ABAP Select data from SAP table /SCWM/MFSTELELOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/MFSTELELOG
*  INTO TABLE @DATA(IT_/SCWM/MFSTELELOG2).
*--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_/SCWM/MFSTELELOG INDEX 1 INTO DATA(WA_/SCWM/MFSTELELOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/MFSTELELOG>-MANDT = 1.
</SCWM/MFSTELELOG>-LGNUM = 1.
</SCWM/MFSTELELOG>-PLC = 1.
</SCWM/MFSTELELOG>-CHANNEL = 1.
</SCWM/MFSTELELOG>-TIMESTAMP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/MFSTELELOG-SENDER, sy-vline,
  WA_/SCWM/MFSTELELOG-RECEIVER, sy-vline,
  WA_/SCWM/MFSTELELOG-CP, sy-vline,
  WA_/SCWM/MFSTELELOG-HANDSHAKE, sy-vline,
  WA_/SCWM/MFSTELELOG-SEQU_NO, sy-vline,
  WA_/SCWM/MFSTELELOG-COMM_ERROR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/MFSTELELOG 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_/SCWM/MFSTELELOG 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_/SCWM/MFSTELELOG INTO WA_/SCWM/MFSTELELOG.


*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 MFSTS, internal->external for field TIMESTAMP
CALL FUNCTION 'CONVERSION_EXIT_MFSTS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/MFSTELELOG-TIMESTAMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/MFSTELELOG-TIMESTAMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit HUID, internal->external for field HUIDENT
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/MFSTELELOG-HUIDENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/MFSTELELOG-HUIDENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field TANUM
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/MFSTELELOG-TANUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/MFSTELELOG-TANUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field WHO
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/MFSTELELOG-WHO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/MFSTELELOG-WHO.
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_/SCWM/MFSTELELOG_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
PLC TYPE STRING,
CHANNEL TYPE STRING,
TIMESTAMP TYPE STRING,
SENDER TYPE STRING,
RECEIVER TYPE STRING,
CP TYPE STRING,
HANDSHAKE TYPE STRING,
SEQU_NO TYPE STRING,
COMM_ERROR TYPE STRING,
TELETYPE TYPE STRING,
ACTION TYPE STRING,
HUIDENT TYPE STRING,
SOURCE TYPE STRING,
DEST TYPE STRING,
DIRECTION TYPE STRING,
MSG TYPE STRING,
MFS_ERROR TYPE STRING,
TANUM TYPE STRING,
WHO TYPE STRING,
DUMMY_MFSTELELOG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/MFSTELELOG_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_/SCWM/MFSTELELOG_STR-MANDT sy-vline 
WA_/SCWM/MFSTELELOG_STR-LGNUM sy-vline 
WA_/SCWM/MFSTELELOG_STR-PLC sy-vline 
WA_/SCWM/MFSTELELOG_STR-CHANNEL sy-vline 
WA_/SCWM/MFSTELELOG_STR-TIMESTAMP sy-vline 
WA_/SCWM/MFSTELELOG_STR-SENDER sy-vline 
WA_/SCWM/MFSTELELOG_STR-RECEIVER sy-vline 
WA_/SCWM/MFSTELELOG_STR-CP sy-vline 
WA_/SCWM/MFSTELELOG_STR-HANDSHAKE sy-vline 
WA_/SCWM/MFSTELELOG_STR-SEQU_NO sy-vline 
WA_/SCWM/MFSTELELOG_STR-COMM_ERROR sy-vline 
WA_/SCWM/MFSTELELOG_STR-TELETYPE sy-vline 
WA_/SCWM/MFSTELELOG_STR-ACTION sy-vline 
WA_/SCWM/MFSTELELOG_STR-HUIDENT sy-vline 
WA_/SCWM/MFSTELELOG_STR-SOURCE sy-vline 
WA_/SCWM/MFSTELELOG_STR-DEST sy-vline 
WA_/SCWM/MFSTELELOG_STR-DIRECTION sy-vline 
WA_/SCWM/MFSTELELOG_STR-MSG sy-vline 
WA_/SCWM/MFSTELELOG_STR-MFS_ERROR sy-vline 
WA_/SCWM/MFSTELELOG_STR-TANUM sy-vline 
WA_/SCWM/MFSTELELOG_STR-WHO sy-vline 
WA_/SCWM/MFSTELELOG_STR-DUMMY_MFSTELELOG sy-vline      INTO ld_text SEPARATED BY SPACE.

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