On Mon, Dec 6, 2010 at 1:37 PM, Jim Morris <[email protected]> wrote:
> Hi, > > WRT this bug entry > http://code.google.com/p/ruby-sequel/issues/detail?id=317 > > I thought a primary key with multiple columns is more like an index > not a constraint. > Primary Keys are always a constraint. They fall within the family of Unique Keys. However, most implementations will setup both the constraint and an index because clearly one is normally interested in both. This doesn't change the role of a primary key - it's just a nice add on that most engines help with. John -- You received this message because you are subscribed to the Google Groups "sequel-talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sequel-talk?hl=en.
