| From: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
|---|---|
| To: | "David E(dot) Wheeler" <david(at)kineticode(dot)com> |
| Cc: | Tim Bunce <Tim(dot)Bunce(at)pobox(dot)com>, Greg Sabino Mullane <greg(at)endpoint(dot)com>, Richard Huxton <dev(at)archonet(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: PostgreSQL::PLPerl::Call - Simple interface for calling SQL functions from PostgreSQL PL/Perl |
| Date: | 2010-02-16 17:27:47 |
| Message-ID: | 20100216172746.GB10778@svana.org |
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| Lists: | pgsql-hackers |
On Tue, Feb 16, 2010 at 09:11:24AM -0800, David E. Wheeler wrote:
> > An extra source of puzzlement is that the oid of the 'unknown' type is
> > 705 not 0, and the unknown type isn't discussed in the docs (as far as I
> > could see).
>
> Yes, I noticed that, too. Greg, do you know the answer to that?
My guess is that, semantically, 0 means the datatype is unknown,
whereas 705 means the datatype is known to be type "unknown".
I believe however the backend treats these cases identically (at least,
simple testing doesn't reveal any differences), but they are not the
same.
Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Please line up in a tree and maintain the heap invariant while
> boarding. Thank you for flying nlogn airlines.
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