Re: Mostly Harmless: Welcoming our C++ friends

From: Gregory Stark <stark(at)enterprisedb(dot)com>
To: Kurt Harriman <harriman(at)acm(dot)org>
Cc: Peter Eisentraut <peter_e(at)gmx(dot)net>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Mostly Harmless: Welcoming our C++ friends
Date: 2008-12-05 11:31:05
Message-ID: 87prk6x3ie.fsf@oxford.xeocode.com
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Kurt Harriman <harriman(at)acm(dot)org> writes:

> Hi Peter,
>
>> Have you considered writing a procedural language plugin for C++?
>
> C++ can masquerade as C, so I don't think it needs a separate
> plugin. Just tell PostgreSQL that your user-defined function
> is C even though you secretly know it is C++.

Well one thing that might be useful for a c++ procedural language would be
catching C++ exceptions and translating them into ereports which could then be
caught in Postgres.

That's actually what I thought you had done but I just reread your mail and
realized you only handled unhandled exceptions which cause the backend to die.

The other way around could be useful too -- catching ereports/elogs within a
backend API call from C++ code and throwing a C++ exception. I'm not sure if
that's doable though.

--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Ask me about EnterpriseDB's RemoteDBA services!

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