ABAP Select data from SAP table /SDF/CMO_T_42D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SDF/CMO_T_42D 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 /SDF/CMO_T_42D. 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 /SDF/CMO_T_42D 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_/SDF/CMO_T_42D TYPE STANDARD TABLE OF /SDF/CMO_T_42D,
      WA_/SDF/CMO_T_42D TYPE /SDF/CMO_T_42D,
      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: </SDF/CMO_T_42D> TYPE /SDF/CMO_T_42D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SDF/CMO_T_42D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SDF/CMO_T_42D
  INTO TABLE IT_/SDF/CMO_T_42D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SDF/CMO_T_42D
*  INTO TABLE @DATA(IT_/SDF/CMO_T_42D2).
*--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_/SDF/CMO_T_42D INDEX 1 INTO DATA(WA_/SDF/CMO_T_42D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SDF/CMO_T_42D ASSIGNING </SDF/CMO_T_42D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SDF/CMO_T_42D>-PGMID = 1.
</SDF/CMO_T_42D>-OBJECT = 1.
</SDF/CMO_T_42D>-OBJ_NAME = 1.
</SDF/CMO_T_42D>-KORRNUM = 1.
</SDF/CMO_T_42D>-SRCSYSTEM = 1.

ENDLOOP.

LOOP AT IT_/SDF/CMO_T_42D INTO WA_/SDF/CMO_T_42D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SDF/CMO_T_42D-AUTHOR, sy-vline,
  WA_/SDF/CMO_T_42D-SRCDEP, sy-vline,
  WA_/SDF/CMO_T_42D-DEVCLASS, sy-vline,
  WA_/SDF/CMO_T_42D-GENFLAG, sy-vline,
  WA_/SDF/CMO_T_42D-EDTFLAG, sy-vline,
  WA_/SDF/CMO_T_42D-CPROJECT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SDF/CMO_T_42D 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_/SDF/CMO_T_42D 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_/SDF/CMO_T_42D INTO WA_/SDF/CMO_T_42D.


*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 ISOLA, internal->external for field MASTERLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/SDF/CMO_T_42D-MASTERLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SDF/CMO_T_42D-MASTERLANG.
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_/SDF/CMO_T_42D_STR, 
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJ_NAME TYPE STRING,
KORRNUM TYPE STRING,
SRCSYSTEM TYPE STRING,
AUTHOR TYPE STRING,
SRCDEP TYPE STRING,
DEVCLASS TYPE STRING,
GENFLAG TYPE STRING,
EDTFLAG TYPE STRING,
CPROJECT TYPE STRING,
MASTERLANG TYPE STRING,
VERSID TYPE STRING,
PAKNOCHECK TYPE STRING,
OBJSTABLTY TYPE STRING,
COMPONENT TYPE STRING,
CRELEASE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SDF/CMO_T_42D_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_/SDF/CMO_T_42D_STR-PGMID sy-vline 
WA_/SDF/CMO_T_42D_STR-OBJECT sy-vline 
WA_/SDF/CMO_T_42D_STR-OBJ_NAME sy-vline 
WA_/SDF/CMO_T_42D_STR-KORRNUM sy-vline 
WA_/SDF/CMO_T_42D_STR-SRCSYSTEM sy-vline 
WA_/SDF/CMO_T_42D_STR-AUTHOR sy-vline 
WA_/SDF/CMO_T_42D_STR-SRCDEP sy-vline 
WA_/SDF/CMO_T_42D_STR-DEVCLASS sy-vline 
WA_/SDF/CMO_T_42D_STR-GENFLAG sy-vline 
WA_/SDF/CMO_T_42D_STR-EDTFLAG sy-vline 
WA_/SDF/CMO_T_42D_STR-CPROJECT sy-vline 
WA_/SDF/CMO_T_42D_STR-MASTERLANG sy-vline 
WA_/SDF/CMO_T_42D_STR-VERSID sy-vline 
WA_/SDF/CMO_T_42D_STR-PAKNOCHECK sy-vline 
WA_/SDF/CMO_T_42D_STR-OBJSTABLTY sy-vline 
WA_/SDF/CMO_T_42D_STR-COMPONENT sy-vline 
WA_/SDF/CMO_T_42D_STR-CRELEASE sy-vline      INTO ld_text SEPARATED BY SPACE.

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