ABAP Select data from SAP table MASSVARTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MASSVARTR
*  INTO TABLE @DATA(IT_MASSVARTR2).
*--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_MASSVARTR INDEX 1 INTO DATA(WA_MASSVARTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MASSVARTR>-MANDT = 1.
<MASSVARTR>-OBJECT = 1.
<MASSVARTR>-VARNAME = 1.
<MASSVARTR>-SEGNR = 1.
<MASSVARTR>-VARTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MASSVARTR-SAPRL, sy-vline,
  WA_MASSVARTR-SEL, sy-vline,
  WA_MASSVARTR-SELVAL, sy-vline,
  WA_MASSVARTR-SKIPSEL, sy-vline,
  WA_MASSVARTR-FIELD, sy-vline,
  WA_MASSVARTR-FIELDVAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MASSVARTR 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_MASSVARTR 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_MASSVARTR INTO WA_MASSVARTR.


*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_MASSVARTR_STR, 
MANDT TYPE STRING,
OBJECT TYPE STRING,
VARNAME TYPE STRING,
SEGNR TYPE STRING,
VARTEXT TYPE STRING,
SAPRL TYPE STRING,
SEL TYPE STRING,
SELVAL TYPE STRING,
SKIPSEL TYPE STRING,
FIELD TYPE STRING,
FIELDVAL TYPE STRING,
NEWSEG TYPE STRING,
RELID TYPE STRING,
SRTFD TYPE STRING,
LOEKZ TYPE STRING,
SPERR TYPE STRING,
AEDAT TYPE STRING,
USERA TYPE STRING,
PGMID TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
CLUSTR TYPE STRING,
CLUSTD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MASSVARTR_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_MASSVARTR_STR-MANDT sy-vline 
WA_MASSVARTR_STR-OBJECT sy-vline 
WA_MASSVARTR_STR-VARNAME sy-vline 
WA_MASSVARTR_STR-SEGNR sy-vline 
WA_MASSVARTR_STR-VARTEXT sy-vline 
WA_MASSVARTR_STR-SAPRL sy-vline 
WA_MASSVARTR_STR-SEL sy-vline 
WA_MASSVARTR_STR-SELVAL sy-vline 
WA_MASSVARTR_STR-SKIPSEL sy-vline 
WA_MASSVARTR_STR-FIELD sy-vline 
WA_MASSVARTR_STR-FIELDVAL sy-vline 
WA_MASSVARTR_STR-NEWSEG sy-vline 
WA_MASSVARTR_STR-RELID sy-vline 
WA_MASSVARTR_STR-SRTFD sy-vline 
WA_MASSVARTR_STR-LOEKZ sy-vline 
WA_MASSVARTR_STR-SPERR sy-vline 
WA_MASSVARTR_STR-AEDAT sy-vline 
WA_MASSVARTR_STR-USERA sy-vline 
WA_MASSVARTR_STR-PGMID sy-vline 
WA_MASSVARTR_STR-BEGDT sy-vline 
WA_MASSVARTR_STR-ENDDT sy-vline 
WA_MASSVARTR_STR-CLUSTR sy-vline 
WA_MASSVARTR_STR-CLUSTD sy-vline      INTO ld_text SEPARATED BY SPACE.

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