Charles> For some APIs, it returns set of results, for example, Charles> json_each(json) and json_object_keys().
Charles> Basically, I want to call these json API inside a plugin,
If you want to process the whole of a json (not jsonb) value inside a plugin, then maybe pg_parse_json is what you should be looking at rather than the SQL-callable functions.
For jsonb, there's an iterator interface (JsonbIteratorInit/JsonbIteratorNext) -- Andrew (irc:RhodiumToad)
