stevegy@126.com wrote:
> For example, the machine time is 11:46:xx, and I execute the SQL insert through the jdbc, the record time will be
changedto 10:52:xx. I mean the time value is always slower than the machine time but not for a fixed time period.
>
> My java appserver is Sun Java appserver platform 8.2. The jdbc driver is postgresql-8.1-408.jdbc3.jar.
>
> I guess the problem may be the db connection or the connection pool. But not sure, and I tested other web java
applicationon the same machine and same software but not DOMAIN data type on column, that has no such error. So, I
modifythe column to native data type: 'timestamp', but the error is still there.
>
> Anyone can help me? Thanks.
This one catches a lot of people first time they see it.
The time is fixed at the start of the transaction. This lets you do
several inserts having the same timestamp.
See here for details of timeofday() etc.
http://www.postgresql.org/docs/8.2/static/functions-datetime.html#FUNCTIONS-DATETIME-CURRENT
--
Richard Huxton
Archonet Ltd