ABAP Select data from SAP table MC45W_2ITM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MC45W_2ITM 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 MC45W_2ITM. 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 MC45W_2ITM 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_MC45W_2ITM TYPE STANDARD TABLE OF MC45W_2ITM,
      WA_MC45W_2ITM TYPE MC45W_2ITM,
      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: <MC45W_2ITM> TYPE MC45W_2ITM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MC45W_2ITM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MC45W_2ITM
  INTO TABLE IT_MC45W_2ITM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MC45W_2ITM
*  INTO TABLE @DATA(IT_MC45W_2ITM2).
*--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_MC45W_2ITM INDEX 1 INTO DATA(WA_MC45W_2ITM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MC45W_2ITM ASSIGNING <MC45W_2ITM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MC45W_2ITM>-AKTNR = 1.
<MC45W_2ITM>-BONBA = 1.
<MC45W_2ITM>-BONBAD = 1.
<MC45W_2ITM>-BRGEW = 1.
<MC45W_2ITM>-BRTWR = 1.

ENDLOOP.

LOOP AT IT_MC45W_2ITM INTO WA_MC45W_2ITM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MC45W_2ITM-BRTWRD, sy-vline,
  WA_MC45W_2ITM-CHARG, sy-vline,
  WA_MC45W_2ITM-CONTRACT, sy-vline,
  WA_MC45W_2ITM-CONTRACT_TYPE, sy-vline,
  WA_MC45W_2ITM-EFFWR, sy-vline,
  WA_MC45W_2ITM-EFFWRD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MC45W_2ITM 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_MC45W_2ITM 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_MC45W_2ITM INTO WA_MC45W_2ITM.


*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 AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-AKTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-CONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-CONTRACT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field FPRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-FPRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-FPRME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOLIF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-KOLIF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-KOLIF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATBF
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-MATBF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-MATBF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STAFO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-STAFO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-STAFO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VOLEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-VOLEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-VOLEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-WBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WFKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_2ITM-WFKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_2ITM-WFKME.
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_MC45W_2ITM_STR, 
AKTNR TYPE STRING,
BONBA TYPE STRING,
BONBAD TYPE STRING,
BRGEW TYPE STRING,
BRTWR TYPE STRING,
BRTWRD TYPE STRING,
CHARG TYPE STRING,
CONTRACT TYPE STRING,
CONTRACT_TYPE TYPE STRING,
EFFWR TYPE STRING,
EFFWRD TYPE STRING,
EKKOL TYPE STRING,
ERDAT TYPE STRING,
FPRME TYPE STRING,
FPUMN TYPE STRING,
FPUMZ TYPE STRING,
GEWEI TYPE STRING,
GSBER TYPE STRING,
ITEMCAT TYPE STRING,
KOKRS TYPE STRING,
KOLIF TYPE STRING,
KOSTL TYPE STRING,
KZWI1 TYPE STRING,
KZWI1D TYPE STRING,
KZWI2 TYPE STRING,
KZWI2D TYPE STRING,
KZWI3 TYPE STRING,
KZWI3D TYPE STRING,
KZWI4 TYPE STRING,
KZWI4D TYPE STRING,
KZWI5 TYPE STRING,
KZWI5D TYPE STRING,
KZWI6 TYPE STRING,
KZWI6D TYPE STRING,
LFGRU TYPE STRING,
LTSNR TYPE STRING,
MATBF TYPE STRING,
MATKL TYPE STRING,
MATNR TYPE STRING,
MEINS TYPE STRING,
MENGE TYPE STRING,
MTART TYPE STRING,
MWERT_IM TYPE STRING,
MWERT_PR TYPE STRING,
MWERT_UM TYPE STRING,
MWSBP TYPE STRING,
MWSBPD TYPE STRING,
MWSK2 TYPE STRING,
MWSKZ TYPE STRING,
NAVNW TYPE STRING,
NETWR TYPE STRING,
NETWRD TYPE STRING,
NTGEW TYPE STRING,
PEINH TYPE STRING,
POSNR TYPE STRING,
PRCTR TYPE STRING,
PRSDT TYPE STRING,
SKFBP TYPE STRING,
SKFBPD TYPE STRING,
STAFO TYPE STRING,
TXJCD TYPE STRING,
UMREN TYPE STRING,
UMREZ TYPE STRING,
VOLEH TYPE STRING,
VOLUM TYPE STRING,
WBELN TYPE STRING,
WBELN_V TYPE STRING,
WERKS TYPE STRING,
WFKME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MC45W_2ITM_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_MC45W_2ITM_STR-AKTNR sy-vline 
WA_MC45W_2ITM_STR-BONBA sy-vline 
WA_MC45W_2ITM_STR-BONBAD sy-vline 
WA_MC45W_2ITM_STR-BRGEW sy-vline 
WA_MC45W_2ITM_STR-BRTWR sy-vline 
WA_MC45W_2ITM_STR-BRTWRD sy-vline 
WA_MC45W_2ITM_STR-CHARG sy-vline 
WA_MC45W_2ITM_STR-CONTRACT sy-vline 
WA_MC45W_2ITM_STR-CONTRACT_TYPE sy-vline 
WA_MC45W_2ITM_STR-EFFWR sy-vline 
WA_MC45W_2ITM_STR-EFFWRD sy-vline 
WA_MC45W_2ITM_STR-EKKOL sy-vline 
WA_MC45W_2ITM_STR-ERDAT sy-vline 
WA_MC45W_2ITM_STR-FPRME sy-vline 
WA_MC45W_2ITM_STR-FPUMN sy-vline 
WA_MC45W_2ITM_STR-FPUMZ sy-vline 
WA_MC45W_2ITM_STR-GEWEI sy-vline 
WA_MC45W_2ITM_STR-GSBER sy-vline 
WA_MC45W_2ITM_STR-ITEMCAT sy-vline 
WA_MC45W_2ITM_STR-KOKRS sy-vline 
WA_MC45W_2ITM_STR-KOLIF sy-vline 
WA_MC45W_2ITM_STR-KOSTL sy-vline 
WA_MC45W_2ITM_STR-KZWI1 sy-vline 
WA_MC45W_2ITM_STR-KZWI1D sy-vline 
WA_MC45W_2ITM_STR-KZWI2 sy-vline 
WA_MC45W_2ITM_STR-KZWI2D sy-vline 
WA_MC45W_2ITM_STR-KZWI3 sy-vline 
WA_MC45W_2ITM_STR-KZWI3D sy-vline 
WA_MC45W_2ITM_STR-KZWI4 sy-vline 
WA_MC45W_2ITM_STR-KZWI4D sy-vline 
WA_MC45W_2ITM_STR-KZWI5 sy-vline 
WA_MC45W_2ITM_STR-KZWI5D sy-vline 
WA_MC45W_2ITM_STR-KZWI6 sy-vline 
WA_MC45W_2ITM_STR-KZWI6D sy-vline 
WA_MC45W_2ITM_STR-LFGRU sy-vline 
WA_MC45W_2ITM_STR-LTSNR sy-vline 
WA_MC45W_2ITM_STR-MATBF sy-vline 
WA_MC45W_2ITM_STR-MATKL sy-vline 
WA_MC45W_2ITM_STR-MATNR sy-vline 
WA_MC45W_2ITM_STR-MEINS sy-vline 
WA_MC45W_2ITM_STR-MENGE sy-vline 
WA_MC45W_2ITM_STR-MTART sy-vline 
WA_MC45W_2ITM_STR-MWERT_IM sy-vline 
WA_MC45W_2ITM_STR-MWERT_PR sy-vline 
WA_MC45W_2ITM_STR-MWERT_UM sy-vline 
WA_MC45W_2ITM_STR-MWSBP sy-vline 
WA_MC45W_2ITM_STR-MWSBPD sy-vline 
WA_MC45W_2ITM_STR-MWSK2 sy-vline 
WA_MC45W_2ITM_STR-MWSKZ sy-vline 
WA_MC45W_2ITM_STR-NAVNW sy-vline 
WA_MC45W_2ITM_STR-NETWR sy-vline 
WA_MC45W_2ITM_STR-NETWRD sy-vline 
WA_MC45W_2ITM_STR-NTGEW sy-vline 
WA_MC45W_2ITM_STR-PEINH sy-vline 
WA_MC45W_2ITM_STR-POSNR sy-vline 
WA_MC45W_2ITM_STR-PRCTR sy-vline 
WA_MC45W_2ITM_STR-PRSDT sy-vline 
WA_MC45W_2ITM_STR-SKFBP sy-vline 
WA_MC45W_2ITM_STR-SKFBPD sy-vline 
WA_MC45W_2ITM_STR-STAFO sy-vline 
WA_MC45W_2ITM_STR-TXJCD sy-vline 
WA_MC45W_2ITM_STR-UMREN sy-vline 
WA_MC45W_2ITM_STR-UMREZ sy-vline 
WA_MC45W_2ITM_STR-VOLEH sy-vline 
WA_MC45W_2ITM_STR-VOLUM sy-vline 
WA_MC45W_2ITM_STR-WBELN sy-vline 
WA_MC45W_2ITM_STR-WBELN_V sy-vline 
WA_MC45W_2ITM_STR-WERKS sy-vline 
WA_MC45W_2ITM_STR-WFKME sy-vline      INTO ld_text SEPARATED BY SPACE.

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