ABAP Select data from SAP table FCOMS_SRULE_CHANGE_DOCUMENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FCOMS_SRULE_CHANGE_DOCUMENT
*  INTO TABLE @DATA(IT_FCOMS_SRULE_CHANGE_DOCUMENT2).
*--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_FCOMS_SRULE_CHANGE_DOCUMENT INDEX 1 INTO DATA(WA_FCOMS_SRULE_CHANGE_DOCUMENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FCOMS_SRULE_CHANGE_DOCUMENT>-OBJECTCLAS = 1.
<FCOMS_SRULE_CHANGE_DOCUMENT>-OBJECTID = 1.
<FCOMS_SRULE_CHANGE_DOCUMENT>-CHANGENR = 1.
<FCOMS_SRULE_CHANGE_DOCUMENT>-TABNAME = 1.
<FCOMS_SRULE_CHANGE_DOCUMENT>-TABKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FCOMS_SRULE_CHANGE_DOCUMENT-FNAME, sy-vline,
  WA_FCOMS_SRULE_CHANGE_DOCUMENT-CHNGIND, sy-vline,
  WA_FCOMS_SRULE_CHANGE_DOCUMENT-FIELDTEXT, sy-vline,
  WA_FCOMS_SRULE_CHANGE_DOCUMENT-UNAME, sy-vline,
  WA_FCOMS_SRULE_CHANGE_DOCUMENT-UDATE, sy-vline,
  WA_FCOMS_SRULE_CHANGE_DOCUMENT-UTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FCOMS_SRULE_CHANGE_DOCUMENT 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_FCOMS_SRULE_CHANGE_DOCUMENT 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_FCOMS_SRULE_CHANGE_DOCUMENT INTO WA_FCOMS_SRULE_CHANGE_DOCUMENT.


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

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_FCOMS_SRULE_CHANGE_DOCUMENT-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOMS_SRULE_CHANGE_DOCUMENT-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit OBART, internal->external for field KONTY
CALL FUNCTION 'CONVERSION_EXIT_OBART_OUTPUT'
  EXPORTING
    input =                      WA_FCOMS_SRULE_CHANGE_DOCUMENT-KONTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOMS_SRULE_CHANGE_DOCUMENT-KONTY.
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_FCOMS_SRULE_CHANGE_DOCUMENT_STR, 
OBJECTCLAS TYPE STRING,
OBJECTID TYPE STRING,
CHANGENR TYPE STRING,
TABNAME TYPE STRING,
TABKEY TYPE STRING,
FNAME TYPE STRING,
CHNGIND TYPE STRING,
FIELDTEXT TYPE STRING,
UNAME TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
CHNGIND_TEXT TYPE STRING,
VALUE_NEW TYPE STRING,
VALUE_OLD TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
LANGU TYPE STRING,
LANGTXT TYPE STRING,
LFDNR TYPE STRING,
EXTNR TYPE STRING,
KONTY TYPE STRING,
EMPGE_TEXT TYPE STRING,
UNAME_FULL_NAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FCOMS_SRULE_CHANGE_DOCUMENT_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_FCOMS_SRULE_CHANGE_DOCUMENT_STR-OBJECTCLAS sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-OBJECTID sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-CHANGENR sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-TABNAME sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-TABKEY sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-FNAME sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-CHNGIND sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-FIELDTEXT sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-UNAME sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-UDATE sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-UTIME sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-CHNGIND_TEXT sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-VALUE_NEW sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-VALUE_OLD sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-DATAB sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-DATBI sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-LANGU sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-LANGTXT sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-LFDNR sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-EXTNR sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-KONTY sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-EMPGE_TEXT sy-vline 
WA_FCOMS_SRULE_CHANGE_DOCUMENT_STR-UNAME_FULL_NAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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