| From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
|---|---|
| To: | Dann Corbit <DCorbit(at)connx(dot)com> |
| Cc: | Gregory Stark <stark(at)enterprisedb(dot)com>, Martijn van Oosterhout <kleptog(at)svana(dot)org>, pgsql-hackers(at)postgresql(dot)org, Larry McGhaw <lmcghaw(at)connx(dot)com> |
| Subject: | Re: Selecting a constant question |
| Date: | 2007-06-11 22:27:18 |
| Message-ID: | 20070611222718.GD24760@alvh.no-ip.org |
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| Thread: | |
| Lists: | pgsql-hackers |
Dann Corbit wrote:
> > Oh, you have the length information for each datum all right. It's on
> > the first four bytes of it.
>
> Sure, but when I bind to a grid, I need to know a-priori how big the
> biggest returned instance can be. Reading the entire data set twice to
> learn the size of a constant seems rather conceptually odd to me.
Did you read up on typmod already? I think that's part of the info sent
down in the query response.
--
Alvaro Herrera http://www.flickr.com/photos/alvherre/
"No single strategy is always right (Unless the boss says so)"
(Larry Wall)
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