ABAP Select data from SAP table TTE_DT_FIELDCATALOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TTE_DT_FIELDCATALOG
*  INTO TABLE @DATA(IT_TTE_DT_FIELDCATALOG2).
*--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_TTE_DT_FIELDCATALOG INDEX 1 INTO DATA(WA_TTE_DT_FIELDCATALOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TTE_DT_FIELDCATALOG>-BUSINESSPLACE = 1.
<TTE_DT_FIELDCATALOG>-BUSINESSPROCESS = 1.
<TTE_DT_FIELDCATALOG>-BUSINESSTRANSACTION = 1.
<TTE_DT_FIELDCATALOG>-COUNTRY = 1.
<TTE_DT_FIELDCATALOG>-COUNTRYROLE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TTE_DT_FIELDCATALOG-FISCALCODE, sy-vline,
  WA_TTE_DT_FIELDCATALOG-JURISDICTIONCODE, sy-vline,
  WA_TTE_DT_FIELDCATALOG-LEGALENTITY, sy-vline,
  WA_TTE_DT_FIELDCATALOG-ORGUNITTYPE, sy-vline,
  WA_TTE_DT_FIELDCATALOG-ORGUNITVALUE, sy-vline,
  WA_TTE_DT_FIELDCATALOG-OWNPARTNERID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TTE_DT_FIELDCATALOG 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_TTE_DT_FIELDCATALOG 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_TTE_DT_FIELDCATALOG INTO WA_TTE_DT_FIELDCATALOG.


*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_TTE_DT_FIELDCATALOG_STR, 
BUSINESSPLACE TYPE STRING,
BUSINESSPROCESS TYPE STRING,
BUSINESSTRANSACTION TYPE STRING,
COUNTRY TYPE STRING,
COUNTRYROLE TYPE STRING,
FISCALCODE TYPE STRING,
JURISDICTIONCODE TYPE STRING,
LEGALENTITY TYPE STRING,
ORGUNITTYPE TYPE STRING,
ORGUNITVALUE TYPE STRING,
OWNPARTNERID TYPE STRING,
PARTNERBELONGSTOLEGALENTITY TYPE STRING,
PARTNERID TYPE STRING,
PARTNERPROPERTYTYPE TYPE STRING,
PARTNERPROPERTYVALUE TYPE STRING,
PARTNERROLE TYPE STRING,
PARTNERTAXNUMBER TYPE STRING,
PARTNERTAXNUMBERTYPE TYPE STRING,
PARTNERTAXABILITY TYPE STRING,
PRODUCTID TYPE STRING,
PRODUCTORIGIN TYPE STRING,
PRODUCTPROPERTYTYPE TYPE STRING,
PRODUCTPROPERTYVALUE TYPE STRING,
PRODUCTTAXABILITY TYPE STRING,
REGION TYPE STRING,
SPECIALTAXREGION TYPE STRING,
TAXEVENT TYPE STRING,
TAXFROMROLE TYPE STRING,
TAXTARIFFCODE TYPE STRING,
TAXTOROLE TYPE STRING,
TAXABLECOUNTRY TYPE STRING,
TRANSACTIONPROPERTYTYPE TYPE STRING,
TRANSACTIONPROPERTYVALUE TYPE STRING,
TAXABLEREGION TYPE STRING,
PRODUCTTAXGROUP TYPE STRING,
PARTNERTAXGROUP TYPE STRING,
TAXTYPE TYPE STRING,
EXEMPTEDREGIONSTATUS TYPE STRING,
HAS_NEXUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TTE_DT_FIELDCATALOG_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_TTE_DT_FIELDCATALOG_STR-BUSINESSPLACE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-BUSINESSPROCESS sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-BUSINESSTRANSACTION sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-COUNTRY sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-COUNTRYROLE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-FISCALCODE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-JURISDICTIONCODE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-LEGALENTITY sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-ORGUNITTYPE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-ORGUNITVALUE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-OWNPARTNERID sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PARTNERBELONGSTOLEGALENTITY sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PARTNERID sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PARTNERPROPERTYTYPE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PARTNERPROPERTYVALUE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PARTNERROLE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PARTNERTAXNUMBER sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PARTNERTAXNUMBERTYPE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PARTNERTAXABILITY sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PRODUCTID sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PRODUCTORIGIN sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PRODUCTPROPERTYTYPE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PRODUCTPROPERTYVALUE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PRODUCTTAXABILITY sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-REGION sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-SPECIALTAXREGION sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-TAXEVENT sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-TAXFROMROLE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-TAXTARIFFCODE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-TAXTOROLE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-TAXABLECOUNTRY sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-TRANSACTIONPROPERTYTYPE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-TRANSACTIONPROPERTYVALUE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-TAXABLEREGION sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PRODUCTTAXGROUP sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-PARTNERTAXGROUP sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-TAXTYPE sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-EXEMPTEDREGIONSTATUS sy-vline 
WA_TTE_DT_FIELDCATALOG_STR-HAS_NEXUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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