Wow, this is awesome! So as I understand it, this uses Postgres and JSON fields to emulate the features of MongoDB, sort of as an abstraction?
Thank you! It's exactly that: basically you don't need to keep an additional MongoDB instance if you already use and maintain a Postgres server somewhere.
I translate the JSON-based query interface into the corresponding SQL statements, leveraging the excellent JSON support that PostgreSQL offers.
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[0] http://oxidedb.com