OptionalextraOptionalfunctionAn aggregation function applied over a time window.
Selects the latest value of a single column in a data source
OptionalfunctionDeprecated: Use the function oneof with AggregationFunction instead. Kept for backwards compatibility. The type of the function.
Deprecated: Use the function oneof with AggregationFunction instead. Kept for backwards compatibility. Extra parameters for parameterized functions.