ABAP Select data from SAP table CATS_INCL2 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 CATS_INCL2 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 CATS_INCL2. 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 CATS_INCL2 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_CATS_INCL2 TYPE STANDARD TABLE OF CATS_INCL2,
      WA_CATS_INCL2 TYPE CATS_INCL2,
      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: <CATS_INCL2> TYPE CATS_INCL2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CATS_INCL2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CATS_INCL2
  INTO TABLE IT_CATS_INCL2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CATS_INCL2
*  INTO TABLE @DATA(IT_CATS_INCL22).
*--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_CATS_INCL2 INDEX 1 INTO DATA(WA_CATS_INCL22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CATS_INCL2 ASSIGNING <CATS_INCL2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CATS_INCL2>-ERSDA = 1.
<CATS_INCL2>-ERSTM = 1.
<CATS_INCL2>-ERNAM = 1.
<CATS_INCL2>-LAEDA = 1.
<CATS_INCL2>-LAETM = 1.

ENDLOOP.

LOOP AT IT_CATS_INCL2 INTO WA_CATS_INCL2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CATS_INCL2-AENAM, sy-vline,
  WA_CATS_INCL2-APNAM, sy-vline,
  WA_CATS_INCL2-APDAT, sy-vline,
  WA_CATS_INCL2-WORKITEMID, sy-vline,
  WA_CATS_INCL2-LOGSYS, sy-vline,
  WA_CATS_INCL2-STATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CATS_INCL2 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_CATS_INCL2 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_CATS_INCL2 INTO WA_CATS_INCL2.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_INCL2-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_INCL2-LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_INCL2-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_INCL2-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXTSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_INCL2-EXTSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_INCL2-EXTSYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TASKCOUNTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_INCL2-TASKCOUNTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_INCL2-TASKCOUNTER.
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_CATS_INCL2_STR, 
ERSDA TYPE STRING,
ERSTM TYPE STRING,
ERNAM TYPE STRING,
LAEDA TYPE STRING,
LAETM TYPE STRING,
AENAM TYPE STRING,
APNAM TYPE STRING,
APDAT TYPE STRING,
WORKITEMID TYPE STRING,
LOGSYS TYPE STRING,
STATUS TYPE STRING,
REFCOUNTER TYPE STRING,
REASON TYPE STRING,
BELNR TYPE STRING,
EXTSYSTEM TYPE STRING,
EXTAPPLICATION TYPE STRING,
EXTDOCUMENTNO TYPE STRING,
TASKCOUNTER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CATS_INCL2_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_CATS_INCL2_STR-ERSDA sy-vline 
WA_CATS_INCL2_STR-ERSTM sy-vline 
WA_CATS_INCL2_STR-ERNAM sy-vline 
WA_CATS_INCL2_STR-LAEDA sy-vline 
WA_CATS_INCL2_STR-LAETM sy-vline 
WA_CATS_INCL2_STR-AENAM sy-vline 
WA_CATS_INCL2_STR-APNAM sy-vline 
WA_CATS_INCL2_STR-APDAT sy-vline 
WA_CATS_INCL2_STR-WORKITEMID sy-vline 
WA_CATS_INCL2_STR-LOGSYS sy-vline 
WA_CATS_INCL2_STR-STATUS sy-vline 
WA_CATS_INCL2_STR-REFCOUNTER sy-vline 
WA_CATS_INCL2_STR-REASON sy-vline 
WA_CATS_INCL2_STR-BELNR sy-vline 
WA_CATS_INCL2_STR-EXTSYSTEM sy-vline 
WA_CATS_INCL2_STR-EXTAPPLICATION sy-vline 
WA_CATS_INCL2_STR-EXTDOCUMENTNO sy-vline 
WA_CATS_INCL2_STR-TASKCOUNTER sy-vline      INTO ld_text SEPARATED BY SPACE.

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