Hi,
I found the point. The auto_commit flag and jdbc connection pool is some of problem and the current_timestamp is not a now() meanful function. I have to use the CAST(timeofday() as timestamp) to.
I refer to the http://archives.postgresql.org/pgsql-jdbc/2006-08/msg00063.php.
Thanks.
Regards, Steve Yao
在2007-01-17，"Tom Lane"
Richard Huxton <dev@xxxxxxxxxxxx> writes: > The time is fixed at the start of the transaction. This lets you do > several inserts having the same timestamp. I think there's another problem here, which is that he's declared "currenttime" as a timestamp without time zone, but the CURRENT_TIMESTAMP function yields timestamp with time zone, meaning there's a TimeZone-dependent conversion going on. It sounds to me like there's a difference between the TimeZone setting between his web app and his psql, leading to an hour's offset, plus a smaller offset having to do with time-since-transaction-start. > See here for details of timeofday() etc. > http://www.postgresql.org/docs/8.2/static/functions-datetime.html#FUNCTIONS-DATETIME-CURRENT And read the preceding chapter's discussion of the different datetime data types. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
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