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Re: How to setup default value "0000-00-00" for "date"

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Peter Haworth <pmh(at)edison(dot)ioppublishing(dot)com>,pgsql-general(at)postgresql(dot)org
Subject: Re: How to setup default value "0000-00-00" for "date"
Date: 2004-08-20 18:14:04
Message-ID: 200408201814.i7KIE4Z10470@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-general
Tom Lane wrote:
> "Peter Haworth" <pmh(at)edison(dot)ioppublishing(dot)com> writes:
> > ... why couldn't an explicit IS NULL test
> > be allowed to use the index?
> 
> It could, if someone cared to puzzle out a way to integrate IS NULL into
> the index opclass and access method API infrastructure.  Right now all
> that stuff assumes that indexable operators are, well, operators (and I
> think there are places that assume they must be binary operators, to
> boot).
> 
> I've looked at this once or twice but always decided that the
> bang-for-the-buck ratio was too low compared to other open problems ...

I know we index NULL values in multi-column indexes, but do we
currently even store the rows that have only NULLs in a the index.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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