ABAP Select data from SAP table TDSYH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDSYH
*  INTO TABLE @DATA(IT_TDSYH2).
*--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_TDSYH INDEX 1 INTO DATA(WA_TDSYH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDSYH>-DOKCLASS = 1.
<TDSYH>-DOKNAME = 1.
<TDSYH>-DOKLANGU = 1.
<TDSYH>-DOKASPCT = 1.
<TDSYH>-DOKVERSION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDSYH-DOKSTATE, sy-vline,
  WA_TDSYH-DOKFORM, sy-vline,
  WA_TDSYH-DOKSTYLE, sy-vline,
  WA_TDSYH-DOKFUSER, sy-vline,
  WA_TDSYH-DOKFRELES, sy-vline,
  WA_TDSYH-DOKFDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDSYH 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_TDSYH 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_TDSYH INTO WA_TDSYH.


*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 ISOLA, internal->external for field DOKLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TDSYH-DOKLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDSYH-DOKLANGU.
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_TDSYH_STR, 
DOKCLASS TYPE STRING,
DOKNAME TYPE STRING,
DOKLANGU TYPE STRING,
DOKASPCT TYPE STRING,
DOKVERSION TYPE STRING,
DOKSTATE TYPE STRING,
DOKFORM TYPE STRING,
DOKSTYLE TYPE STRING,
DOKFUSER TYPE STRING,
DOKFRELES TYPE STRING,
DOKFDATE TYPE STRING,
DOKFTIME TYPE STRING,
DOKLUSER TYPE STRING,
DOKLRELES TYPE STRING,
DOKLDATE TYPE STRING,
DOKLTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDSYH_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_TDSYH_STR-DOKCLASS sy-vline 
WA_TDSYH_STR-DOKNAME sy-vline 
WA_TDSYH_STR-DOKLANGU sy-vline 
WA_TDSYH_STR-DOKASPCT sy-vline 
WA_TDSYH_STR-DOKVERSION sy-vline 
WA_TDSYH_STR-DOKSTATE sy-vline 
WA_TDSYH_STR-DOKFORM sy-vline 
WA_TDSYH_STR-DOKSTYLE sy-vline 
WA_TDSYH_STR-DOKFUSER sy-vline 
WA_TDSYH_STR-DOKFRELES sy-vline 
WA_TDSYH_STR-DOKFDATE sy-vline 
WA_TDSYH_STR-DOKFTIME sy-vline 
WA_TDSYH_STR-DOKLUSER sy-vline 
WA_TDSYH_STR-DOKLRELES sy-vline 
WA_TDSYH_STR-DOKLDATE sy-vline 
WA_TDSYH_STR-DOKLTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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