Обсуждение: Re: [INTERFACES] Postgresql and JDBC

Quoting Wayne Johnson <wdtj@yahoo.com>:

> I've got some questions on using POSTGRESQL with JDBC.  Some folks on
> the
> Novice mailing list suggested I use the interfaces mailing list, but
> the
> web site suggests that I should use another.  Which mailing list is
> appropriate.

pgsql-jdbc@postgresql.org - its a new list created due to the ammount of
traffic.

I've got to update the jdbc pages this week.

> I would like to do a read & update of a single record.  I've seen
> several
> examples of using JDBC to update an entire table, but I'm only looking
> to
> modify a single record.

Standard SQL, ie UPDATE table SET col=value WHERE keycol=keyvalue;

Then use executeUpdate() from within Statement.

The basic example in the source included this.

>
> Is this a case where I should use getCursorName?  How do I then do an
> UPDATE to only modify that single record?  Is this multi user safe?

No, cursors are mainly used to manage large result sets.

> I've
> tried the JDBC 2.0 updateXXX functions, but they are apparently not
> implemented for Postgresql yet.

No. UpdateableResultSet is not yet available (partly done), and you can't
guarantee it working on all ResultSet's anyhow (see the JDBC2.0 specs).

>
> Are there any good (in depth) examples of JDBC out there?  The only
> ones
> I've seen are limited to a simple SELECT or UPDATE.

The source has some (src/interfaces/jdbc/example)

Peter

--
Peter Mount peter@retep.org.uk
PostgreSQL JDBC Driver: http://www.retep.org.uk/postgres/
RetepPDF PDF library for Java: http://www.retep.org.uk/pdf/

[ Charset ISO-8859-1 unsupported, converting... ]
> Quoting Wayne Johnson <wdtj@yahoo.com>:
>
> > I've got some questions on using POSTGRESQL with JDBC.  Some folks on
> > the
> > Novice mailing list suggested I use the interfaces mailing list, but
> > the
> > web site suggests that I should use another.  Which mailing list is
> > appropriate.
>
> pgsql-jdbc@postgresql.org - its a new list created due to the ammount of
> traffic.
>
> I've got to update the jdbc pages this week.


PostgreSQL.org web site is already update.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

At 11:51 30/01/01 -0500, Bruce Momjian wrote:
>[ Charset ISO-8859-1 unsupported, converting... ]
> > Quoting Wayne Johnson <wdtj@yahoo.com>:
> >
> > > I've got some questions on using POSTGRESQL with JDBC.  Some folks on
> > > the
> > > Novice mailing list suggested I use the interfaces mailing list, but
> > > the
> > > web site suggests that I should use another.  Which mailing list is
> > > appropriate.
> >
> > pgsql-jdbc@postgresql.org - its a new list created due to the ammount of
> > traffic.
> >
> > I've got to update the jdbc pages this week.
>
>
>PostgreSQL.org web site is already update.


Yes, but jdbc.postgresql.org isn't ;-)


>--
>   Bruce Momjian                        |  http://candle.pha.pa.us
>   pgman@candle.pha.pa.us               |  (610) 853-3000
>   +  If your life is a hard drive,     |  830 Blythe Avenue
>   +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026