ABAP Select data from SAP table LSO_LUINFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LSO_LUINFO
*  INTO TABLE @DATA(IT_LSO_LUINFO2).
*--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_LSO_LUINFO INDEX 1 INTO DATA(WA_LSO_LUINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LSO_LUINFO>-LU = 1.
<LSO_LUINFO>-AVAILABLE = 1.
<LSO_LUINFO>-LUTYPE = 1.
<LSO_LUINFO>-TITLE = 1.
<LSO_LUINFO>-OBJECTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LSO_LUINFO-STATUS, sy-vline,
  WA_LSO_LUINFO-LUFORMAT, sy-vline,
  WA_LSO_LUINFO-LUDATE, sy-vline,
  WA_LSO_LUINFO-LUPREC, sy-vline,
  WA_LSO_LUINFO-CONTEXT, sy-vline,
  WA_LSO_LUINFO-CONTEXTPREC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LSO_LUINFO 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_LSO_LUINFO 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_LSO_LUINFO INTO WA_LSO_LUINFO.


*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_LSO_LUINFO_STR, 
LU TYPE STRING,
AVAILABLE TYPE STRING,
LUTYPE TYPE STRING,
TITLE TYPE STRING,
OBJECTTYPE TYPE STRING,
STATUS TYPE STRING,
LUFORMAT TYPE STRING,
LUDATE TYPE STRING,
LUPREC TYPE STRING,
CONTEXT TYPE STRING,
CONTEXTPREC TYPE STRING,
LU_OBSOLETE TYPE STRING,
LUTYPE_OBSOLETE TYPE STRING,
LENGTH TYPE STRING,
PATH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LSO_LUINFO_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_LSO_LUINFO_STR-LU sy-vline 
WA_LSO_LUINFO_STR-AVAILABLE sy-vline 
WA_LSO_LUINFO_STR-LUTYPE sy-vline 
WA_LSO_LUINFO_STR-TITLE sy-vline 
WA_LSO_LUINFO_STR-OBJECTTYPE sy-vline 
WA_LSO_LUINFO_STR-STATUS sy-vline 
WA_LSO_LUINFO_STR-LUFORMAT sy-vline 
WA_LSO_LUINFO_STR-LUDATE sy-vline 
WA_LSO_LUINFO_STR-LUPREC sy-vline 
WA_LSO_LUINFO_STR-CONTEXT sy-vline 
WA_LSO_LUINFO_STR-CONTEXTPREC sy-vline 
WA_LSO_LUINFO_STR-LU_OBSOLETE sy-vline 
WA_LSO_LUINFO_STR-LUTYPE_OBSOLETE sy-vline 
WA_LSO_LUINFO_STR-LENGTH sy-vline 
WA_LSO_LUINFO_STR-PATH sy-vline      INTO ld_text SEPARATED BY SPACE.

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