ABAP Select data from SAP table ITCDA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ITCDA
*  INTO TABLE @DATA(IT_ITCDA2).
*--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_ITCDA INDEX 1 INTO DATA(WA_ITCDA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ITCDA>-TDPRINTER = 1.
<ITCDA>-TDSTYLE = 1.
<ITCDA>-TDCPI = 1.
<ITCDA>-TDLPI = 1.
<ITCDA>-TDSPRAS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ITCDA-TDOSPRAS, sy-vline,
  WA_ITCDA-TDTRANSTAT, sy-vline,
  WA_ITCDA-TDSTATUS, sy-vline,
  WA_ITCDA-TDTEXT, sy-vline,
  WA_ITCDA-TDFPARIND, sy-vline,
  WA_ITCDA-TDFIRSTPAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ITCDA 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_ITCDA 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_ITCDA INTO WA_ITCDA.


*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 TDSPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ITCDA-TDSPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ITCDA-TDSPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field TDOSPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ITCDA-TDOSPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ITCDA-TDOSPRAS.
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_ITCDA_STR, 
TDPRINTER TYPE STRING,
TDSTYLE TYPE STRING,
TDCPI TYPE STRING,
TDLPI TYPE STRING,
TDSPRAS TYPE STRING,
TDOSPRAS TYPE STRING,
TDTRANSTAT TYPE STRING,
TDSTATUS TYPE STRING,
TDTEXT TYPE STRING,
TDFPARIND TYPE STRING,
TDFIRSTPAR TYPE STRING,
TDULGREY TYPE STRING,
TDFUSER TYPE STRING,
TDFDATE TYPE STRING,
TDFTIME TYPE STRING,
TDFRELES TYPE STRING,
TDLUSER TYPE STRING,
TDLDATE TYPE STRING,
TDLTIME TYPE STRING,
TDLRELES TYPE STRING,
TDVERSION TYPE STRING,
PVERS TYPE STRING,
TDPGPRINT TYPE STRING,
TDDUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ITCDA_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_ITCDA_STR-TDPRINTER sy-vline 
WA_ITCDA_STR-TDSTYLE sy-vline 
WA_ITCDA_STR-TDCPI sy-vline 
WA_ITCDA_STR-TDLPI sy-vline 
WA_ITCDA_STR-TDSPRAS sy-vline 
WA_ITCDA_STR-TDOSPRAS sy-vline 
WA_ITCDA_STR-TDTRANSTAT sy-vline 
WA_ITCDA_STR-TDSTATUS sy-vline 
WA_ITCDA_STR-TDTEXT sy-vline 
WA_ITCDA_STR-TDFPARIND sy-vline 
WA_ITCDA_STR-TDFIRSTPAR sy-vline 
WA_ITCDA_STR-TDULGREY sy-vline 
WA_ITCDA_STR-TDFUSER sy-vline 
WA_ITCDA_STR-TDFDATE sy-vline 
WA_ITCDA_STR-TDFTIME sy-vline 
WA_ITCDA_STR-TDFRELES sy-vline 
WA_ITCDA_STR-TDLUSER sy-vline 
WA_ITCDA_STR-TDLDATE sy-vline 
WA_ITCDA_STR-TDLTIME sy-vline 
WA_ITCDA_STR-TDLRELES sy-vline 
WA_ITCDA_STR-TDVERSION sy-vline 
WA_ITCDA_STR-PVERS sy-vline 
WA_ITCDA_STR-TDPGPRINT sy-vline 
WA_ITCDA_STR-TDDUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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