ABAP Select data from SAP table RCUKB1_DI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCUKB1_DI 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 RCUKB1_DI. 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 RCUKB1_DI 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_RCUKB1_DI TYPE STANDARD TABLE OF RCUKB1_DI,
      WA_RCUKB1_DI TYPE RCUKB1_DI,
      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: <RCUKB1_DI> TYPE RCUKB1_DI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RCUKB1_DI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RCUKB1_DI
  INTO TABLE IT_RCUKB1_DI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCUKB1_DI
*  INTO TABLE @DATA(IT_RCUKB1_DI2).
*--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_RCUKB1_DI INDEX 1 INTO DATA(WA_RCUKB1_DI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RCUKB1_DI ASSIGNING <RCUKB1_DI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCUKB1_DI>-ACTTYP = 1.
<RCUKB1_DI>-OBJ = 1.
<RCUKB1_DI>-PLNAL = 1.
<RCUKB1_DI>-PLNFL = 1.
<RCUKB1_DI>-VORNR = 1.

ENDLOOP.

LOOP AT IT_RCUKB1_DI INTO WA_RCUKB1_DI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCUKB1_DI-VORKN, sy-vline,
  WA_RCUKB1_DI-UVORN, sy-vline,
  WA_RCUKB1_DI-UVOKN, sy-vline,
  WA_RCUKB1_DI-PSNFH, sy-vline,
  WA_RCUKB1_DI-PZLFH, sy-vline,
  WA_RCUKB1_DI-KN_BA_FROM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCUKB1_DI 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_RCUKB1_DI 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_RCUKB1_DI INTO WA_RCUKB1_DI.


*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 PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCUKB1_DI-PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCUKB1_DI-PLNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNFL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCUKB1_DI-PLNFL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCUKB1_DI-PLNFL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RCUKB1_DI-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCUKB1_DI-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field UVORN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RCUKB1_DI-UVORN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCUKB1_DI-UVORN.
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_RCUKB1_DI_STR, 
ACTTYP TYPE STRING,
OBJ TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
VORNR TYPE STRING,
VORKN TYPE STRING,
UVORN TYPE STRING,
UVOKN TYPE STRING,
PSNFH TYPE STRING,
PZLFH TYPE STRING,
KN_BA_FROM TYPE STRING,
KN_BA_TO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCUKB1_DI_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_RCUKB1_DI_STR-ACTTYP sy-vline 
WA_RCUKB1_DI_STR-OBJ sy-vline 
WA_RCUKB1_DI_STR-PLNAL sy-vline 
WA_RCUKB1_DI_STR-PLNFL sy-vline 
WA_RCUKB1_DI_STR-VORNR sy-vline 
WA_RCUKB1_DI_STR-VORKN sy-vline 
WA_RCUKB1_DI_STR-UVORN sy-vline 
WA_RCUKB1_DI_STR-UVOKN sy-vline 
WA_RCUKB1_DI_STR-PSNFH sy-vline 
WA_RCUKB1_DI_STR-PZLFH sy-vline 
WA_RCUKB1_DI_STR-KN_BA_FROM sy-vline 
WA_RCUKB1_DI_STR-KN_BA_TO sy-vline      INTO ld_text SEPARATED BY SPACE.

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