ABAP Select data from SAP table /SCWM/MFSTELELOG_EXT_DATE 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_EXT_DATE 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_EXT_DATE. 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_EXT_DATE 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_EXT_DATE TYPE STANDARD TABLE OF /SCWM/MFSTELELOG_EXT_DATE,
      WA_/SCWM/MFSTELELOG_EXT_DATE TYPE /SCWM/MFSTELELOG_EXT_DATE,
      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_EXT_DATE> TYPE /SCWM/MFSTELELOG_EXT_DATE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/MFSTELELOG_EXT_DATE
*  INTO TABLE @DATA(IT_/SCWM/MFSTELELOG_EXT_DATE2).
*--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_EXT_DATE INDEX 1 INTO DATA(WA_/SCWM/MFSTELELOG_EXT_DATE2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/MFSTELELOG_EXT_DATE-TS_TIME, sy-vline,
  WA_/SCWM/MFSTELELOG_EXT_DATE-TS_TIME_MS, sy-vline,
  WA_/SCWM/MFSTELELOG_EXT_DATE-TIMESTAMP, sy-vline,
  WA_/SCWM/MFSTELELOG_EXT_DATE-SENDER, sy-vline,
  WA_/SCWM/MFSTELELOG_EXT_DATE-RECEIVER, sy-vline,
  WA_/SCWM/MFSTELELOG_EXT_DATE-CP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/MFSTELELOG_EXT_DATE 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_EXT_DATE 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_EXT_DATE INTO WA_/SCWM/MFSTELELOG_EXT_DATE.


*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 HUID, internal->external for field HUIDENT
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/MFSTELELOG_EXT_DATE-HUIDENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/MFSTELELOG_EXT_DATE-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_EXT_DATE-TANUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/MFSTELELOG_EXT_DATE-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_EXT_DATE-WHO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/MFSTELELOG_EXT_DATE-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_EXT_DATE_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
PLC TYPE STRING,
CHANNEL TYPE STRING,
TS_DATE TYPE STRING,
TS_TIME TYPE STRING,
TS_TIME_MS 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,
MSG1 TYPE STRING,
MSG2 TYPE STRING,
MSG3 TYPE STRING,
MSG_LEN TYPE STRING,
MFS_ERROR TYPE STRING,
TANUM TYPE STRING,
WHO TYPE STRING,
HNDSHK_PERF TYPE STRING,
EWM_FOLLUP_PERF TYPE STRING,
PLC_FOLLUP_PERF TYPE STRING,
DUMMY_MFSTELELOG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/MFSTELELOG_EXT_DATE_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_EXT_DATE_STR-MANDT sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-LGNUM sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-PLC sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-CHANNEL sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-TS_DATE sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-TS_TIME sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-TS_TIME_MS sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-TIMESTAMP sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-SENDER sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-RECEIVER sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-CP sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-HANDSHAKE sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-SEQU_NO sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-COMM_ERROR sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-TELETYPE sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-ACTION sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-HUIDENT sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-SOURCE sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-DEST sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-DIRECTION sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-MSG sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-MSG1 sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-MSG2 sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-MSG3 sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-MSG_LEN sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-MFS_ERROR sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-TANUM sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-WHO sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-HNDSHK_PERF sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-EWM_FOLLUP_PERF sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_STR-PLC_FOLLUP_PERF sy-vline 
WA_/SCWM/MFSTELELOG_EXT_DATE_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.