Attached 9th version of jsonpath patches rebased onto the latest master.
Jsonpath grammar for parenthesized expressions and predicates was fixed.
Documentation drafts for jsonpath written by Oleg Bartunov:
https://github.com/obartunov/sqljsondoc
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Nikita Glukhov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
