ABAP Select data from SAP table TRANSMISSION_CATALOGUE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRANSMISSION_CATALOGUE
*  INTO TABLE @DATA(IT_TRANSMISSION_CATALOGUE2).
*--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_TRANSMISSION_CATALOGUE INDEX 1 INTO DATA(WA_TRANSMISSION_CATALOGUE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRANSMISSION_CATALOGUE>-CONTROLLER = 1.
<TRANSMISSION_CATALOGUE>-COMPLETE_TRANSMISSION_INDICAT = 1.
<TRANSMISSION_CATALOGUE>-PROVIDER_PROPERTY_VALUATION_L = 1.
<TRANSMISSION_CATALOGUE>-ID = 1.
<TRANSMISSION_CATALOGUE>-CONTROLLER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRANSMISSION_CATALOGUE-SCHEME_ID, sy-vline,
  WA_TRANSMISSION_CATALOGUE-SCHEME_AGENCY_ID, sy-vline,
  WA_TRANSMISSION_CATALOGUE-SCHEME_AGENCY_SCHEME_ID, sy-vline,
  WA_TRANSMISSION_CATALOGUE-SCHEME_AGENCY_SCHEME_AGENCY_ID, sy-vline,
  WA_TRANSMISSION_CATALOGUE-VALUE, sy-vline,
  WA_TRANSMISSION_CATALOGUE-VERSION_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRANSMISSION_CATALOGUE 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_TRANSMISSION_CATALOGUE 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_TRANSMISSION_CATALOGUE INTO WA_TRANSMISSION_CATALOGUE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TRANSMISSION_CATALOGUE_STR, 
CONTROLLER TYPE STRING,
COMPLETE_TRANSMISSION_INDICAT TYPE STRING,
PROVIDER_PROPERTY_VALUATION_L TYPE STRING,
ID TYPE STRING,
CONTROLLER TYPE STRING,
SCHEME_ID TYPE STRING,
SCHEME_AGENCY_ID TYPE STRING,
SCHEME_AGENCY_SCHEME_ID TYPE STRING,
SCHEME_AGENCY_SCHEME_AGENCY_ID TYPE STRING,
VALUE TYPE STRING,
VERSION_ID TYPE STRING,
NAME TYPE STRING,
TYPE_CODE TYPE STRING,
VALIDITY_PERIOD TYPE STRING,
CONTROLLER TYPE STRING,
START_DATE_TIME TYPE STRING,
END_DATE_TIME TYPE STRING,
DURATION TYPE STRING,
PROVIDER_PROPERTY_VALUATION TYPE STRING,
MODEL TYPE STRING,
CONTROLLER TYPE STRING,
PROPERTY_DATA_TYPE_LIST_COMPL TYPE STRING,
PROPERTY_LIST_COMPLETE_TRANSM TYPE STRING,
CATALOGUE_SECTION_TYPE_LIST_C TYPE STRING,
CATALOGUE_SCHEMA_LIST_COMPLET TYPE STRING,
PROPERTY_DEFINITION_CLASS TYPE STRING,
PROPERTY_DATA_TYPE TYPE STRING,
PROPERTY TYPE STRING,
CATALOGUE_ITEM_PROPERTY TYPE STRING,
CATALOGUE_SECTION_TYPE TYPE STRING,
CATALOGUE_SCHEMA TYPE STRING,
CONTENT TYPE STRING,
CONTROLLER TYPE STRING,
CATALOGUE_ITEM_LIST_COMPLETE TYPE STRING,
CATALOGUE_ITEM_RELATIONSHIP_L TYPE STRING,
CATALOGUE_VIEW_LIST_COMPLETE TYPE STRING,
CATALOGUE_SCHEMA_ID TYPE STRING,
CATALOGUE_ITEM TYPE STRING,
CATALOGUE_ITEM_RELATIONSHIP TYPE STRING,
CATALOGUE_VIEW TYPE STRING,
LANGUAGE_CODE TYPE STRING,
CURRENCY_CODE TYPE STRING,
UNIT_CODE TYPE STRING,
ACTION_CODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRANSMISSION_CATALOGUE_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_TRANSMISSION_CATALOGUE_STR-CONTROLLER sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-COMPLETE_TRANSMISSION_INDICAT sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-PROVIDER_PROPERTY_VALUATION_L sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-ID sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CONTROLLER sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-SCHEME_ID sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-SCHEME_AGENCY_ID sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-SCHEME_AGENCY_SCHEME_ID sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-SCHEME_AGENCY_SCHEME_AGENCY_ID sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-VALUE sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-VERSION_ID sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-NAME sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-TYPE_CODE sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-VALIDITY_PERIOD sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CONTROLLER sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-START_DATE_TIME sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-END_DATE_TIME sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-DURATION sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-PROVIDER_PROPERTY_VALUATION sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-MODEL sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CONTROLLER sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-PROPERTY_DATA_TYPE_LIST_COMPL sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-PROPERTY_LIST_COMPLETE_TRANSM sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_SECTION_TYPE_LIST_C sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_SCHEMA_LIST_COMPLET sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-PROPERTY_DEFINITION_CLASS sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-PROPERTY_DATA_TYPE sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-PROPERTY sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_ITEM_PROPERTY sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_SECTION_TYPE sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_SCHEMA sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CONTENT sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CONTROLLER sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_ITEM_LIST_COMPLETE sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_ITEM_RELATIONSHIP_L sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_VIEW_LIST_COMPLETE sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_SCHEMA_ID sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_ITEM sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_ITEM_RELATIONSHIP sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CATALOGUE_VIEW sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-LANGUAGE_CODE sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-CURRENCY_CODE sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-UNIT_CODE sy-vline 
WA_TRANSMISSION_CATALOGUE_STR-ACTION_CODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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