SELECT
    toLowCardinality('') AS lc,
    toTypeName(lc)
WHERE lc = defaultValueOfArgumentType(lc)

┌─lc─┬─toTypeName(toLowCardinality(''))─┐
│    │ LowCardinality(String)           │
└────┴──────────────────────────────────┘


SELECT
    materialize(toLowCardinality('')) AS lc,
    toTypeName(lc)
WHERE lc = defaultValueOfArgumentType(lc)

Received exception from server (version 20.4.4):
Code: 49. DB::Exception: Received from localhost:9000. DB::Exception: Expected single dictionary argument for function..