ABAP Select data from SAP table RLOS_MESSAGE_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLOS_MESSAGE_DATA
*  INTO TABLE @DATA(IT_RLOS_MESSAGE_DATA2).
*--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_RLOS_MESSAGE_DATA INDEX 1 INTO DATA(WA_RLOS_MESSAGE_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLOS_MESSAGE_DATA>-EXTERNAL_ID = 1.
<RLOS_MESSAGE_DATA>-PRODUCTCATEGORY = 1.
<RLOS_MESSAGE_DATA>-PRODUCTIDENTIFIER = 1.
<RLOS_MESSAGE_DATA>-PRODUCTVERSION = 1.
<RLOS_MESSAGE_DATA>-SALES_ORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLOS_MESSAGE_DATA-DISTR_CHANNEL, sy-vline,
  WA_RLOS_MESSAGE_DATA-PURPOSEIDENTIFIER, sy-vline,
  WA_RLOS_MESSAGE_DATA-STARTDATE, sy-vline,
  WA_RLOS_MESSAGE_DATA-ENDDATE, sy-vline,
  WA_RLOS_MESSAGE_DATA-VALIDFROM, sy-vline,
  WA_RLOS_MESSAGE_DATA-VALIDTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLOS_MESSAGE_DATA 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_RLOS_MESSAGE_DATA 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_RLOS_MESSAGE_DATA INTO WA_RLOS_MESSAGE_DATA.


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

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

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLOS_MESSAGE_DATA-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLOS_MESSAGE_DATA-PARTNER.
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_RLOS_MESSAGE_DATA_STR, 
EXTERNAL_ID TYPE STRING,
PRODUCTCATEGORY TYPE STRING,
PRODUCTIDENTIFIER TYPE STRING,
PRODUCTVERSION TYPE STRING,
SALES_ORG TYPE STRING,
DISTR_CHANNEL TYPE STRING,
PURPOSEIDENTIFIER TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
COMMITMENTCAPITAL TYPE STRING,
CONTRACTCURRENCY TYPE STRING,
INTERESTCALCULATIONMETHOD TYPE STRING,
EFFECTIVEYIELDMETHOD TYPE STRING,
DISAGIO TYPE STRING,
DISAGIO_HANDLING TYPE STRING,
EFFECTIVEINTEREST TYPE STRING,
EFFECTIVEINTERESTFREQUENCY TYPE STRING,
INTEREST_HANDLING TYPE STRING,
CHARACTERISTIC1 TYPE STRING,
CHARACTERISTIC2 TYPE STRING,
PAYER TYPE STRING,
PAYER_GUID TYPE STRING,
PAYMENTCODE TYPE STRING,
BANKIBAN TYPE STRING,
BANKID TYPE STRING,
DZLSCH TYPE STRING,
INTEREST TYPE STRING,
AMORTIZATION TYPE STRING,
FEE TYPE STRING,
LENDERPARTY TYPE STRING,
PARTNER TYPE STRING,
PARTNER_GUID TYPE STRING,
PAYMENTCODE TYPE STRING,
BANKIBAN TYPE STRING,
BANKID TYPE STRING,
BORROWERPARTY TYPE STRING,
LOANBROKERPARTY TYPE STRING,
GUARANTORPARTY TYPE STRING,
CLERKPARTY TYPE STRING,
ATTACHMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLOS_MESSAGE_DATA_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_RLOS_MESSAGE_DATA_STR-EXTERNAL_ID sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PRODUCTCATEGORY sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PRODUCTIDENTIFIER sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PRODUCTVERSION sy-vline 
WA_RLOS_MESSAGE_DATA_STR-SALES_ORG sy-vline 
WA_RLOS_MESSAGE_DATA_STR-DISTR_CHANNEL sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PURPOSEIDENTIFIER sy-vline 
WA_RLOS_MESSAGE_DATA_STR-STARTDATE sy-vline 
WA_RLOS_MESSAGE_DATA_STR-ENDDATE sy-vline 
WA_RLOS_MESSAGE_DATA_STR-VALIDFROM sy-vline 
WA_RLOS_MESSAGE_DATA_STR-VALIDTO sy-vline 
WA_RLOS_MESSAGE_DATA_STR-COMMITMENTCAPITAL sy-vline 
WA_RLOS_MESSAGE_DATA_STR-CONTRACTCURRENCY sy-vline 
WA_RLOS_MESSAGE_DATA_STR-INTERESTCALCULATIONMETHOD sy-vline 
WA_RLOS_MESSAGE_DATA_STR-EFFECTIVEYIELDMETHOD sy-vline 
WA_RLOS_MESSAGE_DATA_STR-DISAGIO sy-vline 
WA_RLOS_MESSAGE_DATA_STR-DISAGIO_HANDLING sy-vline 
WA_RLOS_MESSAGE_DATA_STR-EFFECTIVEINTEREST sy-vline 
WA_RLOS_MESSAGE_DATA_STR-EFFECTIVEINTERESTFREQUENCY sy-vline 
WA_RLOS_MESSAGE_DATA_STR-INTEREST_HANDLING sy-vline 
WA_RLOS_MESSAGE_DATA_STR-CHARACTERISTIC1 sy-vline 
WA_RLOS_MESSAGE_DATA_STR-CHARACTERISTIC2 sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PAYER sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PAYER_GUID sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PAYMENTCODE sy-vline 
WA_RLOS_MESSAGE_DATA_STR-BANKIBAN sy-vline 
WA_RLOS_MESSAGE_DATA_STR-BANKID sy-vline 
WA_RLOS_MESSAGE_DATA_STR-DZLSCH sy-vline 
WA_RLOS_MESSAGE_DATA_STR-INTEREST sy-vline 
WA_RLOS_MESSAGE_DATA_STR-AMORTIZATION sy-vline 
WA_RLOS_MESSAGE_DATA_STR-FEE sy-vline 
WA_RLOS_MESSAGE_DATA_STR-LENDERPARTY sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PARTNER sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PARTNER_GUID sy-vline 
WA_RLOS_MESSAGE_DATA_STR-PAYMENTCODE sy-vline 
WA_RLOS_MESSAGE_DATA_STR-BANKIBAN sy-vline 
WA_RLOS_MESSAGE_DATA_STR-BANKID sy-vline 
WA_RLOS_MESSAGE_DATA_STR-BORROWERPARTY sy-vline 
WA_RLOS_MESSAGE_DATA_STR-LOANBROKERPARTY sy-vline 
WA_RLOS_MESSAGE_DATA_STR-GUARANTORPARTY sy-vline 
WA_RLOS_MESSAGE_DATA_STR-CLERKPARTY sy-vline 
WA_RLOS_MESSAGE_DATA_STR-ATTACHMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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