ABAP Select data from SAP table MASSDFIES into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MASSDFIES 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 MASSDFIES. 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 MASSDFIES 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_MASSDFIES TYPE STANDARD TABLE OF MASSDFIES,
      WA_MASSDFIES TYPE MASSDFIES,
      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: <MASSDFIES> TYPE MASSDFIES.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MASSDFIES
*  INTO TABLE @DATA(IT_MASSDFIES2).
*--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_MASSDFIES INDEX 1 INTO DATA(WA_MASSDFIES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MASSDFIES>-TABNAME = 1.
<MASSDFIES>-FIELDNAME = 1.
<MASSDFIES>-LANGU = 1.
<MASSDFIES>-POSITION = 1.
<MASSDFIES>-OFFSET = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MASSDFIES-DOMNAME, sy-vline,
  WA_MASSDFIES-ROLLNAME, sy-vline,
  WA_MASSDFIES-CHECKTABLE, sy-vline,
  WA_MASSDFIES-LENG, sy-vline,
  WA_MASSDFIES-INTLEN, sy-vline,
  WA_MASSDFIES-OUTPUTLEN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MASSDFIES 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_MASSDFIES 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_MASSDFIES INTO WA_MASSDFIES.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MASSDFIES-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MASSDFIES-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_MASSDFIES-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MASSDFIES-DATATYPE.
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_MASSDFIES_STR, 
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
LANGU TYPE STRING,
POSITION TYPE STRING,
OFFSET TYPE STRING,
DOMNAME TYPE STRING,
ROLLNAME TYPE STRING,
CHECKTABLE TYPE STRING,
LENG TYPE STRING,
INTLEN TYPE STRING,
OUTPUTLEN TYPE STRING,
DECIMALS TYPE STRING,
DATATYPE TYPE STRING,
INTTYPE TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
PRECFIELD TYPE STRING,
AUTHORID TYPE STRING,
MEMORYID TYPE STRING,
LOGFLAG TYPE STRING,
MASK TYPE STRING,
MASKLEN TYPE STRING,
CONVEXIT TYPE STRING,
HEADLEN TYPE STRING,
SCRLEN1 TYPE STRING,
SCRLEN2 TYPE STRING,
SCRLEN3 TYPE STRING,
FIELDTEXT TYPE STRING,
REPTEXT TYPE STRING,
SCRTEXT_S TYPE STRING,
SCRTEXT_M TYPE STRING,
SCRTEXT_L TYPE STRING,
KEYFLAG TYPE STRING,
LOWERCASE TYPE STRING,
MAC TYPE STRING,
GENKEY TYPE STRING,
NOFORKEY TYPE STRING,
VALEXI TYPE STRING,
NOAUTHCH TYPE STRING,
SIGN TYPE STRING,
DYNPFLD TYPE STRING,
F4AVAILABL TYPE STRING,
COMPTYPE TYPE STRING,
LFIELDNAME TYPE STRING,
LTRFLDDIS TYPE STRING,
BIDICTRLC TYPE STRING,
OUTPUTSTYLE TYPE STRING,
NOHISTORY TYPE STRING,
AMPMFORMAT TYPE STRING,
TABIX TYPE STRING,
DISPL_ONLY TYPE STRING,
FLAG_FIX_VALUES TYPE STRING,
MARK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MASSDFIES_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_MASSDFIES_STR-TABNAME sy-vline 
WA_MASSDFIES_STR-FIELDNAME sy-vline 
WA_MASSDFIES_STR-LANGU sy-vline 
WA_MASSDFIES_STR-POSITION sy-vline 
WA_MASSDFIES_STR-OFFSET sy-vline 
WA_MASSDFIES_STR-DOMNAME sy-vline 
WA_MASSDFIES_STR-ROLLNAME sy-vline 
WA_MASSDFIES_STR-CHECKTABLE sy-vline 
WA_MASSDFIES_STR-LENG sy-vline 
WA_MASSDFIES_STR-INTLEN sy-vline 
WA_MASSDFIES_STR-OUTPUTLEN sy-vline 
WA_MASSDFIES_STR-DECIMALS sy-vline 
WA_MASSDFIES_STR-DATATYPE sy-vline 
WA_MASSDFIES_STR-INTTYPE sy-vline 
WA_MASSDFIES_STR-REFTABLE sy-vline 
WA_MASSDFIES_STR-REFFIELD sy-vline 
WA_MASSDFIES_STR-PRECFIELD sy-vline 
WA_MASSDFIES_STR-AUTHORID sy-vline 
WA_MASSDFIES_STR-MEMORYID sy-vline 
WA_MASSDFIES_STR-LOGFLAG sy-vline 
WA_MASSDFIES_STR-MASK sy-vline 
WA_MASSDFIES_STR-MASKLEN sy-vline 
WA_MASSDFIES_STR-CONVEXIT sy-vline 
WA_MASSDFIES_STR-HEADLEN sy-vline 
WA_MASSDFIES_STR-SCRLEN1 sy-vline 
WA_MASSDFIES_STR-SCRLEN2 sy-vline 
WA_MASSDFIES_STR-SCRLEN3 sy-vline 
WA_MASSDFIES_STR-FIELDTEXT sy-vline 
WA_MASSDFIES_STR-REPTEXT sy-vline 
WA_MASSDFIES_STR-SCRTEXT_S sy-vline 
WA_MASSDFIES_STR-SCRTEXT_M sy-vline 
WA_MASSDFIES_STR-SCRTEXT_L sy-vline 
WA_MASSDFIES_STR-KEYFLAG sy-vline 
WA_MASSDFIES_STR-LOWERCASE sy-vline 
WA_MASSDFIES_STR-MAC sy-vline 
WA_MASSDFIES_STR-GENKEY sy-vline 
WA_MASSDFIES_STR-NOFORKEY sy-vline 
WA_MASSDFIES_STR-VALEXI sy-vline 
WA_MASSDFIES_STR-NOAUTHCH sy-vline 
WA_MASSDFIES_STR-SIGN sy-vline 
WA_MASSDFIES_STR-DYNPFLD sy-vline 
WA_MASSDFIES_STR-F4AVAILABL sy-vline 
WA_MASSDFIES_STR-COMPTYPE sy-vline 
WA_MASSDFIES_STR-LFIELDNAME sy-vline 
WA_MASSDFIES_STR-LTRFLDDIS sy-vline 
WA_MASSDFIES_STR-BIDICTRLC sy-vline 
WA_MASSDFIES_STR-OUTPUTSTYLE sy-vline 
WA_MASSDFIES_STR-NOHISTORY sy-vline 
WA_MASSDFIES_STR-AMPMFORMAT sy-vline 
WA_MASSDFIES_STR-TABIX sy-vline 
WA_MASSDFIES_STR-DISPL_ONLY sy-vline 
WA_MASSDFIES_STR-FLAG_FIX_VALUES sy-vline 
WA_MASSDFIES_STR-MARK sy-vline      INTO ld_text SEPARATED BY SPACE.

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