ABAP Select data from SAP table HRDESV_EE_S_MLDKZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRDESV_EE_S_MLDKZ
*  INTO TABLE @DATA(IT_HRDESV_EE_S_MLDKZ2).
*--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_HRDESV_EE_S_MLDKZ INDEX 1 INTO DATA(WA_HRDESV_EE_S_MLDKZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRDESV_EE_S_MLDKZ>-WERKS = 1.
<HRDESV_EE_S_MLDKZ>-BTRTL = 1.
<HRDESV_EE_S_MLDKZ>-KKART = 1.
<HRDESV_EE_S_MLDKZ>-BTRNR = 1.
<HRDESV_EE_S_MLDKZ>-PABRP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRDESV_EE_S_MLDKZ-PABRJ, sy-vline,
  WA_HRDESV_EE_S_MLDKZ-ADATUM, sy-vline,
  WA_HRDESV_EE_S_MLDKZ-MWERKS, sy-vline,
  WA_HRDESV_EE_S_MLDKZ-MBTRTL, sy-vline,
  WA_HRDESV_EE_S_MLDKZ-MKVSCH, sy-vline,
  WA_HRDESV_EE_S_MLDKZ-MKVGES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRDESV_EE_S_MLDKZ 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_HRDESV_EE_S_MLDKZ 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_HRDESV_EE_S_MLDKZ INTO WA_HRDESV_EE_S_MLDKZ.


*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 GJAHR, internal->external for field PABRJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_HRDESV_EE_S_MLDKZ-PABRJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRDESV_EE_S_MLDKZ-PABRJ.
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_HRDESV_EE_S_MLDKZ_STR, 
WERKS TYPE STRING,
BTRTL TYPE STRING,
KKART TYPE STRING,
BTRNR TYPE STRING,
PABRP TYPE STRING,
PABRJ TYPE STRING,
ADATUM TYPE STRING,
MWERKS TYPE STRING,
MBTRTL TYPE STRING,
MKVSCH TYPE STRING,
MKVGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRDESV_EE_S_MLDKZ_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_HRDESV_EE_S_MLDKZ_STR-WERKS sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-BTRTL sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-KKART sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-BTRNR sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-PABRP sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-PABRJ sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-ADATUM sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-MWERKS sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-MBTRTL sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-MKVSCH sy-vline 
WA_HRDESV_EE_S_MLDKZ_STR-MKVGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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