ABAP Select data from SAP table RN1IDEMPF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1IDEMPF 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 RN1IDEMPF. 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 RN1IDEMPF 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_RN1IDEMPF TYPE STANDARD TABLE OF RN1IDEMPF,
      WA_RN1IDEMPF TYPE RN1IDEMPF,
      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: <RN1IDEMPF> TYPE RN1IDEMPF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1IDEMPF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1IDEMPF
  INTO TABLE IT_RN1IDEMPF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1IDEMPF
*  INTO TABLE @DATA(IT_RN1IDEMPF2).
*--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_RN1IDEMPF INDEX 1 INTO DATA(WA_RN1IDEMPF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1IDEMPF ASSIGNING <RN1IDEMPF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1IDEMPF>-MANDT = 1.
<RN1IDEMPF>-DOKAR = 1.
<RN1IDEMPF>-DOKNR = 1.
<RN1IDEMPF>-DOKVR = 1.
<RN1IDEMPF>-DOKTL = 1.

ENDLOOP.

LOOP AT IT_RN1IDEMPF INTO WA_RN1IDEMPF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1IDEMPF-LFDNR, sy-vline,
  WA_RN1IDEMPF-MAILFLAG, sy-vline,
  WA_RN1IDEMPF-TDDEST, sy-vline,
  WA_RN1IDEMPF-HEMPF, sy-vline,
  WA_RN1IDEMPF-EMPFT, sy-vline,
  WA_RN1IDEMPF-ANRDS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1IDEMPF 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_RN1IDEMPF 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_RN1IDEMPF INTO WA_RN1IDEMPF.


*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 DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1IDEMPF-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1IDEMPF-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SPDEV, internal->external for field TDDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_RN1IDEMPF-TDDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1IDEMPF-TDDEST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field TEXNR
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_RN1IDEMPF-TEXNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1IDEMPF-TEXNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1IDEMPF-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1IDEMPF-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1IDEMPF-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1IDEMPF-ORGID.
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_RN1IDEMPF_STR, 
MANDT TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
LFDNR TYPE STRING,
MAILFLAG TYPE STRING,
TDDEST TYPE STRING,
HEMPF TYPE STRING,
EMPFT TYPE STRING,
ANRDS TYPE STRING,
ANTXT TYPE STRING,
TITEL TYPE STRING,
TTOUT TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
PSTLZ TYPE STRING,
LAND TYPE STRING,
ORT TYPE STRING,
STRAS TYPE STRING,
FAXNR TYPE STRING,
FAXXT TYPE STRING,
TEXNR TYPE STRING,
GPART TYPE STRING,
ORGID TYPE STRING,
VERSD TYPE STRING,
VERSZ TYPE STRING,
VERSA TYPE STRING,
VERSU TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
EMPFA TYPE STRING,
PWEG TYPE STRING,
FWEG TYPE STRING,
EWEG TYPE STRING,
ETEXT TYPE STRING,
ETTXT TYPE STRING,
NEWENTRY TYPE STRING,
TMARK TYPE STRING,
VKZ TYPE STRING,
NAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1IDEMPF_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_RN1IDEMPF_STR-MANDT sy-vline 
WA_RN1IDEMPF_STR-DOKAR sy-vline 
WA_RN1IDEMPF_STR-DOKNR sy-vline 
WA_RN1IDEMPF_STR-DOKVR sy-vline 
WA_RN1IDEMPF_STR-DOKTL sy-vline 
WA_RN1IDEMPF_STR-LFDNR sy-vline 
WA_RN1IDEMPF_STR-MAILFLAG sy-vline 
WA_RN1IDEMPF_STR-TDDEST sy-vline 
WA_RN1IDEMPF_STR-HEMPF sy-vline 
WA_RN1IDEMPF_STR-EMPFT sy-vline 
WA_RN1IDEMPF_STR-ANRDS sy-vline 
WA_RN1IDEMPF_STR-ANTXT sy-vline 
WA_RN1IDEMPF_STR-TITEL sy-vline 
WA_RN1IDEMPF_STR-TTOUT sy-vline 
WA_RN1IDEMPF_STR-NAME1 sy-vline 
WA_RN1IDEMPF_STR-NAME2 sy-vline 
WA_RN1IDEMPF_STR-NAME3 sy-vline 
WA_RN1IDEMPF_STR-PSTLZ sy-vline 
WA_RN1IDEMPF_STR-LAND sy-vline 
WA_RN1IDEMPF_STR-ORT sy-vline 
WA_RN1IDEMPF_STR-STRAS sy-vline 
WA_RN1IDEMPF_STR-FAXNR sy-vline 
WA_RN1IDEMPF_STR-FAXXT sy-vline 
WA_RN1IDEMPF_STR-TEXNR sy-vline 
WA_RN1IDEMPF_STR-GPART sy-vline 
WA_RN1IDEMPF_STR-ORGID sy-vline 
WA_RN1IDEMPF_STR-VERSD sy-vline 
WA_RN1IDEMPF_STR-VERSZ sy-vline 
WA_RN1IDEMPF_STR-VERSA sy-vline 
WA_RN1IDEMPF_STR-VERSU sy-vline 
WA_RN1IDEMPF_STR-ERDAT sy-vline 
WA_RN1IDEMPF_STR-ERUSR sy-vline 
WA_RN1IDEMPF_STR-UPDAT sy-vline 
WA_RN1IDEMPF_STR-UPUSR sy-vline 
WA_RN1IDEMPF_STR-EMPFA sy-vline 
WA_RN1IDEMPF_STR-PWEG sy-vline 
WA_RN1IDEMPF_STR-FWEG sy-vline 
WA_RN1IDEMPF_STR-EWEG sy-vline 
WA_RN1IDEMPF_STR-ETEXT sy-vline 
WA_RN1IDEMPF_STR-ETTXT sy-vline 
WA_RN1IDEMPF_STR-NEWENTRY sy-vline 
WA_RN1IDEMPF_STR-TMARK sy-vline 
WA_RN1IDEMPF_STR-VKZ sy-vline 
WA_RN1IDEMPF_STR-NAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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