Re: [HACKERS] Adding a field to each tuple

> 
> Ok,
> 
> I decided to learn more about postgresql.
> 
> My challenge:
> Given an oid, efficiently determine the most derived class the instance
> belongs to.
> 
> My intended solution is to add an extra attribute to each tuple
> which contains the oid of the most derived class it belongs to.

This is a lot of overhead for places it is not needed.

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