ABAP Select data from SAP table TF655 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TF655 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 TF655. 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 TF655 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_TF655 TYPE STANDARD TABLE OF TF655,
      WA_TF655 TYPE TF655,
      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: <TF655> TYPE TF655.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TF655.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TF655
  INTO TABLE IT_TF655.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TF655
*  INTO TABLE @DATA(IT_TF6552).
*--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_TF655 INDEX 1 INTO DATA(WA_TF6552).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TF655 ASSIGNING <TF655>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TF655>-MANDT = 1.
<TF655>-DIMEN = 1.
<TF655>-ITCLG = 1.
<TF655>-COIAC = 1.
<TF655>-ITINV = 1.

ENDLOOP.

LOOP AT IT_TF655 INTO WA_TF655.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TF655-STINV, sy-vline,
  WA_TF655-SIINV, sy-vline,
  WA_TF655-SPCNT, sy-vline,
  WA_TF655-SVINV, sy-vline,
  WA_TF655-ITEQU, sy-vline,
  WA_TF655-STEQU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TF655 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_TF655 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_TF655 INTO WA_TF655.


*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 BFIMC, internal->external for field ITINV
CALL FUNCTION 'CONVERSION_EXIT_BFIMC_OUTPUT'
  EXPORTING
    input =                      WA_TF655-ITINV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF655-ITINV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit BFIMC, internal->external for field ITEQU
CALL FUNCTION 'CONVERSION_EXIT_BFIMC_OUTPUT'
  EXPORTING
    input =                      WA_TF655-ITEQU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TF655-ITEQU.
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_TF655_STR, 
MANDT TYPE STRING,
DIMEN TYPE STRING,
ITCLG TYPE STRING,
COIAC TYPE STRING,
ITINV TYPE STRING,
STINV TYPE STRING,
SIINV TYPE STRING,
SPCNT TYPE STRING,
SVINV TYPE STRING,
ITEQU TYPE STRING,
STEQU TYPE STRING,
SIEQU TYPE STRING,
SVEQU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TF655_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_TF655_STR-MANDT sy-vline 
WA_TF655_STR-DIMEN sy-vline 
WA_TF655_STR-ITCLG sy-vline 
WA_TF655_STR-COIAC sy-vline 
WA_TF655_STR-ITINV sy-vline 
WA_TF655_STR-STINV sy-vline 
WA_TF655_STR-SIINV sy-vline 
WA_TF655_STR-SPCNT sy-vline 
WA_TF655_STR-SVINV sy-vline 
WA_TF655_STR-ITEQU sy-vline 
WA_TF655_STR-STEQU sy-vline 
WA_TF655_STR-SIEQU sy-vline 
WA_TF655_STR-SVEQU sy-vline      INTO ld_text SEPARATED BY SPACE.

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