Re: Store derived data or use view?

From: Martin Gainty <mgainty(at)hotmail(dot)com>
To: <gvimrc(at)googlemail(dot)com>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Store derived data or use view?
Date: 2009-07-03 19:46:50
Message-ID: BLU142-W9134CF6D19977CF459EEBAE2C0@phx.gbl
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i just asked NASA the same question
I'll post the answer back to the list..

Martin Gainty
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- Wehrner Von Braun
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> Date: Fri, 3 Jul 2009 18:08:17 +0100
> From: gvimrc(at)googlemail(dot)com
> To: pgsql-general(at)postgresql(dot)org
> Subject: [GENERAL] Store derived data or use view?
>
> I have a table which stores the absolute longitude of a planetary position, eg:
>
> MERCURY
> ---------------
> 157.65
>
> SATURN
> -------------
> 247.65
>
> When 2 planets are a certain distance apart there is an 'aspect', eg. 90 degrees is a "square" aspect
>
> I wish to record these aspects for different user profiles and eventually do searches for users who have the same aspect(s). Would it be better, in terms of search speed/efficiency, to calculate and store the aspect data, eg. Mercury/Saturn square, or should I just store the longitude data and create a view with the calculated aspects? I anticipate a large dataset of users so search speed/efficiency is very important.
>
> gvim
>
> --
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