Sorry, this is a known bug. See the TODO list.
---------------------------------------------------------------------------
pgsql-bugs@postgresql.org wrote:
> Adrian Bool (aid@logic.org.uk) reports a bug with a severity of
> 3 The lower the number the more severe it is.
>
> Short Description Primary key not working correctly with
> inheritance
>
> Long Description Hi,
>
> Just started out with postgres (2 days so far!). I am intrested
> in it's inheritance abilities.
>
> I have come across something that seems to be a bug as far as
> I can make out.
>
> See the simple extract in the example code section.
>
> The second insert should not be allowed as it breaks the primary
> key's unqiueness. However postgres allows it's insertion.
>
> If one tries to insert directly into 'parent' the problem does
> not come about - the second insertion is rejected correctly.
>
> The same applies with the 'unique' constraint - which I think
> should also apply to child tables.
>
> This is in Postgres 7.1.3 - standard RedHat 7.1 build.
>
> Hope this is indeed a bug and I've not been wasting your time
> with my newness to postgres.
>
> Regards,
>
> aid
>
>
>
> Sample Code create table parent
> ( id integer primary key ) ;
>
> create table child
> ( name varchar (30) ) inherits (parent) ;
>
> insert into child values ( 1, 'Adrian' ) ; insert into child
> values ( 1, 'John' ) ;
>
>
> No file was uploaded with this report
>
>
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