ABAP Select data from SAP table MDRR 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 MDRR 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 MDRR. 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 MDRR 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_MDRR TYPE STANDARD TABLE OF MDRR,
      WA_MDRR TYPE MDRR,
      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: <MDRR> TYPE MDRR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDRR
*  INTO TABLE @DATA(IT_MDRR2).
*--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_MDRR INDEX 1 INTO DATA(WA_MDRR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDRR>-MANDT = 1.
<MDRR>-RSNUM = 1.
<MDRR>-RSPOS = 1.
<MDRR>-RSART = 1.
<MDRR>-BDART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDRR-RSSTA, sy-vline,
  WA_MDRR-XLOEK, sy-vline,
  WA_MDRR-XWAOK, sy-vline,
  WA_MDRR-KZEAR, sy-vline,
  WA_MDRR-XFEHL, sy-vline,
  WA_MDRR-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDRR 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_MDRR 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_MDRR INTO WA_MDRR.


*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_MDRR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDRR-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field /CWM/ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDRR-/CWM/ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDRR-/CWM/ERFME.
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_MDRR_STR, 
MANDT TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
BDART TYPE STRING,
RSSTA TYPE STRING,
XLOEK TYPE STRING,
XWAOK TYPE STRING,
KZEAR TYPE STRING,
XFEHL TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
PRVBE TYPE STRING,
CHARG TYPE STRING,
PLPLA TYPE STRING,
SOBKZ TYPE STRING,
BDTER TYPE STRING,
BDMNG TYPE STRING,
MEINS TYPE STRING,
SHKZG TYPE STRING,
ENMNG TYPE STRING,
WAERS TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
PLNUM TYPE STRING,
AUFNR TYPE STRING,
BAUGR TYPE STRING,
SERNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
BWART TYPE STRING,
SAKNR TYPE STRING,
POSTP TYPE STRING,
POSNR TYPE STRING,
ROMS1 TYPE STRING,
ROMS2 TYPE STRING,
ROMS3 TYPE STRING,
ROMEI TYPE STRING,
ROMEN TYPE STRING,
ROHPS TYPE STRING,
RFORM TYPE STRING,
ROANZ TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLKN TYPE STRING,
STPOZ TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
SBTER TYPE STRING,
KNTTP TYPE STRING,
KZVBR TYPE STRING,
PSPEL TYPE STRING,
AUFPL TYPE STRING,
PLNFL TYPE STRING,
VORNR TYPE STRING,
APLZL TYPE STRING,
OBJNR TYPE STRING,
RGEKZ TYPE STRING,
VMENG TYPE STRING,
PRREG TYPE STRING,
REVLV TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
ESMNG TYPE STRING,
LIFNR TYPE STRING,
KZBWS TYPE STRING,
/CWM/ERFMG TYPE STRING,
/CWM/ERFME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDRR_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_MDRR_STR-MANDT sy-vline 
WA_MDRR_STR-RSNUM sy-vline 
WA_MDRR_STR-RSPOS sy-vline 
WA_MDRR_STR-RSART sy-vline 
WA_MDRR_STR-BDART sy-vline 
WA_MDRR_STR-RSSTA sy-vline 
WA_MDRR_STR-XLOEK sy-vline 
WA_MDRR_STR-XWAOK sy-vline 
WA_MDRR_STR-KZEAR sy-vline 
WA_MDRR_STR-XFEHL sy-vline 
WA_MDRR_STR-MATNR sy-vline 
WA_MDRR_STR-WERKS sy-vline 
WA_MDRR_STR-LGORT sy-vline 
WA_MDRR_STR-PRVBE sy-vline 
WA_MDRR_STR-CHARG sy-vline 
WA_MDRR_STR-PLPLA sy-vline 
WA_MDRR_STR-SOBKZ sy-vline 
WA_MDRR_STR-BDTER sy-vline 
WA_MDRR_STR-BDMNG sy-vline 
WA_MDRR_STR-MEINS sy-vline 
WA_MDRR_STR-SHKZG sy-vline 
WA_MDRR_STR-ENMNG sy-vline 
WA_MDRR_STR-WAERS sy-vline 
WA_MDRR_STR-ERFMG sy-vline 
WA_MDRR_STR-ERFME sy-vline 
WA_MDRR_STR-PLNUM sy-vline 
WA_MDRR_STR-AUFNR sy-vline 
WA_MDRR_STR-BAUGR sy-vline 
WA_MDRR_STR-SERNR sy-vline 
WA_MDRR_STR-KDAUF sy-vline 
WA_MDRR_STR-KDPOS sy-vline 
WA_MDRR_STR-BWART sy-vline 
WA_MDRR_STR-SAKNR sy-vline 
WA_MDRR_STR-POSTP sy-vline 
WA_MDRR_STR-POSNR sy-vline 
WA_MDRR_STR-ROMS1 sy-vline 
WA_MDRR_STR-ROMS2 sy-vline 
WA_MDRR_STR-ROMS3 sy-vline 
WA_MDRR_STR-ROMEI sy-vline 
WA_MDRR_STR-ROMEN sy-vline 
WA_MDRR_STR-ROHPS sy-vline 
WA_MDRR_STR-RFORM sy-vline 
WA_MDRR_STR-ROANZ sy-vline 
WA_MDRR_STR-STLTY sy-vline 
WA_MDRR_STR-STLNR sy-vline 
WA_MDRR_STR-STLKN sy-vline 
WA_MDRR_STR-STPOZ sy-vline 
WA_MDRR_STR-UMREZ sy-vline 
WA_MDRR_STR-UMREN sy-vline 
WA_MDRR_STR-SBTER sy-vline 
WA_MDRR_STR-KNTTP sy-vline 
WA_MDRR_STR-KZVBR sy-vline 
WA_MDRR_STR-PSPEL sy-vline 
WA_MDRR_STR-AUFPL sy-vline 
WA_MDRR_STR-PLNFL sy-vline 
WA_MDRR_STR-VORNR sy-vline 
WA_MDRR_STR-APLZL sy-vline 
WA_MDRR_STR-OBJNR sy-vline 
WA_MDRR_STR-RGEKZ sy-vline 
WA_MDRR_STR-VMENG sy-vline 
WA_MDRR_STR-PRREG sy-vline 
WA_MDRR_STR-REVLV sy-vline 
WA_MDRR_STR-LGNUM sy-vline 
WA_MDRR_STR-LGTYP sy-vline 
WA_MDRR_STR-LGPLA sy-vline 
WA_MDRR_STR-ESMNG sy-vline 
WA_MDRR_STR-LIFNR sy-vline 
WA_MDRR_STR-KZBWS sy-vline 
WA_MDRR_STR-/CWM/ERFMG sy-vline 
WA_MDRR_STR-/CWM/ERFME sy-vline      INTO ld_text SEPARATED BY SPACE.

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