ABAP Select data from SAP table MDKPDB 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 MDKPDB 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 MDKPDB. 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 MDKPDB 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_MDKPDB TYPE STANDARD TABLE OF MDKPDB,
      WA_MDKPDB TYPE MDKPDB,
      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: <MDKPDB> TYPE MDKPDB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDKPDB
*  INTO TABLE @DATA(IT_MDKPDB2).
*--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_MDKPDB INDEX 1 INTO DATA(WA_MDKPDB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDKPDB>-MANDT = 1.
<MDKPDB>-DTART = 1.
<MDKPDB>-MATNR = 1.
<MDKPDB>-BERID = 1.
<MDKPDB>-PLSCN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDKPDB-PLWRK, sy-vline,
  WA_MDKPDB-DTNUM, sy-vline,
  WA_MDKPDB-DSDAT, sy-vline,
  WA_MDKPDB-BDBKZ, sy-vline,
  WA_MDKPDB-SLKZ1, sy-vline,
  WA_MDKPDB-SLKZ2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDKPDB 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_MDKPDB 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_MDKPDB INTO WA_MDKPDB.


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

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

*Conversion exit MATN1, internal->external for field NFMAT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MDKPDB-NFMAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDKPDB-NFMAT.
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_MDKPDB_STR, 
MANDT TYPE STRING,
DTART TYPE STRING,
MATNR TYPE STRING,
BERID TYPE STRING,
PLSCN TYPE STRING,
PLWRK TYPE STRING,
DTNUM TYPE STRING,
DSDAT TYPE STRING,
BDBKZ TYPE STRING,
SLKZ1 TYPE STRING,
SLKZ2 TYPE STRING,
SLKZ3 TYPE STRING,
SLKZ4 TYPE STRING,
SLKZ5 TYPE STRING,
SLKZ6 TYPE STRING,
SLKZ7 TYPE STRING,
SLKZ8 TYPE STRING,
VRKZ1 TYPE STRING,
VRKZ2 TYPE STRING,
VRKZ3 TYPE STRING,
MTART TYPE STRING,
MEINS TYPE STRING,
DISST TYPE STRING,
BESKZ TYPE STRING,
SOBSL TYPE STRING,
SOBES TYPE STRING,
WRK02 TYPE STRING,
DISMM TYPE STRING,
DISVF TYPE STRING,
DISPO TYPE STRING,
PLDIS TYPE STRING,
EKGRP TYPE STRING,
MTWZT TYPE STRING,
WEBAZ TYPE STRING,
BEAZT TYPE STRING,
FIXTR TYPE STRING,
MFHKZ TYPE STRING,
DISLS TYPE STRING,
LOSVF TYPE STRING,
LOSKZ TYPE STRING,
PERAZ TYPE STRING,
EISBE TYPE STRING,
MINBE TYPE STRING,
HOEBE TYPE STRING,
BSTMI TYPE STRING,
BSTMA TYPE STRING,
BSTFX TYPE STRING,
BSTRF TYPE STRING,
SUM01 TYPE STRING,
SUM02 TYPE STRING,
SUM03 TYPE STRING,
SUM04 TYPE STRING,
SUM05 TYPE STRING,
NEGBS TYPE STRING,
MSGID TYPE STRING,
MSGAR TYPE STRING,
MSGNR TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
DISGR TYPE STRING,
PERIV TYPE STRING,
MRPPP TYPE STRING,
BDARF TYPE STRING,
LFRHY TYPE STRING,
RDPRF TYPE STRING,
BERW1 TYPE STRING,
BERW2 TYPE STRING,
KZAUS TYPE STRING,
AUSDT TYPE STRING,
NFMAT TYPE STRING,
AUSZ1 TYPE STRING,
AUSZ2 TYPE STRING,
AUSZ3 TYPE STRING,
AUSZ4 TYPE STRING,
AUSZ5 TYPE STRING,
AUSZ6 TYPE STRING,
AUSZ7 TYPE STRING,
AUSZ8 TYPE STRING,
BEADA TYPE STRING,
NAUKZ TYPE STRING,
SAUFT TYPE STRING,
KZPROMO TYPE STRING,
SHFLG TYPE STRING,
SHZET TYPE STRING,
FABKZ TYPE STRING,
MFXDT TYPE STRING,
BSKFL TYPE STRING,
MAABC TYPE STRING,
CFLAG TYPE STRING,
GRREL TYPE STRING,
RWPRO TYPE STRING,
SHPRO TYPE STRING,
AHDIS TYPE STRING,
BERW4 TYPE STRING,
BADON TYPE STRING,
SGT_STATC TYPE STRING,
HANAON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDKPDB_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_MDKPDB_STR-MANDT sy-vline 
WA_MDKPDB_STR-DTART sy-vline 
WA_MDKPDB_STR-MATNR sy-vline 
WA_MDKPDB_STR-BERID sy-vline 
WA_MDKPDB_STR-PLSCN sy-vline 
WA_MDKPDB_STR-PLWRK sy-vline 
WA_MDKPDB_STR-DTNUM sy-vline 
WA_MDKPDB_STR-DSDAT sy-vline 
WA_MDKPDB_STR-BDBKZ sy-vline 
WA_MDKPDB_STR-SLKZ1 sy-vline 
WA_MDKPDB_STR-SLKZ2 sy-vline 
WA_MDKPDB_STR-SLKZ3 sy-vline 
WA_MDKPDB_STR-SLKZ4 sy-vline 
WA_MDKPDB_STR-SLKZ5 sy-vline 
WA_MDKPDB_STR-SLKZ6 sy-vline 
WA_MDKPDB_STR-SLKZ7 sy-vline 
WA_MDKPDB_STR-SLKZ8 sy-vline 
WA_MDKPDB_STR-VRKZ1 sy-vline 
WA_MDKPDB_STR-VRKZ2 sy-vline 
WA_MDKPDB_STR-VRKZ3 sy-vline 
WA_MDKPDB_STR-MTART sy-vline 
WA_MDKPDB_STR-MEINS sy-vline 
WA_MDKPDB_STR-DISST sy-vline 
WA_MDKPDB_STR-BESKZ sy-vline 
WA_MDKPDB_STR-SOBSL sy-vline 
WA_MDKPDB_STR-SOBES sy-vline 
WA_MDKPDB_STR-WRK02 sy-vline 
WA_MDKPDB_STR-DISMM sy-vline 
WA_MDKPDB_STR-DISVF sy-vline 
WA_MDKPDB_STR-DISPO sy-vline 
WA_MDKPDB_STR-PLDIS sy-vline 
WA_MDKPDB_STR-EKGRP sy-vline 
WA_MDKPDB_STR-MTWZT sy-vline 
WA_MDKPDB_STR-WEBAZ sy-vline 
WA_MDKPDB_STR-BEAZT sy-vline 
WA_MDKPDB_STR-FIXTR sy-vline 
WA_MDKPDB_STR-MFHKZ sy-vline 
WA_MDKPDB_STR-DISLS sy-vline 
WA_MDKPDB_STR-LOSVF sy-vline 
WA_MDKPDB_STR-LOSKZ sy-vline 
WA_MDKPDB_STR-PERAZ sy-vline 
WA_MDKPDB_STR-EISBE sy-vline 
WA_MDKPDB_STR-MINBE sy-vline 
WA_MDKPDB_STR-HOEBE sy-vline 
WA_MDKPDB_STR-BSTMI sy-vline 
WA_MDKPDB_STR-BSTMA sy-vline 
WA_MDKPDB_STR-BSTFX sy-vline 
WA_MDKPDB_STR-BSTRF sy-vline 
WA_MDKPDB_STR-SUM01 sy-vline 
WA_MDKPDB_STR-SUM02 sy-vline 
WA_MDKPDB_STR-SUM03 sy-vline 
WA_MDKPDB_STR-SUM04 sy-vline 
WA_MDKPDB_STR-SUM05 sy-vline 
WA_MDKPDB_STR-NEGBS sy-vline 
WA_MDKPDB_STR-MSGID sy-vline 
WA_MDKPDB_STR-MSGAR sy-vline 
WA_MDKPDB_STR-MSGNR sy-vline 
WA_MDKPDB_STR-MSGV1 sy-vline 
WA_MDKPDB_STR-MSGV2 sy-vline 
WA_MDKPDB_STR-MSGV3 sy-vline 
WA_MDKPDB_STR-MSGV4 sy-vline 
WA_MDKPDB_STR-DISGR sy-vline 
WA_MDKPDB_STR-PERIV sy-vline 
WA_MDKPDB_STR-MRPPP sy-vline 
WA_MDKPDB_STR-BDARF sy-vline 
WA_MDKPDB_STR-LFRHY sy-vline 
WA_MDKPDB_STR-RDPRF sy-vline 
WA_MDKPDB_STR-BERW1 sy-vline 
WA_MDKPDB_STR-BERW2 sy-vline 
WA_MDKPDB_STR-KZAUS sy-vline 
WA_MDKPDB_STR-AUSDT sy-vline 
WA_MDKPDB_STR-NFMAT sy-vline 
WA_MDKPDB_STR-AUSZ1 sy-vline 
WA_MDKPDB_STR-AUSZ2 sy-vline 
WA_MDKPDB_STR-AUSZ3 sy-vline 
WA_MDKPDB_STR-AUSZ4 sy-vline 
WA_MDKPDB_STR-AUSZ5 sy-vline 
WA_MDKPDB_STR-AUSZ6 sy-vline 
WA_MDKPDB_STR-AUSZ7 sy-vline 
WA_MDKPDB_STR-AUSZ8 sy-vline 
WA_MDKPDB_STR-BEADA sy-vline 
WA_MDKPDB_STR-NAUKZ sy-vline 
WA_MDKPDB_STR-SAUFT sy-vline 
WA_MDKPDB_STR-KZPROMO sy-vline 
WA_MDKPDB_STR-SHFLG sy-vline 
WA_MDKPDB_STR-SHZET sy-vline 
WA_MDKPDB_STR-FABKZ sy-vline 
WA_MDKPDB_STR-MFXDT sy-vline 
WA_MDKPDB_STR-BSKFL sy-vline 
WA_MDKPDB_STR-MAABC sy-vline 
WA_MDKPDB_STR-CFLAG sy-vline 
WA_MDKPDB_STR-GRREL sy-vline 
WA_MDKPDB_STR-RWPRO sy-vline 
WA_MDKPDB_STR-SHPRO sy-vline 
WA_MDKPDB_STR-AHDIS sy-vline 
WA_MDKPDB_STR-BERW4 sy-vline 
WA_MDKPDB_STR-BADON sy-vline 
WA_MDKPDB_STR-SGT_STATC sy-vline 
WA_MDKPDB_STR-HANAON sy-vline      INTO ld_text SEPARATED BY SPACE.

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