ABAP Select data from SAP table DB6_VIEW_LOGHIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6_VIEW_LOGHIST 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 DB6_VIEW_LOGHIST. 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 DB6_VIEW_LOGHIST 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_DB6_VIEW_LOGHIST TYPE STANDARD TABLE OF DB6_VIEW_LOGHIST,
      WA_DB6_VIEW_LOGHIST TYPE DB6_VIEW_LOGHIST,
      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: <DB6_VIEW_LOGHIST> TYPE DB6_VIEW_LOGHIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6_VIEW_LOGHIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6_VIEW_LOGHIST
  INTO TABLE IT_DB6_VIEW_LOGHIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6_VIEW_LOGHIST
*  INTO TABLE @DATA(IT_DB6_VIEW_LOGHIST2).
*--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_DB6_VIEW_LOGHIST INDEX 1 INTO DATA(WA_DB6_VIEW_LOGHIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6_VIEW_LOGHIST ASSIGNING <DB6_VIEW_LOGHIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6_VIEW_LOGHIST>-LOGMSGS = 1.
<DB6_VIEW_LOGHIST>-CUR_LOGMSG = 1.
<DB6_VIEW_LOGHIST>-FACILITY = 1.
<DB6_VIEW_LOGHIST>-RECTYPE = 1.
<DB6_VIEW_LOGHIST>-TIMESTAMP = 1.

ENDLOOP.

LOOP AT IT_DB6_VIEW_LOGHIST INTO WA_DB6_VIEW_LOGHIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6_VIEW_LOGHIST-TIMEZONE, sy-vline,
  WA_DB6_VIEW_LOGHIST-INSTANCENAME, sy-vline,
  WA_DB6_VIEW_LOGHIST-DBPARTITIONNUM, sy-vline,
  WA_DB6_VIEW_LOGHIST-LEVEL, sy-vline,
  WA_DB6_VIEW_LOGHIST-IMPACT, sy-vline,
  WA_DB6_VIEW_LOGHIST-DBNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6_VIEW_LOGHIST 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_DB6_VIEW_LOGHIST 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_DB6_VIEW_LOGHIST INTO WA_DB6_VIEW_LOGHIST.


*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_DB6_VIEW_LOGHIST_STR, 
LOGMSGS TYPE STRING,
CUR_LOGMSG TYPE STRING,
FACILITY TYPE STRING,
RECTYPE TYPE STRING,
TIMESTAMP TYPE STRING,
TIMEZONE TYPE STRING,
INSTANCENAME TYPE STRING,
DBPARTITIONNUM TYPE STRING,
LEVEL TYPE STRING,
IMPACT TYPE STRING,
DBNAME TYPE STRING,
EDU_ID TYPE STRING,
EDUNAME TYPE STRING,
PID TYPE STRING,
PROCESS_NAME TYPE STRING,
TID TYPE STRING,
APPLHANDLE TYPE STRING,
AUTH_ID TYPE STRING,
PRODUCT TYPE STRING,
COMPONENT TYPE STRING,
FUNCTION TYPE STRING,
PROBE TYPE STRING,
CALLEDPRODUCT TYPE STRING,
CALLEDCOMPONENT TYPE STRING,
CALLEDFUNCTION TYPE STRING,
OSERR TYPE STRING,
RETCODE TYPE STRING,
MSGNUM TYPE STRING,
MSGTYPE TYPE STRING,
MSG TYPE STRING,
OBJTYPE TYPE STRING,
OBJNAME TYPE STRING,
OBJNAME_QUALIFIER TYPE STRING,
EVENTTYPE TYPE STRING,
EVENTDESC TYPE STRING,
FIRST_EVENTQUALIFIERTYPE TYPE STRING,
FIRST_EVENTQUALIFIER TYPE STRING,
SECOND_EVENTQUALIFIERTYPE TYPE STRING,
SECOND_EVENTQUALIFIER TYPE STRING,
THIRD_EVENTQUALIFIERTYPE TYPE STRING,
THIRD_EVENTQUALIFIER TYPE STRING,
EVENTSTATE TYPE STRING,
EVENTATTRIBUTE TYPE STRING,
EVENTSTACK TYPE STRING,
CALLSTACK TYPE STRING,
DUMPFILE TYPE STRING,
FULLREC TYPE STRING,
ICON TYPE STRING,
DATE TYPE STRING,
TIME TYPE STRING,
BGCOLOR TYPE STRING,
MESSAGE_ID TYPE STRING,
CUR_FACILITY TYPE STRING,
FACILITIES TYPE STRING,
CUR_RECTYPE TYPE STRING,
RECTYPES TYPE STRING,
CUR_IMPACT TYPE STRING,
IMPACTS TYPE STRING,
DATE_FROM TYPE STRING,
TIME_FROM TYPE STRING,
DATE_TO TYPE STRING,
TIME_TO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6_VIEW_LOGHIST_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_DB6_VIEW_LOGHIST_STR-LOGMSGS sy-vline 
WA_DB6_VIEW_LOGHIST_STR-CUR_LOGMSG sy-vline 
WA_DB6_VIEW_LOGHIST_STR-FACILITY sy-vline 
WA_DB6_VIEW_LOGHIST_STR-RECTYPE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-TIMESTAMP sy-vline 
WA_DB6_VIEW_LOGHIST_STR-TIMEZONE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-INSTANCENAME sy-vline 
WA_DB6_VIEW_LOGHIST_STR-DBPARTITIONNUM sy-vline 
WA_DB6_VIEW_LOGHIST_STR-LEVEL sy-vline 
WA_DB6_VIEW_LOGHIST_STR-IMPACT sy-vline 
WA_DB6_VIEW_LOGHIST_STR-DBNAME sy-vline 
WA_DB6_VIEW_LOGHIST_STR-EDU_ID sy-vline 
WA_DB6_VIEW_LOGHIST_STR-EDUNAME sy-vline 
WA_DB6_VIEW_LOGHIST_STR-PID sy-vline 
WA_DB6_VIEW_LOGHIST_STR-PROCESS_NAME sy-vline 
WA_DB6_VIEW_LOGHIST_STR-TID sy-vline 
WA_DB6_VIEW_LOGHIST_STR-APPLHANDLE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-AUTH_ID sy-vline 
WA_DB6_VIEW_LOGHIST_STR-PRODUCT sy-vline 
WA_DB6_VIEW_LOGHIST_STR-COMPONENT sy-vline 
WA_DB6_VIEW_LOGHIST_STR-FUNCTION sy-vline 
WA_DB6_VIEW_LOGHIST_STR-PROBE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-CALLEDPRODUCT sy-vline 
WA_DB6_VIEW_LOGHIST_STR-CALLEDCOMPONENT sy-vline 
WA_DB6_VIEW_LOGHIST_STR-CALLEDFUNCTION sy-vline 
WA_DB6_VIEW_LOGHIST_STR-OSERR sy-vline 
WA_DB6_VIEW_LOGHIST_STR-RETCODE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-MSGNUM sy-vline 
WA_DB6_VIEW_LOGHIST_STR-MSGTYPE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-MSG sy-vline 
WA_DB6_VIEW_LOGHIST_STR-OBJTYPE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-OBJNAME sy-vline 
WA_DB6_VIEW_LOGHIST_STR-OBJNAME_QUALIFIER sy-vline 
WA_DB6_VIEW_LOGHIST_STR-EVENTTYPE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-EVENTDESC sy-vline 
WA_DB6_VIEW_LOGHIST_STR-FIRST_EVENTQUALIFIERTYPE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-FIRST_EVENTQUALIFIER sy-vline 
WA_DB6_VIEW_LOGHIST_STR-SECOND_EVENTQUALIFIERTYPE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-SECOND_EVENTQUALIFIER sy-vline 
WA_DB6_VIEW_LOGHIST_STR-THIRD_EVENTQUALIFIERTYPE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-THIRD_EVENTQUALIFIER sy-vline 
WA_DB6_VIEW_LOGHIST_STR-EVENTSTATE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-EVENTATTRIBUTE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-EVENTSTACK sy-vline 
WA_DB6_VIEW_LOGHIST_STR-CALLSTACK sy-vline 
WA_DB6_VIEW_LOGHIST_STR-DUMPFILE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-FULLREC sy-vline 
WA_DB6_VIEW_LOGHIST_STR-ICON sy-vline 
WA_DB6_VIEW_LOGHIST_STR-DATE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-TIME sy-vline 
WA_DB6_VIEW_LOGHIST_STR-BGCOLOR sy-vline 
WA_DB6_VIEW_LOGHIST_STR-MESSAGE_ID sy-vline 
WA_DB6_VIEW_LOGHIST_STR-CUR_FACILITY sy-vline 
WA_DB6_VIEW_LOGHIST_STR-FACILITIES sy-vline 
WA_DB6_VIEW_LOGHIST_STR-CUR_RECTYPE sy-vline 
WA_DB6_VIEW_LOGHIST_STR-RECTYPES sy-vline 
WA_DB6_VIEW_LOGHIST_STR-CUR_IMPACT sy-vline 
WA_DB6_VIEW_LOGHIST_STR-IMPACTS sy-vline 
WA_DB6_VIEW_LOGHIST_STR-DATE_FROM sy-vline 
WA_DB6_VIEW_LOGHIST_STR-TIME_FROM sy-vline 
WA_DB6_VIEW_LOGHIST_STR-DATE_TO sy-vline 
WA_DB6_VIEW_LOGHIST_STR-TIME_TO sy-vline      INTO ld_text SEPARATED BY SPACE.

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