ABAP Select data from SAP table TMVFP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TMVFP
*  INTO TABLE @DATA(IT_TMVFP2).
*--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_TMVFP INDEX 1 INTO DATA(WA_TMVFP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TMVFP>-MANDT = 1.
<TMVFP>-MTVFP = 1.
<TMVFP>-OBVFP = 1.
<TMVFP>-BESTP = 1.
<TMVFP>-BANFP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TMVFP-RESBP, sy-vline,
  WA_TMVFP-PLAFP, sy-vline,
  WA_TMVFP-EISBP, sy-vline,
  WA_TMVFP-UMLMP, sy-vline,
  WA_TMVFP-VBBDP, sy-vline,
  WA_TMVFP-SKBDP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TMVFP 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_TMVFP 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_TMVFP INTO WA_TMVFP.


*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_TMVFP_STR, 
MANDT TYPE STRING,
MTVFP TYPE STRING,
OBVFP TYPE STRING,
BESTP TYPE STRING,
BANFP TYPE STRING,
RESBP TYPE STRING,
PLAFP TYPE STRING,
EISBP TYPE STRING,
UMLMP TYPE STRING,
VBBDP TYPE STRING,
SKBDP TYPE STRING,
OWBZP TYPE STRING,
VFPSP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TMVFP_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_TMVFP_STR-MANDT sy-vline 
WA_TMVFP_STR-MTVFP sy-vline 
WA_TMVFP_STR-OBVFP sy-vline 
WA_TMVFP_STR-BESTP sy-vline 
WA_TMVFP_STR-BANFP sy-vline 
WA_TMVFP_STR-RESBP sy-vline 
WA_TMVFP_STR-PLAFP sy-vline 
WA_TMVFP_STR-EISBP sy-vline 
WA_TMVFP_STR-UMLMP sy-vline 
WA_TMVFP_STR-VBBDP sy-vline 
WA_TMVFP_STR-SKBDP sy-vline 
WA_TMVFP_STR-OWBZP sy-vline 
WA_TMVFP_STR-VFPSP sy-vline      INTO ld_text SEPARATED BY SPACE.

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