ABAP Select data from SAP table RNDBEW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNDBEW
*  INTO TABLE @DATA(IT_RNDBEW2).
*--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_RNDBEW INDEX 1 INTO DATA(WA_RNDBEW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNDBEW>-MANDT = 1.
<RNDBEW>-EINRI = 1.
<RNDBEW>-PATNR = 1.
<RNDBEW>-FALNR = 1.
<RNDBEW>-LFDNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNDBEW-FALAR, sy-vline,
  WA_RNDBEW-BEWTY, sy-vline,
  WA_RNDBEW-BWART, sy-vline,
  WA_RNDBEW-BWGR1, sy-vline,
  WA_RNDBEW-BWGR2, sy-vline,
  WA_RNDBEW-BWIDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNDBEW 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_RNDBEW 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_RNDBEW INTO WA_RNDBEW.


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field NWATAUFART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNDBEW-NWATAUFART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNDBEW-NWATAUFART.
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_RNDBEW_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
PATNR TYPE STRING,
FALNR TYPE STRING,
LFDNR TYPE STRING,
FALAR TYPE STRING,
BEWTY TYPE STRING,
BWART TYPE STRING,
BWGR1 TYPE STRING,
BWGR2 TYPE STRING,
BWIDT TYPE STRING,
BWEDT TYPE STRING,
BWIZT TYPE STRING,
BWEZT TYPE STRING,
PLANB TYPE STRING,
STATB TYPE STRING,
KZTXT TYPE STRING,
LGTXT TYPE STRING,
NOTKZ TYPE STRING,
DAUER TYPE STRING,
ORGAU TYPE STRING,
FACHR TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
ZIMMR TYPE STRING,
ZKURZ TYPE STRING,
BETT TYPE STRING,
BKURZ TYPE STRING,
PLANR TYPE STRING,
TELNR TYPE STRING,
TVKZ TYPE STRING,
BEKAT TYPE STRING,
CLASS TYPE STRING,
RFSRC TYPE STRING,
EXTKH TYPE STRING,
BCODE TYPE STRING,
WKAT TYPE STRING,
DOCW TYPE STRING,
PATW TYPE STRING,
FACHS TYPE STRING,
EZUST TYPE STRING,
ARBUN TYPE STRING,
LFDNR_ABS_END TYPE STRING,
BEWTY_ABS_END TYPE STRING,
BWART_ABS_END TYPE STRING,
BWGR1_ABS_END TYPE STRING,
BWGR2_ABS_END TYPE STRING,
BWIDT_ABS_END TYPE STRING,
BWIZT_ABS_END TYPE STRING,
PLANB_ABS_END TYPE STRING,
ABWGN TYPE STRING,
NWATSSW TYPE STRING,
NWATAUFART TYPE STRING,
SAPS TYPE STRING,
/ISHFR/PAL TYPE STRING,
EXTKH_NAME2 TYPE STRING,
EXTKH_NAME3 TYPE STRING,
NWATEREFCD TYPE STRING,
NWATEREFNO TYPE STRING,
NWATEREFID TYPE STRING,
/ISHFR/RDTYPE TYPE STRING,
/ISHFR/TYDOS TYPE STRING,
/ISHFR/NOOFBEAMS TYPE STRING,
BGTXT TYPE STRING,
BGTXT_ABS_END TYPE STRING,
ORAKB TYPE STRING,
FATXT TYPE STRING,
ORFKB TYPE STRING,
ORPKB TYPE STRING,
BKTXT TYPE STRING,
KHANS TYPE STRING,
PCHARTEXT TYPE STRING,
NWATEREFST_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNDBEW_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_RNDBEW_STR-MANDT sy-vline 
WA_RNDBEW_STR-EINRI sy-vline 
WA_RNDBEW_STR-PATNR sy-vline 
WA_RNDBEW_STR-FALNR sy-vline 
WA_RNDBEW_STR-LFDNR sy-vline 
WA_RNDBEW_STR-FALAR sy-vline 
WA_RNDBEW_STR-BEWTY sy-vline 
WA_RNDBEW_STR-BWART sy-vline 
WA_RNDBEW_STR-BWGR1 sy-vline 
WA_RNDBEW_STR-BWGR2 sy-vline 
WA_RNDBEW_STR-BWIDT sy-vline 
WA_RNDBEW_STR-BWEDT sy-vline 
WA_RNDBEW_STR-BWIZT sy-vline 
WA_RNDBEW_STR-BWEZT sy-vline 
WA_RNDBEW_STR-PLANB sy-vline 
WA_RNDBEW_STR-STATB sy-vline 
WA_RNDBEW_STR-KZTXT sy-vline 
WA_RNDBEW_STR-LGTXT sy-vline 
WA_RNDBEW_STR-NOTKZ sy-vline 
WA_RNDBEW_STR-DAUER sy-vline 
WA_RNDBEW_STR-ORGAU sy-vline 
WA_RNDBEW_STR-FACHR sy-vline 
WA_RNDBEW_STR-ORGFA sy-vline 
WA_RNDBEW_STR-ORGPF sy-vline 
WA_RNDBEW_STR-ZIMMR sy-vline 
WA_RNDBEW_STR-ZKURZ sy-vline 
WA_RNDBEW_STR-BETT sy-vline 
WA_RNDBEW_STR-BKURZ sy-vline 
WA_RNDBEW_STR-PLANR sy-vline 
WA_RNDBEW_STR-TELNR sy-vline 
WA_RNDBEW_STR-TVKZ sy-vline 
WA_RNDBEW_STR-BEKAT sy-vline 
WA_RNDBEW_STR-CLASS sy-vline 
WA_RNDBEW_STR-RFSRC sy-vline 
WA_RNDBEW_STR-EXTKH sy-vline 
WA_RNDBEW_STR-BCODE sy-vline 
WA_RNDBEW_STR-WKAT sy-vline 
WA_RNDBEW_STR-DOCW sy-vline 
WA_RNDBEW_STR-PATW sy-vline 
WA_RNDBEW_STR-FACHS sy-vline 
WA_RNDBEW_STR-EZUST sy-vline 
WA_RNDBEW_STR-ARBUN sy-vline 
WA_RNDBEW_STR-LFDNR_ABS_END sy-vline 
WA_RNDBEW_STR-BEWTY_ABS_END sy-vline 
WA_RNDBEW_STR-BWART_ABS_END sy-vline 
WA_RNDBEW_STR-BWGR1_ABS_END sy-vline 
WA_RNDBEW_STR-BWGR2_ABS_END sy-vline 
WA_RNDBEW_STR-BWIDT_ABS_END sy-vline 
WA_RNDBEW_STR-BWIZT_ABS_END sy-vline 
WA_RNDBEW_STR-PLANB_ABS_END sy-vline 
WA_RNDBEW_STR-ABWGN sy-vline 
WA_RNDBEW_STR-NWATSSW sy-vline 
WA_RNDBEW_STR-NWATAUFART sy-vline 
WA_RNDBEW_STR-SAPS sy-vline 
WA_RNDBEW_STR-/ISHFR/PAL sy-vline 
WA_RNDBEW_STR-EXTKH_NAME2 sy-vline 
WA_RNDBEW_STR-EXTKH_NAME3 sy-vline 
WA_RNDBEW_STR-NWATEREFCD sy-vline 
WA_RNDBEW_STR-NWATEREFNO sy-vline 
WA_RNDBEW_STR-NWATEREFID sy-vline 
WA_RNDBEW_STR-/ISHFR/RDTYPE sy-vline 
WA_RNDBEW_STR-/ISHFR/TYDOS sy-vline 
WA_RNDBEW_STR-/ISHFR/NOOFBEAMS sy-vline 
WA_RNDBEW_STR-BGTXT sy-vline 
WA_RNDBEW_STR-BGTXT_ABS_END sy-vline 
WA_RNDBEW_STR-ORAKB sy-vline 
WA_RNDBEW_STR-FATXT sy-vline 
WA_RNDBEW_STR-ORFKB sy-vline 
WA_RNDBEW_STR-ORPKB sy-vline 
WA_RNDBEW_STR-BKTXT sy-vline 
WA_RNDBEW_STR-KHANS sy-vline 
WA_RNDBEW_STR-PCHARTEXT sy-vline 
WA_RNDBEW_STR-NWATEREFST_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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