ABAP Select data from SAP table COMM_SCEKB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COMM_SCEKB
*  INTO TABLE @DATA(IT_COMM_SCEKB2).
*--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_COMM_SCEKB INDEX 1 INTO DATA(WA_COMM_SCEKB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COMM_SCEKB>-MANDT = 1.
<COMM_SCEKB>-KBID = 1.
<COMM_SCEKB>-LOGSYS = 1.
<COMM_SCEKB>-KBOBJNAME = 1.
<COMM_SCEKB>-VERSION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COMM_SCEKB-BUILD, sy-vline,
  WA_COMM_SCEKB-FROMDATE, sy-vline,
  WA_COMM_SCEKB-CREATOR, sy-vline,
  WA_COMM_SCEKB-CREADATE, sy-vline,
  WA_COMM_SCEKB-CHANGER, sy-vline,
  WA_COMM_SCEKB-CHANGEDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COMM_SCEKB 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_COMM_SCEKB 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_COMM_SCEKB INTO WA_COMM_SCEKB.


*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 ISOLA, internal->external for field LANG_DOWN
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_COMM_SCEKB-LANG_DOWN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMM_SCEKB-LANG_DOWN.
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_COMM_SCEKB_STR, 
MANDT TYPE STRING,
KBID TYPE STRING,
LOGSYS TYPE STRING,
KBOBJNAME TYPE STRING,
VERSION TYPE STRING,
BUILD TYPE STRING,
FROMDATE TYPE STRING,
CREATOR TYPE STRING,
CREADATE TYPE STRING,
CHANGER TYPE STRING,
CHANGEDATE TYPE STRING,
LANG_DOWN TYPE STRING,
KLART_DOWN TYPE STRING,
CLASSICDEP TYPE STRING,
ACTIONFLAG TYPE STRING,
STATUSID TYPE STRING,
TODATE TYPE STRING,
ORGID TYPE STRING,
KB_USAGE TYPE STRING,
KB_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COMM_SCEKB_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_COMM_SCEKB_STR-MANDT sy-vline 
WA_COMM_SCEKB_STR-KBID sy-vline 
WA_COMM_SCEKB_STR-LOGSYS sy-vline 
WA_COMM_SCEKB_STR-KBOBJNAME sy-vline 
WA_COMM_SCEKB_STR-VERSION sy-vline 
WA_COMM_SCEKB_STR-BUILD sy-vline 
WA_COMM_SCEKB_STR-FROMDATE sy-vline 
WA_COMM_SCEKB_STR-CREATOR sy-vline 
WA_COMM_SCEKB_STR-CREADATE sy-vline 
WA_COMM_SCEKB_STR-CHANGER sy-vline 
WA_COMM_SCEKB_STR-CHANGEDATE sy-vline 
WA_COMM_SCEKB_STR-LANG_DOWN sy-vline 
WA_COMM_SCEKB_STR-KLART_DOWN sy-vline 
WA_COMM_SCEKB_STR-CLASSICDEP sy-vline 
WA_COMM_SCEKB_STR-ACTIONFLAG sy-vline 
WA_COMM_SCEKB_STR-STATUSID sy-vline 
WA_COMM_SCEKB_STR-TODATE sy-vline 
WA_COMM_SCEKB_STR-ORGID sy-vline 
WA_COMM_SCEKB_STR-KB_USAGE sy-vline 
WA_COMM_SCEKB_STR-KB_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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