ABAP Select data from SAP table RNWAT_EDI_AUF_BENV2000 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNWAT_EDI_AUF_BENV2000 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 RNWAT_EDI_AUF_BENV2000. 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 RNWAT_EDI_AUF_BENV2000 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_RNWAT_EDI_AUF_BENV2000 TYPE STANDARD TABLE OF RNWAT_EDI_AUF_BENV2000,
      WA_RNWAT_EDI_AUF_BENV2000 TYPE RNWAT_EDI_AUF_BENV2000,
      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: <RNWAT_EDI_AUF_BENV2000> TYPE RNWAT_EDI_AUF_BENV2000.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNWAT_EDI_AUF_BENV2000.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNWAT_EDI_AUF_BENV2000
  INTO TABLE IT_RNWAT_EDI_AUF_BENV2000.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNWAT_EDI_AUF_BENV2000
*  INTO TABLE @DATA(IT_RNWAT_EDI_AUF_BENV20002).
*--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_RNWAT_EDI_AUF_BENV2000 INDEX 1 INTO DATA(WA_RNWAT_EDI_AUF_BENV20002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNWAT_EDI_AUF_BENV2000 ASSIGNING <RNWAT_EDI_AUF_BENV2000>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNWAT_EDI_AUF_BENV2000>-MANDT = 1.
<RNWAT_EDI_AUF_BENV2000>-EINRI = 1.
<RNWAT_EDI_AUF_BENV2000>-FALNR = 1.
<RNWAT_EDI_AUF_BENV2000>-BELNR = 1.
<RNWAT_EDI_AUF_BENV2000>-CODE = 1.

ENDLOOP.

LOOP AT IT_RNWAT_EDI_AUF_BENV2000 INTO WA_RNWAT_EDI_AUF_BENV2000.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNWAT_EDI_AUF_BENV2000-FTXT, sy-vline,
  WA_RNWAT_EDI_AUF_BENV2000-KTXT, sy-vline,
  WA_RNWAT_EDI_AUF_BENV2000-KOSTR, sy-vline,
  WA_RNWAT_EDI_AUF_BENV2000-KOSTR_NAME, sy-vline,
  WA_RNWAT_EDI_AUF_BENV2000-RANGF, sy-vline,
  WA_RNWAT_EDI_AUF_BENV2000-PSTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNWAT_EDI_AUF_BENV2000 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_RNWAT_EDI_AUF_BENV2000 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_RNWAT_EDI_AUF_BENV2000 INTO WA_RNWAT_EDI_AUF_BENV2000.


*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_RNWAT_EDI_AUF_BENV2000-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWAT_EDI_AUF_BENV2000-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWAT_EDI_AUF_BENV2000-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWAT_EDI_AUF_BENV2000-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWAT_EDI_AUF_BENV2000-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWAT_EDI_AUF_BENV2000-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWAT_EDI_AUF_BENV2000-KOSTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWAT_EDI_AUF_BENV2000-KOSTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RANGF, internal->external for field RANGF
CALL FUNCTION 'CONVERSION_EXIT_RANGF_OUTPUT'
  EXPORTING
    input =                      WA_RNWAT_EDI_AUF_BENV2000-RANGF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWAT_EDI_AUF_BENV2000-RANGF.
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_RNWAT_EDI_AUF_BENV2000_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
FALNR TYPE STRING,
BELNR TYPE STRING,
CODE TYPE STRING,
FTXT TYPE STRING,
KTXT TYPE STRING,
KOSTR TYPE STRING,
KOSTR_NAME TYPE STRING,
RANGF TYPE STRING,
PSTAT TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
UEBAB TYPE STRING,
UEBICON TYPE STRING,
VRLNG TYPE STRING,
STORN TYPE STRING,
VCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNWAT_EDI_AUF_BENV2000_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_RNWAT_EDI_AUF_BENV2000_STR-MANDT sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-EINRI sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-FALNR sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-BELNR sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-CODE sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-FTXT sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-KTXT sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-KOSTR sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-KOSTR_NAME sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-RANGF sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-PSTAT sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-BEGDT sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-ENDDT sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-UEBAB sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-UEBICON sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-VRLNG sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-STORN sy-vline 
WA_RNWAT_EDI_AUF_BENV2000_STR-VCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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