ABAP Select data from SAP table CKML2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CKML2 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 CKML2. 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 CKML2 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_CKML2 TYPE STANDARD TABLE OF CKML2,
      WA_CKML2 TYPE CKML2,
      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: <CKML2> TYPE CKML2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CKML2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CKML2
  INTO TABLE IT_CKML2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKML2
*  INTO TABLE @DATA(IT_CKML22).
*--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_CKML2 INDEX 1 INTO DATA(WA_CKML22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CKML2 ASSIGNING <CKML2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKML2>-MANDT = 1.
<CKML2>-KALNR = 1.
<CKML2>-MATLED = 1.
<CKML2>-BWKEY = 1.
<CKML2>-BWTAR = 1.

ENDLOOP.

LOOP AT IT_CKML2 INTO WA_CKML2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKML2-MATNR, sy-vline,
  WA_CKML2-XABRECH, sy-vline,
  WA_CKML2-ABRECHDAT, sy-vline,
  WA_CKML2-XABRERR, sy-vline,
  WA_CKML2-XSPRS, sy-vline,
  WA_CKML2-SPRSDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKML2 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_CKML2 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_CKML2 INTO WA_CKML2.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CKML2-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKML2-MATNR.
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_CKML2_STR, 
MANDT TYPE STRING,
KALNR TYPE STRING,
MATLED TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
MATNR TYPE STRING,
XABRECH TYPE STRING,
ABRECHDAT TYPE STRING,
XABRERR TYPE STRING,
XSPRS TYPE STRING,
SPRSDAT TYPE STRING,
SPRSDAT_2 TYPE STRING,
SPRSDAT_3 TYPE STRING,
XZPRS TYPE STRING,
ZPRSDAT TYPE STRING,
ZPRSDAT_2 TYPE STRING,
ZPRSDAT_3 TYPE STRING,
ZPLPR_1 TYPE STRING,
ZPLPR_2 TYPE STRING,
ZPLPR_3 TYPE STRING,
ZKPRS_1 TYPE STRING,
ZKPRS_2 TYPE STRING,
ZKPRS_3 TYPE STRING,
ABRECHUHR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKML2_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_CKML2_STR-MANDT sy-vline 
WA_CKML2_STR-KALNR sy-vline 
WA_CKML2_STR-MATLED sy-vline 
WA_CKML2_STR-BWKEY sy-vline 
WA_CKML2_STR-BWTAR sy-vline 
WA_CKML2_STR-MATNR sy-vline 
WA_CKML2_STR-XABRECH sy-vline 
WA_CKML2_STR-ABRECHDAT sy-vline 
WA_CKML2_STR-XABRERR sy-vline 
WA_CKML2_STR-XSPRS sy-vline 
WA_CKML2_STR-SPRSDAT sy-vline 
WA_CKML2_STR-SPRSDAT_2 sy-vline 
WA_CKML2_STR-SPRSDAT_3 sy-vline 
WA_CKML2_STR-XZPRS sy-vline 
WA_CKML2_STR-ZPRSDAT sy-vline 
WA_CKML2_STR-ZPRSDAT_2 sy-vline 
WA_CKML2_STR-ZPRSDAT_3 sy-vline 
WA_CKML2_STR-ZPLPR_1 sy-vline 
WA_CKML2_STR-ZPLPR_2 sy-vline 
WA_CKML2_STR-ZPLPR_3 sy-vline 
WA_CKML2_STR-ZKPRS_1 sy-vline 
WA_CKML2_STR-ZKPRS_2 sy-vline 
WA_CKML2_STR-ZKPRS_3 sy-vline 
WA_CKML2_STR-ABRECHUHR sy-vline      INTO ld_text SEPARATED BY SPACE.

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