ABAP Select data from SAP table PMD_S_WLK2_UI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PMD_S_WLK2_UI 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 PMD_S_WLK2_UI. 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 PMD_S_WLK2_UI 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_PMD_S_WLK2_UI TYPE STANDARD TABLE OF PMD_S_WLK2_UI,
      WA_PMD_S_WLK2_UI TYPE PMD_S_WLK2_UI,
      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: <PMD_S_WLK2_UI> TYPE PMD_S_WLK2_UI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PMD_S_WLK2_UI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PMD_S_WLK2_UI
  INTO TABLE IT_PMD_S_WLK2_UI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMD_S_WLK2_UI
*  INTO TABLE @DATA(IT_PMD_S_WLK2_UI2).
*--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_PMD_S_WLK2_UI INDEX 1 INTO DATA(WA_PMD_S_WLK2_UI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PMD_S_WLK2_UI ASSIGNING <PMD_S_WLK2_UI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMD_S_WLK2_UI>-VKORG = 1.
<PMD_S_WLK2_UI>-VTWEG = 1.
<PMD_S_WLK2_UI>-WERKS = 1.
<PMD_S_WLK2_UI>-DATAE = 1.
<PMD_S_WLK2_UI>-AENAM = 1.

ENDLOOP.

LOOP AT IT_PMD_S_WLK2_UI INTO WA_PMD_S_WLK2_UI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMD_S_WLK2_UI-KWDHT, sy-vline,
  WA_PMD_S_WLK2_UI-PRERF, sy-vline,
  WA_PMD_S_WLK2_UI-VKDAB, sy-vline,
  WA_PMD_S_WLK2_UI-VKBIS, sy-vline,
  WA_PMD_S_WLK2_UI-MSTAV, sy-vline,
  WA_PMD_S_WLK2_UI-MSTDV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMD_S_WLK2_UI 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_PMD_S_WLK2_UI 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_PMD_S_WLK2_UI INTO WA_PMD_S_WLK2_UI.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PMD_S_WLK2_UI_STR, 
VKORG TYPE STRING,
VTWEG TYPE STRING,
WERKS TYPE STRING,
DATAE TYPE STRING,
AENAM TYPE STRING,
KWDHT TYPE STRING,
PRERF TYPE STRING,
VKDAB TYPE STRING,
VKBIS TYPE STRING,
MSTAV TYPE STRING,
MSTDV TYPE STRING,
RBZUL TYPE STRING,
SCAGR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMD_S_WLK2_UI_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_PMD_S_WLK2_UI_STR-VKORG sy-vline 
WA_PMD_S_WLK2_UI_STR-VTWEG sy-vline 
WA_PMD_S_WLK2_UI_STR-WERKS sy-vline 
WA_PMD_S_WLK2_UI_STR-DATAE sy-vline 
WA_PMD_S_WLK2_UI_STR-AENAM sy-vline 
WA_PMD_S_WLK2_UI_STR-KWDHT sy-vline 
WA_PMD_S_WLK2_UI_STR-PRERF sy-vline 
WA_PMD_S_WLK2_UI_STR-VKDAB sy-vline 
WA_PMD_S_WLK2_UI_STR-VKBIS sy-vline 
WA_PMD_S_WLK2_UI_STR-MSTAV sy-vline 
WA_PMD_S_WLK2_UI_STR-MSTDV sy-vline 
WA_PMD_S_WLK2_UI_STR-RBZUL sy-vline 
WA_PMD_S_WLK2_UI_STR-SCAGR sy-vline      INTO ld_text SEPARATED BY SPACE.

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