ABAP Select data from SAP table SMKOL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SMKOL
*  INTO TABLE @DATA(IT_SMKOL2).
*--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_SMKOL INDEX 1 INTO DATA(WA_SMKOL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SMKOL>-MATNR = 1.
<SMKOL>-WERKS = 1.
<SMKOL>-LGORT = 1.
<SMKOL>-CHARG = 1.
<SMKOL>-LIFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SMKOL-SOBKZ, sy-vline,
  WA_SMKOL-RMKOL, sy-vline,
  WA_SMKOL-XDBUP, sy-vline,
  WA_SMKOL-SLABS, sy-vline,
  WA_SMKOL-SINSM, sy-vline,
  WA_SMKOL-SEINM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SMKOL 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_SMKOL 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_SMKOL INTO WA_SMKOL.


*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_SMKOL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMKOL-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field KLGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_SMKOL-KLGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SMKOL-KLGJA.
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_SMKOL_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
LIFNR TYPE STRING,
SOBKZ TYPE STRING,
RMKOL TYPE STRING,
XDBUP TYPE STRING,
SLABS TYPE STRING,
SINSM TYPE STRING,
SEINM TYPE STRING,
SSPEM TYPE STRING,
SVMLA TYPE STRING,
SVMIN TYPE STRING,
SVMEI TYPE STRING,
SVMSP TYPE STRING,
SLABS_OLD TYPE STRING,
SINSM_OLD TYPE STRING,
SEINM_OLD TYPE STRING,
SSPEM_OLD TYPE STRING,
SVMLA_OLD TYPE STRING,
SVMIN_OLD TYPE STRING,
SVMEI_OLD TYPE STRING,
SVMSP_OLD TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
LVORM TYPE STRING,
RMKOLH TYPE STRING,
KLLFM TYPE STRING,
KLGJA TYPE STRING,
KORUE TYPE STRING,
SGT_SCAT TYPE STRING,
/CWM/SLABS TYPE STRING,
/CWM/SINSM TYPE STRING,
/CWM/SEINM TYPE STRING,
/CWM/SSPEM TYPE STRING,
/CWM/SVMLA TYPE STRING,
/CWM/SVMIN TYPE STRING,
/CWM/SVMEI TYPE STRING,
/CWM/SVMSP TYPE STRING,
/CWM/SLABS_OLD TYPE STRING,
/CWM/SINSM_OLD TYPE STRING,
/CWM/SEINM_OLD TYPE STRING,
/CWM/SSPEM_OLD TYPE STRING,
/CWM/SVMLA_OLD TYPE STRING,
/CWM/SVMIN_OLD TYPE STRING,
/CWM/SVMEI_OLD TYPE STRING,
/CWM/SVMSP_OLD TYPE STRING,
FSH_SALLOC_QTY TYPE STRING,
FSH_SALLOC_QTY_OLD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SMKOL_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_SMKOL_STR-MATNR sy-vline 
WA_SMKOL_STR-WERKS sy-vline 
WA_SMKOL_STR-LGORT sy-vline 
WA_SMKOL_STR-CHARG sy-vline 
WA_SMKOL_STR-LIFNR sy-vline 
WA_SMKOL_STR-SOBKZ sy-vline 
WA_SMKOL_STR-RMKOL sy-vline 
WA_SMKOL_STR-XDBUP sy-vline 
WA_SMKOL_STR-SLABS sy-vline 
WA_SMKOL_STR-SINSM sy-vline 
WA_SMKOL_STR-SEINM sy-vline 
WA_SMKOL_STR-SSPEM sy-vline 
WA_SMKOL_STR-SVMLA sy-vline 
WA_SMKOL_STR-SVMIN sy-vline 
WA_SMKOL_STR-SVMEI sy-vline 
WA_SMKOL_STR-SVMSP sy-vline 
WA_SMKOL_STR-SLABS_OLD sy-vline 
WA_SMKOL_STR-SINSM_OLD sy-vline 
WA_SMKOL_STR-SEINM_OLD sy-vline 
WA_SMKOL_STR-SSPEM_OLD sy-vline 
WA_SMKOL_STR-SVMLA_OLD sy-vline 
WA_SMKOL_STR-SVMIN_OLD sy-vline 
WA_SMKOL_STR-SVMEI_OLD sy-vline 
WA_SMKOL_STR-SVMSP_OLD sy-vline 
WA_SMKOL_STR-LFGJA sy-vline 
WA_SMKOL_STR-LFMON sy-vline 
WA_SMKOL_STR-LVORM sy-vline 
WA_SMKOL_STR-RMKOLH sy-vline 
WA_SMKOL_STR-KLLFM sy-vline 
WA_SMKOL_STR-KLGJA sy-vline 
WA_SMKOL_STR-KORUE sy-vline 
WA_SMKOL_STR-SGT_SCAT sy-vline 
WA_SMKOL_STR-/CWM/SLABS sy-vline 
WA_SMKOL_STR-/CWM/SINSM sy-vline 
WA_SMKOL_STR-/CWM/SEINM sy-vline 
WA_SMKOL_STR-/CWM/SSPEM sy-vline 
WA_SMKOL_STR-/CWM/SVMLA sy-vline 
WA_SMKOL_STR-/CWM/SVMIN sy-vline 
WA_SMKOL_STR-/CWM/SVMEI sy-vline 
WA_SMKOL_STR-/CWM/SVMSP sy-vline 
WA_SMKOL_STR-/CWM/SLABS_OLD sy-vline 
WA_SMKOL_STR-/CWM/SINSM_OLD sy-vline 
WA_SMKOL_STR-/CWM/SEINM_OLD sy-vline 
WA_SMKOL_STR-/CWM/SSPEM_OLD sy-vline 
WA_SMKOL_STR-/CWM/SVMLA_OLD sy-vline 
WA_SMKOL_STR-/CWM/SVMIN_OLD sy-vline 
WA_SMKOL_STR-/CWM/SVMEI_OLD sy-vline 
WA_SMKOL_STR-/CWM/SVMSP_OLD sy-vline 
WA_SMKOL_STR-FSH_SALLOC_QTY sy-vline 
WA_SMKOL_STR-FSH_SALLOC_QTY_OLD sy-vline      INTO ld_text SEPARATED BY SPACE.

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