ABAP Select data from SAP table MDSM into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDSM 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 MDSM. 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 MDSM 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_MDSM TYPE STANDARD TABLE OF MDSM,
      WA_MDSM TYPE MDSM,
      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: <MDSM> TYPE MDSM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDSM
*  INTO TABLE @DATA(IT_MDSM2).
*--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_MDSM INDEX 1 INTO DATA(WA_MDSM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDSM>-MANDT = 1.
<MDSM>-SBNUM = 1.
<MDSM>-SBPOS = 1.
<MDSM>-SBART = 1.
<MDSM>-AUFST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDSM-AUFWG, sy-vline,
  WA_MDSM-POSNR, sy-vline,
  WA_MDSM-SORTF, sy-vline,
  WA_MDSM-PLSCN, sy-vline,
  WA_MDSM-MATNR, sy-vline,
  WA_MDSM-WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDSM 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_MDSM 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_MDSM INTO WA_MDSM.


*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 NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MDSM-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDSM-POSNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field LTXSP
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MDSM-LTXSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDSM-LTXSP.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit NUMCV, internal->external for field REVLV
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MDSM-REVLV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDSM-REVLV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MDSM-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDSM-STLNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MDSM-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDSM-VORNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit CUNIT, internal->external for field NLFMV
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDSM-NLFMV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDSM-NLFMV.
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_MDSM_STR, 
MANDT TYPE STRING,
SBNUM TYPE STRING,
SBPOS TYPE STRING,
SBART TYPE STRING,
AUFST TYPE STRING,
AUFWG TYPE STRING,
POSNR TYPE STRING,
SORTF TYPE STRING,
PLSCN TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
PRVBE TYPE STRING,
BDART TYPE STRING,
POSTP TYPE STRING,
UPSKZ TYPE STRING,
SCHGT TYPE STRING,
TXTPS TYPE STRING,
INPOS TYPE STRING,
DUMPS TYPE STRING,
KFPOS TYPE STRING,
NODSP TYPE STRING,
DBSKZ TYPE STRING,
BDMNG TYPE STRING,
MEINS TYPE STRING,
ESMNG TYPE STRING,
SHKZG TYPE STRING,
BEIKZ TYPE STRING,
ERSKZ TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
FMENG TYPE STRING,
ALPOS TYPE STRING,
EWAHR TYPE STRING,
ALPGR TYPE STRING,
ALPRF TYPE STRING,
ALPST TYPE STRING,
AUSCH TYPE STRING,
AVOAU TYPE STRING,
NETAU TYPE STRING,
BDTER TYPE STRING,
SBTER TYPE STRING,
VERTI TYPE STRING,
NLFZT TYPE STRING,
BDZTP TYPE STRING,
ROHPS TYPE STRING,
ROANZ TYPE STRING,
ROMEN TYPE STRING,
ROMEI TYPE STRING,
ROMS1 TYPE STRING,
ROMS2 TYPE STRING,
ROMS3 TYPE STRING,
RFORM TYPE STRING,
CUOBJ TYPE STRING,
NFPKZ TYPE STRING,
KZAUS TYPE STRING,
NFEAG TYPE STRING,
NFGRP TYPE STRING,
NAFKZ TYPE STRING,
NOMNG TYPE STRING,
NOMAT TYPE STRING,
NFUML TYPE STRING,
LTXSP TYPE STRING,
POTX1 TYPE STRING,
POTX2 TYPE STRING,
PLNUM TYPE STRING,
BAUGR TYPE STRING,
BAUST TYPE STRING,
BAUWG TYPE STRING,
SERNR TYPE STRING,
AENNR TYPE STRING,
REVLV TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLKN TYPE STRING,
STPOZ TYPE STRING,
OBJNR TYPE STRING,
FLGAT TYPE STRING,
PLNFL TYPE STRING,
VORNR TYPE STRING,
APLZL TYPE STRING,
STVKN TYPE STRING,
VRPLA TYPE STRING,
PBDNR TYPE STRING,
KNTTP TYPE STRING,
SOBKZ TYPE STRING,
KZVBR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
PSPEL TYPE STRING,
CLAKZ TYPE STRING,
SANKA TYPE STRING,
KZKUP TYPE STRING,
STLAL TYPE STRING,
TECHS TYPE STRING,
LIFNR TYPE STRING,
EDGNO TYPE STRING,
NLFZV TYPE STRING,
NLFMV TYPE STRING,
KZBWS TYPE STRING,
BOM_VERSN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDSM_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_MDSM_STR-MANDT sy-vline 
WA_MDSM_STR-SBNUM sy-vline 
WA_MDSM_STR-SBPOS sy-vline 
WA_MDSM_STR-SBART sy-vline 
WA_MDSM_STR-AUFST sy-vline 
WA_MDSM_STR-AUFWG sy-vline 
WA_MDSM_STR-POSNR sy-vline 
WA_MDSM_STR-SORTF sy-vline 
WA_MDSM_STR-PLSCN sy-vline 
WA_MDSM_STR-MATNR sy-vline 
WA_MDSM_STR-WERKS sy-vline 
WA_MDSM_STR-LGORT sy-vline 
WA_MDSM_STR-PRVBE sy-vline 
WA_MDSM_STR-BDART sy-vline 
WA_MDSM_STR-POSTP sy-vline 
WA_MDSM_STR-UPSKZ sy-vline 
WA_MDSM_STR-SCHGT sy-vline 
WA_MDSM_STR-TXTPS sy-vline 
WA_MDSM_STR-INPOS sy-vline 
WA_MDSM_STR-DUMPS sy-vline 
WA_MDSM_STR-KFPOS sy-vline 
WA_MDSM_STR-NODSP sy-vline 
WA_MDSM_STR-DBSKZ sy-vline 
WA_MDSM_STR-BDMNG sy-vline 
WA_MDSM_STR-MEINS sy-vline 
WA_MDSM_STR-ESMNG sy-vline 
WA_MDSM_STR-SHKZG sy-vline 
WA_MDSM_STR-BEIKZ sy-vline 
WA_MDSM_STR-ERSKZ sy-vline 
WA_MDSM_STR-ERFMG sy-vline 
WA_MDSM_STR-ERFME sy-vline 
WA_MDSM_STR-UMREZ sy-vline 
WA_MDSM_STR-UMREN sy-vline 
WA_MDSM_STR-FMENG sy-vline 
WA_MDSM_STR-ALPOS sy-vline 
WA_MDSM_STR-EWAHR sy-vline 
WA_MDSM_STR-ALPGR sy-vline 
WA_MDSM_STR-ALPRF sy-vline 
WA_MDSM_STR-ALPST sy-vline 
WA_MDSM_STR-AUSCH sy-vline 
WA_MDSM_STR-AVOAU sy-vline 
WA_MDSM_STR-NETAU sy-vline 
WA_MDSM_STR-BDTER sy-vline 
WA_MDSM_STR-SBTER sy-vline 
WA_MDSM_STR-VERTI sy-vline 
WA_MDSM_STR-NLFZT sy-vline 
WA_MDSM_STR-BDZTP sy-vline 
WA_MDSM_STR-ROHPS sy-vline 
WA_MDSM_STR-ROANZ sy-vline 
WA_MDSM_STR-ROMEN sy-vline 
WA_MDSM_STR-ROMEI sy-vline 
WA_MDSM_STR-ROMS1 sy-vline 
WA_MDSM_STR-ROMS2 sy-vline 
WA_MDSM_STR-ROMS3 sy-vline 
WA_MDSM_STR-RFORM sy-vline 
WA_MDSM_STR-CUOBJ sy-vline 
WA_MDSM_STR-NFPKZ sy-vline 
WA_MDSM_STR-KZAUS sy-vline 
WA_MDSM_STR-NFEAG sy-vline 
WA_MDSM_STR-NFGRP sy-vline 
WA_MDSM_STR-NAFKZ sy-vline 
WA_MDSM_STR-NOMNG sy-vline 
WA_MDSM_STR-NOMAT sy-vline 
WA_MDSM_STR-NFUML sy-vline 
WA_MDSM_STR-LTXSP sy-vline 
WA_MDSM_STR-POTX1 sy-vline 
WA_MDSM_STR-POTX2 sy-vline 
WA_MDSM_STR-PLNUM sy-vline 
WA_MDSM_STR-BAUGR sy-vline 
WA_MDSM_STR-BAUST sy-vline 
WA_MDSM_STR-BAUWG sy-vline 
WA_MDSM_STR-SERNR sy-vline 
WA_MDSM_STR-AENNR sy-vline 
WA_MDSM_STR-REVLV sy-vline 
WA_MDSM_STR-STLTY sy-vline 
WA_MDSM_STR-STLNR sy-vline 
WA_MDSM_STR-STLKN sy-vline 
WA_MDSM_STR-STPOZ sy-vline 
WA_MDSM_STR-OBJNR sy-vline 
WA_MDSM_STR-FLGAT sy-vline 
WA_MDSM_STR-PLNFL sy-vline 
WA_MDSM_STR-VORNR sy-vline 
WA_MDSM_STR-APLZL sy-vline 
WA_MDSM_STR-STVKN sy-vline 
WA_MDSM_STR-VRPLA sy-vline 
WA_MDSM_STR-PBDNR sy-vline 
WA_MDSM_STR-KNTTP sy-vline 
WA_MDSM_STR-SOBKZ sy-vline 
WA_MDSM_STR-KZVBR sy-vline 
WA_MDSM_STR-KDAUF sy-vline 
WA_MDSM_STR-KDPOS sy-vline 
WA_MDSM_STR-KDEIN sy-vline 
WA_MDSM_STR-PSPEL sy-vline 
WA_MDSM_STR-CLAKZ sy-vline 
WA_MDSM_STR-SANKA sy-vline 
WA_MDSM_STR-KZKUP sy-vline 
WA_MDSM_STR-STLAL sy-vline 
WA_MDSM_STR-TECHS sy-vline 
WA_MDSM_STR-LIFNR sy-vline 
WA_MDSM_STR-EDGNO sy-vline 
WA_MDSM_STR-NLFZV sy-vline 
WA_MDSM_STR-NLFMV sy-vline 
WA_MDSM_STR-KZBWS sy-vline 
WA_MDSM_STR-BOM_VERSN sy-vline      INTO ld_text SEPARATED BY SPACE.

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