From: Pavel Stehule <pavel.stehule@gmail.com>
To: Guillaume Lelarge <guillaume@lelarge.info>
Cc: pgsql-sql@postgresql.org, Another Trad <anothertrad@gmail.com>
Cc: Lee Hachadoorian <lee.hachadoorian@gmail.com>
Subject: Re: LIMIT BASED ON PERCENT
Date: Wed, 18 Nov 2009 20:30:56 +0100
Message-ID: <162867790911181130n74be837eo29e3c408724c88f7@mail.gmail.com> (raw)
In-Reply-To: <200911182027.08857.guillaume@lelarge.info>
References: <af7271950911181112h574da17euf94d9640ec7680df@mail.gmail.com>
<5ab13580911181121g6e89759doa6c6ea6557424f71@mail.gmail.com>
<af7271950911181124i2a309729q2271d9f878e42f3d@mail.gmail.com>
<200911182027.08857.guillaume@lelarge.info>
2009/11/18 Guillaume Lelarge <guillaume@lelarge.info>:
> Le mercredi 18 novembre 2009 à 20:24:09, Another Trad a écrit :
>> No, It doesn't.
>> In my machine:
>>
>> First select
>> ERROR: syntax error at end of input
>> LINE 1: select * from rapadura.cliente limit 20%
>> ^
>> Second one:
>> ERROR: argument of LIMIT must not contain subqueries
>>
>> Postgres 8.3
>>
>
> It works for Lee because obviously he's working on a 8.4 server. You can use
> subquery in a LIMIT clause if you have an 8.4 PostgreSQL server. For earlier
> releases, there's no way to do this in a single query.
>
yes, and don't use 20%.
select * from foo order by somecol limit (select (count(*)*0.2)::int from foo)
Regards
Pavel
>
> --
> Guillaume.
> http://www.postgresqlfr.org
> http://dalibo.com
>
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To: pgsql-sql@postgresql.org
Cc: pavel.stehule@gmail.com, guillaume@lelarge.info, anothertrad@gmail.com, lee.hachadoorian@gmail.com
Subject: Re: LIMIT BASED ON PERCENT
In-Reply-To: <162867790911181130n74be837eo29e3c408724c88f7@mail.gmail.com>
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