Re: Are indexes auto created when you create a foreign key? On Apr 21, 10:49*am, "Peter H. Coffin" <hell...@ninehells.com> wrote:
> On Mon, 21 Apr 2008 09:05:23 -0700 (PDT), chris wrote:
> > When you create a foreign key, is an index also created for the same
> > column? *I have searched around for the answer on this and I have
> > gotten conflicting answers.
>
> Depends on the version. In Mysql version 4.1.2 and later, the InnoDB
> engine will build the index automatically. Prior versions needed the
> index to be created beforehand, and then specified when you're actually
> declaring the FK.
>
> > They way mysql works, is this the same for all databases?
>
> Yes, the same for all databases, because this is version-dependant
> behavior.
>
> --
> I think I'd like to see a Simpsons episode starting up with Bart Simpson
> writing "I will not attempt to undermine the Usenet Cabal".
> * * * * * * * -- J. D. Falk
Hey Peter,
Thanks for clearing that up. |