OERR – In search of Error Messages/Events

Sometimes you want to search for Oracle database messages, their meaning or you are in search of specific database event settings.

For instance, a long time ago i was searching for an event that would trace when an datafile would expand / autoextend. I encountered latching problems on a Siebel system based on an new Oracle Failsafe environment (Windows 2000 cluster). I wanted to be sure that these latching problems weren’t introduced by the newly introduced datafile AUTOEXTEND feature.

So i put in a TAR on metalink with the request if there was a way to trace, eq. an event setting, when a datafile extended. This way i could cross-reference this timestamp to the timestamps i was registering my latch problems. The reponse took a long time. I was in need for an answer, so i created a workaround via a PL/SQL procedure. This procedure was executed via the database job scheduler. Every time a datafile extended, the timestamp, SCN, extend growth etc. was picked up by this procedure, and the data was stored in a table.

Lately i am in search of XML DB knowledge, more specific, DBA/database specific XML DB knowledge (object performance/sizing/XML Schema tuning, etc. stuff). In the new Oracle 10g Release 2 manuals, i came across the event setting 31098: “Internal event to turn on XDB tracing”. So i wondered if there were more of these settings. Apparently this setting wasalready applicable in Oracle 10g Release 1.

I have a small script called OERR, like the Oracle message utility under UNIX. It does the following:

 
SQL> @oerr 31098
 
Error 31098 IS: ORA-31098: Internal event TO turn ON XDB tracing

The SQL code for this script:

prompt
 
SET serveroutput ON SIZE 1000000
 
SET feedback off
 
EXEC dbms_output.put_line('Error ' || &&1 || ' is: ' ||sqlerrm(-1 * &&1));
 
prompt
 
undefine 1
 
SET feedback ON

Wondering if i couldn’t do more with this, when using it with Oracle collections, i came up with the following:

 
SQL> @search_oerr
 
Enter string TO SEARCH: XDB
 
 
RESULT:
 
ORA-31000: Resource '' IS NOT an XDB schema document
ORA-31004: LENGTH  OF the BLOB IN XDB$H_INDEX IS below the minimum
ORA-31098: Internal event TO turn ON XDB tracing
ORA-31099: XDB Security Internal Error
ORA-31100: XDB Locking Internal Error
ORA-31112: fail TO  FOR  port USING xdb configuration
ORA-31113: XDB configuration may NOT be updated WITH non-schema compliant DATA
ORA-31114: XDB configuration has been deleted OR IS corrupted
ORA-31115: XDB configuration error:
ORA-31153: Cannot CREATE schema URL WITH reserved prefix 'http://xmlns.oracle.com/xdb/schemas/'
ORA-31155: attribute  NOT IN XDB namespace
ORA-31179: internal XDB event FOR ftp test harness
 
 
12 ROWS selected OF 59989 records
 
PL/SQL PROCEDURE successfully completed.

The SQL statements for this report are:

 
-- Find certain events or error numbers
 
SET serveroutput ON SIZE 1000000
SET array 1
SET long 10000
SET trimspool ON
prompt
accept XXX CHAR prompt 'Enter string to search: '
 
DECLARE
 
TYPE statement IS RECORD
(r_statement varchar2(1000));
 
TYPE statement_stack IS TABLE OF statement
INDEX BY binary_integer;
 
showstring statement_stack;
t NUMBER:=0;
 
BEGIN
  dbms_output.put_line(chr(10));
  dbms_output.put_line('RESULT: '||chr(10));
  showstring.DELETE;
  FOR i IN 0..60000 loop
     showstring(i).r_statement := (sqlerrm(-1 * i));
     IF UPPER(showstring(i).r_statement) LIKE UPPER('% &&XXX %')
     THEN
        dbms_output.put_line(showstring(i).r_statement);
        t:=nvl(t,0)+1;
     ELSE
        NULL; --> you should replace this with some usefull code
     END IF;
  END loop;
  dbms_output.put_line(chr(10));
  IF t=0 THEN --> just for fun
     dbms_output.put_line('no rows selected');
  elsif t=1 
  THEN
    dbms_output.put_line('1 row selected');
  ELSE
    dbms_output.put_line(t||' rows selected of '||(showstring.COUNT-t)||' records');
  END IF;
END;
/
 
undefine XXX

I hope you can use it. I know it’s not hightech but just like the old “Tales from the script” SQL scripts on Metalink (it’s still there), it’s a starting point for further improvement.

;-)

m4s0n501
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