ABAP Select data from SAP table DITSL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DITSL
*  INTO TABLE @DATA(IT_DITSL2).
*--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_DITSL INDEX 1 INTO DATA(WA_DITSL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DITSL>-ISOLSEL = 1.
<DITSL>-CLIENT = 1.
<DITSL>-ISLNR = 1.
<DITSL>-ISLVR = 1.
<DITSL>-LANGU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DITSL-ISLTXT, sy-vline,
  WA_DITSL-INDLTXT, sy-vline,
  WA_DITSL-TRSTAT, sy-vline,
  WA_DITSL-ERNAM, sy-vline,
  WA_DITSL-ERDAT, sy-vline,
  WA_DITSL-ERTIM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DITSL 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_DITSL 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_DITSL INTO WA_DITSL.


*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.

*Conversion exit ALPHA, internal->external for field ISLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DITSL-ISLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DITSL-ISLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DITSL-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DITSL-LANGU.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DITSL_STR, 
ISOLSEL TYPE STRING,
CLIENT TYPE STRING,
ISLNR TYPE STRING,
ISLVR TYPE STRING,
LANGU TYPE STRING,
ISLTXT TYPE STRING,
INDLTXT TYPE STRING,
TRSTAT TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
FLGDEL TYPE STRING,
ISLTP TYPE STRING,
RBNR TYPE STRING,
ISLART TYPE STRING,
VALDTFRM TYPE STRING,
VALDTTO TYPE STRING,
COPER TYPE STRING,
ISLST TYPE STRING,
TKCAT TYPE STRING,
ACTCAT TYPE STRING,
ISOLICON TYPE STRING,
LINKICON TYPE STRING,
ITEMNR TYPE STRING,
FLGUPD TYPE STRING,
STTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DITSL_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_DITSL_STR-ISOLSEL sy-vline 
WA_DITSL_STR-CLIENT sy-vline 
WA_DITSL_STR-ISLNR sy-vline 
WA_DITSL_STR-ISLVR sy-vline 
WA_DITSL_STR-LANGU sy-vline 
WA_DITSL_STR-ISLTXT sy-vline 
WA_DITSL_STR-INDLTXT sy-vline 
WA_DITSL_STR-TRSTAT sy-vline 
WA_DITSL_STR-ERNAM sy-vline 
WA_DITSL_STR-ERDAT sy-vline 
WA_DITSL_STR-ERTIM sy-vline 
WA_DITSL_STR-AENAM sy-vline 
WA_DITSL_STR-AEDAT sy-vline 
WA_DITSL_STR-AETIM sy-vline 
WA_DITSL_STR-FLGDEL sy-vline 
WA_DITSL_STR-ISLTP sy-vline 
WA_DITSL_STR-RBNR sy-vline 
WA_DITSL_STR-ISLART sy-vline 
WA_DITSL_STR-VALDTFRM sy-vline 
WA_DITSL_STR-VALDTTO sy-vline 
WA_DITSL_STR-COPER sy-vline 
WA_DITSL_STR-ISLST sy-vline 
WA_DITSL_STR-TKCAT sy-vline 
WA_DITSL_STR-ACTCAT sy-vline 
WA_DITSL_STR-ISOLICON sy-vline 
WA_DITSL_STR-LINKICON sy-vline 
WA_DITSL_STR-ITEMNR sy-vline 
WA_DITSL_STR-FLGUPD sy-vline 
WA_DITSL_STR-STTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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