ABAP Select data from SAP table J_3RF_REGINV_K into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RF_REGINV_K 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 J_3RF_REGINV_K. 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 J_3RF_REGINV_K 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_J_3RF_REGINV_K TYPE STANDARD TABLE OF J_3RF_REGINV_K,
      WA_J_3RF_REGINV_K TYPE J_3RF_REGINV_K,
      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: <J_3RF_REGINV_K> TYPE J_3RF_REGINV_K.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RF_REGINV_K.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RF_REGINV_K
  INTO TABLE IT_J_3RF_REGINV_K.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RF_REGINV_K
*  INTO TABLE @DATA(IT_J_3RF_REGINV_K2).
*--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_J_3RF_REGINV_K INDEX 1 INTO DATA(WA_J_3RF_REGINV_K2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RF_REGINV_K ASSIGNING <J_3RF_REGINV_K>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RF_REGINV_K>-MANDT = 1.
<J_3RF_REGINV_K>-BUKRS = 1.
<J_3RF_REGINV_K>-BELNR = 1.
<J_3RF_REGINV_K>-GJAHR = 1.
<J_3RF_REGINV_K>-XBLNR = 1.

ENDLOOP.

LOOP AT IT_J_3RF_REGINV_K INTO WA_J_3RF_REGINV_K.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RF_REGINV_K-BLDAT, sy-vline,
  WA_J_3RF_REGINV_K-BUDAT, sy-vline,
  WA_J_3RF_REGINV_K-LIFNR, sy-vline,
  WA_J_3RF_REGINV_K-NAME1, sy-vline,
  WA_J_3RF_REGINV_K-DMBTR, sy-vline,
  WA_J_3RF_REGINV_K-DMBTR_WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RF_REGINV_K 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_J_3RF_REGINV_K 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_J_3RF_REGINV_K INTO WA_J_3RF_REGINV_K.


*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_J_3RF_REGINV_K-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_K-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_K-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_K-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_K-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_K-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_K-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_K-DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_K-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_K-WRBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_K-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_K-KURSF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR_REV_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_K-BELNR_REV_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_K-BELNR_REV_DOC.
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_J_3RF_REGINV_K_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
XBLNR TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
LIFNR TYPE STRING,
NAME1 TYPE STRING,
DMBTR TYPE STRING,
DMBTR_WAERS TYPE STRING,
WRBTR TYPE STRING,
WRBTR_WAERS TYPE STRING,
FLG_BELNR_ALL TYPE STRING,
KURSF TYPE STRING,
BLDAT_REV TYPE STRING,
BLDAT_REV_DOC TYPE STRING,
BUDAT_REV_DOC TYPE STRING,
BELNR_REV_DOC TYPE STRING,
BLART_REV_DOC TYPE STRING,
XBLNR_REV_DOC TYPE STRING,
STGRD_REV_DOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RF_REGINV_K_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_J_3RF_REGINV_K_STR-MANDT sy-vline 
WA_J_3RF_REGINV_K_STR-BUKRS sy-vline 
WA_J_3RF_REGINV_K_STR-BELNR sy-vline 
WA_J_3RF_REGINV_K_STR-GJAHR sy-vline 
WA_J_3RF_REGINV_K_STR-XBLNR sy-vline 
WA_J_3RF_REGINV_K_STR-BLDAT sy-vline 
WA_J_3RF_REGINV_K_STR-BUDAT sy-vline 
WA_J_3RF_REGINV_K_STR-LIFNR sy-vline 
WA_J_3RF_REGINV_K_STR-NAME1 sy-vline 
WA_J_3RF_REGINV_K_STR-DMBTR sy-vline 
WA_J_3RF_REGINV_K_STR-DMBTR_WAERS sy-vline 
WA_J_3RF_REGINV_K_STR-WRBTR sy-vline 
WA_J_3RF_REGINV_K_STR-WRBTR_WAERS sy-vline 
WA_J_3RF_REGINV_K_STR-FLG_BELNR_ALL sy-vline 
WA_J_3RF_REGINV_K_STR-KURSF sy-vline 
WA_J_3RF_REGINV_K_STR-BLDAT_REV sy-vline 
WA_J_3RF_REGINV_K_STR-BLDAT_REV_DOC sy-vline 
WA_J_3RF_REGINV_K_STR-BUDAT_REV_DOC sy-vline 
WA_J_3RF_REGINV_K_STR-BELNR_REV_DOC sy-vline 
WA_J_3RF_REGINV_K_STR-BLART_REV_DOC sy-vline 
WA_J_3RF_REGINV_K_STR-XBLNR_REV_DOC sy-vline 
WA_J_3RF_REGINV_K_STR-STGRD_REV_DOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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