Hi Kevin,

this example was for teaching AI students (with limited PostgreSQL 
knowledge) in a very basic lecture -- I did not want to tweak the SQL 
semantics too much; just demonstrate why SQL is rightfully called a 4GL 
language. ;-)

Cheers, Nick

On 02/01/2011 10:08 PM, Kevin Grittner wrote:
> Nick Rudnick<joerg(dot)rudnick(at)t-online(dot)de>  wrote:
>
>> here an inelegant example
>
> Based on that example, you should be sure to look at the INHERITS
> clause of CREATE TABLE:
>
> http://www.postgresql.org/docs/current/interactive/sql-createtable.html
>
> PostgreSQL has the "is a" structure built in.  That may not get you
> all the way there, but between that and a few views, you might get
> close without needing a lot of low level infrastructure work.
>
> -Kevin
>

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• Re: [pgsql-general 2011-1-21:] Are there any projects interested in object functionality? (+ rule bases) at 2011-02-01 21:08:54 from Kevin Grittner

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