From: | Hannu Krosing <hannu(at)tm(dot)ee> |
---|---|
To: | Josh Burdick <jburdick(at)gradient(dot)cis(dot)upenn(dot)edu> |
Cc: | pgsql-hackers(at)postgresql(dot)org, josh(at)agliodbs(dot)com |
Subject: | Re: finding medians |
Date: | 2002-05-30 20:16:41 |
Message-ID: | 1022789803.2024.5.camel@rh72.home.ee |
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Lists: | pgsql-hackers |
On Fri, 2002-05-31 at 01:16, Josh Burdick wrote:
> BUG: this isn't properly set up to deal with multiple users.
> For example, if A computes a median, then B could read the data
> from the median_tmp table. Possibly you could fiddle with
> transaction isolation levels, or add a user field to median_tmp,
> or something else complicated, to prevent this, but for now I'm
> not worrying about this.
You could just use temp tables and indexes - they are local to
connection .
create TEMP sequence median_id;
create TEMP table median_tmp (
median_id int,
x float4
);
---------------
Hannu
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