[pvaldes]

I understand by the discussion that if you want to have a field with only four qualitative categories (0, 1, 2, 3 with zero meaning "none" and 3 being "very much") you could use a numrange or int4range for example instead the standard integer type. Interesting. Apart of being much more restrictive in the allowed input, are other advantages (less memory?) or cons (possible portability problems?) that we should be aware of?

Footnote:

> Here’s just a few examples of things you could do with interals:

The author of the article could want to fix the 'interals' typo in the text.