From: Markus Bertheau <twanger@bluetwanger.de>
To: pgsql-sql@postgresql.org
Subject: Custom type where not all elements are comparable
Date: Mon, 05 Jul 2004 17:31:36 +0200
Message-ID: <1089041496.3239.13.camel@dicaprio.akademie1.de> (raw)
Hi,
Is it possible to define or implement a type in PostgreSQL not all
values of which are comparable to each other? In particular I'm thinking
of a duration type similar to the XML Schema duration type[1]. For
example P2D (2 days) is less than P4D (4 days), but P1M (1 month) and
P30D (30 days) are not comparable.
Thanks.
[1] http://www.w3.org/TR/xmlschema-2/#duration
--
Markus Bertheau <twanger@bluetwanger.de>
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To: pgsql-sql@postgresql.org
Cc: twanger@bluetwanger.de
Subject: Re: Custom type where not all elements are comparable
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