Re: Referential constraints in version 8

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Bob Smith <bsmith@xxxxxxx> writes:
> We have just finished upgrading Postgres from 7.2 to 8, and I must live 
> right or something because there was only one glitch.  When the dump 
> from 7.2 was restored into 8, some foreign key references which should 
> have been initially deferred had become non-deferrable.  I had to 
> re-define those references by dropping the corresponding triggers and 
> using ALTER TABLE to put them back as foreign key constraints, which 
> seems to have fixed the problem.  However, those references which I 
> re-defined now show up explicitly in the table descriptions as foreign 
> key constraints, and the corresponding triggers are not listed.  This 
> is great since it makes the table descriptions much more intelligible, 
> but my concern is that all the other references which I didn't 
> re-define still show as triggers and not as foreign key constraints.  
> Is this just a cosmetic issue with psql's table description, or is 
> there actually a functional difference?  Should I re-define all the 
> other foreign key constraints to be safe?

Yeah, you should --- if it shows as a trigger then the system hasn't
fully grokked it.  The contrib/adddepend script may help you.

			regards, tom lane


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