Re: PreparedStatment.setBinaryStream()

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: bjordan(at)ie3ventures(dot)com
Cc: pgsql-jdbc(at)postgresql(dot)org
Subject: Re: PreparedStatment.setBinaryStream()
Date: 2001-05-24 20:42:33
Message-ID: 200105242042.f4OKgXr29231@candle.pha.pa.us
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Yes, known bug, fixed in current cvs. Jar files at:

http://jdbc.fastcrypt.com

[ Charset ISO-8859-1 unsupported, converting... ]
> I was wondering if anyone had any insight to a problem I am having with the
> setBinaryStream() function call. I am using Postgresql 7.1.1 running under
> Win 2000 via the Cygnus environment. The JDBC driver is also version 7.1.1
> (Enterprise) successfully compiled from the latest source available via
> postgresql.org. I am using JDK 1.3.1.
>
> I am attempting to place binary data into the database to include images and
> serialized data. I ran through the image and blob tests in the "example"
> package for the driver and was able to successfully insert and remove images
> and blobs from the database. However, I am unable to insert binary data
> into the database via the setBinaryStream() function. I am required to use
> this method because a third-party component uses this method and I have no
> way to alter the code.
>
> I have traced the problem through to the
> org.postgresql.fastpath.Fastpath.fastpath() method. When the stream that is
> created in PreparedStatement.setBinaryStream() is closed, the
>
> fastpath(int fnid,boolean resulttype,FastpathArg[] args)
>
> method gets called to execute the lo_write function that writes the data
> into the database of the pg_largeobject table and write the OID into my
> table as a pointer to the data. When this occurs, the backend returns 69 to
> indicate an error and the fastpath() method throws an exception --
>
> // Error message returned
> case 'E':
> throw new
> PSQLException("postgresql.fp.error",stream.ReceiveString(4096));
>
> The debug output from the console where Postgresql is running displays the
> following:
>
> lo_write: invalid large object descriptor (0)
>
> Is there something that I am missing here or is this a bug? Really
> appreciate any thoughts on what is causing the problem and how to correct
> it.
>
> Finally, does anyone know where I can pull down the very latest version of
> the patched source code? I see references in the discussion to patches
> being applied and wanted to make sure that I had them to update the source
> or get the latest patched source.
>
> Thanks
>
> Brian Jordan

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--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
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