package org.apache.spark.sql.execution.aggregate

trait TypedAggregateExpression extends AggregateFunction {
  // only required methods that have no implementation
  def aggregator: Aggregator[Any, Any, Any]
  def inputClass: Option[Class[_]]
  def inputDeserializer: Option[Expression]
  def inputSchema: Option[StructType]
  def withInputInfo(deser: Expression, cls: Class[_], schema: StructType): TypedAggregateExpression
}