ABAP Select data from SAP table LRF_WKQU_V into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LRF_WKQU_V
*  INTO TABLE @DATA(IT_LRF_WKQU_V2).
*--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_LRF_WKQU_V INDEX 1 INTO DATA(WA_LRF_WKQU_V2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LRF_WKQU_V>-MANDT = 1.
<LRF_WKQU_V>-LGNUM = 1.
<LRF_WKQU_V>-BNAME = 1.
<LRF_WKQU_V>-QUEUE = 1.
<LRF_WKQU_V>-STATU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LRF_WKQU_V-DEVTY, sy-vline,
  WA_LRF_WKQU_V-EXVER, sy-vline,
  WA_LRF_WKQU_V-MMENU, sy-vline,
  WA_LRF_WKQU_V-DOCNUM, sy-vline,
  WA_LRF_WKQU_V-AUTHO, sy-vline,
  WA_LRF_WKQU_V-PERNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LRF_WKQU_V 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_LRF_WKQU_V 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_LRF_WKQU_V INTO WA_LRF_WKQU_V.


*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_LRF_WKQU_V_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
BNAME TYPE STRING,
QUEUE TYPE STRING,
STATU TYPE STRING,
DEVTY TYPE STRING,
EXVER TYPE STRING,
MMENU TYPE STRING,
DOCNUM TYPE STRING,
AUTHO TYPE STRING,
PERNR TYPE STRING,
SORSQ TYPE STRING,
LAMEN TYPE STRING,
APPLC TYPE STRING,
PRSDV TYPE STRING,
PERSN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LRF_WKQU_V_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_LRF_WKQU_V_STR-MANDT sy-vline 
WA_LRF_WKQU_V_STR-LGNUM sy-vline 
WA_LRF_WKQU_V_STR-BNAME sy-vline 
WA_LRF_WKQU_V_STR-QUEUE sy-vline 
WA_LRF_WKQU_V_STR-STATU sy-vline 
WA_LRF_WKQU_V_STR-DEVTY sy-vline 
WA_LRF_WKQU_V_STR-EXVER sy-vline 
WA_LRF_WKQU_V_STR-MMENU sy-vline 
WA_LRF_WKQU_V_STR-DOCNUM sy-vline 
WA_LRF_WKQU_V_STR-AUTHO sy-vline 
WA_LRF_WKQU_V_STR-PERNR sy-vline 
WA_LRF_WKQU_V_STR-SORSQ sy-vline 
WA_LRF_WKQU_V_STR-LAMEN sy-vline 
WA_LRF_WKQU_V_STR-APPLC sy-vline 
WA_LRF_WKQU_V_STR-PRSDV sy-vline 
WA_LRF_WKQU_V_STR-PERSN sy-vline      INTO ld_text SEPARATED BY SPACE.

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