ABAP Select data from SAP table /CUM/CTR_BUF_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /CUM/CTR_BUF_S 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 /CUM/CTR_BUF_S. 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 /CUM/CTR_BUF_S 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_/CUM/CTR_BUF_S TYPE STANDARD TABLE OF /CUM/CTR_BUF_S,
      WA_/CUM/CTR_BUF_S TYPE /CUM/CTR_BUF_S,
      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: </CUM/CTR_BUF_S> TYPE /CUM/CTR_BUF_S.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /CUM/CTR_BUF_S
  INTO TABLE IT_/CUM/CTR_BUF_S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /CUM/CTR_BUF_S
*  INTO TABLE @DATA(IT_/CUM/CTR_BUF_S2).
*--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_/CUM/CTR_BUF_S INDEX 1 INTO DATA(WA_/CUM/CTR_BUF_S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/CUM/CTR_BUF_S ASSIGNING </CUM/CTR_BUF_S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</CUM/CTR_BUF_S>-INDEX_PLKO = 1.
</CUM/CTR_BUF_S>-INDEX_PLFL = 1.
</CUM/CTR_BUF_S>-INDEX_PLAS = 1.
</CUM/CTR_BUF_S>-INDEX_PLPO = 1.
</CUM/CTR_BUF_S>-INDEX_SOPR = 1.

ENDLOOP.

LOOP AT IT_/CUM/CTR_BUF_S INTO WA_/CUM/CTR_BUF_S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/CUM/CTR_BUF_S-INDEX_PLAB, sy-vline,
  WA_/CUM/CTR_BUF_S-INDEX_PLTX, sy-vline,
  WA_/CUM/CTR_BUF_S-INDEX_PLMZ, sy-vline,
  WA_/CUM/CTR_BUF_S-INDEX_FLRE, sy-vline,
  WA_/CUM/CTR_BUF_S-INDEX_KORE, sy-vline,
  WA_/CUM/CTR_BUF_S-INDEX_POVW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/CUM/CTR_BUF_S 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_/CUM/CTR_BUF_S 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_/CUM/CTR_BUF_S INTO WA_/CUM/CTR_BUF_S.


*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 NUMCV, internal->external for field VORNR1
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_/CUM/CTR_BUF_S-VORNR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CUM/CTR_BUF_S-VORNR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR2
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_/CUM/CTR_BUF_S-VORNR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CUM/CTR_BUF_S-VORNR2.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field UVORN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_/CUM/CTR_BUF_S-UVORN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CUM/CTR_BUF_S-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_/CUM/CTR_BUF_S_STR, 
INDEX_PLKO TYPE STRING,
INDEX_PLFL TYPE STRING,
INDEX_PLAS TYPE STRING,
INDEX_PLPO TYPE STRING,
INDEX_SOPR TYPE STRING,
INDEX_PLAB TYPE STRING,
INDEX_PLTX TYPE STRING,
INDEX_PLMZ TYPE STRING,
INDEX_FLRE TYPE STRING,
INDEX_KORE TYPE STRING,
INDEX_POVW TYPE STRING,
INDEX_ASVW TYPE STRING,
INDEX_PLFH TYPE STRING,
INDEX_PLMK TYPE STRING,
INDEX_PLMW TYPE STRING,
INDEX_PLWP TYPE STRING,
INDEX_APOS TYPE STRING,
INDEX_PLPH TYPE STRING,
INDEX_MLST TYPE STRING,
INDEX_SNET TYPE STRING,
INDEX_PLFT TYPE STRING,
INDEX_PLFV TYPE STRING,
INDEX_MKAL TYPE STRING,
OBJECT TYPE STRING,
AKTYP TYPE STRING,
VORNR1 TYPE STRING,
VORNR2 TYPE STRING,
VORNR TYPE STRING,
UVORN TYPE STRING,
VGWT1 TYPE STRING,
VGWT2 TYPE STRING,
OPRTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/CUM/CTR_BUF_S_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_/CUM/CTR_BUF_S_STR-INDEX_PLKO sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLFL sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLAS sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLPO sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_SOPR sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLAB sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLTX sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLMZ sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_FLRE sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_KORE sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_POVW sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_ASVW sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLFH sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLMK sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLMW sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLWP sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_APOS sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLPH sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_MLST sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_SNET sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLFT sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_PLFV sy-vline 
WA_/CUM/CTR_BUF_S_STR-INDEX_MKAL sy-vline 
WA_/CUM/CTR_BUF_S_STR-OBJECT sy-vline 
WA_/CUM/CTR_BUF_S_STR-AKTYP sy-vline 
WA_/CUM/CTR_BUF_S_STR-VORNR1 sy-vline 
WA_/CUM/CTR_BUF_S_STR-VORNR2 sy-vline 
WA_/CUM/CTR_BUF_S_STR-VORNR sy-vline 
WA_/CUM/CTR_BUF_S_STR-UVORN sy-vline 
WA_/CUM/CTR_BUF_S_STR-VGWT1 sy-vline 
WA_/CUM/CTR_BUF_S_STR-VGWT2 sy-vline 
WA_/CUM/CTR_BUF_S_STR-OPRTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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