ABAP Select data from SAP table DD27VVT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DD27VVT 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 DD27VVT. 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 DD27VVT 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_DD27VVT TYPE STANDARD TABLE OF DD27VVT,
      WA_DD27VVT TYPE DD27VVT,
      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: <DD27VVT> TYPE DD27VVT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DD27VVT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DD27VVT
  INTO TABLE IT_DD27VVT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DD27VVT
*  INTO TABLE @DATA(IT_DD27VVT2).
*--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_DD27VVT INDEX 1 INTO DATA(WA_DD27VVT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DD27VVT ASSIGNING <DD27VVT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DD27VVT>-VIEWNAME = 1.
<DD27VVT>-AS4LOCAL = 1.
<DD27VVT>-OBJPOS = 1.
<DD27VVT>-AS4VERS = 1.
<DD27VVT>-AGGTYPE = 1.

ENDLOOP.

LOOP AT IT_DD27VVT INTO WA_DD27VVT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DD27VVT-VIEWFIELD, sy-vline,
  WA_DD27VVT-TABNAME, sy-vline,
  WA_DD27VVT-FIELDNAME, sy-vline,
  WA_DD27VVT-KEYFLAG, sy-vline,
  WA_DD27VVT-ROLLNAME, sy-vline,
  WA_DD27VVT-ROLLCHANGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DD27VVT 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_DD27VVT 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_DD27VVT INTO WA_DD27VVT.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DD27VVT-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD27VVT-DATATYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field DDLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DD27VVT-DDLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD27VVT-DDLANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field MASTERLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DD27VVT-MASTERLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD27VVT-MASTERLANG.
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_DD27VVT_STR, 
VIEWNAME TYPE STRING,
AS4LOCAL TYPE STRING,
OBJPOS TYPE STRING,
AS4VERS TYPE STRING,
AGGTYPE TYPE STRING,
VIEWFIELD TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
KEYFLAG TYPE STRING,
ROLLNAME TYPE STRING,
ROLLCHANGE TYPE STRING,
DOMNAME TYPE STRING,
ROUTPUTLEN TYPE STRING,
MEMORYID TYPE STRING,
LOGFLAG TYPE STRING,
HEADLEN TYPE STRING,
SCRLEN1 TYPE STRING,
SCRLEN2 TYPE STRING,
SCRLEN3 TYPE STRING,
ACTFLAG TYPE STRING,
LENG TYPE STRING,
DATATYPE TYPE STRING,
DECIMALS TYPE STRING,
LOWERCASE TYPE STRING,
SIGNFLAG TYPE STRING,
LANGFLAG TYPE STRING,
VALEXI TYPE STRING,
ENTITYTAB TYPE STRING,
CONVEXIT TYPE STRING,
MASK TYPE STRING,
MASKLEN TYPE STRING,
DDTEXT TYPE STRING,
AS4USER TYPE STRING,
AS4DATE TYPE STRING,
AS4TIME TYPE STRING,
ROOTTAB TYPE STRING,
VIEWCLASS TYPE STRING,
AUTHCLASS TYPE STRING,
DDLANGUAGE TYPE STRING,
MASTERLANG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DD27VVT_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_DD27VVT_STR-VIEWNAME sy-vline 
WA_DD27VVT_STR-AS4LOCAL sy-vline 
WA_DD27VVT_STR-OBJPOS sy-vline 
WA_DD27VVT_STR-AS4VERS sy-vline 
WA_DD27VVT_STR-AGGTYPE sy-vline 
WA_DD27VVT_STR-VIEWFIELD sy-vline 
WA_DD27VVT_STR-TABNAME sy-vline 
WA_DD27VVT_STR-FIELDNAME sy-vline 
WA_DD27VVT_STR-KEYFLAG sy-vline 
WA_DD27VVT_STR-ROLLNAME sy-vline 
WA_DD27VVT_STR-ROLLCHANGE sy-vline 
WA_DD27VVT_STR-DOMNAME sy-vline 
WA_DD27VVT_STR-ROUTPUTLEN sy-vline 
WA_DD27VVT_STR-MEMORYID sy-vline 
WA_DD27VVT_STR-LOGFLAG sy-vline 
WA_DD27VVT_STR-HEADLEN sy-vline 
WA_DD27VVT_STR-SCRLEN1 sy-vline 
WA_DD27VVT_STR-SCRLEN2 sy-vline 
WA_DD27VVT_STR-SCRLEN3 sy-vline 
WA_DD27VVT_STR-ACTFLAG sy-vline 
WA_DD27VVT_STR-LENG sy-vline 
WA_DD27VVT_STR-DATATYPE sy-vline 
WA_DD27VVT_STR-DECIMALS sy-vline 
WA_DD27VVT_STR-LOWERCASE sy-vline 
WA_DD27VVT_STR-SIGNFLAG sy-vline 
WA_DD27VVT_STR-LANGFLAG sy-vline 
WA_DD27VVT_STR-VALEXI sy-vline 
WA_DD27VVT_STR-ENTITYTAB sy-vline 
WA_DD27VVT_STR-CONVEXIT sy-vline 
WA_DD27VVT_STR-MASK sy-vline 
WA_DD27VVT_STR-MASKLEN sy-vline 
WA_DD27VVT_STR-DDTEXT sy-vline 
WA_DD27VVT_STR-AS4USER sy-vline 
WA_DD27VVT_STR-AS4DATE sy-vline 
WA_DD27VVT_STR-AS4TIME sy-vline 
WA_DD27VVT_STR-ROOTTAB sy-vline 
WA_DD27VVT_STR-VIEWCLASS sy-vline 
WA_DD27VVT_STR-AUTHCLASS sy-vline 
WA_DD27VVT_STR-DDLANGUAGE sy-vline 
WA_DD27VVT_STR-MASTERLANG sy-vline      INTO ld_text SEPARATED BY SPACE.

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