Hi Aleksander,
I tested v3 of the patch on the current PostgreSQL master.
The patch applied cleanly, and make check completed successfully with
all 245 regression tests passing.
I also tested the existing JSON_TABLE functionality manually using
SELECT, EXPLAIN, and EXPLAIN VERBOSE, and everything worked as
expected.
I didn't run into any issues while testing this version. The patch
looks good to me.
Regards,
solai