ABAP Select data from SAP table CKF_BUFFER_OBJECT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKF_BUFFER_OBJECT
*  INTO TABLE @DATA(IT_CKF_BUFFER_OBJECT2).
*--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_CKF_BUFFER_OBJECT INDEX 1 INTO DATA(WA_CKF_BUFFER_OBJECT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKF_BUFFER_OBJECT>-COSTING_VARIANT = 1.
<CKF_BUFFER_OBJECT>-COSTING_VERSION = 1.
<CKF_BUFFER_OBJECT>-VALUATION_AREA = 1.
<CKF_BUFFER_OBJECT>-PROFIT_CENTER_RE = 1.
<CKF_BUFFER_OBJECT>-MATERIAL_NUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKF_BUFFER_OBJECT-VALUATION_TYPE, sy-vline,
  WA_CKF_BUFFER_OBJECT-CREATION_DATE, sy-vline,
  WA_CKF_BUFFER_OBJECT-CREATION_TIME, sy-vline,
  WA_CKF_BUFFER_OBJECT-STATE, sy-vline,
  WA_CKF_BUFFER_OBJECT-PROFIT_CENTER, sy-vline,
  WA_CKF_BUFFER_OBJECT-BZOBJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKF_BUFFER_OBJECT 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_CKF_BUFFER_OBJECT 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_CKF_BUFFER_OBJECT INTO WA_CKF_BUFFER_OBJECT.


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

*Conversion exit MATN1, internal->external for field MATERIAL_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CKF_BUFFER_OBJECT-MATERIAL_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKF_BUFFER_OBJECT-MATERIAL_NUMBER.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field UNIT_OF_MEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CKF_BUFFER_OBJECT-UNIT_OF_MEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKF_BUFFER_OBJECT-UNIT_OF_MEASURE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PRICE_UNIT_MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CKF_BUFFER_OBJECT-PRICE_UNIT_MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKF_BUFFER_OBJECT-PRICE_UNIT_MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COST_ELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CKF_BUFFER_OBJECT-COST_ELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKF_BUFFER_OBJECT-COST_ELEMENT.
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_CKF_BUFFER_OBJECT_STR, 
COSTING_VARIANT TYPE STRING,
COSTING_VERSION TYPE STRING,
VALUATION_AREA TYPE STRING,
PROFIT_CENTER_RE TYPE STRING,
MATERIAL_NUMBER TYPE STRING,
VALUATION_TYPE TYPE STRING,
CREATION_DATE TYPE STRING,
CREATION_TIME TYPE STRING,
STATE TYPE STRING,
PROFIT_CENTER TYPE STRING,
BZOBJ TYPE STRING,
KALNR TYPE STRING,
KALKA TYPE STRING,
KADKY TYPE STRING,
TVERS TYPE STRING,
BWVAR TYPE STRING,
KKZMA TYPE STRING,
USTRAT TYPE STRING,
QUANTITY TYPE STRING,
UNIT_OF_MEASURE TYPE STRING,
PRICE_UNIT TYPE STRING,
PRICE_UNIT_MEINS TYPE STRING,
PARTNER TYPE STRING,
STRUCTURE TYPE STRING,
COST_COMPONENT_NUMBER TYPE STRING,
COST_ELEMENT TYPE STRING,
PRICE_STRATEGY TYPE STRING,
PLANT TYPE STRING,
ORIGIN_GROUP TYPE STRING,
ORIGIN_MATERIAL TYPE STRING,
BATCH TYPE STRING,
DEPENDENT_REQ_IND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKF_BUFFER_OBJECT_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_CKF_BUFFER_OBJECT_STR-COSTING_VARIANT sy-vline 
WA_CKF_BUFFER_OBJECT_STR-COSTING_VERSION sy-vline 
WA_CKF_BUFFER_OBJECT_STR-VALUATION_AREA sy-vline 
WA_CKF_BUFFER_OBJECT_STR-PROFIT_CENTER_RE sy-vline 
WA_CKF_BUFFER_OBJECT_STR-MATERIAL_NUMBER sy-vline 
WA_CKF_BUFFER_OBJECT_STR-VALUATION_TYPE sy-vline 
WA_CKF_BUFFER_OBJECT_STR-CREATION_DATE sy-vline 
WA_CKF_BUFFER_OBJECT_STR-CREATION_TIME sy-vline 
WA_CKF_BUFFER_OBJECT_STR-STATE sy-vline 
WA_CKF_BUFFER_OBJECT_STR-PROFIT_CENTER sy-vline 
WA_CKF_BUFFER_OBJECT_STR-BZOBJ sy-vline 
WA_CKF_BUFFER_OBJECT_STR-KALNR sy-vline 
WA_CKF_BUFFER_OBJECT_STR-KALKA sy-vline 
WA_CKF_BUFFER_OBJECT_STR-KADKY sy-vline 
WA_CKF_BUFFER_OBJECT_STR-TVERS sy-vline 
WA_CKF_BUFFER_OBJECT_STR-BWVAR sy-vline 
WA_CKF_BUFFER_OBJECT_STR-KKZMA sy-vline 
WA_CKF_BUFFER_OBJECT_STR-USTRAT sy-vline 
WA_CKF_BUFFER_OBJECT_STR-QUANTITY sy-vline 
WA_CKF_BUFFER_OBJECT_STR-UNIT_OF_MEASURE sy-vline 
WA_CKF_BUFFER_OBJECT_STR-PRICE_UNIT sy-vline 
WA_CKF_BUFFER_OBJECT_STR-PRICE_UNIT_MEINS sy-vline 
WA_CKF_BUFFER_OBJECT_STR-PARTNER sy-vline 
WA_CKF_BUFFER_OBJECT_STR-STRUCTURE sy-vline 
WA_CKF_BUFFER_OBJECT_STR-COST_COMPONENT_NUMBER sy-vline 
WA_CKF_BUFFER_OBJECT_STR-COST_ELEMENT sy-vline 
WA_CKF_BUFFER_OBJECT_STR-PRICE_STRATEGY sy-vline 
WA_CKF_BUFFER_OBJECT_STR-PLANT sy-vline 
WA_CKF_BUFFER_OBJECT_STR-ORIGIN_GROUP sy-vline 
WA_CKF_BUFFER_OBJECT_STR-ORIGIN_MATERIAL sy-vline 
WA_CKF_BUFFER_OBJECT_STR-BATCH sy-vline 
WA_CKF_BUFFER_OBJECT_STR-DEPENDENT_REQ_IND sy-vline      INTO ld_text SEPARATED BY SPACE.

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