ABAP Select data from SAP table VFAAT_MD_VAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VFAAT_MD_VAL
*  INTO TABLE @DATA(IT_VFAAT_MD_VAL2).
*--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_VFAAT_MD_VAL INDEX 1 INTO DATA(WA_VFAAT_MD_VAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VFAAT_MD_VAL>-CLIENT = 1.
<VFAAT_MD_VAL>-COMP_CODE = 1.
<VFAAT_MD_VAL>-ASSET_NO = 1.
<VFAAT_MD_VAL>-ASSET_SUBNO = 1.
<VFAAT_MD_VAL>-LEDGER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VFAAT_MD_VAL-DEPR_AREA, sy-vline,
  WA_VFAAT_MD_VAL-NEGATIVE_VALUES_ALLOWED, sy-vline,
  WA_VFAAT_MD_VAL-ODEPR_START_DATE, sy-vline,
  WA_VFAAT_MD_VAL-SDEPR_START_DATE, sy-vline,
  WA_VFAAT_MD_VAL-INT_START_DATE, sy-vline,
  WA_VFAAT_MD_VAL-READINESS_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VFAAT_MD_VAL 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_VFAAT_MD_VAL 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_VFAAT_MD_VAL INTO WA_VFAAT_MD_VAL.


*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 ALPHA, internal->external for field ASSET_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VFAAT_MD_VAL-ASSET_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFAAT_MD_VAL-ASSET_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ASSET_SUBNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VFAAT_MD_VAL-ASSET_SUBNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFAAT_MD_VAL-ASSET_SUBNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEDGER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VFAAT_MD_VAL-LEDGER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFAAT_MD_VAL-LEDGER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CHANGEOVER_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_VFAAT_MD_VAL-CHANGEOVER_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFAAT_MD_VAL-CHANGEOVER_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CURRENT_FISCAL_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_VFAAT_MD_VAL-CURRENT_FISCAL_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VFAAT_MD_VAL-CURRENT_FISCAL_YEAR.
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_VFAAT_MD_VAL_STR, 
CLIENT TYPE STRING,
COMP_CODE TYPE STRING,
ASSET_NO TYPE STRING,
ASSET_SUBNO TYPE STRING,
LEDGER TYPE STRING,
DEPR_AREA TYPE STRING,
NEGATIVE_VALUES_ALLOWED TYPE STRING,
ODEPR_START_DATE TYPE STRING,
SDEPR_START_DATE TYPE STRING,
INT_START_DATE TYPE STRING,
READINESS_DATE TYPE STRING,
CHANGEOVER_YEAR TYPE STRING,
CHANGEOVER_PERIOD TYPE STRING,
LVA_AMOUNT_CHECK_TYPE TYPE STRING,
INDEX_REPL_VALUES TYPE STRING,
INDEX_REPL_AGE TYPE STRING,
IGNORE_ERROR_IN_HSL TYPE STRING,
IGNORE_ERROR_IN_KSL TYPE STRING,
IGNORE_ERROR_IN_OSL TYPE STRING,
IGNORE_ERROR_IN_VSL TYPE STRING,
IGNORE_ERROR_IN_BSL TYPE STRING,
IGNORE_ERROR_IN_CSL TYPE STRING,
IGNORE_ERROR_IN_DSL TYPE STRING,
IGNORE_ERROR_IN_ESL TYPE STRING,
IGNORE_ERROR_IN_FSL TYPE STRING,
IGNORE_ERROR_IN_GSL TYPE STRING,
LAST_RETIREMENT_DATE TYPE STRING,
CURRENT_FISCAL_YEAR TYPE STRING,
NUMBER_OF_PERIODS TYPE STRING,
CALCULATION_VIEW_TYPE TYPE STRING,
SDM_STATUS TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VFAAT_MD_VAL_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_VFAAT_MD_VAL_STR-CLIENT sy-vline 
WA_VFAAT_MD_VAL_STR-COMP_CODE sy-vline 
WA_VFAAT_MD_VAL_STR-ASSET_NO sy-vline 
WA_VFAAT_MD_VAL_STR-ASSET_SUBNO sy-vline 
WA_VFAAT_MD_VAL_STR-LEDGER sy-vline 
WA_VFAAT_MD_VAL_STR-DEPR_AREA sy-vline 
WA_VFAAT_MD_VAL_STR-NEGATIVE_VALUES_ALLOWED sy-vline 
WA_VFAAT_MD_VAL_STR-ODEPR_START_DATE sy-vline 
WA_VFAAT_MD_VAL_STR-SDEPR_START_DATE sy-vline 
WA_VFAAT_MD_VAL_STR-INT_START_DATE sy-vline 
WA_VFAAT_MD_VAL_STR-READINESS_DATE sy-vline 
WA_VFAAT_MD_VAL_STR-CHANGEOVER_YEAR sy-vline 
WA_VFAAT_MD_VAL_STR-CHANGEOVER_PERIOD sy-vline 
WA_VFAAT_MD_VAL_STR-LVA_AMOUNT_CHECK_TYPE sy-vline 
WA_VFAAT_MD_VAL_STR-INDEX_REPL_VALUES sy-vline 
WA_VFAAT_MD_VAL_STR-INDEX_REPL_AGE sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_HSL sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_KSL sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_OSL sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_VSL sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_BSL sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_CSL sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_DSL sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_ESL sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_FSL sy-vline 
WA_VFAAT_MD_VAL_STR-IGNORE_ERROR_IN_GSL sy-vline 
WA_VFAAT_MD_VAL_STR-LAST_RETIREMENT_DATE sy-vline 
WA_VFAAT_MD_VAL_STR-CURRENT_FISCAL_YEAR sy-vline 
WA_VFAAT_MD_VAL_STR-NUMBER_OF_PERIODS sy-vline 
WA_VFAAT_MD_VAL_STR-CALCULATION_VIEW_TYPE sy-vline 
WA_VFAAT_MD_VAL_STR-SDM_STATUS sy-vline 
WA_VFAAT_MD_VAL_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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