ABAP Select data from SAP table TTDS into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TTDS 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 TTDS. 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 TTDS 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_TTDS TYPE STANDARD TABLE OF TTDS,
      WA_TTDS TYPE TTDS,
      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: <TTDS> TYPE TTDS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TTDS
*  INTO TABLE @DATA(IT_TTDS2).
*--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_TTDS INDEX 1 INTO DATA(WA_TTDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TTDS>-MANDT = 1.
<TTDS>-TPLST = 1.
<TTDS>-FABKL = 1.
<TTDS>-ADRNR = 1.
<TTDS>-TPSID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TTDS-VTPARN, sy-vline,
  WA_TTDS-VTPART, sy-vline,
  WA_TTDS-KSCHL, sy-vline,
  WA_TTDS-NKETP, sy-vline,
  WA_TTDS-TRAEND, sy-vline,
  WA_TTDS-STTRG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TTDS 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_TTDS 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_TTDS INTO WA_TTDS.


*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 ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TTDS-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TTDS-ADRNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field STAGEW
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TTDS-STAGEW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TTDS-STAGEW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field STAVOL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TTDS-STAVOL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TTDS-STAVOL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field STADIS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_TTDS-STADIS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TTDS-STADIS.
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_TTDS_STR, 
MANDT TYPE STRING,
TPLST TYPE STRING,
FABKL TYPE STRING,
ADRNR TYPE STRING,
TPSID TYPE STRING,
VTPARN TYPE STRING,
VTPART TYPE STRING,
KSCHL TYPE STRING,
NKETP TYPE STRING,
TRAEND TYPE STRING,
STTRG TYPE STRING,
TPSSF TYPE STRING,
TPSTX1 TYPE STRING,
TPSTX2 TYPE STRING,
TPSTX3 TYPE STRING,
BUKRS TYPE STRING,
STAGEW TYPE STRING,
STAVOL TYPE STRING,
STADIS TYPE STRING,
STACUR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TTDS_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_TTDS_STR-MANDT sy-vline 
WA_TTDS_STR-TPLST sy-vline 
WA_TTDS_STR-FABKL sy-vline 
WA_TTDS_STR-ADRNR sy-vline 
WA_TTDS_STR-TPSID sy-vline 
WA_TTDS_STR-VTPARN sy-vline 
WA_TTDS_STR-VTPART sy-vline 
WA_TTDS_STR-KSCHL sy-vline 
WA_TTDS_STR-NKETP sy-vline 
WA_TTDS_STR-TRAEND sy-vline 
WA_TTDS_STR-STTRG sy-vline 
WA_TTDS_STR-TPSSF sy-vline 
WA_TTDS_STR-TPSTX1 sy-vline 
WA_TTDS_STR-TPSTX2 sy-vline 
WA_TTDS_STR-TPSTX3 sy-vline 
WA_TTDS_STR-BUKRS sy-vline 
WA_TTDS_STR-STAGEW sy-vline 
WA_TTDS_STR-STAVOL sy-vline 
WA_TTDS_STR-STADIS sy-vline 
WA_TTDS_STR-STACUR sy-vline      INTO ld_text SEPARATED BY SPACE.

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