ABAP Select data from SAP table BWSD_LOGI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWSD_LOGI
*  INTO TABLE @DATA(IT_BWSD_LOGI2).
*--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_BWSD_LOGI INDEX 1 INTO DATA(WA_BWSD_LOGI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWSD_LOGI>-LOGGUID = 1.
<BWSD_LOGI>-OBJTP = 1.
<BWSD_LOGI>-OBJNM = 1.
<BWSD_LOGI>-OBJID = 1.
<BWSD_LOGI>-OBJREFNM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWSD_LOGI-OBJTP_O, sy-vline,
  WA_BWSD_LOGI-OBJNM_O, sy-vline,
  WA_BWSD_LOGI-OBJID_O, sy-vline,
  WA_BWSD_LOGI-OBJREFNM_O, sy-vline,
  WA_BWSD_LOGI-TRANSFERSTATE, sy-vline,
  WA_BWSD_LOGI-STATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWSD_LOGI 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_BWSD_LOGI 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_BWSD_LOGI INTO WA_BWSD_LOGI.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_BWSD_LOGI_STR, 
LOGGUID TYPE STRING,
OBJTP TYPE STRING,
OBJNM TYPE STRING,
OBJID TYPE STRING,
OBJREFNM TYPE STRING,
OBJTP_O TYPE STRING,
OBJNM_O TYPE STRING,
OBJID_O TYPE STRING,
OBJREFNM_O TYPE STRING,
TRANSFERSTATE TYPE STRING,
STATE TYPE STRING,
STARTTIME TYPE STRING,
RUNTIME TYPE STRING,
SOURCEDEST TYPE STRING,
ITEMSID TYPE STRING,
SOBJSID TYPE STRING,
POSINO TYPE STRING,
MSIZE TYPE STRING,
RECORDS TYPE STRING,
BLOCKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWSD_LOGI_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_BWSD_LOGI_STR-LOGGUID sy-vline 
WA_BWSD_LOGI_STR-OBJTP sy-vline 
WA_BWSD_LOGI_STR-OBJNM sy-vline 
WA_BWSD_LOGI_STR-OBJID sy-vline 
WA_BWSD_LOGI_STR-OBJREFNM sy-vline 
WA_BWSD_LOGI_STR-OBJTP_O sy-vline 
WA_BWSD_LOGI_STR-OBJNM_O sy-vline 
WA_BWSD_LOGI_STR-OBJID_O sy-vline 
WA_BWSD_LOGI_STR-OBJREFNM_O sy-vline 
WA_BWSD_LOGI_STR-TRANSFERSTATE sy-vline 
WA_BWSD_LOGI_STR-STATE sy-vline 
WA_BWSD_LOGI_STR-STARTTIME sy-vline 
WA_BWSD_LOGI_STR-RUNTIME sy-vline 
WA_BWSD_LOGI_STR-SOURCEDEST sy-vline 
WA_BWSD_LOGI_STR-ITEMSID sy-vline 
WA_BWSD_LOGI_STR-SOBJSID sy-vline 
WA_BWSD_LOGI_STR-POSINO sy-vline 
WA_BWSD_LOGI_STR-MSIZE sy-vline 
WA_BWSD_LOGI_STR-RECORDS sy-vline 
WA_BWSD_LOGI_STR-BLOCKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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