ABAP Select data from SAP table SLS_TCOMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SLS_TCOMP 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_TCOMP. 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_TCOMP 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_TCOMP TYPE STANDARD TABLE OF SLS_TCOMP,
      WA_SLS_TCOMP TYPE SLS_TCOMP,
      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_TCOMP> TYPE SLS_TCOMP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLS_TCOMP
*  INTO TABLE @DATA(IT_SLS_TCOMP2).
*--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_TCOMP INDEX 1 INTO DATA(WA_SLS_TCOMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLS_TCOMP>-MANDT = 1.
<SLS_TCOMP>-TESTID = 1.
<SLS_TCOMP>-PCLASST = 1.
<SLS_TCOMP>-PGUIDT = 1.
<SLS_TCOMP>-TFORM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLS_TCOMP-STID, sy-vline,
  WA_SLS_TCOMP-PUID, sy-vline,
  WA_SLS_TCOMP-PCLASSP, sy-vline,
  WA_SLS_TCOMP-PGUIDP, sy-vline,
  WA_SLS_TCOMP-ITEMID, sy-vline,
  WA_SLS_TCOMP-PCLASSI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLS_TCOMP 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_TCOMP 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_TCOMP INTO WA_SLS_TCOMP.


*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_TCOMP_STR, 
MANDT TYPE STRING,
TESTID TYPE STRING,
PCLASST TYPE STRING,
PGUIDT TYPE STRING,
TFORM TYPE STRING,
STID TYPE STRING,
PUID TYPE STRING,
PCLASSP TYPE STRING,
PGUIDP TYPE STRING,
ITEMID TYPE STRING,
PCLASSI TYPE STRING,
PGUIDI TYPE STRING,
SAVEOK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLS_TCOMP_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_TCOMP_STR-MANDT sy-vline 
WA_SLS_TCOMP_STR-TESTID sy-vline 
WA_SLS_TCOMP_STR-PCLASST sy-vline 
WA_SLS_TCOMP_STR-PGUIDT sy-vline 
WA_SLS_TCOMP_STR-TFORM sy-vline 
WA_SLS_TCOMP_STR-STID sy-vline 
WA_SLS_TCOMP_STR-PUID sy-vline 
WA_SLS_TCOMP_STR-PCLASSP sy-vline 
WA_SLS_TCOMP_STR-PGUIDP sy-vline 
WA_SLS_TCOMP_STR-ITEMID sy-vline 
WA_SLS_TCOMP_STR-PCLASSI sy-vline 
WA_SLS_TCOMP_STR-PGUIDI sy-vline 
WA_SLS_TCOMP_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.