ABAP Select data from SAP table CKMI1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CKMI1 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 CKMI1. 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 CKMI1 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_CKMI1 TYPE STANDARD TABLE OF CKMI1,
      WA_CKMI1 TYPE CKMI1,
      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: <CKMI1> TYPE CKMI1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CKMI1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CKMI1
  INTO TABLE IT_CKMI1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKMI1
*  INTO TABLE @DATA(IT_CKMI12).
*--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_CKMI1 INDEX 1 INTO DATA(WA_CKMI12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CKMI1 ASSIGNING <CKMI1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKMI1>-MANDT = 1.
<CKMI1>-KALNR = 1.
<CKMI1>-BDATJ = 1.
<CKMI1>-POPER = 1.
<CKMI1>-AWTYP = 1.

ENDLOOP.

LOOP AT IT_CKMI1 INTO WA_CKMI1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKMI1-AWREF, sy-vline,
  WA_CKMI1-AWORG, sy-vline,
  WA_CKMI1-GLVOR, sy-vline,
  WA_CKMI1-LBKUM, sy-vline,
  WA_CKMI1-SALK3, sy-vline,
  WA_CKMI1-VERPR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKMI1 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_CKMI1 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_CKMI1 INTO WA_CKMI1.


*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_CKMI1-BDATJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMI1-BDATJ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CKMI1-AWREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMI1-AWREF.
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_CKMI1_STR, 
MANDT TYPE STRING,
KALNR TYPE STRING,
BDATJ TYPE STRING,
POPER TYPE STRING,
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
GLVOR TYPE STRING,
LBKUM TYPE STRING,
SALK3 TYPE STRING,
VERPR TYPE STRING,
STPRS TYPE STRING,
BWKEY TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
VBDATUM TYPE STRING,
VBUZEIT TYPE STRING,
MENGE TYPE STRING,
WRBTR TYPE STRING,
SOBKZ TYPE STRING,
KZBWS TYPE STRING,
VKSAL TYPE STRING,
VKWRT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKMI1_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_CKMI1_STR-MANDT sy-vline 
WA_CKMI1_STR-KALNR sy-vline 
WA_CKMI1_STR-BDATJ sy-vline 
WA_CKMI1_STR-POPER sy-vline 
WA_CKMI1_STR-AWTYP sy-vline 
WA_CKMI1_STR-AWREF sy-vline 
WA_CKMI1_STR-AWORG sy-vline 
WA_CKMI1_STR-GLVOR sy-vline 
WA_CKMI1_STR-LBKUM sy-vline 
WA_CKMI1_STR-SALK3 sy-vline 
WA_CKMI1_STR-VERPR sy-vline 
WA_CKMI1_STR-STPRS sy-vline 
WA_CKMI1_STR-BWKEY sy-vline 
WA_CKMI1_STR-DATUM sy-vline 
WA_CKMI1_STR-UZEIT sy-vline 
WA_CKMI1_STR-VBDATUM sy-vline 
WA_CKMI1_STR-VBUZEIT sy-vline 
WA_CKMI1_STR-MENGE sy-vline 
WA_CKMI1_STR-WRBTR sy-vline 
WA_CKMI1_STR-SOBKZ sy-vline 
WA_CKMI1_STR-KZBWS sy-vline 
WA_CKMI1_STR-VKSAL sy-vline 
WA_CKMI1_STR-VKWRT sy-vline      INTO ld_text SEPARATED BY SPACE.

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