| From: | Richard Huxton <dev(at)archonet(dot)com> |
|---|---|
| To: | hubert depesz lubaczewski <depesz(at)gmail(dot)com> |
| Cc: | Postgres General <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: "no unpinned buffers available" ? why? (hstore and |
| Date: | 2007-01-03 15:24:39 |
| Message-ID: | 459BCAB7.5010900@archonet.com |
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| Lists: | pgsql-general |
hubert depesz lubaczewski wrote:
>> But, it looks to me like you might be able to replace the plperl
>> function by just a straight query. That should be faster too.
>>
>
> really? i was thinking really hard on how to do it in sql, but didn't found
> any way to achieve it. actually - i dont really think it would be possible
> at all in standard sql. but then - maybe i'm wrong.
Well, it looks to me like the main problem is you're trying to convert a
table like: (advert_id, cust1, cust2, cust3) to: (advert_id, codename,
codevalue).
If you do that separately at the start of the process, (one query per
custom column in the old table) then it becomes straightforward.
--
Richard Huxton
Archonet Ltd
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