Tom Lane wrote:
The existing geometric containment tests seem to be nonstrict, so if we wanted to leave room to add strict ones later, it might be best to settle onx @>= y x contains or equals y x <=@ y x is contained in or equals y reserving @> and <@ for future strict comparison operators.
Since the choice of @> and <@ comes from current ltree operators I'd like to point out that they are non-strict for ltree, and this could add a little bit of inconsistence.
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