ABAP Select data from SAP table FTEGC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FTEGC
*  INTO TABLE @DATA(IT_FTEGC2).
*--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_FTEGC INDEX 1 INTO DATA(WA_FTEGC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FTEGC>-PERNR = 1.
<FTEGC>-TNDAT = 1.
<FTEGC>-PERSG = 1.
<FTEGC>-PERSK = 1.
<FTEGC>-CTTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FTEGC-ANSVH, sy-vline,
  WA_FTEGC-CAPCS, sy-vline,
  WA_FTEGC-CORPS, sy-vline,
  WA_FTEGC-GRADE, sy-vline,
  WA_FTEGC-PSSTT, sy-vline,
  WA_FTEGC-CATEGORIE1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FTEGC 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_FTEGC 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_FTEGC INTO WA_FTEGC.


*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_FTEGC_STR, 
PERNR TYPE STRING,
TNDAT TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
CTTYP TYPE STRING,
ANSVH TYPE STRING,
CAPCS TYPE STRING,
CORPS TYPE STRING,
GRADE TYPE STRING,
PSSTT TYPE STRING,
CATEGORIE1 TYPE STRING,
CATEGORIE2 TYPE STRING,
MOLGA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FTEGC_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_FTEGC_STR-PERNR sy-vline 
WA_FTEGC_STR-TNDAT sy-vline 
WA_FTEGC_STR-PERSG sy-vline 
WA_FTEGC_STR-PERSK sy-vline 
WA_FTEGC_STR-CTTYP sy-vline 
WA_FTEGC_STR-ANSVH sy-vline 
WA_FTEGC_STR-CAPCS sy-vline 
WA_FTEGC_STR-CORPS sy-vline 
WA_FTEGC_STR-GRADE sy-vline 
WA_FTEGC_STR-PSSTT sy-vline 
WA_FTEGC_STR-CATEGORIE1 sy-vline 
WA_FTEGC_STR-CATEGORIE2 sy-vline 
WA_FTEGC_STR-MOLGA sy-vline      INTO ld_text SEPARATED BY SPACE.

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