Reliability is gold. Thanks for the pointers. I will read up on GIN and hstore. If nothing else, duplicating an element from a doc column to a first class fi

Reliability is gold. Thanks for the pointers. I will read up on GIN and hstore. If nothing else, duplicating an element from a doc column to a first class field seems reasonable. Also, even in mongo one must define indexes which is a schema of sorts and can be non trivial to change.