ABAP Select data from SAP table CATSPS into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CATSPS 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 CATSPS. 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 CATSPS 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_CATSPS TYPE STANDARD TABLE OF CATSPS,
      WA_CATSPS TYPE CATSPS,
      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: <CATSPS> TYPE CATSPS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CATSPS
*  INTO TABLE @DATA(IT_CATSPS2).
*--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_CATSPS INDEX 1 INTO DATA(WA_CATSPS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CATSPS>-MANDT = 1.
<CATSPS>-COUNTER = 1.
<CATSPS>-STOKZ = 1.
<CATSPS>-PERNR = 1.
<CATSPS>-WORKDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CATSPS-RNPLNR, sy-vline,
  WA_CATSPS-RAUFPL, sy-vline,
  WA_CATSPS-RAPLZL, sy-vline,
  WA_CATSPS-KAPID, sy-vline,
  WA_CATSPS-SPLIT, sy-vline,
  WA_CATSPS-ARBID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CATSPS 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_CATSPS 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_CATSPS INTO WA_CATSPS.


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

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

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

*Conversion exit ALPHA, internal->external for field SKOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATSPS-SKOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATSPS-SKOSTL.
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_CATSPS_STR, 
MANDT TYPE STRING,
COUNTER TYPE STRING,
STOKZ TYPE STRING,
PERNR TYPE STRING,
WORKDATE TYPE STRING,
RNPLNR TYPE STRING,
RAUFPL TYPE STRING,
RAPLZL TYPE STRING,
KAPID TYPE STRING,
SPLIT TYPE STRING,
ARBID TYPE STRING,
WERKS TYPE STRING,
CATSHOURS TYPE STRING,
MEINH TYPE STRING,
OFMNW TYPE STRING,
PEDD TYPE STRING,
LSTAR TYPE STRING,
BEGUZ TYPE STRING,
ENDUZ TYPE STRING,
LTXA1 TYPE STRING,
AUERU TYPE STRING,
BELNR TYPE STRING,
TRANSFER TYPE STRING,
LGART TYPE STRING,
PRICE TYPE STRING,
TCURR TYPE STRING,
ERUZU TYPE STRING,
ERSDA TYPE STRING,
ERSTM TYPE STRING,
BEMOT TYPE STRING,
KOKRS TYPE STRING,
SKOSTL TYPE STRING,
FM_SPLIT_FLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CATSPS_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_CATSPS_STR-MANDT sy-vline 
WA_CATSPS_STR-COUNTER sy-vline 
WA_CATSPS_STR-STOKZ sy-vline 
WA_CATSPS_STR-PERNR sy-vline 
WA_CATSPS_STR-WORKDATE sy-vline 
WA_CATSPS_STR-RNPLNR sy-vline 
WA_CATSPS_STR-RAUFPL sy-vline 
WA_CATSPS_STR-RAPLZL sy-vline 
WA_CATSPS_STR-KAPID sy-vline 
WA_CATSPS_STR-SPLIT sy-vline 
WA_CATSPS_STR-ARBID sy-vline 
WA_CATSPS_STR-WERKS sy-vline 
WA_CATSPS_STR-CATSHOURS sy-vline 
WA_CATSPS_STR-MEINH sy-vline 
WA_CATSPS_STR-OFMNW sy-vline 
WA_CATSPS_STR-PEDD sy-vline 
WA_CATSPS_STR-LSTAR sy-vline 
WA_CATSPS_STR-BEGUZ sy-vline 
WA_CATSPS_STR-ENDUZ sy-vline 
WA_CATSPS_STR-LTXA1 sy-vline 
WA_CATSPS_STR-AUERU sy-vline 
WA_CATSPS_STR-BELNR sy-vline 
WA_CATSPS_STR-TRANSFER sy-vline 
WA_CATSPS_STR-LGART sy-vline 
WA_CATSPS_STR-PRICE sy-vline 
WA_CATSPS_STR-TCURR sy-vline 
WA_CATSPS_STR-ERUZU sy-vline 
WA_CATSPS_STR-ERSDA sy-vline 
WA_CATSPS_STR-ERSTM sy-vline 
WA_CATSPS_STR-BEMOT sy-vline 
WA_CATSPS_STR-KOKRS sy-vline 
WA_CATSPS_STR-SKOSTL sy-vline 
WA_CATSPS_STR-FM_SPLIT_FLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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