ABAP Select data from SAP table SLS_TRES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLS_TRES
*  INTO TABLE @DATA(IT_SLS_TRES2).
*--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_SLS_TRES INDEX 1 INTO DATA(WA_SLS_TRES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLS_TRES>-TESTID = 1.
<SLS_TRES>-TECLASS = 1.
<SLS_TRES>-TEGUID = 1.
<SLS_TRES>-TEPCLASS = 1.
<SLS_TRES>-TEPGUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLS_TRES-TEVAR1, sy-vline,
  WA_SLS_TRES-TEVAR2, sy-vline,
  WA_SLS_TRES-TEVAR3, sy-vline,
  WA_SLS_TRES-TEVAR4, sy-vline,
  WA_SLS_TRES-TECONTX, sy-vline,
  WA_SLS_TRES-TETNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLS_TRES 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_SLS_TRES 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_SLS_TRES INTO WA_SLS_TRES.


*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_SLS_TRES_STR, 
TESTID TYPE STRING,
TECLASS TYPE STRING,
TEGUID TYPE STRING,
TEPCLASS TYPE STRING,
TEPGUID TYPE STRING,
TEVAR1 TYPE STRING,
TEVAR2 TYPE STRING,
TEVAR3 TYPE STRING,
TEVAR4 TYPE STRING,
TECONTX TYPE STRING,
TETNAME TYPE STRING,
TEDESCR TYPE STRING,
TETVERS TYPE STRING,
TETYPID TYPE STRING,
TETYPSH TYPE STRING,
TETYPTX TYPE STRING,
TECUTOFF TYPE STRING,
LOCID TYPE STRING,
LOCSH TYPE STRING,
LOCTX TYPE STRING,
EVPLVAR TYPE STRING,
EVID TYPE STRING,
EVSHT TYPE STRING,
EVSTX TYPE STRING,
EVBEG TYPE STRING,
EVBEGF TYPE STRING,
EVEND TYPE STRING,
EVENDF TYPE STRING,
EVPERIOD TYPE STRING,
ATPETID TYPE STRING,
ATTFORM TYPE STRING,
RESTID TYPE STRING,
RESTTX TYPE STRING,
REPUID TYPE STRING,
REPUTX TYPE STRING,
RETYPE TYPE STRING,
REPER TYPE STRING,
REPT TYPE STRING,
REPASS TYPE STRING,
REPAX TYPE STRING,
NO_TEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLS_TRES_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_SLS_TRES_STR-TESTID sy-vline 
WA_SLS_TRES_STR-TECLASS sy-vline 
WA_SLS_TRES_STR-TEGUID sy-vline 
WA_SLS_TRES_STR-TEPCLASS sy-vline 
WA_SLS_TRES_STR-TEPGUID sy-vline 
WA_SLS_TRES_STR-TEVAR1 sy-vline 
WA_SLS_TRES_STR-TEVAR2 sy-vline 
WA_SLS_TRES_STR-TEVAR3 sy-vline 
WA_SLS_TRES_STR-TEVAR4 sy-vline 
WA_SLS_TRES_STR-TECONTX sy-vline 
WA_SLS_TRES_STR-TETNAME sy-vline 
WA_SLS_TRES_STR-TEDESCR sy-vline 
WA_SLS_TRES_STR-TETVERS sy-vline 
WA_SLS_TRES_STR-TETYPID sy-vline 
WA_SLS_TRES_STR-TETYPSH sy-vline 
WA_SLS_TRES_STR-TETYPTX sy-vline 
WA_SLS_TRES_STR-TECUTOFF sy-vline 
WA_SLS_TRES_STR-LOCID sy-vline 
WA_SLS_TRES_STR-LOCSH sy-vline 
WA_SLS_TRES_STR-LOCTX sy-vline 
WA_SLS_TRES_STR-EVPLVAR sy-vline 
WA_SLS_TRES_STR-EVID sy-vline 
WA_SLS_TRES_STR-EVSHT sy-vline 
WA_SLS_TRES_STR-EVSTX sy-vline 
WA_SLS_TRES_STR-EVBEG sy-vline 
WA_SLS_TRES_STR-EVBEGF sy-vline 
WA_SLS_TRES_STR-EVEND sy-vline 
WA_SLS_TRES_STR-EVENDF sy-vline 
WA_SLS_TRES_STR-EVPERIOD sy-vline 
WA_SLS_TRES_STR-ATPETID sy-vline 
WA_SLS_TRES_STR-ATTFORM sy-vline 
WA_SLS_TRES_STR-RESTID sy-vline 
WA_SLS_TRES_STR-RESTTX sy-vline 
WA_SLS_TRES_STR-REPUID sy-vline 
WA_SLS_TRES_STR-REPUTX sy-vline 
WA_SLS_TRES_STR-RETYPE sy-vline 
WA_SLS_TRES_STR-REPER sy-vline 
WA_SLS_TRES_STR-REPT sy-vline 
WA_SLS_TRES_STR-REPASS sy-vline 
WA_SLS_TRES_STR-REPAX sy-vline 
WA_SLS_TRES_STR-NO_TEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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