ABAP Select data from SAP table VXDD28VOLD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VXDD28VOLD 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 VXDD28VOLD. 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 VXDD28VOLD 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_VXDD28VOLD TYPE STANDARD TABLE OF VXDD28VOLD,
      WA_VXDD28VOLD TYPE VXDD28VOLD,
      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: <VXDD28VOLD> TYPE VXDD28VOLD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VXDD28VOLD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VXDD28VOLD
  INTO TABLE IT_VXDD28VOLD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VXDD28VOLD
*  INTO TABLE @DATA(IT_VXDD28VOLD2).
*--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_VXDD28VOLD INDEX 1 INTO DATA(WA_VXDD28VOLD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VXDD28VOLD ASSIGNING <VXDD28VOLD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VXDD28VOLD>-VRSFLAG = 1.
<VXDD28VOLD>-DDLANGUAGE = 1.
<VXDD28VOLD>-CONDNAME = 1.
<VXDD28VOLD>-POSITION = 1.
<VXDD28VOLD>-TABNAME = 1.

ENDLOOP.

LOOP AT IT_VXDD28VOLD INTO WA_VXDD28VOLD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VXDD28VOLD-FIELDNAME, sy-vline,
  WA_VXDD28VOLD-NEGATION, sy-vline,
  WA_VXDD28VOLD-OPERATOR, sy-vline,
  WA_VXDD28VOLD-CONSTANTS, sy-vline,
  WA_VXDD28VOLD-CONTLINE, sy-vline,
  WA_VXDD28VOLD-AND_OR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VXDD28VOLD 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_VXDD28VOLD 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_VXDD28VOLD INTO WA_VXDD28VOLD.


*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_VXDD28VOLD_STR, 
VRSFLAG TYPE STRING,
DDLANGUAGE TYPE STRING,
CONDNAME TYPE STRING,
POSITION TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
NEGATION TYPE STRING,
OPERATOR TYPE STRING,
CONSTANTS TYPE STRING,
CONTLINE TYPE STRING,
AND_OR TYPE STRING,
OFFSET TYPE STRING,
FLENGTH TYPE STRING,
MCOFIELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VXDD28VOLD_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_VXDD28VOLD_STR-VRSFLAG sy-vline 
WA_VXDD28VOLD_STR-DDLANGUAGE sy-vline 
WA_VXDD28VOLD_STR-CONDNAME sy-vline 
WA_VXDD28VOLD_STR-POSITION sy-vline 
WA_VXDD28VOLD_STR-TABNAME sy-vline 
WA_VXDD28VOLD_STR-FIELDNAME sy-vline 
WA_VXDD28VOLD_STR-NEGATION sy-vline 
WA_VXDD28VOLD_STR-OPERATOR sy-vline 
WA_VXDD28VOLD_STR-CONSTANTS sy-vline 
WA_VXDD28VOLD_STR-CONTLINE sy-vline 
WA_VXDD28VOLD_STR-AND_OR sy-vline 
WA_VXDD28VOLD_STR-OFFSET sy-vline 
WA_VXDD28VOLD_STR-FLENGTH sy-vline 
WA_VXDD28VOLD_STR-MCOFIELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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