Hi,

Extraction of a PostgresSQL-style path fails when it refers to a name consisting only of numeric characters, as in the 3rd example below:

--Returns "one" as expected
SELECT json_extract('{"1":"one"}', '$.1');

--MySQL-style returns "one" as expected
SELECT '{"1":"one"}' -> '$.1';

--PostgreSQL-style unexpectedly returns NULL
SELECT '{"1":"one"}' -> '1';