ABAP Select data from SAP table RJR2401 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJR2401 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 RJR2401. 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 RJR2401 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_RJR2401 TYPE STANDARD TABLE OF RJR2401,
      WA_RJR2401 TYPE RJR2401,
      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: <RJR2401> TYPE RJR2401.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJR2401.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJR2401
  INTO TABLE IT_RJR2401.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJR2401
*  INTO TABLE @DATA(IT_RJR24012).
*--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_RJR2401 INDEX 1 INTO DATA(WA_RJR24012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJR2401 ASSIGNING <RJR2401>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJR2401>-GUELTIGAB = 1.
<RJR2401>-GUELTIGBIS = 1.
<RJR2401>-VAVARTYP = 1.
<RJR2401>-EINHWUNMNG = 1.
<RJR2401>-ROUTE1 = 1.

ENDLOOP.

LOOP AT IT_RJR2401 INTO WA_RJR2401.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJR2401-MENGE1, sy-vline,
  WA_RJR2401-ROUTE2, sy-vline,
  WA_RJR2401-MENGE2, sy-vline,
  WA_RJR2401-ROUTE3, sy-vline,
  WA_RJR2401-MENGE3, sy-vline,
  WA_RJR2401-ROUTE4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJR2401 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_RJR2401 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_RJR2401 INTO WA_RJR2401.


*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 CUNIT, internal->external for field EINHWUNMNG
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJR2401-EINHWUNMNG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJR2401-EINHWUNMNG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROUTE1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJR2401-ROUTE1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJR2401-ROUTE1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROUTE2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJR2401-ROUTE2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJR2401-ROUTE2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROUTE3
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJR2401-ROUTE3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJR2401-ROUTE3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROUTE4
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJR2401-ROUTE4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJR2401-ROUTE4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROUTE5
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJR2401-ROUTE5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJR2401-ROUTE5.
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_RJR2401_STR, 
GUELTIGAB TYPE STRING,
GUELTIGBIS TYPE STRING,
VAVARTYP TYPE STRING,
EINHWUNMNG TYPE STRING,
ROUTE1 TYPE STRING,
MENGE1 TYPE STRING,
ROUTE2 TYPE STRING,
MENGE2 TYPE STRING,
ROUTE3 TYPE STRING,
MENGE3 TYPE STRING,
ROUTE4 TYPE STRING,
MENGE4 TYPE STRING,
ROUTE5 TYPE STRING,
MENGE5 TYPE STRING,
PICK TYPE STRING,
DBCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJR2401_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_RJR2401_STR-GUELTIGAB sy-vline 
WA_RJR2401_STR-GUELTIGBIS sy-vline 
WA_RJR2401_STR-VAVARTYP sy-vline 
WA_RJR2401_STR-EINHWUNMNG sy-vline 
WA_RJR2401_STR-ROUTE1 sy-vline 
WA_RJR2401_STR-MENGE1 sy-vline 
WA_RJR2401_STR-ROUTE2 sy-vline 
WA_RJR2401_STR-MENGE2 sy-vline 
WA_RJR2401_STR-ROUTE3 sy-vline 
WA_RJR2401_STR-MENGE3 sy-vline 
WA_RJR2401_STR-ROUTE4 sy-vline 
WA_RJR2401_STR-MENGE4 sy-vline 
WA_RJR2401_STR-ROUTE5 sy-vline 
WA_RJR2401_STR-MENGE5 sy-vline 
WA_RJR2401_STR-PICK sy-vline 
WA_RJR2401_STR-DBCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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