>> *) xmlpath/jsonpath do searching (and decomposition) but are very
>> clunky from sql perspective and probably absolutely nogo in terms if
>> GIST/GIN.  postgres spiritually wants to do things via operators and
>> we should (if possible) at least consider that first

Why is it a nogo for GiST?  Ltree works, doesn't it?  If we only support
equality lookups in what way is a JSON doc different from a collection
of ltree rows?

We'd probably want to use SP-GiST for better index size/performance, but
I don't see that this is impossible.  Just some difficult code.

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com


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