From: Miroslav Šulc <miroslav.sulc@startnet.cz>
To: pgsql-sql@postgresql.org
Subject: Re: SELECT DISTINCT too slow
Date: Thu, 01 Jun 2006 17:03:22 +0200
Message-ID: <447F01BA.5040108@startnet.cz> (raw)
In-Reply-To: <20060601145327.GA19388@surnet.cl>
References: <447EEAF1.7040305@startnet.cz>
<20060601135310.GB18513@surnet.cl>
<447EFE92.2070509@startnet.cz>
<20060601145327.GA19388@surnet.cl>
It might be a good solution :-)
Thank you for your help.
Miroslav Šulc
Alvaro Herrera napsal(a):
> Miroslav ?ulc wrote:
>
>> Well, "key" is not primary key from another table. It is just a column
>> in pair "key" => "value".
>> The structure of the table is this:
>>
>> Id (primary key)
>> MRTPContactId (id of contact from table MRTPContact)
>> Key (key from pair key => value)
>> Value (value from pair key => value)
>>
>> So I want the get the list of keys used in the table.
>>
>
> The plan you get is the most efficient possible for that query. If you
> had a table of possible keys (which should of course be FK of "Key"),
> you could get a much faster version :-)
>
>
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To: pgsql-sql@postgresql.org
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Subject: Re: SELECT DISTINCT too slow
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