Hi, I have a question about how the JSON type with hints works exactly. If I have something like this:

CREATE TABLE test (json JSON(a.b UInt32)) ENGINE = Memory;

can I then safely do something like this:

ALTER TABLE test MODIFY COLUMN json JSON(a.b UInt32, a.c String);

How about this:

ALTER TABLE test MODIFY COLUMN json JSON(a.b String);

Or this:

ALTER TABLE test MODIFY COLUMN json JSON(a.c String);

What exactly is the behavior? Does the type hint influence query time, or ingest time, or both? What happens to the existing data when modifying the type? I'm ingesting JSON data with a schema that can change over time and I want to provide as much type hints as possible.