ABAP Select data from SAP table CACS_OASET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CACS_OASET
*  INTO TABLE @DATA(IT_CACS_OASET2).
*--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_CACS_OASET INDEX 1 INTO DATA(WA_CACS_OASET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CACS_OASET>-MANDT = 1.
<CACS_OASET>-OAWLID = 1.
<CACS_OASET>-OAGRPID = 1.
<CACS_OASET>-OASETID = 1.
<CACS_OASET>-OSELPARGUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CACS_OASET-TSELPARGUID, sy-vline,
  WA_CACS_OASET-OAPARGUID, sy-vline,
  WA_CACS_OASET-NXTOAINST, sy-vline,
  WA_CACS_OASET-OSELFLG, sy-vline,
  WA_CACS_OASET-TSELFLG, sy-vline,
  WA_CACS_OASET-OASSFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CACS_OASET 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_CACS_OASET 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_CACS_OASET INTO WA_CACS_OASET.


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

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

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

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

*Conversion exit TSTPS, internal->external for field OABBEG
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CACS_OASET-OABBEG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_OASET-OABBEG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field OABEND
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CACS_OASET-OABEND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_OASET-OABEND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field OATBEG
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CACS_OASET-OATBEG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_OASET-OATBEG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field OATEND
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CACS_OASET-OATEND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_OASET-OATEND.
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_CACS_OASET_STR, 
MANDT TYPE STRING,
OAWLID TYPE STRING,
OAGRPID TYPE STRING,
OASETID TYPE STRING,
OSELPARGUID TYPE STRING,
TSELPARGUID TYPE STRING,
OAPARGUID TYPE STRING,
NXTOAINST TYPE STRING,
OSELFLG TYPE STRING,
TSELFLG TYPE STRING,
OASSFLG TYPE STRING,
OABBEG TYPE STRING,
OABEND TYPE STRING,
OATBEG TYPE STRING,
OATEND TYPE STRING,
HASOAINST TYPE STRING,
OASTATUS TYPE STRING,
MCODE TYPE STRING,
DESCR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CACS_OASET_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_CACS_OASET_STR-MANDT sy-vline 
WA_CACS_OASET_STR-OAWLID sy-vline 
WA_CACS_OASET_STR-OAGRPID sy-vline 
WA_CACS_OASET_STR-OASETID sy-vline 
WA_CACS_OASET_STR-OSELPARGUID sy-vline 
WA_CACS_OASET_STR-TSELPARGUID sy-vline 
WA_CACS_OASET_STR-OAPARGUID sy-vline 
WA_CACS_OASET_STR-NXTOAINST sy-vline 
WA_CACS_OASET_STR-OSELFLG sy-vline 
WA_CACS_OASET_STR-TSELFLG sy-vline 
WA_CACS_OASET_STR-OASSFLG sy-vline 
WA_CACS_OASET_STR-OABBEG sy-vline 
WA_CACS_OASET_STR-OABEND sy-vline 
WA_CACS_OASET_STR-OATBEG sy-vline 
WA_CACS_OASET_STR-OATEND sy-vline 
WA_CACS_OASET_STR-HASOAINST sy-vline 
WA_CACS_OASET_STR-OASTATUS sy-vline 
WA_CACS_OASET_STR-MCODE sy-vline 
WA_CACS_OASET_STR-DESCR sy-vline      INTO ld_text SEPARATED BY SPACE.

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