ABAP Select data from SAP table CATS_INCL1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CATS_INCL1 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_INCL1. 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_INCL1 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_INCL1 TYPE STANDARD TABLE OF CATS_INCL1,
      WA_CATS_INCL1 TYPE CATS_INCL1,
      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_INCL1> TYPE CATS_INCL1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CATS_INCL1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CATS_INCL1
  INTO TABLE IT_CATS_INCL1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CATS_INCL1
*  INTO TABLE @DATA(IT_CATS_INCL12).
*--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_INCL1 INDEX 1 INTO DATA(WA_CATS_INCL12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CATS_INCL1 ASSIGNING <CATS_INCL1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CATS_INCL1>-AWART = 1.
<CATS_INCL1>-LGART = 1.
<CATS_INCL1>-KAPID = 1.
<CATS_INCL1>-SPLIT = 1.
<CATS_INCL1>-REINR = 1.

ENDLOOP.

LOOP AT IT_CATS_INCL1 INTO WA_CATS_INCL1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CATS_INCL1-WABLNR, sy-vline,
  WA_CATS_INCL1-VERSL, sy-vline,
  WA_CATS_INCL1-WTART, sy-vline,
  WA_CATS_INCL1-BWGRL, sy-vline,
  WA_CATS_INCL1-WAERS, sy-vline,
  WA_CATS_INCL1-AUFKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CATS_INCL1 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_INCL1 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_INCL1 INTO WA_CATS_INCL1.


*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 WABLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_INCL1-WABLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_INCL1-WABLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CATS_INCL1-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_INCL1-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HRKOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_INCL1-HRKOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_INCL1-HRKOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HRGRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_INCL1-HRGRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_INCL1-HRGRANT_NBR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CATS_INCL1-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_INCL1-UNIT.
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_INCL1_STR, 
AWART TYPE STRING,
LGART TYPE STRING,
KAPID TYPE STRING,
SPLIT TYPE STRING,
REINR TYPE STRING,
WABLNR TYPE STRING,
VERSL TYPE STRING,
WTART TYPE STRING,
BWGRL TYPE STRING,
WAERS TYPE STRING,
AUFKZ TYPE STRING,
TRFGR TYPE STRING,
TRFST TYPE STRING,
PRAKN TYPE STRING,
PRAKZ TYPE STRING,
OTYPE TYPE STRING,
PLANS TYPE STRING,
KOKRS TYPE STRING,
MEINH TYPE STRING,
TCURR TYPE STRING,
PRICE TYPE STRING,
ARBID TYPE STRING,
WERKS TYPE STRING,
AUTYP TYPE STRING,
HRCOSTASG TYPE STRING,
HRKOSTL TYPE STRING,
HRLSTAR TYPE STRING,
HRFUND TYPE STRING,
HRFUNC_AREA TYPE STRING,
HRGRANT_NBR TYPE STRING,
BEMOT TYPE STRING,
UNIT TYPE STRING,
STATKEYFIG TYPE STRING,
TASKTYPE TYPE STRING,
TASKLEVEL TYPE STRING,
TASKCOMPONENT TYPE STRING,
BUKRS TYPE STRING,
CPR_GUID TYPE STRING,
CPR_EXTID TYPE STRING,
CPR_OBJGUID TYPE STRING,
CPR_OBJGEXTID TYPE STRING,
CPR_OBJTYPE TYPE STRING,
HRBUDGET_PD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CATS_INCL1_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_INCL1_STR-AWART sy-vline 
WA_CATS_INCL1_STR-LGART sy-vline 
WA_CATS_INCL1_STR-KAPID sy-vline 
WA_CATS_INCL1_STR-SPLIT sy-vline 
WA_CATS_INCL1_STR-REINR sy-vline 
WA_CATS_INCL1_STR-WABLNR sy-vline 
WA_CATS_INCL1_STR-VERSL sy-vline 
WA_CATS_INCL1_STR-WTART sy-vline 
WA_CATS_INCL1_STR-BWGRL sy-vline 
WA_CATS_INCL1_STR-WAERS sy-vline 
WA_CATS_INCL1_STR-AUFKZ sy-vline 
WA_CATS_INCL1_STR-TRFGR sy-vline 
WA_CATS_INCL1_STR-TRFST sy-vline 
WA_CATS_INCL1_STR-PRAKN sy-vline 
WA_CATS_INCL1_STR-PRAKZ sy-vline 
WA_CATS_INCL1_STR-OTYPE sy-vline 
WA_CATS_INCL1_STR-PLANS sy-vline 
WA_CATS_INCL1_STR-KOKRS sy-vline 
WA_CATS_INCL1_STR-MEINH sy-vline 
WA_CATS_INCL1_STR-TCURR sy-vline 
WA_CATS_INCL1_STR-PRICE sy-vline 
WA_CATS_INCL1_STR-ARBID sy-vline 
WA_CATS_INCL1_STR-WERKS sy-vline 
WA_CATS_INCL1_STR-AUTYP sy-vline 
WA_CATS_INCL1_STR-HRCOSTASG sy-vline 
WA_CATS_INCL1_STR-HRKOSTL sy-vline 
WA_CATS_INCL1_STR-HRLSTAR sy-vline 
WA_CATS_INCL1_STR-HRFUND sy-vline 
WA_CATS_INCL1_STR-HRFUNC_AREA sy-vline 
WA_CATS_INCL1_STR-HRGRANT_NBR sy-vline 
WA_CATS_INCL1_STR-BEMOT sy-vline 
WA_CATS_INCL1_STR-UNIT sy-vline 
WA_CATS_INCL1_STR-STATKEYFIG sy-vline 
WA_CATS_INCL1_STR-TASKTYPE sy-vline 
WA_CATS_INCL1_STR-TASKLEVEL sy-vline 
WA_CATS_INCL1_STR-TASKCOMPONENT sy-vline 
WA_CATS_INCL1_STR-BUKRS sy-vline 
WA_CATS_INCL1_STR-CPR_GUID sy-vline 
WA_CATS_INCL1_STR-CPR_EXTID sy-vline 
WA_CATS_INCL1_STR-CPR_OBJGUID sy-vline 
WA_CATS_INCL1_STR-CPR_OBJGEXTID sy-vline 
WA_CATS_INCL1_STR-CPR_OBJTYPE sy-vline 
WA_CATS_INCL1_STR-HRBUDGET_PD sy-vline      INTO ld_text SEPARATED BY SPACE.

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