ABAP Select data from SAP table VT8J8D 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 VT8J8D 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 VT8J8D. 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 VT8J8D 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_VT8J8D TYPE STANDARD TABLE OF VT8J8D,
      WA_VT8J8D TYPE VT8J8D,
      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: <VT8J8D> TYPE VT8J8D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VT8J8D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VT8J8D
  INTO TABLE IT_VT8J8D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VT8J8D
*  INTO TABLE @DATA(IT_VT8J8D2).
*--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_VT8J8D INDEX 1 INTO DATA(WA_VT8J8D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VT8J8D ASSIGNING <VT8J8D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VT8J8D>-MANDT = 1.
<VT8J8D>-BUKRS = 1.
<VT8J8D>-JOA = 1.
<VT8J8D>-SEQNUM = 1.
<VT8J8D>-PROJ = 1.

ENDLOOP.

LOOP AT IT_VT8J8D INTO WA_VT8J8D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VT8J8D-STEPTYP, sy-vline,
  WA_VT8J8D-XSET, sy-vline,
  WA_VT8J8D-OVRPER, sy-vline,
  WA_VT8J8D-OVRRULE, sy-vline,
  WA_VT8J8D-XWBSFLAG, sy-vline,
  WA_VT8J8D-KZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VT8J8D 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_VT8J8D 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_VT8J8D INTO WA_VT8J8D.


*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 JOA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VT8J8D-JOA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VT8J8D-JOA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEQNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VT8J8D-SEQNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VT8J8D-SEQNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PROJ
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_VT8J8D-PROJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VT8J8D-PROJ.
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_VT8J8D_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
JOA TYPE STRING,
SEQNUM TYPE STRING,
PROJ TYPE STRING,
STEPTYP TYPE STRING,
XSET TYPE STRING,
OVRPER TYPE STRING,
OVRRULE TYPE STRING,
XWBSFLAG TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VT8J8D_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_VT8J8D_STR-MANDT sy-vline 
WA_VT8J8D_STR-BUKRS sy-vline 
WA_VT8J8D_STR-JOA sy-vline 
WA_VT8J8D_STR-SEQNUM sy-vline 
WA_VT8J8D_STR-PROJ sy-vline 
WA_VT8J8D_STR-STEPTYP sy-vline 
WA_VT8J8D_STR-XSET sy-vline 
WA_VT8J8D_STR-OVRPER sy-vline 
WA_VT8J8D_STR-OVRRULE sy-vline 
WA_VT8J8D_STR-XWBSFLAG sy-vline 
WA_VT8J8D_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.