> We are annotating nodes on a hierarchical structureI don't mean to be rude, but yuck. Why provide a
> where NULL implied an
record for data that isn't there?
No offence taken - I'm trying to improve an old (partially inherited) system, hence the original post.
I have no idea if this model would work for you, but
maybe it will help.
That approach all sounds sensible, however going through the links that Richard Broersma sent over in a previous post - I'm currently leaning towards the flexibility and intuitive interface that ltree contrib module appears to offer.
http://www.postgresql.org/docs/8.3/interactive/ltree.html
Cheers,
Ian