ABAP Select data from SAP table LSRSCREEN into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LSRSCREEN
*  INTO TABLE @DATA(IT_LSRSCREEN2).
*--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_LSRSCREEN INDEX 1 INTO DATA(WA_LSRSCREEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LSRSCREEN>-PROJECT = 1.
<LSRSCREEN>-RULENAME = 1.
<LSRSCREEN>-RULETYPE = 1.
<LSRSCREEN>-TEXTFELD = 1.
<LSRSCREEN>-TRGLEN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LSRSCREEN-TRGTYPE, sy-vline,
  WA_LSRSCREEN-TRGNAME, sy-vline,
  WA_LSRSCREEN-TRGLC, sy-vline,
  WA_LSRSCREEN-SRCLEN, sy-vline,
  WA_LSRSCREEN-SRCTYPE, sy-vline,
  WA_LSRSCREEN-SRCNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LSRSCREEN 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_LSRSCREEN 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_LSRSCREEN INTO WA_LSRSCREEN.


*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_LSRSCREEN_STR, 
PROJECT TYPE STRING,
RULENAME TYPE STRING,
RULETYPE TYPE STRING,
TEXTFELD TYPE STRING,
TRGLEN TYPE STRING,
TRGTYPE TYPE STRING,
TRGNAME TYPE STRING,
TRGLC TYPE STRING,
SRCLEN TYPE STRING,
SRCTYPE TYPE STRING,
SRCNAME TYPE STRING,
SRCLC TYPE STRING,
SRCLEN_2 TYPE STRING,
SRCTYPE_2 TYPE STRING,
SRCNAME_2 TYPE STRING,
SRCLC_2 TYPE STRING,
SRCLEN_3 TYPE STRING,
SRCTYPE_3 TYPE STRING,
SRCNAME_3 TYPE STRING,
SRCLC_3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LSRSCREEN_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_LSRSCREEN_STR-PROJECT sy-vline 
WA_LSRSCREEN_STR-RULENAME sy-vline 
WA_LSRSCREEN_STR-RULETYPE sy-vline 
WA_LSRSCREEN_STR-TEXTFELD sy-vline 
WA_LSRSCREEN_STR-TRGLEN sy-vline 
WA_LSRSCREEN_STR-TRGTYPE sy-vline 
WA_LSRSCREEN_STR-TRGNAME sy-vline 
WA_LSRSCREEN_STR-TRGLC sy-vline 
WA_LSRSCREEN_STR-SRCLEN sy-vline 
WA_LSRSCREEN_STR-SRCTYPE sy-vline 
WA_LSRSCREEN_STR-SRCNAME sy-vline 
WA_LSRSCREEN_STR-SRCLC sy-vline 
WA_LSRSCREEN_STR-SRCLEN_2 sy-vline 
WA_LSRSCREEN_STR-SRCTYPE_2 sy-vline 
WA_LSRSCREEN_STR-SRCNAME_2 sy-vline 
WA_LSRSCREEN_STR-SRCLC_2 sy-vline 
WA_LSRSCREEN_STR-SRCLEN_3 sy-vline 
WA_LSRSCREEN_STR-SRCTYPE_3 sy-vline 
WA_LSRSCREEN_STR-SRCNAME_3 sy-vline 
WA_LSRSCREEN_STR-SRCLC_3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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