ABAP Select data from SAP table RNWCH_EDI_EO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNWCH_EDI_EO
*  INTO TABLE @DATA(IT_RNWCH_EDI_EO2).
*--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_RNWCH_EDI_EO INDEX 1 INTO DATA(WA_RNWCH_EDI_EO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNWCH_EDI_EO>-ORDER_NR = 1.
<RNWCH_EDI_EO>-ORDER_TYPE = 1.
<RNWCH_EDI_EO>-ORDER_TYPE_TXT = 1.
<RNWCH_EDI_EO>-ORDER_CAT = 1.
<RNWCH_EDI_EO>-ORDER_CAT_TXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNWCH_EDI_EO-CANTON, sy-vline,
  WA_RNWCH_EDI_EO-CANTON_TXT, sy-vline,
  WA_RNWCH_EDI_EO-ENTRY_DATE, sy-vline,
  WA_RNWCH_EDI_EO-ENTRY_TIME, sy-vline,
  WA_RNWCH_EDI_EO-ENTRY_STAMP, sy-vline,
  WA_RNWCH_EDI_EO-SENDER_ORDER_NUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNWCH_EDI_EO 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_RNWCH_EDI_EO 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_RNWCH_EDI_EO INTO WA_RNWCH_EDI_EO.


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

*Conversion exit ALPHA, internal->external for field EXT_CLASS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNWCH_EDI_EO-EXT_CLASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNWCH_EDI_EO-EXT_CLASS.
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_RNWCH_EDI_EO_STR, 
ORDER_NR TYPE STRING,
ORDER_TYPE TYPE STRING,
ORDER_TYPE_TXT TYPE STRING,
ORDER_CAT TYPE STRING,
ORDER_CAT_TXT TYPE STRING,
CANTON TYPE STRING,
CANTON_TXT TYPE STRING,
ENTRY_DATE TYPE STRING,
ENTRY_TIME TYPE STRING,
ENTRY_STAMP TYPE STRING,
SENDER_ORDER_NUMBER TYPE STRING,
SENDER_SIGN TYPE STRING,
GAR_REFERENCE_NR TYPE STRING,
DEPARTMENT_PHYSICIAN TYPE STRING,
LAB_ORDER_NUMBER TYPE STRING,
EXT_CASE_NR TYPE STRING,
EXT_CASE_TYPE TYPE STRING,
EXT_CASE_TYPE_TXT TYPE STRING,
EXT_CLASS TYPE STRING,
PERS TYPE STRING,
PSALUTATION TYPE STRING,
PTITEL TYPE STRING,
PNNAME TYPE STRING,
PVNAME TYPE STRING,
PADDR TYPE STRING,
POBOX TYPE STRING,
STREET TYPE STRING,
POSTCODE TYPE STRING,
CITY TYPE STRING,
STATECODE TYPE STRING,
COUNTRYCODE TYPE STRING,
TELNR1 TYPE STRING,
TELNR2 TYPE STRING,
TELNR3 TYPE STRING,
FAXNR1 TYPE STRING,
EMAIL1 TYPE STRING,
URL1 TYPE STRING,
SUBADDR TYPE STRING,
REMARK_INTERNAL TYPE STRING,
REMARK_EXTERNAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNWCH_EDI_EO_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_RNWCH_EDI_EO_STR-ORDER_NR sy-vline 
WA_RNWCH_EDI_EO_STR-ORDER_TYPE sy-vline 
WA_RNWCH_EDI_EO_STR-ORDER_TYPE_TXT sy-vline 
WA_RNWCH_EDI_EO_STR-ORDER_CAT sy-vline 
WA_RNWCH_EDI_EO_STR-ORDER_CAT_TXT sy-vline 
WA_RNWCH_EDI_EO_STR-CANTON sy-vline 
WA_RNWCH_EDI_EO_STR-CANTON_TXT sy-vline 
WA_RNWCH_EDI_EO_STR-ENTRY_DATE sy-vline 
WA_RNWCH_EDI_EO_STR-ENTRY_TIME sy-vline 
WA_RNWCH_EDI_EO_STR-ENTRY_STAMP sy-vline 
WA_RNWCH_EDI_EO_STR-SENDER_ORDER_NUMBER sy-vline 
WA_RNWCH_EDI_EO_STR-SENDER_SIGN sy-vline 
WA_RNWCH_EDI_EO_STR-GAR_REFERENCE_NR sy-vline 
WA_RNWCH_EDI_EO_STR-DEPARTMENT_PHYSICIAN sy-vline 
WA_RNWCH_EDI_EO_STR-LAB_ORDER_NUMBER sy-vline 
WA_RNWCH_EDI_EO_STR-EXT_CASE_NR sy-vline 
WA_RNWCH_EDI_EO_STR-EXT_CASE_TYPE sy-vline 
WA_RNWCH_EDI_EO_STR-EXT_CASE_TYPE_TXT sy-vline 
WA_RNWCH_EDI_EO_STR-EXT_CLASS sy-vline 
WA_RNWCH_EDI_EO_STR-PERS sy-vline 
WA_RNWCH_EDI_EO_STR-PSALUTATION sy-vline 
WA_RNWCH_EDI_EO_STR-PTITEL sy-vline 
WA_RNWCH_EDI_EO_STR-PNNAME sy-vline 
WA_RNWCH_EDI_EO_STR-PVNAME sy-vline 
WA_RNWCH_EDI_EO_STR-PADDR sy-vline 
WA_RNWCH_EDI_EO_STR-POBOX sy-vline 
WA_RNWCH_EDI_EO_STR-STREET sy-vline 
WA_RNWCH_EDI_EO_STR-POSTCODE sy-vline 
WA_RNWCH_EDI_EO_STR-CITY sy-vline 
WA_RNWCH_EDI_EO_STR-STATECODE sy-vline 
WA_RNWCH_EDI_EO_STR-COUNTRYCODE sy-vline 
WA_RNWCH_EDI_EO_STR-TELNR1 sy-vline 
WA_RNWCH_EDI_EO_STR-TELNR2 sy-vline 
WA_RNWCH_EDI_EO_STR-TELNR3 sy-vline 
WA_RNWCH_EDI_EO_STR-FAXNR1 sy-vline 
WA_RNWCH_EDI_EO_STR-EMAIL1 sy-vline 
WA_RNWCH_EDI_EO_STR-URL1 sy-vline 
WA_RNWCH_EDI_EO_STR-SUBADDR sy-vline 
WA_RNWCH_EDI_EO_STR-REMARK_INTERNAL sy-vline 
WA_RNWCH_EDI_EO_STR-REMARK_EXTERNAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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