ABAP Select data from SAP table VCHCLF_S_TRACEMESSAGE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VCHCLF_S_TRACEMESSAGE
*  INTO TABLE @DATA(IT_VCHCLF_S_TRACEMESSAGE2).
*--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_VCHCLF_S_TRACEMESSAGE INDEX 1 INTO DATA(WA_VCHCLF_S_TRACEMESSAGE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VCHCLF_S_TRACEMESSAGE>-LINE_NO = 1.
<VCHCLF_S_TRACEMESSAGE>-TEXT = 1.
<VCHCLF_S_TRACEMESSAGE>-CONTEXTID = 1.
<VCHCLF_S_TRACEMESSAGE>-TRACEMESSAGETIMESTAMP = 1.
<VCHCLF_S_TRACEMESSAGE>-VALUESETBY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VCHCLF_S_TRACEMESSAGE-META_TEXT, sy-vline,
  WA_VCHCLF_S_TRACEMESSAGE-CSTIC_ID, sy-vline,
  WA_VCHCLF_S_TRACEMESSAGE-CSTIC_NAME, sy-vline,
  WA_VCHCLF_S_TRACEMESSAGE-CSTIC_VALUE_1_ID, sy-vline,
  WA_VCHCLF_S_TRACEMESSAGE-CSTIC_VALUE_1_NAME, sy-vline,
  WA_VCHCLF_S_TRACEMESSAGE-CSTIC_VALUE_2_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VCHCLF_S_TRACEMESSAGE 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_VCHCLF_S_TRACEMESSAGE 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_VCHCLF_S_TRACEMESSAGE INTO WA_VCHCLF_S_TRACEMESSAGE.


*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 BOM_COMPONENT_NAME
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_VCHCLF_S_TRACEMESSAGE-BOM_COMPONENT_NAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VCHCLF_S_TRACEMESSAGE-BOM_COMPONENT_NAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field BOM_ITEM_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_VCHCLF_S_TRACEMESSAGE-BOM_ITEM_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VCHCLF_S_TRACEMESSAGE-BOM_ITEM_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field INSTANCE_NAME
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_VCHCLF_S_TRACEMESSAGE-INSTANCE_NAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VCHCLF_S_TRACEMESSAGE-INSTANCE_NAME.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit NUMCV, internal->external for field BILL_OF_OPERATIONS_OPERATION
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_VCHCLF_S_TRACEMESSAGE-BILL_OF_OPERATIONS_OPERATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VCHCLF_S_TRACEMESSAGE-BILL_OF_OPERATIONS_OPERATION.
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_VCHCLF_S_TRACEMESSAGE_STR, 
LINE_NO TYPE STRING,
TEXT TYPE STRING,
CONTEXTID TYPE STRING,
TRACEMESSAGETIMESTAMP TYPE STRING,
VALUESETBY TYPE STRING,
META_TEXT TYPE STRING,
CSTIC_ID TYPE STRING,
CSTIC_NAME TYPE STRING,
CSTIC_VALUE_1_ID TYPE STRING,
CSTIC_VALUE_1_NAME TYPE STRING,
CSTIC_VALUE_2_ID TYPE STRING,
CSTIC_VALUE_2_NAME TYPE STRING,
TRACE_MESSAGE_NUMBER TYPE STRING,
DEPENDENCY_OBJECT TYPE STRING,
DEPENDENCY_OBJECT_NAME TYPE STRING,
DEPENDENCY_OBJECT_NUMBER TYPE STRING,
BOM_COMPONENT_ID TYPE STRING,
BOM_COMPONENT_NAME TYPE STRING,
BOM_ITEM_NUMBER TYPE STRING,
TYPE TYPE STRING,
TRACE_LEVEL TYPE STRING,
TECHNICAL_NUMBER TYPE STRING,
CONFIGURATIONINSTANCE TYPE STRING,
INSTANCE_NAME TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
PZLFH TYPE STRING,
PLNKN TYPE STRING,
BILL_OF_OPERATIONS_OPERATION TYPE STRING,
OPERATION_TEXT TYPE STRING,
SEQUENCE_TEXT TYPE STRING,
PRODN_RSCE_TOOL_TEXT TYPE STRING,
NODE_ID TYPE STRING,
TREE_ID TYPE STRING,
NODE_TYPE TYPE STRING,
BOOINTERNALVERSIONCOUNTER TYPE STRING,
PRODUCTIONRESOURCETOOL TYPE STRING,
CLASS_NUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VCHCLF_S_TRACEMESSAGE_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_VCHCLF_S_TRACEMESSAGE_STR-LINE_NO sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-TEXT sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-CONTEXTID sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-TRACEMESSAGETIMESTAMP sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-VALUESETBY sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-META_TEXT sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-CSTIC_ID sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-CSTIC_NAME sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-CSTIC_VALUE_1_ID sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-CSTIC_VALUE_1_NAME sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-CSTIC_VALUE_2_ID sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-CSTIC_VALUE_2_NAME sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-TRACE_MESSAGE_NUMBER sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-DEPENDENCY_OBJECT sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-DEPENDENCY_OBJECT_NAME sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-DEPENDENCY_OBJECT_NUMBER sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-BOM_COMPONENT_ID sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-BOM_COMPONENT_NAME sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-BOM_ITEM_NUMBER sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-TYPE sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-TRACE_LEVEL sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-TECHNICAL_NUMBER sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-CONFIGURATIONINSTANCE sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-INSTANCE_NAME sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-PLNTY sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-PLNNR sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-PLNAL sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-PLNFL sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-PZLFH sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-PLNKN sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-BILL_OF_OPERATIONS_OPERATION sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-OPERATION_TEXT sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-SEQUENCE_TEXT sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-PRODN_RSCE_TOOL_TEXT sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-NODE_ID sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-TREE_ID sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-NODE_TYPE sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-BOOINTERNALVERSIONCOUNTER sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-PRODUCTIONRESOURCETOOL sy-vline 
WA_VCHCLF_S_TRACEMESSAGE_STR-CLASS_NUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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