Re: [GENERAL] Inheritance and primary key

This is a known bug (TODO item "Unique index on base column not honored on
inserts from inherited table"). Not sure though when or how this will be
fixed.

On 2000-01-10, Guillaume Rousse mentioned:

> 
> I use a super-class S (virtual, in fact) ans three inheritated classes S1, S2
> and S3. i wish to have a primary key for all these classes, in order to use
> queries as : SELECT * FROM S* WHERE s.id=x
> I use a serial ID field for S as a primary key. Sequencing is OK, as any
> insertion in any of the four classes increments the counter. But uniqueness
> constraint is lost, as i can have duplicated values between differents classes.
> And even in the same class for the inherited ones, as primary key propertie of
> ID column is lost through inheritance. And i can't specify a unique constraint
> on this column, as it is not present in the class definition.
> How to solve this problem ?
> 
> --
> Guillaume Rousse
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> Iremia -Université de la Réunion
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> Mail:Guillaume.Rousse@univ-reunion.fr
> 
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> 
> 
> ************
> 
> 

-- 
Peter Eisentraut                  Sernanders väg 10:115
peter_e@gmx.net                   75262 Uppsala
http://yi.org/peter-e/            Sweden