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.
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