ABAP Select data from SAP table TFK2671R_GFN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TFK2671R_GFN 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 TFK2671R_GFN. 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 TFK2671R_GFN 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_TFK2671R_GFN TYPE STANDARD TABLE OF TFK2671R_GFN,
      WA_TFK2671R_GFN TYPE TFK2671R_GFN,
      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: <TFK2671R_GFN> TYPE TFK2671R_GFN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TFK2671R_GFN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TFK2671R_GFN
  INTO TABLE IT_TFK2671R_GFN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TFK2671R_GFN
*  INTO TABLE @DATA(IT_TFK2671R_GFN2).
*--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_TFK2671R_GFN INDEX 1 INTO DATA(WA_TFK2671R_GFN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TFK2671R_GFN ASSIGNING <TFK2671R_GFN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TFK2671R_GFN>-CAAPPLICATIONAREA = 1.
<TFK2671R_GFN>-CACLRFCTNINVCGDOCCHECK = 1.
<TFK2671R_GFN>-TRANSACTIONCURRENCY = 1.
<TFK2671R_GFN>-VALIDITYSTARTDATE = 1.
<TFK2671R_GFN>-CACLRFCTNCASECHKRULE1MINAMOUNT = 1.

ENDLOOP.

LOOP AT IT_TFK2671R_GFN INTO WA_TFK2671R_GFN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TFK2671R_GFN-CACLRFCTNCASECHKRULE1MAXAMOUNT, sy-vline,
  WA_TFK2671R_GFN-CACLRFCTNCASECHKRULE1TEXT, sy-vline,
  WA_TFK2671R_GFN-CACLRFCTNCASECHKRULE2MINAMOUNT, sy-vline,
  WA_TFK2671R_GFN-CACLRFCTNCASECHKRULE2MAXAMOUNT, sy-vline,
  WA_TFK2671R_GFN-CACLRFCTNCASECHKRULE2TEXT, sy-vline,
  WA_TFK2671R_GFN-CACLRFCTNCASECHKRULE3MINAMOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TFK2671R_GFN 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_TFK2671R_GFN 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_TFK2671R_GFN INTO WA_TFK2671R_GFN.


*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_TFK2671R_GFN_STR, 
CAAPPLICATIONAREA TYPE STRING,
CACLRFCTNINVCGDOCCHECK TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
CACLRFCTNCASECHKRULE1MINAMOUNT TYPE STRING,
CACLRFCTNCASECHKRULE1MAXAMOUNT TYPE STRING,
CACLRFCTNCASECHKRULE1TEXT TYPE STRING,
CACLRFCTNCASECHKRULE2MINAMOUNT TYPE STRING,
CACLRFCTNCASECHKRULE2MAXAMOUNT TYPE STRING,
CACLRFCTNCASECHKRULE2TEXT TYPE STRING,
CACLRFCTNCASECHKRULE3MINAMOUNT TYPE STRING,
CACLRFCTNCASECHKRULE3MAXAMOUNT TYPE STRING,
CACLRFCTNCASECHKRULE3TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TFK2671R_GFN_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_TFK2671R_GFN_STR-CAAPPLICATIONAREA sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNINVCGDOCCHECK sy-vline 
WA_TFK2671R_GFN_STR-TRANSACTIONCURRENCY sy-vline 
WA_TFK2671R_GFN_STR-VALIDITYSTARTDATE sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNCASECHKRULE1MINAMOUNT sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNCASECHKRULE1MAXAMOUNT sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNCASECHKRULE1TEXT sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNCASECHKRULE2MINAMOUNT sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNCASECHKRULE2MAXAMOUNT sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNCASECHKRULE2TEXT sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNCASECHKRULE3MINAMOUNT sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNCASECHKRULE3MAXAMOUNT sy-vline 
WA_TFK2671R_GFN_STR-CACLRFCTNCASECHKRULE3TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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