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

使用UserDefinedFunction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UserDefinedFunction的使用

org.apache.flink.table.functions中UserDefinedFunction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	AsyncTableFunction<T> Base class for a user-defined asynchronous table function.
class	ImperativeAggregateFunction<T,ACC> Base class for user-defined AggregateFunction and TableAggregateFunction.
class	ScalarFunction Base class for a user-defined scalar function.
class	TableAggregateFunction<T,ACC> Base class for a user-defined table aggregate function.
class	TableFunction<T> Base class for a user-defined table function.
class	TemporalTableFunction Class representing temporal table function over some history table.

返回UserDefinedFunction的org.apache.flink.table.functions中的方法

限定符和类型	方法和说明
static UserDefinedFunction	UserDefinedFunctionHelper.createSpecializedFunction(String functionName, FunctionDefinition definition, CallContext callContext, ClassLoader builtInClassLoader, org.apache.flink.configuration.ReadableConfig configuration) Creates the runtime implementation of a FunctionDefinition as an instance of UserDefinedFunction.
static UserDefinedFunction	UserDefinedFunctionHelper.instantiateFunction(Class<? extends UserDefinedFunction> functionClass) Instantiates a UserDefinedFunction assuming a JVM function with default constructor.
static UserDefinedFunction	UserDefinedFunctionHelper.instantiateFunction(ClassLoader classLoader, org.apache.flink.configuration.ReadableConfig config, String name, CatalogFunction catalogFunction) Instantiates a UserDefinedFunction from a CatalogFunction.
UserDefinedFunction	BuiltInFunctionDefinition.specialize(SpecializedFunction.SpecializedContext context)
UserDefinedFunction	SpecializedFunction.specialize(SpecializedFunction.SpecializedContext context) Provides a runtime implementation that is specialized for the given call and session.

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

限定符和类型	方法和说明
static void	UserDefinedFunctionHelper.prepareInstance(org.apache.flink.configuration.ReadableConfig config, UserDefinedFunction function) Prepares a UserDefinedFunction instance for usage in the API.

类型变量类型为UserDefinedFunction的org.apache.flink.table.functions中的方法参数

限定符和类型	方法和说明
static UserDefinedFunction	UserDefinedFunctionHelper.instantiateFunction(Class<? extends UserDefinedFunction> functionClass) Instantiates a UserDefinedFunction assuming a JVM function with default constructor.
static void	UserDefinedFunctionHelper.validateClass(Class<? extends UserDefinedFunction> functionClass) Validates a UserDefinedFunction class for usage in the API.
static void	UserDefinedFunctionHelper.validateClassForRuntime(Class<? extends UserDefinedFunction> functionClass, String methodName, Class<?>[] argumentClasses, Class<?> outputClass, String functionName) Validates a UserDefinedFunction class for usage in the runtime.

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

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

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