ABAP Select data from SAP table SLS_STEST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SLS_STEST 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_STEST. 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_STEST 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_STEST TYPE STANDARD TABLE OF SLS_STEST,
      WA_SLS_STEST TYPE SLS_STEST,
      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_STEST> TYPE SLS_STEST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLS_STEST
*  INTO TABLE @DATA(IT_SLS_STEST2).
*--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_STEST INDEX 1 INTO DATA(WA_SLS_STEST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLS_STEST>-MANDT = 1.
<SLS_STEST>-TESTID = 1.
<SLS_STEST>-CLASS = 1.
<SLS_STEST>-GUID = 1.
<SLS_STEST>-PCLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLS_STEST-PGUID, sy-vline,
  WA_SLS_STEST-VAR1, sy-vline,
  WA_SLS_STEST-VAR2, sy-vline,
  WA_SLS_STEST-VAR3, sy-vline,
  WA_SLS_STEST-VAR4, sy-vline,
  WA_SLS_STEST-TNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLS_STEST 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_STEST 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_STEST INTO WA_SLS_STEST.


*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_STEST_STR, 
MANDT TYPE STRING,
TESTID TYPE STRING,
CLASS TYPE STRING,
GUID TYPE STRING,
PCLASS TYPE STRING,
PGUID TYPE STRING,
VAR1 TYPE STRING,
VAR2 TYPE STRING,
VAR3 TYPE STRING,
VAR4 TYPE STRING,
TNAME TYPE STRING,
DESCR TYPE STRING,
TVERS TYPE STRING,
TARGET TYPE STRING,
SAVRES TYPE STRING,
TSCENARIO TYPE STRING,
TFORMAT TYPE STRING,
TRDTITLE TYPE STRING,
TRDCONT TYPE STRING,
TRDCLASS TYPE STRING,
ALLITEM TYPE STRING,
TIMELIMIT TYPE STRING,
ITEMNUM TYPE STRING,
DYNITEM TYPE STRING,
STRVISI TYPE STRING,
TFSELECT TYPE STRING,
ORDRANDOM TYPE STRING,
SCORING TYPE STRING,
CUTOFF TYPE STRING,
MAXPT TYPE STRING,
POSTEDIT TYPE STRING,
FBTYPE TYPE STRING,
ITEMTREAT TYPE STRING,
SAVEOK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLS_STEST_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_STEST_STR-MANDT sy-vline 
WA_SLS_STEST_STR-TESTID sy-vline 
WA_SLS_STEST_STR-CLASS sy-vline 
WA_SLS_STEST_STR-GUID sy-vline 
WA_SLS_STEST_STR-PCLASS sy-vline 
WA_SLS_STEST_STR-PGUID sy-vline 
WA_SLS_STEST_STR-VAR1 sy-vline 
WA_SLS_STEST_STR-VAR2 sy-vline 
WA_SLS_STEST_STR-VAR3 sy-vline 
WA_SLS_STEST_STR-VAR4 sy-vline 
WA_SLS_STEST_STR-TNAME sy-vline 
WA_SLS_STEST_STR-DESCR sy-vline 
WA_SLS_STEST_STR-TVERS sy-vline 
WA_SLS_STEST_STR-TARGET sy-vline 
WA_SLS_STEST_STR-SAVRES sy-vline 
WA_SLS_STEST_STR-TSCENARIO sy-vline 
WA_SLS_STEST_STR-TFORMAT sy-vline 
WA_SLS_STEST_STR-TRDTITLE sy-vline 
WA_SLS_STEST_STR-TRDCONT sy-vline 
WA_SLS_STEST_STR-TRDCLASS sy-vline 
WA_SLS_STEST_STR-ALLITEM sy-vline 
WA_SLS_STEST_STR-TIMELIMIT sy-vline 
WA_SLS_STEST_STR-ITEMNUM sy-vline 
WA_SLS_STEST_STR-DYNITEM sy-vline 
WA_SLS_STEST_STR-STRVISI sy-vline 
WA_SLS_STEST_STR-TFSELECT sy-vline 
WA_SLS_STEST_STR-ORDRANDOM sy-vline 
WA_SLS_STEST_STR-SCORING sy-vline 
WA_SLS_STEST_STR-CUTOFF sy-vline 
WA_SLS_STEST_STR-MAXPT sy-vline 
WA_SLS_STEST_STR-POSTEDIT sy-vline 
WA_SLS_STEST_STR-FBTYPE sy-vline 
WA_SLS_STEST_STR-ITEMTREAT sy-vline 
WA_SLS_STEST_STR-SAVEOK sy-vline      INTO ld_text SEPARATED BY SPACE.

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