ABAP Select data from SAP table RDEFERRAL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RDEFERRAL 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 RDEFERRAL. 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 RDEFERRAL 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_RDEFERRAL TYPE STANDARD TABLE OF RDEFERRAL,
      WA_RDEFERRAL TYPE RDEFERRAL,
      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: <RDEFERRAL> TYPE RDEFERRAL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RDEFERRAL
*  INTO TABLE @DATA(IT_RDEFERRAL2).
*--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_RDEFERRAL INDEX 1 INTO DATA(WA_RDEFERRAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RDEFERRAL>-IDEFMANUPROC = 1.
<RDEFERRAL>-MDEFREASON = 1.
<RDEFERRAL>-ADEFERR = 1.
<RDEFERRAL>-DDEFKYDTE = 1.
<RDEFERRAL>-PDEFINTRT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RDEFERRAL-MINTDYMT, sy-vline,
  WA_RDEFERRAL-DFRSTDUDTE, sy-vline,
  WA_RDEFERRAL-IULTIDUDTE, sy-vline,
  WA_RDEFERRAL-IINCLDUDTE, sy-vline,
  WA_RDEFERRAL-MNUMRTS, sy-vline,
  WA_RDEFERRAL-MRHYTHM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RDEFERRAL 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_RDEFERRAL 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_RDEFERRAL INTO WA_RDEFERRAL.


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

*Conversion exit ALPHA, internal->external for field MPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RDEFERRAL-MPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RDEFERRAL-MPARTNER.
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_RDEFERRAL_STR, 
IDEFMANUPROC TYPE STRING,
MDEFREASON TYPE STRING,
ADEFERR TYPE STRING,
DDEFKYDTE TYPE STRING,
PDEFINTRT TYPE STRING,
MINTDYMT TYPE STRING,
DFRSTDUDTE TYPE STRING,
IULTIDUDTE TYPE STRING,
IINCLDUDTE TYPE STRING,
MNUMRTS TYPE STRING,
MRHYTHM TYPE STRING,
MWRKDYRL TYPE STRING,
MPUHOLCAL TYPE STRING,
IFREEPAYM TYPE STRING,
MPARTKUNNR TYPE STRING,
MPARTNER TYPE STRING,
MBANKTYPE TYPE STRING,
MPAYMTHD TYPE STRING,
PEFFINTRT TYPE STRING,
MEFFINTMT TYPE STRING,
MNDID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RDEFERRAL_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_RDEFERRAL_STR-IDEFMANUPROC sy-vline 
WA_RDEFERRAL_STR-MDEFREASON sy-vline 
WA_RDEFERRAL_STR-ADEFERR sy-vline 
WA_RDEFERRAL_STR-DDEFKYDTE sy-vline 
WA_RDEFERRAL_STR-PDEFINTRT sy-vline 
WA_RDEFERRAL_STR-MINTDYMT sy-vline 
WA_RDEFERRAL_STR-DFRSTDUDTE sy-vline 
WA_RDEFERRAL_STR-IULTIDUDTE sy-vline 
WA_RDEFERRAL_STR-IINCLDUDTE sy-vline 
WA_RDEFERRAL_STR-MNUMRTS sy-vline 
WA_RDEFERRAL_STR-MRHYTHM sy-vline 
WA_RDEFERRAL_STR-MWRKDYRL sy-vline 
WA_RDEFERRAL_STR-MPUHOLCAL sy-vline 
WA_RDEFERRAL_STR-IFREEPAYM sy-vline 
WA_RDEFERRAL_STR-MPARTKUNNR sy-vline 
WA_RDEFERRAL_STR-MPARTNER sy-vline 
WA_RDEFERRAL_STR-MBANKTYPE sy-vline 
WA_RDEFERRAL_STR-MPAYMTHD sy-vline 
WA_RDEFERRAL_STR-PEFFINTRT sy-vline 
WA_RDEFERRAL_STR-MEFFINTMT sy-vline 
WA_RDEFERRAL_STR-MNDID sy-vline      INTO ld_text SEPARATED BY SPACE.

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