ABAP Select data from SAP table CMMD_SKU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMMD_SKU
*  INTO TABLE @DATA(IT_CMMD_SKU2).
*--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_CMMD_SKU INDEX 1 INTO DATA(WA_CMMD_SKU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMMD_SKU>-MANDT = 1.
<CMMD_SKU>-MATNR = 1.
<CMMD_SKU>-HIER_ID = 1.
<CMMD_SKU>-STRATEGY = 1.
<CMMD_SKU>-CDT1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMMD_SKU-CDT2, sy-vline,
  WA_CMMD_SKU-CDT3, sy-vline,
  WA_CMMD_SKU-CDT4, sy-vline,
  WA_CMMD_SKU-CDT5, sy-vline,
  WA_CMMD_SKU-CDT6, sy-vline,
  WA_CMMD_SKU-CDT7, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMMD_SKU 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_CMMD_SKU 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_CMMD_SKU INTO WA_CMMD_SKU.


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

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

*Conversion exit CUNIT, internal->external for field LINUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CMMD_SKU-LINUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMD_SKU-LINUNIT.
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_CMMD_SKU_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
HIER_ID TYPE STRING,
STRATEGY TYPE STRING,
CDT1 TYPE STRING,
CDT2 TYPE STRING,
CDT3 TYPE STRING,
CDT4 TYPE STRING,
CDT5 TYPE STRING,
CDT6 TYPE STRING,
CDT7 TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SHLFSPC TYPE STRING,
LINSPC TYPE STRING,
SPACEUNIT TYPE STRING,
LINUNIT TYPE STRING,
CHKDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMMD_SKU_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_CMMD_SKU_STR-MANDT sy-vline 
WA_CMMD_SKU_STR-MATNR sy-vline 
WA_CMMD_SKU_STR-HIER_ID sy-vline 
WA_CMMD_SKU_STR-STRATEGY sy-vline 
WA_CMMD_SKU_STR-CDT1 sy-vline 
WA_CMMD_SKU_STR-CDT2 sy-vline 
WA_CMMD_SKU_STR-CDT3 sy-vline 
WA_CMMD_SKU_STR-CDT4 sy-vline 
WA_CMMD_SKU_STR-CDT5 sy-vline 
WA_CMMD_SKU_STR-CDT6 sy-vline 
WA_CMMD_SKU_STR-CDT7 sy-vline 
WA_CMMD_SKU_STR-VKORG sy-vline 
WA_CMMD_SKU_STR-VTWEG sy-vline 
WA_CMMD_SKU_STR-SHLFSPC sy-vline 
WA_CMMD_SKU_STR-LINSPC sy-vline 
WA_CMMD_SKU_STR-SPACEUNIT sy-vline 
WA_CMMD_SKU_STR-LINUNIT sy-vline 
WA_CMMD_SKU_STR-CHKDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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