Обсуждение: Create a new database from JDBC?
How do I make a connection to a Postgresql database that (potentially) has 0 databases from jdbc, so that I can issue a create database command? In that _other_ database, I can make a jdbc connection to an address like this: jdbc:mysql://servername/ And then issue a "Create database foo" command. Then I can reconnect to jdbc:mysql://servername/foo And everything is good. If I try to connect to a postgresql database like this: jdbc:postgresql://servername/ Postgres attempts to connect to a database that is named the same as the username I provided. Certainly not what I want, since that database doesn't exist. Is there a system database I could always count on being available that I could connect to? Thanks, Dan -- **************************** Daniel Armbrust Biomedical Informatics Mayo Clinic Rochester daniel.armbrust(at)mayo.edu http://informatics.mayo.edu/
Dan Armbrust wrote: > How do I make a connection to a Postgresql database that (potentially) > has 0 databases from jdbc, so that I can issue a create database command? > > In that _other_ database, I can make a jdbc connection to an address > like this: > > jdbc:mysql://servername/ > > And then issue a "Create database foo" command. > > Then I can reconnect to > jdbc:mysql://servername/foo > > And everything is good. > > If I try to connect to a postgresql database like this: > > jdbc:postgresql://servername/ > > Postgres attempts to connect to a database that is named the same as > the username I provided. > > Certainly not what I want, since that database doesn't exist. Is > there a system database I could always count on being available that I > could connect to? template1 but only if you allow it from pg_hba.conf. > > Thanks, > > Dan >
On 8/2/06 17:26, "Joshua D. Drake" <jd@commandprompt.com> wrote: >> Certainly not what I want, since that database doesn't exist. Is >> there a system database I could always count on being available that I >> could connect to? > > template1 but only if you allow it from pg_hba.conf. The postgres database would be more appropriate on 8.1+ (it is specifically inteded for that kind of thing), however like template1, it can be dropped, though that isn't advisable without good reason. Regards, Dave.
Dave Page wrote: > > > On 8/2/06 17:26, "Joshua D. Drake" <jd@commandprompt.com> wrote: > >>> Certainly not what I want, since that database doesn't exist. Is >>> there a system database I could always count on being available that I >>> could connect to? >> template1 but only if you allow it from pg_hba.conf. > > The postgres database would be more appropriate on 8.1+ (it is specifically > inteded for that kind of thing), however like template1, it can be dropped, > though that isn't advisable without good reason. > > Regards, Dave. > > So there is no guaranteed way to do this, unless there is a known, existing database? Seems like a shortcoming, to me. Would this be considered as a feature request, or does the current design make it to difficult to implement? Dan -- **************************** Daniel Armbrust Biomedical Informatics Mayo Clinic Rochester daniel.armbrust(at)mayo.edu http://informatics.mayo.edu/