Well. The parser is in the code now. The data type exists. So I assume it's possible to quite easily write a Postgres extension module that adds the missing pie

Well. The parser is in the code now. The data type exists. So I assume it's possible to quite easily write a Postgres extension module that adds the missing pieces. Reading from the linked article I would assume that they were kind of running out of time for the feature freeze. I would expect the querying functions to be added in the release after this, or before in form of an extension.