ABAP Select data from SAP table CRMT_SUBJECT_IX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMT_SUBJECT_IX
*  INTO TABLE @DATA(IT_CRMT_SUBJECT_IX2).
*--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_CRMT_SUBJECT_IX INDEX 1 INTO DATA(WA_CRMT_SUBJECT_IX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMT_SUBJECT_IX>-KATALOGTXT = 1.
<CRMT_SUBJECT_IX>-SCHLAGWORT = 1.
<CRMT_SUBJECT_IX>-GROUPTEXT = 1.
<CRMT_SUBJECT_IX>-KURZTEXT = 1.
<CRMT_SUBJECT_IX>-CODETEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMT_SUBJECT_IX-CATALOG_TYPE, sy-vline,
  WA_CRMT_SUBJECT_IX-DESCRIPTION, sy-vline,
  WA_CRMT_SUBJECT_IX-SELECT, sy-vline,
  WA_CRMT_SUBJECT_IX-CODEPROFILE, sy-vline,
  WA_CRMT_SUBJECT_IX-LISTCODE, sy-vline,
  WA_CRMT_SUBJECT_IX-MODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMT_SUBJECT_IX 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_CRMT_SUBJECT_IX 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_CRMT_SUBJECT_IX INTO WA_CRMT_SUBJECT_IX.


*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 ERMSI, internal->external for field ASP_ID
CALL FUNCTION 'CONVERSION_EXIT_ERMSI_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_SUBJECT_IX-ASP_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_SUBJECT_IX-ASP_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ERMSI, internal->external for field CAT_ID
CALL FUNCTION 'CONVERSION_EXIT_ERMSI_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_SUBJECT_IX-CAT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_SUBJECT_IX-CAT_ID.
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_CRMT_SUBJECT_IX_STR, 
KATALOGTXT TYPE STRING,
SCHLAGWORT TYPE STRING,
GROUPTEXT TYPE STRING,
KURZTEXT TYPE STRING,
CODETEXT TYPE STRING,
CATALOG_TYPE TYPE STRING,
DESCRIPTION TYPE STRING,
SELECT TYPE STRING,
CODEPROFILE TYPE STRING,
LISTCODE TYPE STRING,
MODE TYPE STRING,
KATALOGART TYPE STRING,
CODEGRUPPE TYPE STRING,
CODE TYPE STRING,
DEFECTCLASS TYPE STRING,
QUALITY TYPE STRING,
DEFQUANTITY TYPE STRING,
GUID_HIERARCHY TYPE STRING,
SORT TYPE STRING,
EXT_CODE TYPE STRING,
ASP_ID TYPE STRING,
CAT_ID TYPE STRING,
KATALOG_TYPE TYPE STRING,
SUBJECT_PROFILE TYPE STRING,
PROFILE_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMT_SUBJECT_IX_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_CRMT_SUBJECT_IX_STR-KATALOGTXT sy-vline 
WA_CRMT_SUBJECT_IX_STR-SCHLAGWORT sy-vline 
WA_CRMT_SUBJECT_IX_STR-GROUPTEXT sy-vline 
WA_CRMT_SUBJECT_IX_STR-KURZTEXT sy-vline 
WA_CRMT_SUBJECT_IX_STR-CODETEXT sy-vline 
WA_CRMT_SUBJECT_IX_STR-CATALOG_TYPE sy-vline 
WA_CRMT_SUBJECT_IX_STR-DESCRIPTION sy-vline 
WA_CRMT_SUBJECT_IX_STR-SELECT sy-vline 
WA_CRMT_SUBJECT_IX_STR-CODEPROFILE sy-vline 
WA_CRMT_SUBJECT_IX_STR-LISTCODE sy-vline 
WA_CRMT_SUBJECT_IX_STR-MODE sy-vline 
WA_CRMT_SUBJECT_IX_STR-KATALOGART sy-vline 
WA_CRMT_SUBJECT_IX_STR-CODEGRUPPE sy-vline 
WA_CRMT_SUBJECT_IX_STR-CODE sy-vline 
WA_CRMT_SUBJECT_IX_STR-DEFECTCLASS sy-vline 
WA_CRMT_SUBJECT_IX_STR-QUALITY sy-vline 
WA_CRMT_SUBJECT_IX_STR-DEFQUANTITY sy-vline 
WA_CRMT_SUBJECT_IX_STR-GUID_HIERARCHY sy-vline 
WA_CRMT_SUBJECT_IX_STR-SORT sy-vline 
WA_CRMT_SUBJECT_IX_STR-EXT_CODE sy-vline 
WA_CRMT_SUBJECT_IX_STR-ASP_ID sy-vline 
WA_CRMT_SUBJECT_IX_STR-CAT_ID sy-vline 
WA_CRMT_SUBJECT_IX_STR-KATALOG_TYPE sy-vline 
WA_CRMT_SUBJECT_IX_STR-SUBJECT_PROFILE sy-vline 
WA_CRMT_SUBJECT_IX_STR-PROFILE_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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