Re: Foreign key constraint for array-field?

On Sun, 2008-09-21 at 15:07 -0400, Andrew Dunstan wrote:
> 
> Simon Riggs wrote:
> > No, its not possible. Need a trigger.
> >
> > I think we should support it though. If we extend the relational model
> > with arrays then it would be sensible if we support this aspect as
> > well. 
> >
> > Implementation would be fairly straightforward. ri_triggers currently
> > assumes a non-array value is being checked, but that could be changed to
> > IN(array). Multi-column keys with arrays sound confusing though.
> >   
> 
> What's the syntax going to look like?

The ALTER TABLE would have exactly the same syntax.

-- Simon Riggs           www.2ndQuadrant.comPostgreSQL Training, Services and Support