ABAP Select data from SAP table FDM_RSM_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FDM_RSM_ALV
*  INTO TABLE @DATA(IT_FDM_RSM_ALV2).
*--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_FDM_RSM_ALV INDEX 1 INTO DATA(WA_FDM_RSM_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FDM_RSM_ALV>-ICON = 1.
<FDM_RSM_ALV>-RSM_GUID = 1.
<FDM_RSM_ALV>-CUSTOMER = 1.
<FDM_RSM_ALV>-KUNNR = 1.
<FDM_RSM_ALV>-RSM_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FDM_RSM_ALV-RSM_TIME, sy-vline,
  WA_FDM_RSM_ALV-RSM_REASON_TXT, sy-vline,
  WA_FDM_RSM_ALV-NTS_REASON_TXT, sy-vline,
  WA_FDM_RSM_ALV-RSM_XBYPASS, sy-vline,
  WA_FDM_RSM_ALV-RSM_STATUS, sy-vline,
  WA_FDM_RSM_ALV-CREATED_BY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FDM_RSM_ALV 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_FDM_RSM_ALV 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_FDM_RSM_ALV INTO WA_FDM_RSM_ALV.


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

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

*Conversion exit TSTPS, internal->external for field CREATED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_FDM_RSM_ALV-CREATED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_RSM_ALV-CREATED_AT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field CHANGED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_FDM_RSM_ALV-CHANGED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_RSM_ALV-CHANGED_AT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field FISCAL_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FDM_RSM_ALV-FISCAL_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_RSM_ALV-FISCAL_YEAR.
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_FDM_RSM_ALV_STR, 
ICON TYPE STRING,
RSM_GUID TYPE STRING,
CUSTOMER TYPE STRING,
KUNNR TYPE STRING,
RSM_DATE TYPE STRING,
RSM_TIME TYPE STRING,
RSM_REASON_TXT TYPE STRING,
NTS_REASON_TXT TYPE STRING,
RSM_XBYPASS TYPE STRING,
RSM_STATUS TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_AT TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_AT TYPE STRING,
RSM_LAST_NOTE TYPE STRING,
RSM_STATUS_TXT TYPE STRING,
COMP_CODE TYPE STRING,
INVOICE_NO TYPE STRING,
FISCAL_YEAR TYPE STRING,
DOC_ITEM TYPE STRING,
NO_OF_ATTCH TYPE STRING,
NOTE_TYPE TYPE STRING,
NOTE_TYPE_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FDM_RSM_ALV_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_FDM_RSM_ALV_STR-ICON sy-vline 
WA_FDM_RSM_ALV_STR-RSM_GUID sy-vline 
WA_FDM_RSM_ALV_STR-CUSTOMER sy-vline 
WA_FDM_RSM_ALV_STR-KUNNR sy-vline 
WA_FDM_RSM_ALV_STR-RSM_DATE sy-vline 
WA_FDM_RSM_ALV_STR-RSM_TIME sy-vline 
WA_FDM_RSM_ALV_STR-RSM_REASON_TXT sy-vline 
WA_FDM_RSM_ALV_STR-NTS_REASON_TXT sy-vline 
WA_FDM_RSM_ALV_STR-RSM_XBYPASS sy-vline 
WA_FDM_RSM_ALV_STR-RSM_STATUS sy-vline 
WA_FDM_RSM_ALV_STR-CREATED_BY sy-vline 
WA_FDM_RSM_ALV_STR-CREATED_AT sy-vline 
WA_FDM_RSM_ALV_STR-CHANGED_BY sy-vline 
WA_FDM_RSM_ALV_STR-CHANGED_AT sy-vline 
WA_FDM_RSM_ALV_STR-RSM_LAST_NOTE sy-vline 
WA_FDM_RSM_ALV_STR-RSM_STATUS_TXT sy-vline 
WA_FDM_RSM_ALV_STR-COMP_CODE sy-vline 
WA_FDM_RSM_ALV_STR-INVOICE_NO sy-vline 
WA_FDM_RSM_ALV_STR-FISCAL_YEAR sy-vline 
WA_FDM_RSM_ALV_STR-DOC_ITEM sy-vline 
WA_FDM_RSM_ALV_STR-NO_OF_ATTCH sy-vline 
WA_FDM_RSM_ALV_STR-NOTE_TYPE sy-vline 
WA_FDM_RSM_ALV_STR-NOTE_TYPE_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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