Inconsistency between timezones

[Manoj Ganesan]

Hi,

I am confused about how the driver interprets (if at all it does) timezones to and from the database. When I run the following queries directly on the database, these are the results I receive:

query: select clock_timestamp() + interval '15 hours'
result: "2009-09-16 06:06:33.801-05"

query: select date_trunc('day', clock_timestamp() + interval '15 hours')   
result: "2009-09-16 00:00:00-05"

The above are the values I would expect as well. However, when I run the same two queries (immediately after) from Java (via the JDBC driver), these are the results:

query: select clock_timestamp() + interval '15 hours'
result: "2009-09-16 06:08:44.751"

query: select date_trunc('day', clock_timestamp() + interval '15 hours')   
result: "2009-09-15 19:00:00.0"

As you can see, the first query yields the *expected* results. However, the second result seems to have seen some timezone conversion from GMT to Central Time somewhere. I would assume that clock_timestamp() used inside a function, or outside a function should show similar results. Replacing clock_timestamp() with current_timestamp gives the same results. Am I missing something here?

JDBC driver version: 8.1.404
Server version: 8.3

Thanks a bunch,
Manoj

[Oliver Jowett]

Manoj Ganesan wrote:

> I am confused about how the driver interprets (if at all it does)
> timezones to and from the database.

> JDBC driver version: 8.1.404

That's a pretty old driver. Try upgrading and see if the problem persists.

If you still have problems, then please send through a selfcontained
testcase that shows the problem. Timestamp-related problems usually
depend a lot on the exact datatypes and queries involved, and the exact
JDBC calls that you make.

-O

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