Re: System indexes are never unique indexes( was RE: [HACKERS] mdnblocksis

From: wieck(at)debis(dot)com (Jan Wieck)
To: maillist(at)candle(dot)pha(dot)pa(dot)us (Bruce Momjian)
Cc: Inoue(at)tpf(dot)co(dot)jp, pgsql-hackers(at)postgresql(dot)org
Subject: Re: System indexes are never unique indexes( was RE: [HACKERS] mdnblocksis
Date: 1999-10-26 08:11:46
Message-ID: m11g1hq-0003kLC@orion.SAPserv.Hamburg.dsh.de
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>
> [Charset iso-8859-1 unsupported, filtering to ASCII...]
> > >
> > > > As I was afraid,2 tables of a same name could be made.
> > > > After a short investigating,I found that system indexes are
> > > > never unique indexes.
> > > > Why ?
> > > > Without duplicate index check,it's very difficult to prevent
> > > > objects from having same name.
> > >
> > > They certainly should be unique.
> > >
> >
> > All should be unique ?
> > I don't know system indexes well.
>
> Not sure. I don't remember which ones. I can take a look when I add
> more indexes for 7.0.

Don't remember if really or what, but wasn't there some
problem with cached system relations, unique indices and
concurrency?

Jan

--

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#========================================= wieck(at)debis(dot)com (Jan Wieck) #

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