ABAP Select data from SAP table ITCTA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ITCTA
*  INTO TABLE @DATA(IT_ITCTA2).
*--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_ITCTA INDEX 1 INTO DATA(WA_ITCTA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ITCTA>-TDPRINTER = 1.
<ITCTA>-TDFORM = 1.
<ITCTA>-TDSCRFORM = 1.
<ITCTA>-TDOSPRAS = 1.
<ITCTA>-TDSPRAS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ITCTA-TDTRANSTAT, sy-vline,
  WA_ITCTA-TDSTATUS, sy-vline,
  WA_ITCTA-TDTEXT, sy-vline,
  WA_ITCTA-TDFIRSTPAG, sy-vline,
  WA_ITCTA-TDFPAGIND, sy-vline,
  WA_ITCTA-TDFIRSTPAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ITCTA 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_ITCTA 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_ITCTA INTO WA_ITCTA.


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

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

*Conversion exit SPDEV, internal->external for field TDRDIDEV
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_ITCTA-TDRDIDEV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ITCTA-TDRDIDEV.
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_ITCTA_STR, 
TDPRINTER TYPE STRING,
TDFORM TYPE STRING,
TDSCRFORM TYPE STRING,
TDOSPRAS TYPE STRING,
TDSPRAS TYPE STRING,
TDTRANSTAT TYPE STRING,
TDSTATUS TYPE STRING,
TDTEXT TYPE STRING,
TDFIRSTPAG TYPE STRING,
TDFPAGIND TYPE STRING,
TDFIRSTPAR TYPE STRING,
TDFPARIND TYPE STRING,
TDPAGEFORM TYPE STRING,
TDPAGEORTN TYPE STRING,
TDPAGHEIGH TYPE STRING,
TDPAGWIDTH TYPE STRING,
TDCPI TYPE STRING,
TDPITCHS TYPE STRING,
TDLPI TYPE STRING,
TDLEADINGS TYPE STRING,
TDTABDIST TYPE STRING,
TDTABDISTU TYPE STRING,
TDTABDISTS TYPE STRING,
TDFAMILY TYPE STRING,
TDHEIGHT TYPE STRING,
TDBOLD TYPE STRING,
TDITALIC TYPE STRING,
TDCAPS TYPE STRING,
TDUNDERLIN TYPE STRING,
TDULPOS TYPE STRING,
TDULPOSU TYPE STRING,
TDULPOSS TYPE STRING,
TDULTHICK TYPE STRING,
TDULTHICKU TYPE STRING,
TDULTHICKS 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,
TDOCLASS TYPE STRING,
TDVERSION TYPE STRING,
PVERS TYPE STRING,
TDPGPRINT TYPE STRING,
TDDEFFAM TYPE STRING,
TDLANGVEC TYPE STRING,
TDRDI TYPE STRING,
TDRDIDEV TYPE STRING,
TDDUMMY TYPE STRING,
TDDEFHGHT TYPE STRING,
TDNOMIRROR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ITCTA_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_ITCTA_STR-TDPRINTER sy-vline 
WA_ITCTA_STR-TDFORM sy-vline 
WA_ITCTA_STR-TDSCRFORM sy-vline 
WA_ITCTA_STR-TDOSPRAS sy-vline 
WA_ITCTA_STR-TDSPRAS sy-vline 
WA_ITCTA_STR-TDTRANSTAT sy-vline 
WA_ITCTA_STR-TDSTATUS sy-vline 
WA_ITCTA_STR-TDTEXT sy-vline 
WA_ITCTA_STR-TDFIRSTPAG sy-vline 
WA_ITCTA_STR-TDFPAGIND sy-vline 
WA_ITCTA_STR-TDFIRSTPAR sy-vline 
WA_ITCTA_STR-TDFPARIND sy-vline 
WA_ITCTA_STR-TDPAGEFORM sy-vline 
WA_ITCTA_STR-TDPAGEORTN sy-vline 
WA_ITCTA_STR-TDPAGHEIGH sy-vline 
WA_ITCTA_STR-TDPAGWIDTH sy-vline 
WA_ITCTA_STR-TDCPI sy-vline 
WA_ITCTA_STR-TDPITCHS sy-vline 
WA_ITCTA_STR-TDLPI sy-vline 
WA_ITCTA_STR-TDLEADINGS sy-vline 
WA_ITCTA_STR-TDTABDIST sy-vline 
WA_ITCTA_STR-TDTABDISTU sy-vline 
WA_ITCTA_STR-TDTABDISTS sy-vline 
WA_ITCTA_STR-TDFAMILY sy-vline 
WA_ITCTA_STR-TDHEIGHT sy-vline 
WA_ITCTA_STR-TDBOLD sy-vline 
WA_ITCTA_STR-TDITALIC sy-vline 
WA_ITCTA_STR-TDCAPS sy-vline 
WA_ITCTA_STR-TDUNDERLIN sy-vline 
WA_ITCTA_STR-TDULPOS sy-vline 
WA_ITCTA_STR-TDULPOSU sy-vline 
WA_ITCTA_STR-TDULPOSS sy-vline 
WA_ITCTA_STR-TDULTHICK sy-vline 
WA_ITCTA_STR-TDULTHICKU sy-vline 
WA_ITCTA_STR-TDULTHICKS sy-vline 
WA_ITCTA_STR-TDULGREY sy-vline 
WA_ITCTA_STR-TDFUSER sy-vline 
WA_ITCTA_STR-TDFDATE sy-vline 
WA_ITCTA_STR-TDFTIME sy-vline 
WA_ITCTA_STR-TDFRELES sy-vline 
WA_ITCTA_STR-TDLUSER sy-vline 
WA_ITCTA_STR-TDLDATE sy-vline 
WA_ITCTA_STR-TDLTIME sy-vline 
WA_ITCTA_STR-TDLRELES sy-vline 
WA_ITCTA_STR-TDOCLASS sy-vline 
WA_ITCTA_STR-TDVERSION sy-vline 
WA_ITCTA_STR-PVERS sy-vline 
WA_ITCTA_STR-TDPGPRINT sy-vline 
WA_ITCTA_STR-TDDEFFAM sy-vline 
WA_ITCTA_STR-TDLANGVEC sy-vline 
WA_ITCTA_STR-TDRDI sy-vline 
WA_ITCTA_STR-TDRDIDEV sy-vline 
WA_ITCTA_STR-TDDUMMY sy-vline 
WA_ITCTA_STR-TDDEFHGHT sy-vline 
WA_ITCTA_STR-TDNOMIRROR sy-vline      INTO ld_text SEPARATED BY SPACE.

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