ABAP Select data from SAP table TFM16 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TFM16 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 TFM16. 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 TFM16 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_TFM16 TYPE STANDARD TABLE OF TFM16,
      WA_TFM16 TYPE TFM16,
      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: <TFM16> TYPE TFM16.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TFM16.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TFM16
  INTO TABLE IT_TFM16.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TFM16
*  INTO TABLE @DATA(IT_TFM162).
*--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_TFM16 INDEX 1 INTO DATA(WA_TFM162).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TFM16 ASSIGNING <TFM16>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TFM16>-FUNKTID = 1.
<TFM16>-FVERSION = 1.
<TFM16>-FVARIANT = 1.
<TFM16>-INPOUT = 1.
<TFM16>-ENTID = 1.

ENDLOOP.

LOOP AT IT_TFM16 INTO WA_TFM16.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TFM16-EVERSION, sy-vline,
  WA_TFM16-EVARIANT, sy-vline,
  WA_TFM16-OPERTYP, sy-vline,
  WA_TFM16-FSTUSER, sy-vline,
  WA_TFM16-FSTDATE, sy-vline,
  WA_TFM16-FSTTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TFM16 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_TFM16 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_TFM16 INTO WA_TFM16.


*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_TFM16_STR, 
FUNKTID TYPE STRING,
FVERSION TYPE STRING,
FVARIANT TYPE STRING,
INPOUT TYPE STRING,
ENTID TYPE STRING,
EVERSION TYPE STRING,
EVARIANT TYPE STRING,
OPERTYP TYPE STRING,
FSTUSER TYPE STRING,
FSTDATE TYPE STRING,
FSTTIME TYPE STRING,
LSTUSER TYPE STRING,
LSTDATE TYPE STRING,
LSTTIME TYPE STRING,
LOESCHZ TYPE STRING,
OBLIGAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TFM16_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_TFM16_STR-FUNKTID sy-vline 
WA_TFM16_STR-FVERSION sy-vline 
WA_TFM16_STR-FVARIANT sy-vline 
WA_TFM16_STR-INPOUT sy-vline 
WA_TFM16_STR-ENTID sy-vline 
WA_TFM16_STR-EVERSION sy-vline 
WA_TFM16_STR-EVARIANT sy-vline 
WA_TFM16_STR-OPERTYP sy-vline 
WA_TFM16_STR-FSTUSER sy-vline 
WA_TFM16_STR-FSTDATE sy-vline 
WA_TFM16_STR-FSTTIME sy-vline 
WA_TFM16_STR-LSTUSER sy-vline 
WA_TFM16_STR-LSTDATE sy-vline 
WA_TFM16_STR-LSTTIME sy-vline 
WA_TFM16_STR-LOESCHZ sy-vline 
WA_TFM16_STR-OBLIGAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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