ABAP Select data from SAP table LEDLVSTATDISPHEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LEDLVSTATDISPHEAD
*  INTO TABLE @DATA(IT_LEDLVSTATDISPHEAD2).
*--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_LEDLVSTATDISPHEAD INDEX 1 INTO DATA(WA_LEDLVSTATDISPHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LEDLVSTATDISPHEAD>-VBELN = 1.
<LEDLVSTATDISPHEAD>-KOSTK = 1.
<LEDLVSTATDISPHEAD>-PKSTK = 1.
<LEDLVSTATDISPHEAD>-LVSTK = 1.
<LEDLVSTATDISPHEAD>-KOQUK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LEDLVSTATDISPHEAD-WBSTK, sy-vline,
  WA_LEDLVSTATDISPHEAD-TRSTA, sy-vline,
  WA_LEDLVSTATDISPHEAD-FKSTK, sy-vline,
  WA_LEDLVSTATDISPHEAD-FKIVK, sy-vline,
  WA_LEDLVSTATDISPHEAD-CMGST, sy-vline,
  WA_LEDLVSTATDISPHEAD-PDSTK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LEDLVSTATDISPHEAD 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_LEDLVSTATDISPHEAD 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_LEDLVSTATDISPHEAD INTO WA_LEDLVSTATDISPHEAD.


*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 ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LEDLVSTATDISPHEAD-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LEDLVSTATDISPHEAD-VBELN.
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_LEDLVSTATDISPHEAD_STR, 
VBELN TYPE STRING,
KOSTK TYPE STRING,
PKSTK TYPE STRING,
LVSTK TYPE STRING,
KOQUK TYPE STRING,
WBSTK TYPE STRING,
TRSTA TYPE STRING,
FKSTK TYPE STRING,
FKIVK TYPE STRING,
CMGST TYPE STRING,
PDSTK TYPE STRING,
DUMMY TYPE STRING,
SPE_HDALL TYPE STRING,
SPE_HDALS TYPE STRING,
SPE_TMPID TYPE STRING,
IMWRK TYPE STRING,
/SAPMP/LBASK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LEDLVSTATDISPHEAD_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_LEDLVSTATDISPHEAD_STR-VBELN sy-vline 
WA_LEDLVSTATDISPHEAD_STR-KOSTK sy-vline 
WA_LEDLVSTATDISPHEAD_STR-PKSTK sy-vline 
WA_LEDLVSTATDISPHEAD_STR-LVSTK sy-vline 
WA_LEDLVSTATDISPHEAD_STR-KOQUK sy-vline 
WA_LEDLVSTATDISPHEAD_STR-WBSTK sy-vline 
WA_LEDLVSTATDISPHEAD_STR-TRSTA sy-vline 
WA_LEDLVSTATDISPHEAD_STR-FKSTK sy-vline 
WA_LEDLVSTATDISPHEAD_STR-FKIVK sy-vline 
WA_LEDLVSTATDISPHEAD_STR-CMGST sy-vline 
WA_LEDLVSTATDISPHEAD_STR-PDSTK sy-vline 
WA_LEDLVSTATDISPHEAD_STR-DUMMY sy-vline 
WA_LEDLVSTATDISPHEAD_STR-SPE_HDALL sy-vline 
WA_LEDLVSTATDISPHEAD_STR-SPE_HDALS sy-vline 
WA_LEDLVSTATDISPHEAD_STR-SPE_TMPID sy-vline 
WA_LEDLVSTATDISPHEAD_STR-IMWRK sy-vline 
WA_LEDLVSTATDISPHEAD_STR-/SAPMP/LBASK sy-vline      INTO ld_text SEPARATED BY SPACE.

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