alert log in xml format
April 12th, 2008
The alert log is in xml format in Oracle 11g. If you want to parse the content of the file and use the XML functions to retrieve the data, you can use this way :
SQL> create or replace directory alert as
2 '/app/oracle/diag/rdbms/lsc01/lsc01/alert';
Directory created.
SQL> var c clob
SQL> declare
2 b bfile := bfilename('ALERT','log.xml');
3 begin
4 dbms_lob.open(b,dbms_lob.file_readonly);
5 dbms_lob.createtemporary(:c,true);
6 dbms_lob.loadfromfile(:c,b,dbms_lob.lobmaxsize);
7 end;
8 /
PL/SQL procedure successfully completed.
SQL> select extractvalue(xmlparse(content :c),
2 '/msg[@time="2008-03-30T01:01:13.704+01:00"]/txt/text()')
3 from dual;
EXTRACTVALUE(XMLPARSE(CONTENT:C),'/MSG[@TIME="2008-03-30T01:01:1
----------------------------------------------------------------
Starting ORACLE instance (normal)
Damn, you were faster then me (but as always your stuff is more fancy) !
Grz
Marco
thanks, the idea of using bfile came by reading your site, however as it is not a wellformed document I could not use XMLTYPE(bfile) so I searched for something else
I got the idea - again - after readin Christo’s http://www.pythian.com/blogs/902/how-to-make-an-in-database-listenerlog-file
But stressed for time I didn’t came to it…
What about a nested
and /or using xmlconact instead of ||
and / or have a look at
http://forums.oracle.com/forums/thread.jspa?threadID=640934&tstart=0
but be aware of Mark’s last remark.
the ‘ ‘ should be [root] and a [/root], but then not squared brackets but the bigger and smaller signs used in tags.
I just activate the Live Preview on the comments!
I mean I like
xmltype(bfilename(…))
but it works only with documents, so I could not write a zero plsql solution
and xmltype(bfilename(),wellformed=>1) does not work with not well formed documents
The problem is that the log file is officially not a wellformed xml document. A wellformed xml document needs a root element. Sorry for the delay, I just played second player in mario Galaxy.
I send you an email with the internediate results…
I just beaten final boss in medium level in guitar heroes…
If you start digging, sometimes you will find things useful…
And a digger he is: http://blog.tanelpoder.com/2009/03/21/oracle-11g-reading-alert-log-via-sql/
Can it be more simple
oh yes!!!