ABAP Select data from SAP table MDSP 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 MDSP 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 MDSP. 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 MDSP 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_MDSP TYPE STANDARD TABLE OF MDSP,
      WA_MDSP TYPE MDSP,
      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: <MDSP> TYPE MDSP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDSP
*  INTO TABLE @DATA(IT_MDSP2).
*--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_MDSP INDEX 1 INTO DATA(WA_MDSP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDSP>-STKZA = 1.
<MDSP>-DATUV = 1.
<MDSP>-DATUB = 1.
<MDSP>-TECHV = 1.
<MDSP>-TECHB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDSP-AENNR, sy-vline,
  WA_MDSP-STSOR, sy-vline,
  WA_MDSP-POSNR, sy-vline,
  WA_MDSP-POSTP, sy-vline,
  WA_MDSP-UPSKZ, sy-vline,
  WA_MDSP-SCHGT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDSP 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_MDSP 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_MDSP INTO WA_MDSP.


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

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

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

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field NLFMV
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDSP-NLFMV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDSP-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_MDSP_STR, 
STKZA TYPE STRING,
DATUV TYPE STRING,
DATUB TYPE STRING,
TECHV TYPE STRING,
TECHB TYPE STRING,
AENNR TYPE STRING,
STSOR TYPE STRING,
POSNR TYPE STRING,
POSTP TYPE STRING,
UPSKZ TYPE STRING,
SCHGT TYPE STRING,
KMPFE TYPE STRING,
KMPKA TYPE STRING,
KMPMT TYPE STRING,
KMPME TYPE STRING,
KMPMG TYPE STRING,
FMENG TYPE STRING,
ALPOS TYPE STRING,
EWAHR TYPE STRING,
ALPGR TYPE STRING,
ALPRF TYPE STRING,
ALPST TYPE STRING,
KMPAS TYPE STRING,
AVOAS TYPE STRING,
AVONT TYPE STRING,
BEIKZ TYPE STRING,
ERSKZ TYPE STRING,
REKRI TYPE STRING,
REKRS TYPE STRING,
KZDUM TYPE STRING,
KZMFG TYPE STRING,
KZVPL TYPE STRING,
KZLFP TYPE STRING,
NLFZT TYPE STRING,
KFPOS TYPE STRING,
KNOBJ TYPE STRING,
KLPOS TYPE STRING,
KZCLB TYPE STRING,
KLART TYPE STRING,
KFKLA TYPE STRING,
CLSZU TYPE STRING,
ROMNG TYPE STRING,
ROMEI TYPE STRING,
ROANZ TYPE STRING,
ROMS1 TYPE STRING,
ROMS2 TYPE STRING,
ROMS3 TYPE STRING,
RFORM TYPE STRING,
LGORT TYPE STRING,
PRVBE TYPE STRING,
NFPKZ TYPE STRING,
NFEAG TYPE STRING,
NFGRP TYPE STRING,
STLTX TYPE STRING,
STTX1 TYPE STRING,
STTX2 TYPE STRING,
EKGRP TYPE STRING,
LIFZT TYPE STRING,
WEBAZ TYPE STRING,
LIFNR TYPE STRING,
PREIS TYPE STRING,
PEINH TYPE STRING,
VERTI TYPE STRING,
WAERS TYPE STRING,
SAKTO TYPE STRING,
EKORG TYPE STRING,
STVKN TYPE STRING,
STKNR TYPE STRING,
TXPOS TYPE STRING,
RTPOS TYPE STRING,
INPOS TYPE STRING,
KZKUP TYPE STRING,
KZBSF TYPE STRING,
MTMTA TYPE STRING,
MATKL TYPE STRING,
MTWRK TYPE STRING,
MTLME TYPE STRING,
MTAME TYPE STRING,
MTURZ TYPE STRING,
MTURN TYPE STRING,
MTDIM TYPE STRING,
MTMIS TYPE STRING,
MTDVF TYPE STRING,
MTDST TYPE STRING,
MTBES TYPE STRING,
MTSOB TYPE STRING,
MTCHA TYPE STRING,
MTSEK TYPE STRING,
MTALT TYPE STRING,
MTAUS TYPE STRING,
MTKFM TYPE STRING,
MTREV TYPE STRING,
MTDZT TYPE STRING,
MTPZT TYPE STRING,
MTWZT TYPE STRING,
MTBZT TYPE STRING,
MTRZT TYPE STRING,
MTTZT TYPE STRING,
MTBMG TYPE STRING,
MTAKZ TYPE STRING,
MTADT TYPE STRING,
MTNMT TYPE STRING,
MTLPR TYPE STRING,
MTEPR TYPE STRING,
MTSGT TYPE STRING,
MTMNG TYPE STRING,
MTWRT TYPE STRING,
MTPIO TYPE STRING,
MTPIZ TYPE STRING,
MTRCD TYPE STRING,
MTVFP TYPE STRING,
CUOBJ TYPE STRING,
KZBED TYPE STRING,
DSPST TYPE STRING,
MTPVB TYPE STRING,
APOKZ TYPE STRING,
NLFZV TYPE STRING,
NLFMV TYPE STRING,
ITSOB TYPE STRING,
SGT_CMKZ TYPE STRING,
SGT_RCAT TYPE STRING,
SGT_SCAT TYPE STRING,
FSH_CRITICAL_COMP TYPE STRING,
FSH_CRITICAL_LEVEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDSP_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_MDSP_STR-STKZA sy-vline 
WA_MDSP_STR-DATUV sy-vline 
WA_MDSP_STR-DATUB sy-vline 
WA_MDSP_STR-TECHV sy-vline 
WA_MDSP_STR-TECHB sy-vline 
WA_MDSP_STR-AENNR sy-vline 
WA_MDSP_STR-STSOR sy-vline 
WA_MDSP_STR-POSNR sy-vline 
WA_MDSP_STR-POSTP sy-vline 
WA_MDSP_STR-UPSKZ sy-vline 
WA_MDSP_STR-SCHGT sy-vline 
WA_MDSP_STR-KMPFE sy-vline 
WA_MDSP_STR-KMPKA sy-vline 
WA_MDSP_STR-KMPMT sy-vline 
WA_MDSP_STR-KMPME sy-vline 
WA_MDSP_STR-KMPMG sy-vline 
WA_MDSP_STR-FMENG sy-vline 
WA_MDSP_STR-ALPOS sy-vline 
WA_MDSP_STR-EWAHR sy-vline 
WA_MDSP_STR-ALPGR sy-vline 
WA_MDSP_STR-ALPRF sy-vline 
WA_MDSP_STR-ALPST sy-vline 
WA_MDSP_STR-KMPAS sy-vline 
WA_MDSP_STR-AVOAS sy-vline 
WA_MDSP_STR-AVONT sy-vline 
WA_MDSP_STR-BEIKZ sy-vline 
WA_MDSP_STR-ERSKZ sy-vline 
WA_MDSP_STR-REKRI sy-vline 
WA_MDSP_STR-REKRS sy-vline 
WA_MDSP_STR-KZDUM sy-vline 
WA_MDSP_STR-KZMFG sy-vline 
WA_MDSP_STR-KZVPL sy-vline 
WA_MDSP_STR-KZLFP sy-vline 
WA_MDSP_STR-NLFZT sy-vline 
WA_MDSP_STR-KFPOS sy-vline 
WA_MDSP_STR-KNOBJ sy-vline 
WA_MDSP_STR-KLPOS sy-vline 
WA_MDSP_STR-KZCLB sy-vline 
WA_MDSP_STR-KLART sy-vline 
WA_MDSP_STR-KFKLA sy-vline 
WA_MDSP_STR-CLSZU sy-vline 
WA_MDSP_STR-ROMNG sy-vline 
WA_MDSP_STR-ROMEI sy-vline 
WA_MDSP_STR-ROANZ sy-vline 
WA_MDSP_STR-ROMS1 sy-vline 
WA_MDSP_STR-ROMS2 sy-vline 
WA_MDSP_STR-ROMS3 sy-vline 
WA_MDSP_STR-RFORM sy-vline 
WA_MDSP_STR-LGORT sy-vline 
WA_MDSP_STR-PRVBE sy-vline 
WA_MDSP_STR-NFPKZ sy-vline 
WA_MDSP_STR-NFEAG sy-vline 
WA_MDSP_STR-NFGRP sy-vline 
WA_MDSP_STR-STLTX sy-vline 
WA_MDSP_STR-STTX1 sy-vline 
WA_MDSP_STR-STTX2 sy-vline 
WA_MDSP_STR-EKGRP sy-vline 
WA_MDSP_STR-LIFZT sy-vline 
WA_MDSP_STR-WEBAZ sy-vline 
WA_MDSP_STR-LIFNR sy-vline 
WA_MDSP_STR-PREIS sy-vline 
WA_MDSP_STR-PEINH sy-vline 
WA_MDSP_STR-VERTI sy-vline 
WA_MDSP_STR-WAERS sy-vline 
WA_MDSP_STR-SAKTO sy-vline 
WA_MDSP_STR-EKORG sy-vline 
WA_MDSP_STR-STVKN sy-vline 
WA_MDSP_STR-STKNR sy-vline 
WA_MDSP_STR-TXPOS sy-vline 
WA_MDSP_STR-RTPOS sy-vline 
WA_MDSP_STR-INPOS sy-vline 
WA_MDSP_STR-KZKUP sy-vline 
WA_MDSP_STR-KZBSF sy-vline 
WA_MDSP_STR-MTMTA sy-vline 
WA_MDSP_STR-MATKL sy-vline 
WA_MDSP_STR-MTWRK sy-vline 
WA_MDSP_STR-MTLME sy-vline 
WA_MDSP_STR-MTAME sy-vline 
WA_MDSP_STR-MTURZ sy-vline 
WA_MDSP_STR-MTURN sy-vline 
WA_MDSP_STR-MTDIM sy-vline 
WA_MDSP_STR-MTMIS sy-vline 
WA_MDSP_STR-MTDVF sy-vline 
WA_MDSP_STR-MTDST sy-vline 
WA_MDSP_STR-MTBES sy-vline 
WA_MDSP_STR-MTSOB sy-vline 
WA_MDSP_STR-MTCHA sy-vline 
WA_MDSP_STR-MTSEK sy-vline 
WA_MDSP_STR-MTALT sy-vline 
WA_MDSP_STR-MTAUS sy-vline 
WA_MDSP_STR-MTKFM sy-vline 
WA_MDSP_STR-MTREV sy-vline 
WA_MDSP_STR-MTDZT sy-vline 
WA_MDSP_STR-MTPZT sy-vline 
WA_MDSP_STR-MTWZT sy-vline 
WA_MDSP_STR-MTBZT sy-vline 
WA_MDSP_STR-MTRZT sy-vline 
WA_MDSP_STR-MTTZT sy-vline 
WA_MDSP_STR-MTBMG sy-vline 
WA_MDSP_STR-MTAKZ sy-vline 
WA_MDSP_STR-MTADT sy-vline 
WA_MDSP_STR-MTNMT sy-vline 
WA_MDSP_STR-MTLPR sy-vline 
WA_MDSP_STR-MTEPR sy-vline 
WA_MDSP_STR-MTSGT sy-vline 
WA_MDSP_STR-MTMNG sy-vline 
WA_MDSP_STR-MTWRT sy-vline 
WA_MDSP_STR-MTPIO sy-vline 
WA_MDSP_STR-MTPIZ sy-vline 
WA_MDSP_STR-MTRCD sy-vline 
WA_MDSP_STR-MTVFP sy-vline 
WA_MDSP_STR-CUOBJ sy-vline 
WA_MDSP_STR-KZBED sy-vline 
WA_MDSP_STR-DSPST sy-vline 
WA_MDSP_STR-MTPVB sy-vline 
WA_MDSP_STR-APOKZ sy-vline 
WA_MDSP_STR-NLFZV sy-vline 
WA_MDSP_STR-NLFMV sy-vline 
WA_MDSP_STR-ITSOB sy-vline 
WA_MDSP_STR-SGT_CMKZ sy-vline 
WA_MDSP_STR-SGT_RCAT sy-vline 
WA_MDSP_STR-SGT_SCAT sy-vline 
WA_MDSP_STR-FSH_CRITICAL_COMP sy-vline 
WA_MDSP_STR-FSH_CRITICAL_LEVEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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