ABAP Select data from SAP table RJD31 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 RJD31 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 RJD31. 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 RJD31 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_RJD31 TYPE STANDARD TABLE OF RJD31,
      WA_RJD31 TYPE RJD31,
      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: <RJD31> TYPE RJD31.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJD31.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJD31
  INTO TABLE IT_RJD31.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJD31
*  INTO TABLE @DATA(IT_RJD312).
*--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_RJD31 INDEX 1 INTO DATA(WA_RJD312).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJD31 ASSIGNING <RJD31>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJD31>-DRERZ = 1.
<RJD31>-DRERZ_REF = 1.
<RJD31>-TEXT001 = 1.
<RJD31>-TEXT002 = 1.
<RJD31>-TEXT003 = 1.

ENDLOOP.

LOOP AT IT_RJD31 INTO WA_RJD31.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJD31-TEXT004, sy-vline,
  WA_RJD31-TEXT005, sy-vline,
  WA_RJD31-TEXT006, sy-vline,
  WA_RJD31-TEXT007, sy-vline,
  WA_RJD31-TEXT008, sy-vline,
  WA_RJD31-TEXT009, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJD31 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_RJD31 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_RJD31 INTO WA_RJD31.


*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 DRERZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJD31-DRERZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJD31-DRERZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DRERZ_REF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJD31-DRERZ_REF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJD31-DRERZ_REF.
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_RJD31_STR, 
DRERZ TYPE STRING,
DRERZ_REF TYPE STRING,
TEXT001 TYPE STRING,
TEXT002 TYPE STRING,
TEXT003 TYPE STRING,
TEXT004 TYPE STRING,
TEXT005 TYPE STRING,
TEXT006 TYPE STRING,
TEXT007 TYPE STRING,
TEXT008 TYPE STRING,
TEXT009 TYPE STRING,
TEXT010 TYPE STRING,
TAGE TYPE STRING,
PAGE_COUNT TYPE STRING,
PAGE_MAX TYPE STRING,
TRENNER TYPE STRING,
EINTRAG TYPE STRING,
EINTRAEGE TYPE STRING,
POSTF_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJD31_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_RJD31_STR-DRERZ sy-vline 
WA_RJD31_STR-DRERZ_REF sy-vline 
WA_RJD31_STR-TEXT001 sy-vline 
WA_RJD31_STR-TEXT002 sy-vline 
WA_RJD31_STR-TEXT003 sy-vline 
WA_RJD31_STR-TEXT004 sy-vline 
WA_RJD31_STR-TEXT005 sy-vline 
WA_RJD31_STR-TEXT006 sy-vline 
WA_RJD31_STR-TEXT007 sy-vline 
WA_RJD31_STR-TEXT008 sy-vline 
WA_RJD31_STR-TEXT009 sy-vline 
WA_RJD31_STR-TEXT010 sy-vline 
WA_RJD31_STR-TAGE sy-vline 
WA_RJD31_STR-PAGE_COUNT sy-vline 
WA_RJD31_STR-PAGE_MAX sy-vline 
WA_RJD31_STR-TRENNER sy-vline 
WA_RJD31_STR-EINTRAG sy-vline 
WA_RJD31_STR-EINTRAEGE sy-vline 
WA_RJD31_STR-POSTF_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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