Attribute a batch's timestamp column is emitted as.
The attribute value is the Arrow timestamp as a bigint in unit, never a
Date and never epoch milliseconds, so microsecond and nanosecond batches
round-trip exactly. A null timestamp becomes an explicit null attribute.
Attribute a batch's timestamp column is emitted as.
The attribute value is the Arrow timestamp as a
bigintinunit, never aDateand never epoch milliseconds, so microsecond and nanosecond batches round-trip exactly. A null timestamp becomes an explicitnullattribute.