Re: [GENERAL] Large data and slow queries

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От John R Pierce
Тема Re: [GENERAL] Large data and slow queries
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Msg-id dd56dc4e-04e2-1d75-e142-10ed8510377d@hogranch.com
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Ответ на [GENERAL] Large data and slow queries  (Samuel Williams <space.ship.traveller@gmail.com>)
Ответы Re: [GENERAL] Large data and slow queries  (Samuel Williams <space.ship.traveller@gmail.com>)
Список pgsql-general
On 4/18/2017 9:01 PM, Samuel Williams wrote:
> We want the following kinds of query to be fast:
>
> SELECT ... AND (latitude > -37.03079375089291 AND latitude <
> -36.67086424910709 AND longitude > 174.6307139779924 AND longitude <
> 175.0805140220076);


I wonder if GIST would work better if you use the native POINT type, and
compared it like

mypoint <@ BOX
'((174.6307139779924,-37.03079375089291),(175.0805140220076,-36.67086424910709
))'

with a gist index on mypoint...

but, it all hinges on which clauses in your query are most selective,
thats where you want an index.

--
john r pierce, recycling bits in santa cruz



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