Re: Re: plperl and sqrt.

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Travis Bauer <trbauer(at)indiana(dot)edu>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Re: plperl and sqrt.
Date: 2001-01-18 18:42:17
Message-ID: 4282.979843337@sss.pgh.pa.us
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Travis Bauer <trbauer(at)indiana(dot)edu> writes:
> ... sqrt is disables because you can use it to produce
> floating point exceptions which would call $SIG{??}.

That seems a little silly, unless they also lock out *all* floating
point ops plus integer division (what about divide by zero?).

> I'm not sure why this is bad, but it seems that this would violate the
> comparment somehow.

Offhand I think this is not reasonable or necessary for Postgres' use.
I'd support adding base_math to our standard mask.

> Anyway, it would be nice to have a commandline switch for the
> Makefile.PL script which would allow people to customize the
> operation mask that plperl.so uses.

Submit a patch (and more importantly, documentation patches so that
people will know about this issue).

regards, tom lane

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