ABAP Select data from SAP table CKS_CCS_DISPLAY_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKS_CCS_DISPLAY_ALV
*  INTO TABLE @DATA(IT_CKS_CCS_DISPLAY_ALV2).
*--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_CKS_CCS_DISPLAY_ALV INDEX 1 INTO DATA(WA_CKS_CCS_DISPLAY_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKS_CCS_DISPLAY_ALV>-KOKRS = 1.
<CKS_CCS_DISPLAY_ALV>-BUKRS = 1.
<CKS_CCS_DISPLAY_ALV>-BWKEY = 1.
<CKS_CCS_DISPLAY_ALV>-KOSTL = 1.
<CKS_CCS_DISPLAY_ALV>-LSTAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKS_CCS_DISPLAY_ALV-ELEHK, sy-vline,
  WA_CKS_CCS_DISPLAY_ALV-BWSTRAT, sy-vline,
  WA_CKS_CCS_DISPLAY_ALV-BWDAT, sy-vline,
  WA_CKS_CCS_DISPLAY_ALV-MENGE, sy-vline,
  WA_CKS_CCS_DISPLAY_ALV-MEINH, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_CKS_CCS_DISPLAY_ALV 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_CKS_CCS_DISPLAY_ALV 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_CKS_CCS_DISPLAY_ALV INTO WA_CKS_CCS_DISPLAY_ALV.


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

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CKS_CCS_DISPLAY_ALV-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKS_CCS_DISPLAY_ALV-MEINH.
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_CKS_CCS_DISPLAY_ALV_STR, 
KOKRS TYPE STRING,
BUKRS TYPE STRING,
BWKEY TYPE STRING,
KOSTL TYPE STRING,
LSTAR TYPE STRING,
ELEHK TYPE STRING,
BWSTRAT TYPE STRING,
BWDAT TYPE STRING,
MENGE TYPE STRING,
MEINH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKS_CCS_DISPLAY_ALV_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_CKS_CCS_DISPLAY_ALV_STR-KOKRS sy-vline 
WA_CKS_CCS_DISPLAY_ALV_STR-BUKRS sy-vline 
WA_CKS_CCS_DISPLAY_ALV_STR-BWKEY sy-vline 
WA_CKS_CCS_DISPLAY_ALV_STR-KOSTL sy-vline 
WA_CKS_CCS_DISPLAY_ALV_STR-LSTAR sy-vline 
WA_CKS_CCS_DISPLAY_ALV_STR-ELEHK sy-vline 
WA_CKS_CCS_DISPLAY_ALV_STR-BWSTRAT sy-vline 
WA_CKS_CCS_DISPLAY_ALV_STR-BWDAT sy-vline 
WA_CKS_CCS_DISPLAY_ALV_STR-MENGE sy-vline 
WA_CKS_CCS_DISPLAY_ALV_STR-MEINH sy-vline      INTO ld_text SEPARATED BY SPACE.

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