ABAP Select data from SAP table T8JVB42 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T8JVB42 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 T8JVB42. 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 T8JVB42 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_T8JVB42 TYPE STANDARD TABLE OF T8JVB42,
      WA_T8JVB42 TYPE T8JVB42,
      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: <T8JVB42> TYPE T8JVB42.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T8JVB42.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T8JVB42
  INTO TABLE IT_T8JVB42.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T8JVB42
*  INTO TABLE @DATA(IT_T8JVB422).
*--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_T8JVB42 INDEX 1 INTO DATA(WA_T8JVB422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T8JVB42 ASSIGNING <T8JVB42>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T8JVB42>-BUKRS = 1.
<T8JVB42>-BELNR = 1.
<T8JVB42>-GJAHR = 1.
<T8JVB42>-BUZEI = 1.
<T8JVB42>-BUZID = 1.

ENDLOOP.

LOOP AT IT_T8JVB42 INTO WA_T8JVB42.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T8JVB42-AUGDT, sy-vline,
  WA_T8JVB42-SGTXT, sy-vline,
  WA_T8JVB42-VGABE, sy-vline,
  WA_T8JVB42-REFDOCNR, sy-vline,
  WA_T8JVB42-ZUONR, sy-vline,
  WA_T8JVB42-MULT_GR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T8JVB42 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_T8JVB42 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_T8JVB42 INTO WA_T8JVB42.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8JVB42-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVB42-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_T8JVB42-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVB42-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFDOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8JVB42-REFDOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVB42-REFDOCNR.
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_T8JVB42_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
BUZID TYPE STRING,
AUGDT TYPE STRING,
SGTXT TYPE STRING,
VGABE TYPE STRING,
REFDOCNR TYPE STRING,
ZUONR TYPE STRING,
MULT_GR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T8JVB42_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_T8JVB42_STR-BUKRS sy-vline 
WA_T8JVB42_STR-BELNR sy-vline 
WA_T8JVB42_STR-GJAHR sy-vline 
WA_T8JVB42_STR-BUZEI sy-vline 
WA_T8JVB42_STR-BUZID sy-vline 
WA_T8JVB42_STR-AUGDT sy-vline 
WA_T8JVB42_STR-SGTXT sy-vline 
WA_T8JVB42_STR-VGABE sy-vline 
WA_T8JVB42_STR-REFDOCNR sy-vline 
WA_T8JVB42_STR-ZUONR sy-vline 
WA_T8JVB42_STR-MULT_GR sy-vline      INTO ld_text SEPARATED BY SPACE.

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