ABAP Select data from SAP table RCUKB into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCUKB 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 RCUKB. 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 RCUKB 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_RCUKB TYPE STANDARD TABLE OF RCUKB,
      WA_RCUKB TYPE RCUKB,
      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: <RCUKB> TYPE RCUKB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCUKB
*  INTO TABLE @DATA(IT_RCUKB2).
*--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_RCUKB INDEX 1 INTO DATA(WA_RCUKB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCUKB>-MANDT = 1.
<RCUKB>-KBOBJNAME = 1.
<RCUKB>-NEWKBNAME = 1.
<RCUKB>-KBOBJDESCR = 1.
<RCUKB>-CUCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCUKB-KBSTATUS, sy-vline,
  WA_RCUKB-KBSTATTXT, sy-vline,
  WA_RCUKB-KBGROUP, sy-vline,
  WA_RCUKB-KBGROUPTXT, sy-vline,
  WA_RCUKB-AUTHORIZE, sy-vline,
  WA_RCUKB-CREATOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCUKB 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_RCUKB 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_RCUKB INTO WA_RCUKB.


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

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

*Conversion exit MATN1, internal->external for field MATNAME
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RCUKB-MATNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCUKB-MATNAME.
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_RCUKB_STR, 
MANDT TYPE STRING,
KBOBJNAME TYPE STRING,
NEWKBNAME TYPE STRING,
KBOBJDESCR TYPE STRING,
CUCOUNT TYPE STRING,
KBSTATUS TYPE STRING,
KBSTATTXT TYPE STRING,
KBGROUP TYPE STRING,
KBGROUPTXT TYPE STRING,
AUTHORIZE TYPE STRING,
CREATOR TYPE STRING,
CREADATE TYPE STRING,
CHANGER TYPE STRING,
CHANGEDATE TYPE STRING,
ECMNR TYPE STRING,
FROMDATE TYPE STRING,
SEARCHDATE TYPE STRING,
DELFLAG TYPE STRING,
LANGUAGEID TYPE STRING,
DESCRIPT TYPE STRING,
PROFNAME TYPE STRING,
PROFDESCR TYPE STRING,
CLASS_FLAG TYPE STRING,
KMAT_FLAG TYPE STRING,
CLASSTYPE TYPE STRING,
MATNAME TYPE STRING,
CLASSNAME TYPE STRING,
UINAME TYPE STRING,
TASKNAME TYPE STRING,
TASKDESCR TYPE STRING,
EVENTNAME TYPE STRING,
EVENTDESCR TYPE STRING,
FROMLINE TYPE STRING,
TOLINE TYPE STRING,
TOTALLINES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCUKB_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_RCUKB_STR-MANDT sy-vline 
WA_RCUKB_STR-KBOBJNAME sy-vline 
WA_RCUKB_STR-NEWKBNAME sy-vline 
WA_RCUKB_STR-KBOBJDESCR sy-vline 
WA_RCUKB_STR-CUCOUNT sy-vline 
WA_RCUKB_STR-KBSTATUS sy-vline 
WA_RCUKB_STR-KBSTATTXT sy-vline 
WA_RCUKB_STR-KBGROUP sy-vline 
WA_RCUKB_STR-KBGROUPTXT sy-vline 
WA_RCUKB_STR-AUTHORIZE sy-vline 
WA_RCUKB_STR-CREATOR sy-vline 
WA_RCUKB_STR-CREADATE sy-vline 
WA_RCUKB_STR-CHANGER sy-vline 
WA_RCUKB_STR-CHANGEDATE sy-vline 
WA_RCUKB_STR-ECMNR sy-vline 
WA_RCUKB_STR-FROMDATE sy-vline 
WA_RCUKB_STR-SEARCHDATE sy-vline 
WA_RCUKB_STR-DELFLAG sy-vline 
WA_RCUKB_STR-LANGUAGEID sy-vline 
WA_RCUKB_STR-DESCRIPT sy-vline 
WA_RCUKB_STR-PROFNAME sy-vline 
WA_RCUKB_STR-PROFDESCR sy-vline 
WA_RCUKB_STR-CLASS_FLAG sy-vline 
WA_RCUKB_STR-KMAT_FLAG sy-vline 
WA_RCUKB_STR-CLASSTYPE sy-vline 
WA_RCUKB_STR-MATNAME sy-vline 
WA_RCUKB_STR-CLASSNAME sy-vline 
WA_RCUKB_STR-UINAME sy-vline 
WA_RCUKB_STR-TASKNAME sy-vline 
WA_RCUKB_STR-TASKDESCR sy-vline 
WA_RCUKB_STR-EVENTNAME sy-vline 
WA_RCUKB_STR-EVENTDESCR sy-vline 
WA_RCUKB_STR-FROMLINE sy-vline 
WA_RCUKB_STR-TOLINE sy-vline 
WA_RCUKB_STR-TOTALLINES sy-vline      INTO ld_text SEPARATED BY SPACE.

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