ABAP Select data from SAP table CATI into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CATI
*  INTO TABLE @DATA(IT_CATI2).
*--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_CATI INDEX 1 INTO DATA(WA_CATI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CATI>-ABLNR = 1.
<CATI>-SPRAS = 1.
<CATI>-ATYP = 1.
<CATI>-MODEL = 1.
<CATI>-APPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CATI-SAPPL, sy-vline,
  WA_CATI-THST1, sy-vline,
  WA_CATI-RVON, sy-vline,
  WA_CATI-PRREL, sy-vline,
  WA_CATI-RBIS, sy-vline,
  WA_CATI-FREIG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CATI 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_CATI 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_CATI INTO WA_CATI.


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

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

*Conversion exit ISOLA, internal->external for field SPRAK
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CATI-SPRAK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATI-SPRAK.
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_CATI_STR, 
ABLNR TYPE STRING,
SPRAS TYPE STRING,
ATYP TYPE STRING,
MODEL TYPE STRING,
APPL TYPE STRING,
SAPPL TYPE STRING,
THST1 TYPE STRING,
RVON TYPE STRING,
PRREL TYPE STRING,
RBIS TYPE STRING,
FREIG TYPE STRING,
OSPRA TYPE STRING,
ERFAS TYPE STRING,
AENDER TYPE STRING,
MUSER TYPE STRING,
NUTZB TYPE STRING,
NUPLA TYPE STRING,
NUANW TYPE STRING,
NULAN TYPE STRING,
NUIND TYPE STRING,
NUHOT TYPE STRING,
ABHNG TYPE STRING,
ABFRO TYPE STRING,
ABPLA TYPE STRING,
ABSPR TYPE STRING,
ABLAN TYPE STRING,
ABKON TYPE STRING,
SPRAK TYPE STRING,
LANDK TYPE STRING,
KONTK TYPE STRING,
KTEXT TYPE STRING,
SUCH1 TYPE STRING,
SUCH2 TYPE STRING,
SUCH3 TYPE STRING,
SUCH4 TYPE STRING,
SUCH5 TYPE STRING,
SA_FC0 TYPE STRING,
FKTC TYPE STRING,
REFNR TYPE STRING,
TABNA TYPE STRING,
TCODE TYPE STRING,
DYNNR TYPE STRING,
MPOOL TYPE STRING,
TESTA_ER1 TYPE STRING,
FBAU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CATI_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_CATI_STR-ABLNR sy-vline 
WA_CATI_STR-SPRAS sy-vline 
WA_CATI_STR-ATYP sy-vline 
WA_CATI_STR-MODEL sy-vline 
WA_CATI_STR-APPL sy-vline 
WA_CATI_STR-SAPPL sy-vline 
WA_CATI_STR-THST1 sy-vline 
WA_CATI_STR-RVON sy-vline 
WA_CATI_STR-PRREL sy-vline 
WA_CATI_STR-RBIS sy-vline 
WA_CATI_STR-FREIG sy-vline 
WA_CATI_STR-OSPRA sy-vline 
WA_CATI_STR-ERFAS sy-vline 
WA_CATI_STR-AENDER sy-vline 
WA_CATI_STR-MUSER sy-vline 
WA_CATI_STR-NUTZB sy-vline 
WA_CATI_STR-NUPLA sy-vline 
WA_CATI_STR-NUANW sy-vline 
WA_CATI_STR-NULAN sy-vline 
WA_CATI_STR-NUIND sy-vline 
WA_CATI_STR-NUHOT sy-vline 
WA_CATI_STR-ABHNG sy-vline 
WA_CATI_STR-ABFRO sy-vline 
WA_CATI_STR-ABPLA sy-vline 
WA_CATI_STR-ABSPR sy-vline 
WA_CATI_STR-ABLAN sy-vline 
WA_CATI_STR-ABKON sy-vline 
WA_CATI_STR-SPRAK sy-vline 
WA_CATI_STR-LANDK sy-vline 
WA_CATI_STR-KONTK sy-vline 
WA_CATI_STR-KTEXT sy-vline 
WA_CATI_STR-SUCH1 sy-vline 
WA_CATI_STR-SUCH2 sy-vline 
WA_CATI_STR-SUCH3 sy-vline 
WA_CATI_STR-SUCH4 sy-vline 
WA_CATI_STR-SUCH5 sy-vline 
WA_CATI_STR-SA_FC0 sy-vline 
WA_CATI_STR-FKTC sy-vline 
WA_CATI_STR-REFNR sy-vline 
WA_CATI_STR-TABNA sy-vline 
WA_CATI_STR-TCODE sy-vline 
WA_CATI_STR-DYNNR sy-vline 
WA_CATI_STR-MPOOL sy-vline 
WA_CATI_STR-TESTA_ER1 sy-vline 
WA_CATI_STR-FBAU sy-vline      INTO ld_text SEPARATED BY SPACE.

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