R: Re: Import image into postgresql database

Thanks,

Francesco

>----Messaggio originale----
>Da: Gabriele(dot)Bartolini(at)2ndQuadrant(dot)it
>Data: 01/07/2011 12.27
>A: <francescoboccacci(at)libero(dot)it>
>Cc: <pgsql-admin(at)postgresql(dot)org>
>Ogg: Re: [ADMIN] Import image into postgresql database
>
> Ciao Francesco,
>
> On Fri, 1 Jul 2011 12:13:33 +0200 (CEST), "francescoboccacci(at)libero(dot)it"
> <francescoboccacci(at)libero(dot)it> wrote:
>> I tried to insert in both ways. With oid type i able to insert
>> images, but
>> with bytea i don't understand how store it .
>
> I would definitely suggest to use 'bytea' column rather than large
> objects support in PostgreSQL, as it is much simpler to manage.
>
>> INSERT INTO images (img) VALUES (pg_escape_bytea('C:\\9999.jpg'))
>
> bytea is an array of bytes, it is like a binary string. You must
> provide directly the binary content yourself in your SQL query
> (PostgreSQL does not have a clue about where your locale file is).
>
> Loading must be performed at client level, using your favourite
> application language, then passed to PostgreSQL. Every major language
> now is able to deal with PostgreSQL's bytea type transparently.
> Otherwise, you can still do it yourself, by properly formatting every
> input byte in your SQL query using the format described here:
> http://www.postgresql.org/docs/9.0/static/datatype-binary.html
>
>> but it doesn't work.
>> So How can i solve my problem? and another question.. If i able to
>> store my
>> image into bytea fiels..how can i export it for see it for example
>> with paint?
>
> You still have to think in terms of binary information, sequences of
> bytes. Your application might return it via the web (typical case) or
> save it locally in a temporary folder for display.
>
> Ciao,
> Gabriele
>
>--
> Gabriele Bartolini - 2ndQuadrant Italia
> PostgreSQL Training, Services and Support
> Gabriele(dot)Bartolini(at)2ndQuadrant(dot)it - www.2ndQuadrant.it
>
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