ABAP Select data from SAP table J_3RF_HD_REGINV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RF_HD_REGINV 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_HD_REGINV. 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_HD_REGINV 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_HD_REGINV TYPE STANDARD TABLE OF J_3RF_HD_REGINV,
      WA_J_3RF_HD_REGINV TYPE J_3RF_HD_REGINV,
      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_HD_REGINV> TYPE J_3RF_HD_REGINV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RF_HD_REGINV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RF_HD_REGINV
  INTO TABLE IT_J_3RF_HD_REGINV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RF_HD_REGINV
*  INTO TABLE @DATA(IT_J_3RF_HD_REGINV2).
*--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_HD_REGINV INDEX 1 INTO DATA(WA_J_3RF_HD_REGINV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RF_HD_REGINV ASSIGNING <J_3RF_HD_REGINV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RF_HD_REGINV>-GJAHR = 1.
<J_3RF_HD_REGINV>-N_PERIOD = 1.
<J_3RF_HD_REGINV>-T_PERIOD = 1.
<J_3RF_HD_REGINV>-MONAME = 1.
<J_3RF_HD_REGINV>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_J_3RF_HD_REGINV INTO WA_J_3RF_HD_REGINV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RF_HD_REGINV-ADRNR, sy-vline,
  WA_J_3RF_HD_REGINV-STCEG, sy-vline,
  WA_J_3RF_HD_REGINV-STCEG_1, sy-vline,
  WA_J_3RF_HD_REGINV-FULL_NAME, sy-vline,
  WA_J_3RF_HD_REGINV-NAME1, sy-vline,
  WA_J_3RF_HD_REGINV-NAME2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RF_HD_REGINV 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_HD_REGINV 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_HD_REGINV INTO WA_J_3RF_HD_REGINV.


*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 GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_HD_REGINV-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_HD_REGINV-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_HD_REGINV-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_HD_REGINV-ADRNR.
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_HD_REGINV_STR, 
GJAHR TYPE STRING,
N_PERIOD TYPE STRING,
T_PERIOD TYPE STRING,
MONAME TYPE STRING,
BUKRS TYPE STRING,
ADRNR TYPE STRING,
STCEG TYPE STRING,
STCEG_1 TYPE STRING,
FULL_NAME TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
CEO_NAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RF_HD_REGINV_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_HD_REGINV_STR-GJAHR sy-vline 
WA_J_3RF_HD_REGINV_STR-N_PERIOD sy-vline 
WA_J_3RF_HD_REGINV_STR-T_PERIOD sy-vline 
WA_J_3RF_HD_REGINV_STR-MONAME sy-vline 
WA_J_3RF_HD_REGINV_STR-BUKRS sy-vline 
WA_J_3RF_HD_REGINV_STR-ADRNR sy-vline 
WA_J_3RF_HD_REGINV_STR-STCEG sy-vline 
WA_J_3RF_HD_REGINV_STR-STCEG_1 sy-vline 
WA_J_3RF_HD_REGINV_STR-FULL_NAME sy-vline 
WA_J_3RF_HD_REGINV_STR-NAME1 sy-vline 
WA_J_3RF_HD_REGINV_STR-NAME2 sy-vline 
WA_J_3RF_HD_REGINV_STR-NAME3 sy-vline 
WA_J_3RF_HD_REGINV_STR-NAME4 sy-vline 
WA_J_3RF_HD_REGINV_STR-CEO_NAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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