ABAP Select data from SAP table CKMLDUV_S_TABLE_PREP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKMLDUV_S_TABLE_PREP
*  INTO TABLE @DATA(IT_CKMLDUV_S_TABLE_PREP2).
*--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_CKMLDUV_S_TABLE_PREP INDEX 1 INTO DATA(WA_CKMLDUV_S_TABLE_PREP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKMLDUV_S_TABLE_PREP>-MANDT = 1.
<CKMLDUV_S_TABLE_PREP>-IBLNR = 1.
<CKMLDUV_S_TABLE_PREP>-GJAHR = 1.
<CKMLDUV_S_TABLE_PREP>-ZEILI = 1.
<CKMLDUV_S_TABLE_PREP>-STATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKMLDUV_S_TABLE_PREP-BUKRS, sy-vline,
  WA_CKMLDUV_S_TABLE_PREP-NO_DIST, sy-vline,
  WA_CKMLDUV_S_TABLE_PREP-MEINS, sy-vline,
  WA_CKMLDUV_S_TABLE_PREP-MENGE, sy-vline,
  WA_CKMLDUV_S_TABLE_PREP-SDAT, sy-vline,
  WA_CKMLDUV_S_TABLE_PREP-EDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKMLDUV_S_TABLE_PREP 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_CKMLDUV_S_TABLE_PREP 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_CKMLDUV_S_TABLE_PREP INTO WA_CKMLDUV_S_TABLE_PREP.


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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUV_S_TABLE_PREP-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUV_S_TABLE_PREP-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUV_S_TABLE_PREP-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUV_S_TABLE_PREP-KUNNR.
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_CKMLDUV_S_TABLE_PREP_STR, 
MANDT TYPE STRING,
IBLNR TYPE STRING,
GJAHR TYPE STRING,
ZEILI TYPE STRING,
STATUS TYPE STRING,
BUKRS TYPE STRING,
NO_DIST TYPE STRING,
MEINS TYPE STRING,
MENGE TYPE STRING,
SDAT TYPE STRING,
EDAT TYPE STRING,
APLID TYPE STRING,
PROTNR TYPE STRING,
BWART TYPE STRING,
BWTAR TYPE STRING,
SHKZG TYPE STRING,
BUDAT TYPE STRING,
INTNUM TYPE STRING,
MARK TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
BSTAR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
ORI_EDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKMLDUV_S_TABLE_PREP_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_CKMLDUV_S_TABLE_PREP_STR-MANDT sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-IBLNR sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-GJAHR sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-ZEILI sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-STATUS sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-BUKRS sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-NO_DIST sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-MEINS sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-MENGE sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-SDAT sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-EDAT sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-APLID sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-PROTNR sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-BWART sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-BWTAR sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-SHKZG sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-BUDAT sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-INTNUM sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-MARK sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-MATNR sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-WERKS sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-LGORT sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-CHARG sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-SOBKZ sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-BSTAR sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-KDAUF sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-KDPOS sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-KDEIN sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-LIFNR sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-KUNNR sy-vline 
WA_CKMLDUV_S_TABLE_PREP_STR-ORI_EDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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