ABAP Select data from SAP table MCWMITADD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCWMITADD
*  INTO TABLE @DATA(IT_MCWMITADD2).
*--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_MCWMITADD INDEX 1 INTO DATA(WA_MCWMITADD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCWMITADD>-TB_ELIKZ = 1.
<MCWMITADD>-TB_MENGE = 1.
<MCWMITADD>-TB_MEINS = 1.
<MCWMITADD>-TB_MENGA = 1.
<MCWMITADD>-TB_ALTME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCWMITADD-TB_TAMEN, sy-vline,
  WA_MCWMITADD-TB_TAMEA, sy-vline,
  WA_MCWMITADD-TB_AOFTA, sy-vline,
  WA_MCWMITADD-TB_AGSTA, sy-vline,
  WA_MCWMITADD-TB_BRGEW, sy-vline,
  WA_MCWMITADD-TB_GEWEI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCWMITADD 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_MCWMITADD 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_MCWMITADD INTO WA_MCWMITADD.


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

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

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

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

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

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

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

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

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

*Conversion exit GJAHR, internal->external for field MB_MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MCWMITADD-MB_MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCWMITADD-MB_MJAHR.
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_MCWMITADD_STR, 
TB_ELIKZ TYPE STRING,
TB_MENGE TYPE STRING,
TB_MEINS TYPE STRING,
TB_MENGA TYPE STRING,
TB_ALTME TYPE STRING,
TB_TAMEN TYPE STRING,
TB_TAMEA TYPE STRING,
TB_AOFTA TYPE STRING,
TB_AGSTA TYPE STRING,
TB_BRGEW TYPE STRING,
TB_GEWEI TYPE STRING,
VB_SORTKRI TYPE STRING,
VB_LFIMG TYPE STRING,
VB_LGMNG TYPE STRING,
VB_KOMNG TYPE STRING,
VB_MEINS TYPE STRING,
VB_VRKME TYPE STRING,
VB_UMVKZ TYPE STRING,
VB_UMVKN TYPE STRING,
VB_MBDAT TYPE STRING,
VB_VGTYP TYPE STRING,
VB_BRGEW TYPE STRING,
VB_NTGEW TYPE STRING,
VB_GEWEI TYPE STRING,
VB_VOLUM TYPE STRING,
VB_VOLEH TYPE STRING,
BUKRS TYPE STRING,
MG_LAGKL TYPE STRING,
BASME TYPE STRING,
MB_MBLNR TYPE STRING,
MB_MJAHR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCWMITADD_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_MCWMITADD_STR-TB_ELIKZ sy-vline 
WA_MCWMITADD_STR-TB_MENGE sy-vline 
WA_MCWMITADD_STR-TB_MEINS sy-vline 
WA_MCWMITADD_STR-TB_MENGA sy-vline 
WA_MCWMITADD_STR-TB_ALTME sy-vline 
WA_MCWMITADD_STR-TB_TAMEN sy-vline 
WA_MCWMITADD_STR-TB_TAMEA sy-vline 
WA_MCWMITADD_STR-TB_AOFTA sy-vline 
WA_MCWMITADD_STR-TB_AGSTA sy-vline 
WA_MCWMITADD_STR-TB_BRGEW sy-vline 
WA_MCWMITADD_STR-TB_GEWEI sy-vline 
WA_MCWMITADD_STR-VB_SORTKRI sy-vline 
WA_MCWMITADD_STR-VB_LFIMG sy-vline 
WA_MCWMITADD_STR-VB_LGMNG sy-vline 
WA_MCWMITADD_STR-VB_KOMNG sy-vline 
WA_MCWMITADD_STR-VB_MEINS sy-vline 
WA_MCWMITADD_STR-VB_VRKME sy-vline 
WA_MCWMITADD_STR-VB_UMVKZ sy-vline 
WA_MCWMITADD_STR-VB_UMVKN sy-vline 
WA_MCWMITADD_STR-VB_MBDAT sy-vline 
WA_MCWMITADD_STR-VB_VGTYP sy-vline 
WA_MCWMITADD_STR-VB_BRGEW sy-vline 
WA_MCWMITADD_STR-VB_NTGEW sy-vline 
WA_MCWMITADD_STR-VB_GEWEI sy-vline 
WA_MCWMITADD_STR-VB_VOLUM sy-vline 
WA_MCWMITADD_STR-VB_VOLEH sy-vline 
WA_MCWMITADD_STR-BUKRS sy-vline 
WA_MCWMITADD_STR-MG_LAGKL sy-vline 
WA_MCWMITADD_STR-BASME sy-vline 
WA_MCWMITADD_STR-MB_MBLNR sy-vline 
WA_MCWMITADD_STR-MB_MJAHR sy-vline      INTO ld_text SEPARATED BY SPACE.

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