ABAP Select data from SAP table LEISTUNGSDATEN_WM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LEISTUNGSDATEN_WM
*  INTO TABLE @DATA(IT_LEISTUNGSDATEN_WM2).
*--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_LEISTUNGSDATEN_WM INDEX 1 INTO DATA(WA_LEISTUNGSDATEN_WM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LEISTUNGSDATEN_WM>-LGNUM = 1.
<LEISTUNGSDATEN_WM>-TANUM = 1.
<LEISTUNGSDATEN_WM>-KZLEI = 1.
<LEISTUNGSDATEN_WM>-KISTZ = 1.
<LEISTUNGSDATEN_WM>-KISTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LEISTUNGSDATEN_WM-PERNR, sy-vline,
  WA_LEISTUNGSDATEN_WM-SOLWM, sy-vline,
  WA_LEISTUNGSDATEN_WM-SOLEX, sy-vline,
  WA_LEISTUNGSDATEN_WM-ISTWM, sy-vline,
  WA_LEISTUNGSDATEN_WM-ZEIEI, sy-vline,
  WA_LEISTUNGSDATEN_WM-HRSTS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LEISTUNGSDATEN_WM 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_LEISTUNGSDATEN_WM 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_LEISTUNGSDATEN_WM INTO WA_LEISTUNGSDATEN_WM.


*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 CUNIT, internal->external for field ZEIEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LEISTUNGSDATEN_WM-ZEIEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LEISTUNGSDATEN_WM-ZEIEI.
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_LEISTUNGSDATEN_WM_STR, 
LGNUM TYPE STRING,
TANUM TYPE STRING,
KZLEI TYPE STRING,
KISTZ TYPE STRING,
KISTP TYPE STRING,
PERNR TYPE STRING,
SOLWM TYPE STRING,
SOLEX TYPE STRING,
ISTWM TYPE STRING,
ZEIEI TYPE STRING,
HRSTS TYPE STRING,
STDAT TYPE STRING,
ENDAT TYPE STRING,
STUZT TYPE STRING,
ENUZT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LEISTUNGSDATEN_WM_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_LEISTUNGSDATEN_WM_STR-LGNUM sy-vline 
WA_LEISTUNGSDATEN_WM_STR-TANUM sy-vline 
WA_LEISTUNGSDATEN_WM_STR-KZLEI sy-vline 
WA_LEISTUNGSDATEN_WM_STR-KISTZ sy-vline 
WA_LEISTUNGSDATEN_WM_STR-KISTP sy-vline 
WA_LEISTUNGSDATEN_WM_STR-PERNR sy-vline 
WA_LEISTUNGSDATEN_WM_STR-SOLWM sy-vline 
WA_LEISTUNGSDATEN_WM_STR-SOLEX sy-vline 
WA_LEISTUNGSDATEN_WM_STR-ISTWM sy-vline 
WA_LEISTUNGSDATEN_WM_STR-ZEIEI sy-vline 
WA_LEISTUNGSDATEN_WM_STR-HRSTS sy-vline 
WA_LEISTUNGSDATEN_WM_STR-STDAT sy-vline 
WA_LEISTUNGSDATEN_WM_STR-ENDAT sy-vline 
WA_LEISTUNGSDATEN_WM_STR-STUZT sy-vline 
WA_LEISTUNGSDATEN_WM_STR-ENUZT sy-vline      INTO ld_text SEPARATED BY SPACE.

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