WERKS sy-vline 
WA_MECONF_ITEM_STR-LGORT sy-vline 
WA_MECONF_ITEM_STR-MENGE sy-vline 
WA_MECONF_ITEM_STR-MEINS sy-vline 
WA_MECONF_ITEM_STR-BPRME sy-vline 
WA_MECONF_ITEM_STR-PEINH sy-vline 
WA_MECONF_ITEM_STR-NETPR sy-vline 
WA_MECONF_ITEM_STR-WAERS sy-vline 
WA_MECONF_ITEM_STR-ABSKZ sy-vline 
WA_MECONF_ITEM_STR-IDNLF sy-vline 
WA_MECONF_ITEM_STR-KZABS sy-vline 
WA_MECONF_ITEM_STR-LABNR sy-vline 
WA_MECONF_ITEM_STR-EVERS sy-vline 
WA_MECONF_ITEM_STR-BSTAE sy-vline 
WA_MECONF_ITEM_STR-BWTAR sy-vline 
WA_MECONF_ITEM_STR-CHARG sy-vline 
WA_MECONF_ITEM_STR-LICHA sy-vline 
WA_MECONF_ITEM_STR-PSTYP sy-vline 
WA_MECONF_ITEM_STR-PRODUCTTYPE sy-vline 
WA_MECONF_ITEM_STR-SERVICEPERFORMER sy-vline 
WA_MECONF_ITEM_STR-EXPECTED_VALUE sy-vline 
WA_MECONF_ITEM_STR-LIMIT_AMOUNT sy-vline 
WA_MECONF_ITEM_STR-SGT_SCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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