Re: altering foreign keys

On Jan 22, 2008, at 1:11 PM, Adam Rich wrote:

> In my database, I have a core table that nearly all other tables
> key against. Now I need to adjust all of those foreign keys to
> add a "on update cascade" action. Is there a way to alter the
> existing keys? (it didn't jump out at me in the manual)
>
> If not, is there a serious issue preventing this feature?
>
> If I have to drop and re-create all of the foreign keys, is it
> possible to wrap the whole operation in a transaction without
> risking invalid inserts in the referring tables? (I come from
> an Oracle background, where DDL causes an implicit commit)

DDL in Postgres is transactional so your second option will work just
fine.

Erik Jones

DBA | Emma®
erik(at)myemma(dot)com
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