Обсуждение: intervals and jdbc
If I try to get an interval from postgres via jdbc I get:
No class found for interval
at
org.postgresql.jdbc1.AbstractJdbc1Connection.getObject(AbstractJdbc1Connection.java:693)
at
org.postgresql.jdbc2.AbstractJdbc2Connection.getObject(AbstractJdbc2Connection.java:117)
at
org.postgresql.jdbc2.AbstractJdbc2ResultSet.getObject(AbstractJdbc2ResultSet.java:147)
Why can't the interval just be returned as a String?
Joseph, Can you send me a test case to demonstrate what you are trying to do? Dave On Thu, 2002-12-05 at 21:45, Joseph Shraibman wrote: > If I try to get an interval from postgres via jdbc I get: > > No class found for interval > at > org.postgresql.jdbc1.AbstractJdbc1Connection.getObject(AbstractJdbc1Connection.java:693) > at > org.postgresql.jdbc2.AbstractJdbc2Connection.getObject(AbstractJdbc2Connection.java:117) > at > org.postgresql.jdbc2.AbstractJdbc2ResultSet.getObject(AbstractJdbc2ResultSet.java:147) > > Why can't the interval just be returned as a String? > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/users-lounge/docs/faq.html -- Dave Cramer <Dave@micro-automation.net>
Try this: select current_timestamp - '2002-12-05 22:14'::timestamp; Dave Cramer wrote: > Joseph, > > Can you send me a test case to demonstrate what you are trying to do? > > Dave > On Thu, 2002-12-05 at 21:45, Joseph Shraibman wrote: > >>If I try to get an interval from postgres via jdbc I get: >> >>No class found for interval >> at >>org.postgresql.jdbc1.AbstractJdbc1Connection.getObject(AbstractJdbc1Connection.java:693) >> at >>org.postgresql.jdbc2.AbstractJdbc2Connection.getObject(AbstractJdbc2Connection.java:117) >> at >>org.postgresql.jdbc2.AbstractJdbc2ResultSet.getObject(AbstractJdbc2ResultSet.java:147) >> >>Why can't the interval just be returned as a String? >> >> >>---------------------------(end of broadcast)--------------------------- >>TIP 5: Have you checked our extensive FAQ? >> >>http://www.postgresql.org/users-lounge/docs/faq.html -- Joseph Shraibman joseph@xtenit.com Increase signal to noise ratio. http://xis.xtenit.com
Joseph, What do you want it to return, postgres is assuming you want an interval, but there is no jdbc interval type. What are you expecting it to return? Dave On Thu, 2002-12-05 at 22:15, Joseph Shraibman wrote: > Try this: > select current_timestamp - '2002-12-05 22:14'::timestamp; > > Dave Cramer wrote: > > Joseph, > > > > Can you send me a test case to demonstrate what you are trying to do? > > > > Dave > > On Thu, 2002-12-05 at 21:45, Joseph Shraibman wrote: > > > >>If I try to get an interval from postgres via jdbc I get: > >> > >>No class found for interval > >> at > >>org.postgresql.jdbc1.AbstractJdbc1Connection.getObject(AbstractJdbc1Connection.java:693) > >> at > >>org.postgresql.jdbc2.AbstractJdbc2Connection.getObject(AbstractJdbc2Connection.java:117) > >> at > >>org.postgresql.jdbc2.AbstractJdbc2ResultSet.getObject(AbstractJdbc2ResultSet.java:147) > >> > >>Why can't the interval just be returned as a String? > >> > >> > >>---------------------------(end of broadcast)--------------------------- > >>TIP 5: Have you checked our extensive FAQ? > >> > >>http://www.postgresql.org/users-lounge/docs/faq.html -- Dave Cramer <Dave@micro-automation.net>
Dave Cramer wrote: > Joseph, > > What do you want it to return, postgres is assuming you want an > interval, but there is no jdbc interval type. What are you expecting it > to return? > I was expecting a String. I had to explicity cast it to text to get it to work.
Really, why a string, I would expect a timestamp, a time, or a date. ideally this should return a timestamp, as both sides are a timestamp. Dave On Thu, 2002-12-05 at 22:29, Joseph Shraibman wrote: > Dave Cramer wrote: > > Joseph, > > > > What do you want it to return, postgres is assuming you want an > > interval, but there is no jdbc interval type. What are you expecting it > > to return? > > > I was expecting a String. I had to explicity cast it to text to get it to work. -- Dave Cramer <Dave@micro-automation.net>