ABAP Select data from SAP table JVBXNPI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JVBXNPI
*  INTO TABLE @DATA(IT_JVBXNPI2).
*--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_JVBXNPI INDEX 1 INTO DATA(WA_JVBXNPI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JVBXNPI>-RCLNT = 1.
<JVBXNPI>-LINE_ID = 1.
<JVBXNPI>-RYEAR = 1.
<JVBXNPI>-POPER = 1.
<JVBXNPI>-RBUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JVBXNPI-INT_TYPE, sy-vline,
  WA_JVBXNPI-VPTNR, sy-vline,
  WA_JVBXNPI-NPIGROUP, sy-vline,
  WA_JVBXNPI-NPIGRUOP, sy-vline,
  WA_JVBXNPI-CIGROUP, sy-vline,
  WA_JVBXNPI-VNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JVBXNPI 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_JVBXNPI 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_JVBXNPI INTO WA_JVBXNPI.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field BTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JVBXNPI-BTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JVBXNPI-BTYPE.
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_JVBXNPI_STR, 
RCLNT TYPE STRING,
LINE_ID TYPE STRING,
RYEAR TYPE STRING,
POPER TYPE STRING,
RBUKRS TYPE STRING,
INT_TYPE TYPE STRING,
VPTNR TYPE STRING,
NPIGROUP TYPE STRING,
NPIGRUOP TYPE STRING,
CIGROUP TYPE STRING,
VNAME TYPE STRING,
ETYPE TYPE STRING,
EGRUP TYPE STRING,
RWCUR TYPE STRING,
RHCUR TYPE STRING,
RKCUR TYPE STRING,
ROCUR TYPE STRING,
RVCUR TYPE STRING,
RBCUR TYPE STRING,
RCCUR TYPE STRING,
RDCUR TYPE STRING,
RECUR TYPE STRING,
RFCUR TYPE STRING,
RGCUR TYPE STRING,
E_R_IND TYPE STRING,
PENCAT TYPE STRING,
BTYPE TYPE STRING,
RECPC TYPE STRING,
STOPPAY TYPE STRING,
PENALTY TYPE STRING,
PAYOUT TYPE STRING,
BEGBALT TYPE STRING,
CURBALT TYPE STRING,
ENDBALT TYPE STRING,
BEGBALL TYPE STRING,
CURBALL TYPE STRING,
ENDBALL TYPE STRING,
BEGBALK TYPE STRING,
CURBALK TYPE STRING,
ENDBALK TYPE STRING,
BEGBALO TYPE STRING,
CURBALO TYPE STRING,
ENDBALO TYPE STRING,
BEGBALV TYPE STRING,
CURBALV TYPE STRING,
ENDBALV TYPE STRING,
BEGBALB TYPE STRING,
CURBALB TYPE STRING,
ENDBALB TYPE STRING,
BEGBALC TYPE STRING,
CURBALC TYPE STRING,
ENDBALC TYPE STRING,
BEGBALD TYPE STRING,
CURBALD TYPE STRING,
ENDBALD TYPE STRING,
BEGBALE TYPE STRING,
CURBALE TYPE STRING,
ENDBALE TYPE STRING,
BEGBALF TYPE STRING,
CURBALF TYPE STRING,
ENDBALF TYPE STRING,
BEGBALG TYPE STRING,
CURBALG TYPE STRING,
ENDBALG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JVBXNPI_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_JVBXNPI_STR-RCLNT sy-vline 
WA_JVBXNPI_STR-LINE_ID sy-vline 
WA_JVBXNPI_STR-RYEAR sy-vline 
WA_JVBXNPI_STR-POPER sy-vline 
WA_JVBXNPI_STR-RBUKRS sy-vline 
WA_JVBXNPI_STR-INT_TYPE sy-vline 
WA_JVBXNPI_STR-VPTNR sy-vline 
WA_JVBXNPI_STR-NPIGROUP sy-vline 
WA_JVBXNPI_STR-NPIGRUOP sy-vline 
WA_JVBXNPI_STR-CIGROUP sy-vline 
WA_JVBXNPI_STR-VNAME sy-vline 
WA_JVBXNPI_STR-ETYPE sy-vline 
WA_JVBXNPI_STR-EGRUP sy-vline 
WA_JVBXNPI_STR-RWCUR sy-vline 
WA_JVBXNPI_STR-RHCUR sy-vline 
WA_JVBXNPI_STR-RKCUR sy-vline 
WA_JVBXNPI_STR-ROCUR sy-vline 
WA_JVBXNPI_STR-RVCUR sy-vline 
WA_JVBXNPI_STR-RBCUR sy-vline 
WA_JVBXNPI_STR-RCCUR sy-vline 
WA_JVBXNPI_STR-RDCUR sy-vline 
WA_JVBXNPI_STR-RECUR sy-vline 
WA_JVBXNPI_STR-RFCUR sy-vline 
WA_JVBXNPI_STR-RGCUR sy-vline 
WA_JVBXNPI_STR-E_R_IND sy-vline 
WA_JVBXNPI_STR-PENCAT sy-vline 
WA_JVBXNPI_STR-BTYPE sy-vline 
WA_JVBXNPI_STR-RECPC sy-vline 
WA_JVBXNPI_STR-STOPPAY sy-vline 
WA_JVBXNPI_STR-PENALTY sy-vline 
WA_JVBXNPI_STR-PAYOUT sy-vline 
WA_JVBXNPI_STR-BEGBALT sy-vline 
WA_JVBXNPI_STR-CURBALT sy-vline 
WA_JVBXNPI_STR-ENDBALT sy-vline 
WA_JVBXNPI_STR-BEGBALL sy-vline 
WA_JVBXNPI_STR-CURBALL sy-vline 
WA_JVBXNPI_STR-ENDBALL sy-vline 
WA_JVBXNPI_STR-BEGBALK sy-vline 
WA_JVBXNPI_STR-CURBALK sy-vline 
WA_JVBXNPI_STR-ENDBALK sy-vline 
WA_JVBXNPI_STR-BEGBALO sy-vline 
WA_JVBXNPI_STR-CURBALO sy-vline 
WA_JVBXNPI_STR-ENDBALO sy-vline 
WA_JVBXNPI_STR-BEGBALV sy-vline 
WA_JVBXNPI_STR-CURBALV sy-vline 
WA_JVBXNPI_STR-ENDBALV sy-vline 
WA_JVBXNPI_STR-BEGBALB sy-vline 
WA_JVBXNPI_STR-CURBALB sy-vline 
WA_JVBXNPI_STR-ENDBALB sy-vline 
WA_JVBXNPI_STR-BEGBALC sy-vline 
WA_JVBXNPI_STR-CURBALC sy-vline 
WA_JVBXNPI_STR-ENDBALC sy-vline 
WA_JVBXNPI_STR-BEGBALD sy-vline 
WA_JVBXNPI_STR-CURBALD sy-vline 
WA_JVBXNPI_STR-ENDBALD sy-vline 
WA_JVBXNPI_STR-BEGBALE sy-vline 
WA_JVBXNPI_STR-CURBALE sy-vline 
WA_JVBXNPI_STR-ENDBALE sy-vline 
WA_JVBXNPI_STR-BEGBALF sy-vline 
WA_JVBXNPI_STR-CURBALF sy-vline 
WA_JVBXNPI_STR-ENDBALF sy-vline 
WA_JVBXNPI_STR-BEGBALG sy-vline 
WA_JVBXNPI_STR-CURBALG sy-vline 
WA_JVBXNPI_STR-ENDBALG sy-vline      INTO ld_text SEPARATED BY SPACE.

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