From: Achilleus Mantzios <achill@matrix.gatewaynet.com>
To: Nosyman <nosyman@easymail.ro>
Cc: pgsql-sql@postgresql.org
Subject: Re: PRIMARY KEY and INDEX
Date: Thu, 2 Sep 2004 16:50:17 +0300 (EEST)
Message-ID: <Pine.LNX.4.44.0409021649070.5211-100000@matrix.gatewaynet.com> (raw)
In-Reply-To: <200409021358.i82DwGQ8022806@acten.itcnet.ro>
O kyrios Nosyman egrapse stis Sep 2, 2004 :
> It is necessary to define an index for a primary key column?
>
> Let's have an example
> CREATE TABLE users(
> id_user INTEGER PRIMARY KEY,
> user_name VARCHAR(25)
> );
>
> Does PgSQL automatically create an index for id_user (primary key) or it
> must be created by hand?
Yes a unique index is created automatically so as to enforce the
PK constraint.
>
> Thanks
>
>
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--
-Achilleus
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To: pgsql-sql@postgresql.org
Cc: achill@matrix.gatewaynet.com, nosyman@easymail.ro
Subject: Re: PRIMARY KEY and INDEX
In-Reply-To: <Pine.LNX.4.44.0409021649070.5211-100000@matrix.gatewaynet.com>
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