类的使用
org.apache.flink.table.functions.ImperativeAggregateFunction

使用ImperativeAggregateFunction的程序包

程序包	说明
org.apache.flink.table.functions
org.apache.flink.table.functions.python

org.apache.flink.table.functions中ImperativeAggregateFunction的使用

org.apache.flink.table.functions中ImperativeAggregateFunction的子类

限定符和类型	类和说明
class	AggregateFunction<T,ACC> Base class for a user-defined aggregate function.
class	TableAggregateFunction<T,ACC> Base class for a user-defined table aggregate function.

参数类型为ImperativeAggregateFunction的org.apache.flink.table.functions中的方法

限定符和类型	方法和说明
static <T,ACC> org.apache.flink.api.common.typeinfo.TypeInformation<ACC>	UserDefinedFunctionHelper.getAccumulatorTypeOfAggregateFunction(ImperativeAggregateFunction<T,ACC> aggregateFunction) Tries to infer the TypeInformation of an AggregateFunction's accumulator type.
static <T,ACC> org.apache.flink.api.common.typeinfo.TypeInformation<ACC>	UserDefinedFunctionHelper.getAccumulatorTypeOfAggregateFunction(ImperativeAggregateFunction<T,ACC> aggregateFunction, org.apache.flink.api.common.typeinfo.TypeInformation<ACC> scalaType) Tries to infer the TypeInformation of an AggregateFunction's accumulator type.
static <T,ACC> org.apache.flink.api.common.typeinfo.TypeInformation<T>	UserDefinedFunctionHelper.getReturnTypeOfAggregateFunction(ImperativeAggregateFunction<T,ACC> aggregateFunction) Tries to infer the TypeInformation of an AggregateFunction's accumulator type.
static <T,ACC> org.apache.flink.api.common.typeinfo.TypeInformation<T>	UserDefinedFunctionHelper.getReturnTypeOfAggregateFunction(ImperativeAggregateFunction<T,ACC> aggregateFunction, org.apache.flink.api.common.typeinfo.TypeInformation<T> scalaType) Tries to infer the TypeInformation of an AggregateFunction's accumulator type.

org.apache.flink.table.functions.python中ImperativeAggregateFunction的使用

org.apache.flink.table.functions.python中ImperativeAggregateFunction的子类

限定符和类型	类和说明
class	PythonAggregateFunction The wrapper of user defined python aggregate function.
class	PythonTableAggregateFunction The wrapper of user defined python table aggregate function.