From: | Lukas Eder <lukas(dot)eder(at)gmail(dot)com> |
---|---|
To: | pgsql-jdbc(at)postgresql(dot)org |
Subject: | java.sql.ResultSet.getTime() returns wrong time |
Date: | 2010-09-19 13:16:57 |
Message-ID: | AANLkTinN6yX+=Wz+iZzsnWZhp4+bNfA7uRB+RoHsyoof@mail.gmail.com |
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Lists: | pgsql-jdbc |
I have experienced a very peculiar issue with the postgresql JDBC driver
when calling java.sql.ResultSet.getTime() or getTimestamp() on a field of
type timetz.
Here is how to reproduce the issue:
1. Set date and time to 2010-09-19 14:57:00 CEST (central european summer
time: UTC+2) or something similar
2. Fetch "SELECT current_time" from the Postgres database directly. This
will return the correct time, e.g "14:57:17.116452+02"
3. Fetch "SELECT current_time" from the Postgres JDBC driver. This will
return a wrong time, e.g 13:57:17
After some debugging, I found out that in TimestampUtils.toTime(Calendar,
String), the date is zeroed out, i.e. 2010-09-19 is turned into 1970-01-01.
Of course, January 1 is CET (UTC+1) and not CEST (UTC+2), which explains the
result being one hour off. Since I'm requesting the current time on a day in
September, I would expect to receive the time as it is displayed in summer
time, and not on any arbitrary day in the past. I found some similar bug
reports on your archive with no solution yet, e.g.:
http://archives.postgresql.org/pgsql-jdbc/2010-05/msg00041.php
Cheers,
Lukas
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