From: | Scott Lamb <slamb(at)slamb(dot)org> |
---|---|
To: | pgsql-advocacy(at)postgresql(dot)org |
Subject: | Re: postgresql documentation iimprovements |
Date: | 2002-12-18 07:36:05 |
Message-ID: | 3E002565.9040309@slamb.org |
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Thread: | |
Lists: | pgsql-advocacy |
Gavin Sherry wrote:
> On Tue, 17 Dec 2002, Merlin Moncure wrote:
>>2. IMHO, The documentation for create rule is not clear and detailed
>>enough. PHPfreaks.com has a very nice tutorial about this command and
>>how it could be used in a production database. It is very important for
>>usage of this command to be clear, because only postgres has it, and
>
> FWIW Oracle and other databases have rules.
This didn't sound right, so I just checked. The Oracle docs do not
mention "create rule". Google says Microsoft Transact SQL has a "create
rule", but it's not at all the same: a really, really old syntax for
check constraints or something. Only still there for backwards
compatibility.
I think Oracle's triggers just encompass everything PostgreSQL's rules
do, but I've never dug into the docs enough to really understand the
trigger/rule distinction. And it's late and I'm tired, so
<http://www.postgresql.org/idocs/index.php?rules-triggers.html> doesn't
make sense to me.
Scott
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