Re: Inheritance mapping in a RDBMS
From: Marshall Spight <mspight_at_dnai.com>
Date: Mon, 19 Jan 2004 17:44:36 GMT
Message-ID: <8IUOb.101610$na.53979_at_attbi_s04>
> What I am trying to do is, map an inheritance hierarchy in a relational
> database system.
Date: Mon, 19 Jan 2004 17:44:36 GMT
Message-ID: <8IUOb.101610$na.53979_at_attbi_s04>
"Maarten van der Peet" <Maarten.van.der.Peet_at_liposuctie4all.nl.invalid> wrote in message news:1g7tdnt.95hic8i9a3dhN%Maarten.van.der.Peet_at_liposuctie4all.nl.invalid...
>
> What I am trying to do is, map an inheritance hierarchy in a relational
> database system.
None of the RDBMSs support inheritance directly, except Postgres.
Hmmm. What about having a polymorphic set theory for databases? Each set has a rowtype; each row is either of that type or a subtype. This would allow polymorphic set-at-a-time operations. That would be cool.
Marshall Received on Mon Jan 19 2004 - 18:44:36 CET