ABAP Select data from SAP table CKMLPP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKMLPP
*  INTO TABLE @DATA(IT_CKMLPP2).
*--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_CKMLPP INDEX 1 INTO DATA(WA_CKMLPP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKMLPP>-MANDT = 1.
<CKMLPP>-KALNR = 1.
<CKMLPP>-BDATJ = 1.
<CKMLPP>-POPER = 1.
<CKMLPP>-UNTPER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKMLPP-KZ_ABGER, sy-vline,
  WA_CKMLPP-XKONCHK, sy-vline,
  WA_CKMLPP-STATUS, sy-vline,
  WA_CKMLPP-MEINS, sy-vline,
  WA_CKMLPP-SAPRL, sy-vline,
  WA_CKMLPP-XERROR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKMLPP 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_CKMLPP 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_CKMLPP INTO WA_CKMLPP.


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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CKMLPP-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLPP-MEINS.
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_CKMLPP_STR, 
MANDT TYPE STRING,
KALNR TYPE STRING,
BDATJ TYPE STRING,
POPER TYPE STRING,
UNTPER TYPE STRING,
KZ_ABGER TYPE STRING,
XKONCHK TYPE STRING,
STATUS TYPE STRING,
MEINS TYPE STRING,
SAPRL TYPE STRING,
XERROR TYPE STRING,
CD_OK TYPE STRING,
XNEWCCSNEXTMON TYPE STRING,
XMYMP TYPE STRING,
LBKUM TYPE STRING,
UMKUMO TYPE STRING,
ABKUMO TYPE STRING,
ZUKUMO TYPE STRING,
SZKUMO TYPE STRING,
VPKUMO TYPE STRING,
VNKUMO TYPE STRING,
EKKUMO TYPE STRING,
PBKUMO TYPE STRING,
PBPOPO TYPE STRING,
VPPOPO TYPE STRING,
UMKUMA TYPE STRING,
ZUKUMA TYPE STRING,
EKKUMA TYPE STRING,
PBKUMA TYPE STRING,
XVNB TYPE STRING,
XWIP TYPE STRING,
XOBJWIP TYPE STRING,
XNOPL TYPE STRING,
XMSTUF TYPE STRING,
XCKMM TYPE STRING,
XCLEAN TYPE STRING,
XAVRSIM TYPE STRING,
SDM_VERSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKMLPP_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_CKMLPP_STR-MANDT sy-vline 
WA_CKMLPP_STR-KALNR sy-vline 
WA_CKMLPP_STR-BDATJ sy-vline 
WA_CKMLPP_STR-POPER sy-vline 
WA_CKMLPP_STR-UNTPER sy-vline 
WA_CKMLPP_STR-KZ_ABGER sy-vline 
WA_CKMLPP_STR-XKONCHK sy-vline 
WA_CKMLPP_STR-STATUS sy-vline 
WA_CKMLPP_STR-MEINS sy-vline 
WA_CKMLPP_STR-SAPRL sy-vline 
WA_CKMLPP_STR-XERROR sy-vline 
WA_CKMLPP_STR-CD_OK sy-vline 
WA_CKMLPP_STR-XNEWCCSNEXTMON sy-vline 
WA_CKMLPP_STR-XMYMP sy-vline 
WA_CKMLPP_STR-LBKUM sy-vline 
WA_CKMLPP_STR-UMKUMO sy-vline 
WA_CKMLPP_STR-ABKUMO sy-vline 
WA_CKMLPP_STR-ZUKUMO sy-vline 
WA_CKMLPP_STR-SZKUMO sy-vline 
WA_CKMLPP_STR-VPKUMO sy-vline 
WA_CKMLPP_STR-VNKUMO sy-vline 
WA_CKMLPP_STR-EKKUMO sy-vline 
WA_CKMLPP_STR-PBKUMO sy-vline 
WA_CKMLPP_STR-PBPOPO sy-vline 
WA_CKMLPP_STR-VPPOPO sy-vline 
WA_CKMLPP_STR-UMKUMA sy-vline 
WA_CKMLPP_STR-ZUKUMA sy-vline 
WA_CKMLPP_STR-EKKUMA sy-vline 
WA_CKMLPP_STR-PBKUMA sy-vline 
WA_CKMLPP_STR-XVNB sy-vline 
WA_CKMLPP_STR-XWIP sy-vline 
WA_CKMLPP_STR-XOBJWIP sy-vline 
WA_CKMLPP_STR-XNOPL sy-vline 
WA_CKMLPP_STR-XMSTUF sy-vline 
WA_CKMLPP_STR-XCKMM sy-vline 
WA_CKMLPP_STR-XCLEAN sy-vline 
WA_CKMLPP_STR-XAVRSIM sy-vline 
WA_CKMLPP_STR-SDM_VERSION sy-vline      INTO ld_text SEPARATED BY SPACE.

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