ABAP Select data from SAP table J_3R0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3R0 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_3R0. 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_3R0 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_3R0 TYPE STANDARD TABLE OF J_3R0,
      WA_J_3R0 TYPE J_3R0,
      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_3R0> TYPE J_3R0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3R0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3R0
  INTO TABLE IT_J_3R0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3R0
*  INTO TABLE @DATA(IT_J_3R02).
*--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_3R0 INDEX 1 INTO DATA(WA_J_3R02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3R0 ASSIGNING <J_3R0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3R0>-MANDT = 1.
<J_3R0>-ZBUKR = 1.
<J_3R0>-UBKON = 1.
<J_3R0>-UBKNT = 1.
<J_3R0>-UBNKL = 1.

ENDLOOP.

LOOP AT IT_J_3R0 INTO WA_J_3R0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3R0-ZBKON, sy-vline,
  WA_J_3R0-ZBNKN, sy-vline,
  WA_J_3R0-ZBNKL, sy-vline,
  WA_J_3R0-UZAWE, sy-vline,
  WA_J_3R0-BKN01, sy-vline,
  WA_J_3R0-BNT01, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3R0 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_3R0 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_3R0 INTO WA_J_3R0.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_J_3R0_STR, 
MANDT TYPE STRING,
ZBUKR TYPE STRING,
UBKON TYPE STRING,
UBKNT TYPE STRING,
UBNKL TYPE STRING,
ZBKON TYPE STRING,
ZBNKN TYPE STRING,
ZBNKL TYPE STRING,
UZAWE TYPE STRING,
BKN01 TYPE STRING,
BNT01 TYPE STRING,
UBN01 TYPE STRING,
BAN01 TYPE STRING,
BKN02 TYPE STRING,
BNT02 TYPE STRING,
UBN02 TYPE STRING,
BAN02 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3R0_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_3R0_STR-MANDT sy-vline 
WA_J_3R0_STR-ZBUKR sy-vline 
WA_J_3R0_STR-UBKON sy-vline 
WA_J_3R0_STR-UBKNT sy-vline 
WA_J_3R0_STR-UBNKL sy-vline 
WA_J_3R0_STR-ZBKON sy-vline 
WA_J_3R0_STR-ZBNKN sy-vline 
WA_J_3R0_STR-ZBNKL sy-vline 
WA_J_3R0_STR-UZAWE sy-vline 
WA_J_3R0_STR-BKN01 sy-vline 
WA_J_3R0_STR-BNT01 sy-vline 
WA_J_3R0_STR-UBN01 sy-vline 
WA_J_3R0_STR-BAN01 sy-vline 
WA_J_3R0_STR-BKN02 sy-vline 
WA_J_3R0_STR-BNT02 sy-vline 
WA_J_3R0_STR-UBN02 sy-vline 
WA_J_3R0_STR-BAN02 sy-vline      INTO ld_text SEPARATED BY SPACE.

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