Re: uuid_hash declaration

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Dimitri Fontaine <dfontaine(at)hi-media(dot)com>
Cc: Mel Flynn <mel(dot)flynn+pgsql(at)mailing(dot)thruhere(dot)net>, pgsql-general(at)postgresql(dot)org
Subject: Re: uuid_hash declaration
Date: 2009-07-13 14:40:50
Message-ID: 20090713144050.GB4930@alvh.no-ip.org
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Dimitri Fontaine wrote:
> Mel Flynn <mel(dot)flynn+pgsql(at)mailing(dot)thruhere(dot)net> writes:
>
> > Is there a way in the API to tell the backend that "uuid_hash function is
> > implemented by the foo__uuid_hash function" so that backwards compatibility
> > isn't broken?
>
> Yes.
> http://www.postgresql.org/docs/8.3/interactive/xfunc-c.html#XFUNC-C-PGXS
>
> For example:
>
> CREATE OR REPLACE FUNCTION uuid_hash(uuid)
> RETURNS bool
> AS 'MODULE_PATHNAME', my_uuid_hash
> LANGUAGE 'C' IMMUTABLE STRICT;

I think the problem he is having is that we provide a C function named
uuid_hash, which conflicts with the one in FreeBSD's libc.

If that's the problem, my 2c is that uuid_hash is too generic a name to
export and we should change ours.

--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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