ABAP Select data from SAP table RJLR1001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJLR1001 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 RJLR1001. 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 RJLR1001 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_RJLR1001 TYPE STANDARD TABLE OF RJLR1001,
      WA_RJLR1001 TYPE RJLR1001,
      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: <RJLR1001> TYPE RJLR1001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJLR1001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJLR1001
  INTO TABLE IT_RJLR1001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJLR1001
*  INTO TABLE @DATA(IT_RJLR10012).
*--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_RJLR1001 INDEX 1 INTO DATA(WA_RJLR10012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJLR1001 ASSIGNING <RJLR1001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJLR1001>-JAHR = 1.
<RJLR1001>-TROUTE = 1.
<RJLR1001>-SROUTE = 1.
<RJLR1001>-MON01 = 1.
<RJLR1001>-MON02 = 1.

ENDLOOP.

LOOP AT IT_RJLR1001 INTO WA_RJLR1001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJLR1001-MON03, sy-vline,
  WA_RJLR1001-MON04, sy-vline,
  WA_RJLR1001-MON05, sy-vline,
  WA_RJLR1001-MON06, sy-vline,
  WA_RJLR1001-MON07, sy-vline,
  WA_RJLR1001-MON08, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJLR1001 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_RJLR1001 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_RJLR1001 INTO WA_RJLR1001.


*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 JAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RJLR1001-JAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJLR1001-JAHR.
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_RJLR1001_STR, 
JAHR TYPE STRING,
TROUTE TYPE STRING,
SROUTE TYPE STRING,
MON01 TYPE STRING,
MON02 TYPE STRING,
MON03 TYPE STRING,
MON04 TYPE STRING,
MON05 TYPE STRING,
MON06 TYPE STRING,
MON07 TYPE STRING,
MON08 TYPE STRING,
MON09 TYPE STRING,
MON10 TYPE STRING,
MON11 TYPE STRING,
M01 TYPE STRING,
M02 TYPE STRING,
M03 TYPE STRING,
M04 TYPE STRING,
M05 TYPE STRING,
M06 TYPE STRING,
M07 TYPE STRING,
M08 TYPE STRING,
M09 TYPE STRING,
M10 TYPE STRING,
M11 TYPE STRING,
M12 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJLR1001_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_RJLR1001_STR-JAHR sy-vline 
WA_RJLR1001_STR-TROUTE sy-vline 
WA_RJLR1001_STR-SROUTE sy-vline 
WA_RJLR1001_STR-MON01 sy-vline 
WA_RJLR1001_STR-MON02 sy-vline 
WA_RJLR1001_STR-MON03 sy-vline 
WA_RJLR1001_STR-MON04 sy-vline 
WA_RJLR1001_STR-MON05 sy-vline 
WA_RJLR1001_STR-MON06 sy-vline 
WA_RJLR1001_STR-MON07 sy-vline 
WA_RJLR1001_STR-MON08 sy-vline 
WA_RJLR1001_STR-MON09 sy-vline 
WA_RJLR1001_STR-MON10 sy-vline 
WA_RJLR1001_STR-MON11 sy-vline 
WA_RJLR1001_STR-M01 sy-vline 
WA_RJLR1001_STR-M02 sy-vline 
WA_RJLR1001_STR-M03 sy-vline 
WA_RJLR1001_STR-M04 sy-vline 
WA_RJLR1001_STR-M05 sy-vline 
WA_RJLR1001_STR-M06 sy-vline 
WA_RJLR1001_STR-M07 sy-vline 
WA_RJLR1001_STR-M08 sy-vline 
WA_RJLR1001_STR-M09 sy-vline 
WA_RJLR1001_STR-M10 sy-vline 
WA_RJLR1001_STR-M11 sy-vline 
WA_RJLR1001_STR-M12 sy-vline      INTO ld_text SEPARATED BY SPACE.

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