From: Tommy Cheng <csckcac@gmail.com>
To: pgsql-admin@postgresql.org
Subject: Re: turn off auto index for foreign key
Date: Tue, 10 Jun 2008 13:16:55 +0800
Message-ID: <2267dd9e0806092216n1dabf29ai6e7b82a727eaf5c5@mail.gmail.com> (raw)
In-Reply-To: <34d269d40806092158vc3069e7gfd58166dee46aa2c@mail.gmail.com>
References: <2267dd9e0806091948k24a46cegcd45e65a5aa632ed@mail.gmail.com>
<dcc563d10806092050y3f41ef00j95390d335e4d11c0@mail.gmail.com>
<2267dd9e0806092117sda112dt8ac2f2ba8ed5e66f@mail.gmail.com>
<34d269d40806092158vc3069e7gfd58166dee46aa2c@mail.gmail.com>
um...Your soln is possible. But if the user created an unique index using
constraint name <table_name>_<column_name>_key5, it will not be able to
distinguish it from other auto index.
On Tue, Jun 10, 2008 at 12:58 PM, Alex Hunsaker <badalex@gmail.com> wrote:
> On Mon, Jun 9, 2008 at 10:17 PM, Tommy Cheng <csckcac@gmail.com> wrote:
> > you are right. I double checked. So, is there any way to turn off auto
> index
> > creation for the parent? (the best is changing postgresql database
> setting)
> > I am using postgres (PostgreSQL) 8.1.9 on CentOS 5 x86_64
> >
>
> Again, there is no auto index creation for foriegn keys. However if
> you declared the column unique or its the pkey (ala unique) (As Scott
> said) then there will an index.
>
> No you cant turn it off because its how postgres enforces uniqueness
> see
> http://www.postgresql.org/docs/8.1/interactive/index-unique-checks.html
> for more
>
> My guess, use the name of the index to try to distinguish. Auto
> generated ones will always be in the form:
> pkey: <table_name>_pkey(num)
> unique: <table_name>_<column_name>_key(num)
>
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To: pgsql-admin@postgresql.org
Cc: csckcac@gmail.com
Subject: Re: turn off auto index for foreign key
In-Reply-To: <2267dd9e0806092216n1dabf29ai6e7b82a727eaf5c5@mail.gmail.com>
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