ABAP Select data from SAP table LWRKOTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LWRKOTR
*  INTO TABLE @DATA(IT_LWRKOTR2).
*--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_LWRKOTR INDEX 1 INTO DATA(WA_LWRKOTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LWRKOTR>-TARGETLANG = 1.
<LWRKOTR>-OBJTYPE = 1.
<LWRKOTR>-OBJNAME = 1.
<LWRKOTR>-DEVCLASS = 1.
<LWRKOTR>-MASTERLANG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LWRKOTR-SOURCELANG, sy-vline,
  WA_LWRKOTR-TRACUSKORR, sy-vline,
  WA_LWRKOTR-WORKLISTID, sy-vline,
  WA_LWRKOTR-STATUS, sy-vline,
  WA_LWRKOTR-OBJFUNC, sy-vline,
  WA_LWRKOTR-LINESTOTAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LWRKOTR 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_LWRKOTR 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_LWRKOTR INTO WA_LWRKOTR.


*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 ISOLA, internal->external for field TARGETLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LWRKOTR-TARGETLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LWRKOTR-TARGETLANG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field MASTERLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LWRKOTR-MASTERLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LWRKOTR-MASTERLANG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SOURCELANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LWRKOTR-SOURCELANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LWRKOTR-SOURCELANG.
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_LWRKOTR_STR, 
TARGETLANG TYPE STRING,
OBJTYPE TYPE STRING,
OBJNAME TYPE STRING,
DEVCLASS TYPE STRING,
MASTERLANG TYPE STRING,
SOURCELANG TYPE STRING,
TRACUSKORR TYPE STRING,
WORKLISTID TYPE STRING,
STATUS TYPE STRING,
OBJFUNC TYPE STRING,
LINESTOTAL TYPE STRING,
LINESNEW TYPE STRING,
LINESMODIF TYPE STRING,
LINESAVAIL TYPE STRING,
UNAME TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
DERIVSTAT TYPE STRING,
WLSTAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LWRKOTR_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_LWRKOTR_STR-TARGETLANG sy-vline 
WA_LWRKOTR_STR-OBJTYPE sy-vline 
WA_LWRKOTR_STR-OBJNAME sy-vline 
WA_LWRKOTR_STR-DEVCLASS sy-vline 
WA_LWRKOTR_STR-MASTERLANG sy-vline 
WA_LWRKOTR_STR-SOURCELANG sy-vline 
WA_LWRKOTR_STR-TRACUSKORR sy-vline 
WA_LWRKOTR_STR-WORKLISTID sy-vline 
WA_LWRKOTR_STR-STATUS sy-vline 
WA_LWRKOTR_STR-OBJFUNC sy-vline 
WA_LWRKOTR_STR-LINESTOTAL sy-vline 
WA_LWRKOTR_STR-LINESNEW sy-vline 
WA_LWRKOTR_STR-LINESMODIF sy-vline 
WA_LWRKOTR_STR-LINESAVAIL sy-vline 
WA_LWRKOTR_STR-UNAME sy-vline 
WA_LWRKOTR_STR-UDATE sy-vline 
WA_LWRKOTR_STR-UTIME sy-vline 
WA_LWRKOTR_STR-DERIVSTAT sy-vline 
WA_LWRKOTR_STR-WLSTAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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