Describe the bug

Running

select count(*) v from dicts where json_contains(json_data, str_key2)

Where json_contains returns a Dictionary(UInt32, Boolean) (as of datafusion-contrib/datafusion-functions-json#39), results in:

called `Result::unwrap()` on an `Err` value: Plan("Cannot create filter with non-boolean predicate 'json_contains(dicts.json_data, dicts.str_key2)' returning Dictionary(UInt32, Boolean)")

If I change the sql to

select count(*) v from dicts where json_contains(json_data, str_key2) is true

Works fine.

Is this intended or a mistake?

To Reproduce

No response

Expected behavior

I would have assumed it should just work, but perhaps I'm mistaken?

Additional context

No response