ABAP Select data from SAP table SLDET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLDET
*  INTO TABLE @DATA(IT_SLDET2).
*--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_SLDET INDEX 1 INTO DATA(WA_SLDET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLDET>-SLDET1 = 1.
<SLDET>-SLDET2 = 1.
<SLDET>-SLDET3 = 1.
<SLDET>-SLDET4 = 1.
<SLDET>-SLDET5 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLDET-SLDET6, sy-vline,
  WA_SLDET-SLDET7, sy-vline,
  WA_SLDET-SLDET8, sy-vline,
  WA_SLDET-SLDET9, sy-vline,
  WA_SLDET-SLDET10, sy-vline,
  WA_SLDET-SLDET11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLDET 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_SLDET 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_SLDET INTO WA_SLDET.


*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_SLDET_STR, 
SLDET1 TYPE STRING,
SLDET2 TYPE STRING,
SLDET3 TYPE STRING,
SLDET4 TYPE STRING,
SLDET5 TYPE STRING,
SLDET6 TYPE STRING,
SLDET7 TYPE STRING,
SLDET8 TYPE STRING,
SLDET9 TYPE STRING,
SLDET10 TYPE STRING,
SLDET11 TYPE STRING,
SLDET12 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLDET_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_SLDET_STR-SLDET1 sy-vline 
WA_SLDET_STR-SLDET2 sy-vline 
WA_SLDET_STR-SLDET3 sy-vline 
WA_SLDET_STR-SLDET4 sy-vline 
WA_SLDET_STR-SLDET5 sy-vline 
WA_SLDET_STR-SLDET6 sy-vline 
WA_SLDET_STR-SLDET7 sy-vline 
WA_SLDET_STR-SLDET8 sy-vline 
WA_SLDET_STR-SLDET9 sy-vline 
WA_SLDET_STR-SLDET10 sy-vline 
WA_SLDET_STR-SLDET11 sy-vline 
WA_SLDET_STR-SLDET12 sy-vline      INTO ld_text SEPARATED BY SPACE.

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