PK with TIMESTAMP causes insert unique constraint error at DST switch

Hi,
I have a test that inserts rows in a table that has a TIMESTAMP in its PK.
When inserting rows that cross over the November DST change, it tries to insert these dates:
--- Sun Nov 02 02:00:00 EST 2008
--- Sun Nov 02 01:00:00 EST 2008
--- Sun Nov 02 01:00:00 EDT 2008
This is the output of 3 different UTC dates. We can see that there are 2 x 1am, but they differ in their DST. They are really 3 different UTC dates.
But I get this error:
--- Expected error: ORA-00001: unique constraint (DDLTEST1.SYS_C00142622) violated
But I can get around that error and can insert these same dates if I set my JVM to UTC. The inserts work so I suspect this to be a JDBC issue.
I am using the Oracle Thin driver in a spring app:
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:@localhost:db" />
I can post the sample code but wonder if there is an obvious answer to this.
Note that MySql had the same problem. I fixed it by specifying the UTC timezone in the connection string, like this:
jdbc:mysql://[host]/[db]?useLegacyDatetimeCode=false&useTimezone=true&sessionVariables=time_zone='UTC'
Any idea how to get around that problem without setting JVM to UTC ?
Claude
Edited by: user2678899 on 10 juin 2009 10:09
I removed #2 work around which was wrong
Edited by: user2678899 on 10 juin 2009 10:23

Timur Akhmadeev wrote:
Hi,
I suspect this to be a JDBC issue.Nope, this is your schema design gap. It breaks the main principle of PK: to uniquely identify a row in a table always. Your PK doesn't satisfy it, since it depends on client's settings.Why is setting the JVM to UTC working ? This is the part that confuses me.
I create the 3 dates in Eastern time, then change the JVM default to UTC: the 3 inserts work.
I create the 3 dates in Eastern time, then leave the JVM to Eastern time , the 3rd insert gets the unique constraint error.
To me, the PK principle is not broken: these are 3 different UTC dates.

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Message was edited by:
user507290

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ORA-00001: unique constraint (MICHAELKELLY.SYS_C00210356) violatedMessage was edited by:
Mike1981
Message was edited by:
Mike1981

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Rollback complete.

Unique Constraint error while executing statspack.snap procedure

The following is the error which popped up when i was trying to execute statspack.snap procedure from perfstat user:
ORA-00001: unique constraint (PERFSTAT.STATS$LATCH_CHILDREN_PK) violated
ORA-06512: at "PERFSTAT.STATSPACK", line 1619
ORA-06512: at "PERFSTAT.STATSPACK", line 71
ORA-06512: at line 1
How could i resolve such a problem, as all the constraints and objects for this user are created while running the oracle supplied script 'spcreate.sql'.
If any 1 knows how to handle such a situation , can come forward n please help me out.

SQL> execute statspack.snap (i_snap_level=>10);
ERROR at line 1:
ORA-00001: unique constraint (PERFSTAT.STATS$LATCH_CHILDREN_PK) violated
ORA-06512: at "PERFSTAT.STATSPACK", line 1619
ORA-06512: at "PERFSTAT.STATSPACK", line 71
ORA-06512: at line 1
Cause
-- Its because of the bug # 2384758.
"STATSPACK.SNAP GIVES ORA-1 ON STATS$LATCH_CHILDREN_PK WHEN I_SNAP_LEVEL=>10"
-- The STATS$LATCH_CHILDREN table has a primary key constraint on (snap_id, dbid, instance_number, latch#, child#).
Fix
-- This is fixed in 9.0.2 and will not be backported to earlier versions because the level 10 is not a normal level to be setting unless requested by oracle support.

PK with TIMESTAMP causes insert unique constraint error at DST switch

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