temporalValue
The raw counter behind a time or timestamp: microseconds for VariantPrimitiveType.TIME_NTZ, VariantPrimitiveType.TIMESTAMP_TZ and VariantPrimitiveType.TIMESTAMP_NTZ, nanoseconds for the two NANOS types.
The unit is deliberately not normalised away — primitiveType carries it, and converting here would either lose nanosecond precision or invent it.
Throws
unless this value is a time or a timestamp.