Specifies the Encoder
for the intermediate value type.
Specifies the Encoder
for the intermediate value type.
2.0.0
Transform the output of the reduction.
Transform the output of the reduction.
1.6.0
Merge two intermediate values.
Merge two intermediate values.
1.6.0
Specifies the Encoder
for the final ouput value type.
Specifies the Encoder
for the final ouput value type.
2.0.0
Combine two values to produce a new value.
Combine two values to produce a new value. For performance, the function may modify b
and
return it instead of constructing new object for b.
1.6.0
Returns this Aggregator
as a TypedColumn
that can be used in Dataset
.
Returns this Aggregator
as a TypedColumn
that can be used in Dataset
.
operations.
1.6.0
A zero value for this aggregation.
A zero value for this aggregation. Should satisfy the property that any b + zero = b.
1.6.0