| From: | Andreas Seltenreich <andreas+pg(at)gate450(dot)dyndns(dot)org> |
|---|---|
| To: | Ketema Harris <ketema(at)gmail(dot)com> |
| Cc: | pgsql-novice(at)postgresql(dot)org |
| Subject: | Re: Foreign Keys With Arrays |
| Date: | 2006-02-07 08:09:40 |
| Message-ID: | 87irrr8u9n.fsf@gate450.dyndns.org |
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| Thread: | |
| Lists: | pgsql-novice |
Andreas Seltenreich writes:
> Ketema Harris writes:
>
>> If I have a column that is of type int4[] (array of integers) is it possible
>> to require that each integer within that array is a foreign key?
>
> I'm afraid you'll have to define a custom check-constraint to do that.
>
> E.g.
>
[...]
> scratch=# create function valid_array(a int4[]) returns boolean as $$
[...]
...and of course you'll need the appropriate trigger function on the
referenced table to maintain referential integrity, but I hope the
example will get you going.
regards,
Andreas
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