Re: is there any defect when use null column in postgresql?

From: leopay <leopay(at)gmail(dot)com>
To: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: is there any defect when use null column in postgresql?
Date: 2009-03-16 03:39:01
Message-ID: e9369e430903152039md98d118tf17e6af5ac4451d7@mail.gmail.com
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On Mon, Mar 16, 2009 at 11:36 AM, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>wrote:

> On Sun, Mar 15, 2009 at 9:00 PM, leopay <leopay(at)gmail(dot)com> wrote:
> > I wanna if there is any defact when use null column in pg,
> > e.g. performance issue
>
> none that I know of. Any more specific scenarios you're wondering about?

when do the query, the column contain none value could use the index?

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