| From: | Matthew Kirkwood <matthew(at)hairy(dot)beasts(dot)org> |
|---|---|
| To: | Jean-Paul ARGUDO <jean-paul(dot)argudo(at)idealx(dot)com> |
| Cc: | Hannu Krosing <hannu(at)krosing(dot)net>, Zeugswetter Andreas SB SD <ZeugswetterA(at)spardat(dot)at>, <pgsql-hackers(at)postgresql(dot)org>, David BARTH <dbarth(at)idealx(dot)com>, Nat MAKAREVITCH <nat(at)idealx(dot)com>, Nicolas NICLAUSSE <nicolas(dot)niclausse(at)idealx(dot)com>, Sébastien DINOT <sebastien(dot)dinot(at)idealx(dot)com> |
| Subject: | Re: Survey results on Oracle/M$NT4 to PG72/RH72 migration |
| Date: | 2002-03-14 16:15:25 |
| Message-ID: | Pine.LNX.4.33.0203141612330.3998-100000@sphinx.mythic-beasts.com |
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| Lists: | pgsql-hackers |
On Thu, 14 Mar 2002, Jean-Paul ARGUDO wrote:
> This daemon wakes up every 5 seconds. It scans (SELECT...) for new
> insert in a table (lika trigger). When new tuples are found, it
> launches the work. The work consist in computing total sales of a big
> store...
You might find it worthwhile to investigate "listen" and
"notify" -- combined with a rule or trigger, you can get
this effect in near-real-time
You'll probably still want a sleep(5) at the end of the
loop so you can batch a reasonable number of updates if
there's a lot going on.
Matthew.
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