I think Oracle does. My impression is that PostgreSQL sort-of "invented" JSON support in the db, then Oracle (and probably others) added JSON support with a different syntax, and then Oracle got their version defined into the SQL standard. I'm half-guessing here, but it's based on what I've gleaned from Markus Winand's [0] excellent compatibility tables in his slides [1].
Postgres 12, whose development has reached feature freeze and is in a stability period, has added some support for JSON path as of SQL:2016: https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit...
The release is planned for roughly next September/October.
Interesting, I wonder which databases actually implement SQL:2016 (and JSON as standardized). JSON support in Postgres predates SQL:2016 in any case.
I think Oracle does. My impression is that PostgreSQL sort-of "invented" JSON support in the db, then Oracle (and probably others) added JSON support with a different syntax, and then Oracle got their version defined into the SQL standard. I'm half-guessing here, but it's based on what I've gleaned from Markus Winand's [0] excellent compatibility tables in his slides [1].
[0] https://modern-sql.com/
[1] https://modern-sql.com/slides/ModernSQL-2019-05-08.pdf, for example
(Edited for formatting.)