ABAP Select data from SAP table /LSIERP/WLI_IL_ASSIGNED into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /LSIERP/WLI_IL_ASSIGNED 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 /LSIERP/WLI_IL_ASSIGNED. 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 /LSIERP/WLI_IL_ASSIGNED 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_/LSIERP/WLI_IL_ASSIGNED TYPE STANDARD TABLE OF /LSIERP/WLI_IL_ASSIGNED,
      WA_/LSIERP/WLI_IL_ASSIGNED TYPE /LSIERP/WLI_IL_ASSIGNED,
      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: </LSIERP/WLI_IL_ASSIGNED> TYPE /LSIERP/WLI_IL_ASSIGNED.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /LSIERP/WLI_IL_ASSIGNED
  INTO TABLE IT_/LSIERP/WLI_IL_ASSIGNED.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /LSIERP/WLI_IL_ASSIGNED
*  INTO TABLE @DATA(IT_/LSIERP/WLI_IL_ASSIGNED2).
*--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_/LSIERP/WLI_IL_ASSIGNED INDEX 1 INTO DATA(WA_/LSIERP/WLI_IL_ASSIGNED2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/LSIERP/WLI_IL_ASSIGNED ASSIGNING </LSIERP/WLI_IL_ASSIGNED>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</LSIERP/WLI_IL_ASSIGNED>-XMARK = 1.
</LSIERP/WLI_IL_ASSIGNED>-OPBEL = 1.
</LSIERP/WLI_IL_ASSIGNED>-OPUPW = 1.
</LSIERP/WLI_IL_ASSIGNED>-OPUPK = 1.
</LSIERP/WLI_IL_ASSIGNED>-OPUPZ = 1.

ENDLOOP.

LOOP AT IT_/LSIERP/WLI_IL_ASSIGNED INTO WA_/LSIERP/WLI_IL_ASSIGNED.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/LSIERP/WLI_IL_ASSIGNED-BETRW, sy-vline,
  WA_/LSIERP/WLI_IL_ASSIGNED-WAERS, sy-vline,
  WA_/LSIERP/WLI_IL_ASSIGNED-FAEDN, sy-vline,
  WA_/LSIERP/WLI_IL_ASSIGNED-XINACTIVE, sy-vline,
  WA_/LSIERP/WLI_IL_ASSIGNED-VKONT, sy-vline,
  WA_/LSIERP/WLI_IL_ASSIGNED-VTREF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/LSIERP/WLI_IL_ASSIGNED 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_/LSIERP/WLI_IL_ASSIGNED 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_/LSIERP/WLI_IL_ASSIGNED INTO WA_/LSIERP/WLI_IL_ASSIGNED.


*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 OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/LSIERP/WLI_IL_ASSIGNED-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/LSIERP/WLI_IL_ASSIGNED-OPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/LSIERP/WLI_IL_ASSIGNED-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/LSIERP/WLI_IL_ASSIGNED-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/LSIERP/WLI_IL_ASSIGNED-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/LSIERP/WLI_IL_ASSIGNED-VTREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEASING_CONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/LSIERP/WLI_IL_ASSIGNED-LEASING_CONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/LSIERP/WLI_IL_ASSIGNED-LEASING_CONTRACT.
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_/LSIERP/WLI_IL_ASSIGNED_STR, 
XMARK TYPE STRING,
OPBEL TYPE STRING,
OPUPW TYPE STRING,
OPUPK TYPE STRING,
OPUPZ TYPE STRING,
BETRW TYPE STRING,
WAERS TYPE STRING,
FAEDN TYPE STRING,
XINACTIVE TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
LEASING_CONTRACT TYPE STRING,
ITEMNO TYPE STRING,
DELINQUENCY_DESC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/LSIERP/WLI_IL_ASSIGNED_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_/LSIERP/WLI_IL_ASSIGNED_STR-XMARK sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-OPBEL sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-OPUPW sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-OPUPK sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-OPUPZ sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-BETRW sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-WAERS sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-FAEDN sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-XINACTIVE sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-VKONT sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-VTREF sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-LEASING_CONTRACT sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-ITEMNO sy-vline 
WA_/LSIERP/WLI_IL_ASSIGNED_STR-DELINQUENCY_DESC sy-vline      INTO ld_text SEPARATED BY SPACE.

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