David Fetter wrote:
I think the main discussion has been around:
1. Whether Edward's final-year project is basically EAV (in which case he'll probably need to work hard to get good marks).

As Josh mentioned, I'm on of the people who says EAV is never
justified.  We do have a way of expressing wide ranges of constraints
not known in advance: it's called SQL, and people need to do some
design using it, however much they may fear that they've left
something out somehow. :)

ISTM that the biggest problem with EAV is that is is far too seductive, and allows for lazy design (or lack of design). There might be odd cases (pace David) that require it, but I strongly suspect in most cases it is not necessary.

Perhaps we need some sort of discriminant record type ;-)



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