ABAP Select data from SAP table V_PEG_MDRS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_PEG_MDRS
*  INTO TABLE @DATA(IT_V_PEG_MDRS2).
*--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_V_PEG_MDRS INDEX 1 INTO DATA(WA_V_PEG_MDRS2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_PEG_MDRS-UPSKZ, sy-vline,
  WA_V_PEG_MDRS-SCHGT, sy-vline,
  WA_V_PEG_MDRS-TXTPS, sy-vline,
  WA_V_PEG_MDRS-DUMPS, sy-vline,
  WA_V_PEG_MDRS-KFPOS, sy-vline,
  WA_V_PEG_MDRS-DBSKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_PEG_MDRS 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_V_PEG_MDRS 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_V_PEG_MDRS INTO WA_V_PEG_MDRS.


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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit NUMCV, internal->external for field REVLV
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_V_PEG_MDRS-REVLV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_PEG_MDRS-REVLV.
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_V_PEG_MDRS_STR, 
MANDT TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
BDART TYPE STRING,
UPSKZ TYPE STRING,
SCHGT TYPE STRING,
TXTPS TYPE STRING,
DUMPS TYPE STRING,
KFPOS TYPE STRING,
DBSKZ TYPE STRING,
XLOEK TYPE STRING,
XWAOK TYPE STRING,
KZEAR TYPE STRING,
RSSTA TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
KNTTP TYPE STRING,
SOBKZ TYPE STRING,
KZVBR TYPE STRING,
BDTER TYPE STRING,
NLFZT TYPE STRING,
BDMNG TYPE STRING,
ALPOS TYPE STRING,
EWAHR TYPE STRING,
MEINS TYPE STRING,
SHKZG TYPE STRING,
ENMNG TYPE STRING,
BAUGR TYPE STRING,
SERNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
PSPEL TYPE STRING,
CUOBJ TYPE STRING,
PLNUM TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
EBELE TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
UMWRK TYPE STRING,
UMLGO TYPE STRING,
KZAUS TYPE STRING,
NFEAG TYPE STRING,
NFGRP TYPE STRING,
NFPKZ TYPE STRING,
NAFKZ TYPE STRING,
NOMNG TYPE STRING,
NFUML TYPE STRING,
NOMAT TYPE STRING,
POSTP TYPE STRING,
POSNR TYPE STRING,
SBTER TYPE STRING,
VERTI TYPE STRING,
VMENG TYPE STRING,
NDISP TYPE STRING,
STLNR TYPE STRING,
XFEHL TYPE STRING,
PBDNR TYPE STRING,
VRPLA TYPE STRING,
LIFNR TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
ERFME TYPE STRING,
ERFMG TYPE STRING,
KZBWS TYPE STRING,
TECHS TYPE STRING,
REVLV TYPE STRING,
BWART TYPE STRING,
UMSOK TYPE STRING,
STLTY TYPE STRING,
STLKN TYPE STRING,
STPOZ TYPE STRING,
VORAB TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_PEG_MDRS_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_V_PEG_MDRS_STR-MANDT sy-vline 
WA_V_PEG_MDRS_STR-RSNUM sy-vline 
WA_V_PEG_MDRS_STR-RSPOS sy-vline 
WA_V_PEG_MDRS_STR-RSART sy-vline 
WA_V_PEG_MDRS_STR-BDART sy-vline 
WA_V_PEG_MDRS_STR-UPSKZ sy-vline 
WA_V_PEG_MDRS_STR-SCHGT sy-vline 
WA_V_PEG_MDRS_STR-TXTPS sy-vline 
WA_V_PEG_MDRS_STR-DUMPS sy-vline 
WA_V_PEG_MDRS_STR-KFPOS sy-vline 
WA_V_PEG_MDRS_STR-DBSKZ sy-vline 
WA_V_PEG_MDRS_STR-XLOEK sy-vline 
WA_V_PEG_MDRS_STR-XWAOK sy-vline 
WA_V_PEG_MDRS_STR-KZEAR sy-vline 
WA_V_PEG_MDRS_STR-RSSTA sy-vline 
WA_V_PEG_MDRS_STR-MATNR sy-vline 
WA_V_PEG_MDRS_STR-WERKS sy-vline 
WA_V_PEG_MDRS_STR-LGORT sy-vline 
WA_V_PEG_MDRS_STR-CHARG sy-vline 
WA_V_PEG_MDRS_STR-KNTTP sy-vline 
WA_V_PEG_MDRS_STR-SOBKZ sy-vline 
WA_V_PEG_MDRS_STR-KZVBR sy-vline 
WA_V_PEG_MDRS_STR-BDTER sy-vline 
WA_V_PEG_MDRS_STR-NLFZT sy-vline 
WA_V_PEG_MDRS_STR-BDMNG sy-vline 
WA_V_PEG_MDRS_STR-ALPOS sy-vline 
WA_V_PEG_MDRS_STR-EWAHR sy-vline 
WA_V_PEG_MDRS_STR-MEINS sy-vline 
WA_V_PEG_MDRS_STR-SHKZG sy-vline 
WA_V_PEG_MDRS_STR-ENMNG sy-vline 
WA_V_PEG_MDRS_STR-BAUGR sy-vline 
WA_V_PEG_MDRS_STR-SERNR sy-vline 
WA_V_PEG_MDRS_STR-KDAUF sy-vline 
WA_V_PEG_MDRS_STR-KDPOS sy-vline 
WA_V_PEG_MDRS_STR-KDEIN sy-vline 
WA_V_PEG_MDRS_STR-PSPEL sy-vline 
WA_V_PEG_MDRS_STR-CUOBJ sy-vline 
WA_V_PEG_MDRS_STR-PLNUM sy-vline 
WA_V_PEG_MDRS_STR-BANFN sy-vline 
WA_V_PEG_MDRS_STR-BNFPO sy-vline 
WA_V_PEG_MDRS_STR-EBELN sy-vline 
WA_V_PEG_MDRS_STR-EBELP sy-vline 
WA_V_PEG_MDRS_STR-EBELE sy-vline 
WA_V_PEG_MDRS_STR-AUFNR sy-vline 
WA_V_PEG_MDRS_STR-AUFPS sy-vline 
WA_V_PEG_MDRS_STR-UMWRK sy-vline 
WA_V_PEG_MDRS_STR-UMLGO sy-vline 
WA_V_PEG_MDRS_STR-KZAUS sy-vline 
WA_V_PEG_MDRS_STR-NFEAG sy-vline 
WA_V_PEG_MDRS_STR-NFGRP sy-vline 
WA_V_PEG_MDRS_STR-NFPKZ sy-vline 
WA_V_PEG_MDRS_STR-NAFKZ sy-vline 
WA_V_PEG_MDRS_STR-NOMNG sy-vline 
WA_V_PEG_MDRS_STR-NFUML sy-vline 
WA_V_PEG_MDRS_STR-NOMAT sy-vline 
WA_V_PEG_MDRS_STR-POSTP sy-vline 
WA_V_PEG_MDRS_STR-POSNR sy-vline 
WA_V_PEG_MDRS_STR-SBTER sy-vline 
WA_V_PEG_MDRS_STR-VERTI sy-vline 
WA_V_PEG_MDRS_STR-VMENG sy-vline 
WA_V_PEG_MDRS_STR-NDISP sy-vline 
WA_V_PEG_MDRS_STR-STLNR sy-vline 
WA_V_PEG_MDRS_STR-XFEHL sy-vline 
WA_V_PEG_MDRS_STR-PBDNR sy-vline 
WA_V_PEG_MDRS_STR-VRPLA sy-vline 
WA_V_PEG_MDRS_STR-LIFNR sy-vline 
WA_V_PEG_MDRS_STR-UMREZ sy-vline 
WA_V_PEG_MDRS_STR-UMREN sy-vline 
WA_V_PEG_MDRS_STR-ERFME sy-vline 
WA_V_PEG_MDRS_STR-ERFMG sy-vline 
WA_V_PEG_MDRS_STR-KZBWS sy-vline 
WA_V_PEG_MDRS_STR-TECHS sy-vline 
WA_V_PEG_MDRS_STR-REVLV sy-vline 
WA_V_PEG_MDRS_STR-BWART sy-vline 
WA_V_PEG_MDRS_STR-UMSOK sy-vline 
WA_V_PEG_MDRS_STR-STLTY sy-vline 
WA_V_PEG_MDRS_STR-STLKN sy-vline 
WA_V_PEG_MDRS_STR-STPOZ sy-vline 
WA_V_PEG_MDRS_STR-VORAB sy-vline 
WA_V_PEG_MDRS_STR-AUFPL sy-vline 
WA_V_PEG_MDRS_STR-APLZL sy-vline      INTO ld_text SEPARATED BY SPACE.

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