Re: automatic undo mysteries

Hi,
   
  I believe this is bug 3130630 which is closed as a dup of 3060261

  To confirm the above please do the following
   
  In one session
   
  create a table called test and insert some data

SQL> begin
for i in 1..10000
loop
insert into test values(i);
end loop;
end; 
  /
   
  In another session check the start_time for the above txn.
  
SQL> select start_time,to_char(sysdate,'mm/dd/yy hh24:mi:ss')
from v$transaction
where to_date(start_time,'mm/dd/yy hh24:mi:ss') > sysdate;

SQL> /
START_TIME TO_CHAR(SYSDATE,'
-------------------- -----------------
11/24/05 08:52:02 11/24/05 08:51:31
   
  If the start_time of the txn is > than the sysdate it is the same issue.
   
  Regards,
  Fairlie Rego
  


amit.poddar@xxxxxxxx wrote:
  Hi,

Please look at the alert log error I got

It shows ORA-01555 but the query duration is 0 seconds. How is that
possible that query goe the error just after starting

this is Oracle 9.2.0.5 running with automatic undo with undo_retention
= 36000

ORA-01555 caused by SQL statement below (Query Duration=0 sec, SCN:
0x000c.46f0197a):
Sat Nov 26 01:01:32 2005
SELECT
"EFFECTIVE_START_DATE","EFFECTIVE_END_DATE","POSITION_ID","ASSIGNMENT_STATUS_TYPE_ID","PERSON_ID","ORGANIZATION_ID","ASS_ATTRIBUTE9","A
SS_ATTRIBUTE16" FROM "HR"."PER_ALL_ASSIGNMENTS_F" "AL1" WHERE
"EFFECTIVE_END_DATE">=:1 AND "EFFECTIVE_START_DATE"<=:2 AND
"ASS_ATTRIBUTE9" LIK
E 'CRN%' AND
(TO_DATE(SUBSTR("ASS_ATTRIBUTE16",1,10),'YYYY/MM/DD')>TO_DATE('16-FEB-'||TO_CHAR(:3,'YYYY'),'DD-MON-YYYY')
AND TO_DATE(SUBSTR("AS
S_ATTRIBUTE16",1,10),'YYYY/MM/DD')<=TO_DATE('31-MAY-'||TO_CHAR(:4,'YYYY'),'DD-MON-YYYY')
OR TO_DATE(SUBSTR("ASS_ATTRIBUTE16",1,10),'YYYY/MM/DD
')>TO_DATE('01-OCT-'||TO_CHAR(:5,'YYYY'),'DD-MON-YYYY') AND
TO_DATE(SUBSTR("ASS_ATTRIBUTE16",1,10),'YYYY/MM/DD')<=TO_DATE('15-JAN-'||TO_CHAR(T
O_NUMBER(TO_CHAR(:6,'YYYY'))+1),'DD-MON-YYYY'))
Sat Nov 26 01:31:30 2005

I also checked stats$undostat that shows ssolderrcnt as 1 for the time
interval

but it shows 0 for both for all others block resue and steal counts.

So why is the query getting snapshot tool old.

Could any out guys could clarify my confustion

thanks
amit
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Fairlie Rego
Senior Oracle Consultant
Optus Telecommunications
www.optus.com.au
Mobile: +61 4 02 792 405
Home: +61 2 8920 0273

 
When I read about the evils of drinking, I gave up reading.






                
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