Inherited from NonSQLExpression
Inherited from DeclarativeAggregate
Inherited from Unevaluable
Inherited from Serializable
Inherited from Serializable
Inherited from AggregateFunction
Inherited from ImplicitCastInputTypes
Inherited from ExpectsInputTypes
Inherited from Expression
Inherited from TreeNode[Expression]
Inherited from Product
Inherited from Equals
Inherited from AnyRef
Inherited from Any
A helper class to hook Aggregator into the aggregation system.