From: | Francisco Leovey <fleovey(at)yahoo(dot)com> |
---|---|
To: | c(dot)frank(at)gmail(dot)com |
Cc: | pgsql-novice(at)postgresql(dot)org |
Subject: | Re: Bug - DatabaseMetaData.getCatalogs() was [Novice] Can't get list of databases with \list |
Date: | 2009-11-03 17:57:42 |
Message-ID: | 812700.61747.qm@web51704.mail.re2.yahoo.com |
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Thread: | |
Lists: | pgsql-jdbc pgsql-novice |
A simple query
select datname from pg_database
will return all the database names
--- On Tue, 11/3/09, Richard Broersma <richard(dot)broersma(at)gmail(dot)com> wrote:
From: Richard Broersma <richard(dot)broersma(at)gmail(dot)com>
Subject: [NOVICE] Bug - DatabaseMetaData.getCatalogs() was [Novice] Can't get list of databases with \list
To: "Christopher Frank" <c(dot)frank(at)gmail(dot)com>
Cc: pgsql-novice(at)postgresql(dot)org, "pgsql-jdbc" <pgsql-jdbc(at)postgresql(dot)org>
Date: Tuesday, November 3, 2009, 3:36 PM
On Mon, Nov 2, 2009 at 1:05 PM, Christopher Frank <c(dot)frank(at)gmail(dot)com> wrote:
>> > As for JDBC, there may be something that gives equivalent information,
>> > but I
>> > couldn't find it.
>>
>> http://java.sun.com/javase/6/docs/api/java/sql/DatabaseMetaData.html
>>
>> getCatalogs()
> I had tried that but it only returned one database, the database to which I
> was already connected. There should have been 3 others.
I verified that the DatabaseMetaData.getCatalogs() only returns a
ResultSet with the currently connect database rather than all of the
databases in the PostgreSQL cluster.
I see there was a previous discussion on this topic, stating that
Databases and Catalogs are not the same, so only returning the
currently connected database is correct:
http://archives.postgresql.org/pgsql-jdbc/2007-02/msg00112.php
However, calling the DatabaseMetaData.getCatalogTerm() function states
that the PostgreSQL's equivalent to a Catalog is a "database". For
this reason, it seems reasonable to me that getCatalogs() should
return a listing off all PostgreSQL databases.
If one really only wants the currently connected database,
Connection.getCatalog() will suffice.
--
Regards,
Richard Broersma Jr.
Visit the Los Angeles PostgreSQL Users Group (LAPUG)
http://pugs.postgresql.org/lapug
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