ABAP Select data from SAP table T8JVN02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T8JVN02 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 T8JVN02. 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 T8JVN02 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_T8JVN02 TYPE STANDARD TABLE OF T8JVN02,
      WA_T8JVN02 TYPE T8JVN02,
      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: <T8JVN02> TYPE T8JVN02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T8JVN02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T8JVN02
  INTO TABLE IT_T8JVN02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T8JVN02
*  INTO TABLE @DATA(IT_T8JVN022).
*--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_T8JVN02 INDEX 1 INTO DATA(WA_T8JVN022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T8JVN02 ASSIGNING <T8JVN02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T8JVN02>-BUKRS = 1.
<T8JVN02>-PARTN = 1.
<T8JVN02>-NPIGROUP = 1.
<T8JVN02>-VNAME = 1.
<T8JVN02>-EGRUP = 1.

ENDLOOP.

LOOP AT IT_T8JVN02 INTO WA_T8JVN02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T8JVN02-ETYPE, sy-vline,
  WA_T8JVN02-RTCUR, sy-vline,
  WA_T8JVN02-RYEAR, sy-vline,
  WA_T8JVN02-POPER, sy-vline,
  WA_T8JVN02-ACCREVC, sy-vline,
  WA_T8JVN02-BEGBAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T8JVN02 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_T8JVN02 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_T8JVN02 INTO WA_T8JVN02.


*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 PARTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8JVN02-PARTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVN02-PARTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8JVN02-VNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVN02-VNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EGRUP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8JVN02-EGRUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVN02-EGRUP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ETYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8JVN02-ETYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVN02-ETYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_T8JVN02-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8JVN02-RYEAR.
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_T8JVN02_STR, 
BUKRS TYPE STRING,
PARTN TYPE STRING,
NPIGROUP TYPE STRING,
VNAME TYPE STRING,
EGRUP TYPE STRING,
ETYPE TYPE STRING,
RTCUR TYPE STRING,
RYEAR TYPE STRING,
POPER TYPE STRING,
ACCREVC TYPE STRING,
BEGBAL TYPE STRING,
NPIEXPC TYPE STRING,
TOTDREXPC TYPE STRING,
TOTOPEXPC TYPE STRING,
PENDREXPC TYPE STRING,
PENOPEXPC TYPE STRING,
EGTOT TYPE STRING,
NPIPAYPER TYPE STRING,
OPERRECPC TYPE STRING,
DRILLRECPC TYPE STRING,
NPITOT TYPE STRING,
NPIPAY TYPE STRING,
VENTOT TYPE STRING,
PENEXPE TYPE STRING,
ACCREVE TYPE STRING,
ACCEXP TYPE STRING,
PENCAT TYPE STRING,
RECPC TYPE STRING,
PENACCEXP TYPE STRING,
PCTEXT TYPE STRING,
ITYPTEXT TYPE STRING,
ITYPREVE TYPE STRING,
POSTING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T8JVN02_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_T8JVN02_STR-BUKRS sy-vline 
WA_T8JVN02_STR-PARTN sy-vline 
WA_T8JVN02_STR-NPIGROUP sy-vline 
WA_T8JVN02_STR-VNAME sy-vline 
WA_T8JVN02_STR-EGRUP sy-vline 
WA_T8JVN02_STR-ETYPE sy-vline 
WA_T8JVN02_STR-RTCUR sy-vline 
WA_T8JVN02_STR-RYEAR sy-vline 
WA_T8JVN02_STR-POPER sy-vline 
WA_T8JVN02_STR-ACCREVC sy-vline 
WA_T8JVN02_STR-BEGBAL sy-vline 
WA_T8JVN02_STR-NPIEXPC sy-vline 
WA_T8JVN02_STR-TOTDREXPC sy-vline 
WA_T8JVN02_STR-TOTOPEXPC sy-vline 
WA_T8JVN02_STR-PENDREXPC sy-vline 
WA_T8JVN02_STR-PENOPEXPC sy-vline 
WA_T8JVN02_STR-EGTOT sy-vline 
WA_T8JVN02_STR-NPIPAYPER sy-vline 
WA_T8JVN02_STR-OPERRECPC sy-vline 
WA_T8JVN02_STR-DRILLRECPC sy-vline 
WA_T8JVN02_STR-NPITOT sy-vline 
WA_T8JVN02_STR-NPIPAY sy-vline 
WA_T8JVN02_STR-VENTOT sy-vline 
WA_T8JVN02_STR-PENEXPE sy-vline 
WA_T8JVN02_STR-ACCREVE sy-vline 
WA_T8JVN02_STR-ACCEXP sy-vline 
WA_T8JVN02_STR-PENCAT sy-vline 
WA_T8JVN02_STR-RECPC sy-vline 
WA_T8JVN02_STR-PENACCEXP sy-vline 
WA_T8JVN02_STR-PCTEXT sy-vline 
WA_T8JVN02_STR-ITYPTEXT sy-vline 
WA_T8JVN02_STR-ITYPREVE sy-vline 
WA_T8JVN02_STR-POSTING sy-vline      INTO ld_text SEPARATED BY SPACE.

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