From: Dmitry Tkach <dmitry@openratings.com>
To: Jeroen Olthof <j.olthof@millipede.nl>
Subject: Re: database abstraction -> functions
Date: Wed, 25 Sep 2002 10:03:22 -0400
Message-ID: <3D91C22A.2060500@openratings.com> (raw)
References: <amp565$2h8r$1@news.hub.org>
Jeroen Olthof wrote:
> Hi,
>
> When developing applications is a good thing to create abstraction between
> different layers
> The one concerning the database would be the persistence layer. To create
> such abstraction I want all mij datababase activitie runned through
> functions. But how can I return a set of rows instead of a single datatype
> (I looked into the setof but never found a clear simple)?
>
A very simple answer - there is no way to do what you want :-(
They promise to have it in 7.3...
I am using a workaround, where my functions glue all the columns together into a pipe-separated
line, that I then parse back into columns in my application...
Also, note that, unless your functions are in C (anything like plpgsql, or just sql), they are slow like hell...
In that case, you are much better off implementing your abstraction layer through views...
Dima
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Cc: dmitry@openratings.com, j.olthof@millipede.nl
Subject: Re: database abstraction -> functions
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