Package org.apache.flink.table.functions

Interface Summary

Interface	Description
ChangelogFunction	An extension that allows a process table function (PTF) to emit results with changelog semantics.
ChangelogFunction.ChangelogContext	Context during changelog mode inference.
FunctionDefinition	Definition of a function.
ProcessTableFunction.Context	Context that can be added as a first argument to the eval() method for additional information about the input tables and other services provided by the framework.
ProcessTableFunction.OnTimerContext	Special ProcessTableFunction.Context that is available when the onTimer() method is called.
ProcessTableFunction.TimeContext<TimeType>	A context that gives access to Flink's concepts of time and timers.
SpecializedFunction	A FunctionDefinition that can provide a runtime implementation (i.e. the function's body) that is specialized for the given call and session.
SpecializedFunction.ExpressionEvaluator	Serializable factory that can be passed into a UserDefinedFunction for evaluating previously defined expression during runtime.
SpecializedFunction.ExpressionEvaluatorFactory	Helper interface for creating SpecializedFunction.ExpressionEvaluators.
SpecializedFunction.SpecializedContext	Provides call and session information for the specialized function.
SqlCallSyntax	Provides a format for unparsing BuiltInFunctionDefinitions into a SQL string.
TableAggregateFunction.RetractableCollector<T>	Collects a record and forwards it.
TableSemantics	Provides call information about the table that has been passed to a table argument.

Class Summary

Class	Description
AggregateFunction<T,ACC>	Base class for a user-defined aggregate function.
AggregateFunctionDefinition	Deprecated. Non-legacy functions can simply omit this wrapper for declarations.
AsyncLookupFunction	A wrapper class of AsyncTableFunction for asynchronously lookup rows matching the lookup keys from external system.
AsyncPredictFunction	A wrapper class of AsyncTableFunction for asynchronous model inference.
AsyncScalarFunction	Base class for a user-defined scalar function which returns results asynchronously.
AsyncTableFunction<T>	Base class for a user-defined asynchronous table function.
BuiltInFunctionDefinition	Definition of a built-in function.
BuiltInFunctionDefinition.Builder	Builder for fluent definition of built-in functions.
BuiltInFunctionDefinitions	Dictionary of function definitions for all built-in functions.
FunctionContext	A FunctionContext allows to obtain global runtime information about the context in which the user-defined function is executed.
FunctionIdentifier	Identifies a system function with function name or a catalog function with a fully qualified identifier.
ImperativeAggregateFunction<T,ACC>	Base class for user-defined AggregateFunction and TableAggregateFunction.
LegacyUserDefinedFunctionInference	Deprecated.
LookupFunction	A wrapper class of TableFunction for synchronously lookup rows matching the lookup keys from external system.
PredictFunction	A wrapper class of TableFunction for synchronous model inference.
ProcessTableFunction<T>	Base class for a user-defined process table function (PTF).
ScalarFunction	Base class for a user-defined scalar function.
ScalarFunctionDefinition	Deprecated. Non-legacy functions can simply omit this wrapper for declarations.
TableAggregateFunction<T,ACC>	Base class for a user-defined table aggregate function.
TableAggregateFunctionDefinition	Deprecated. Non-legacy functions can simply omit this wrapper for declarations.
TableFunction<T>	Base class for a user-defined table function.
TableFunctionDefinition	Deprecated. Non-legacy functions can simply omit this wrapper for declarations.
TemporalTableFunction	Class representing temporal table function over some history table.
UserDefinedFunction	Base class for all user-defined functions.
UserDefinedFunctionHelper	Utility for dealing with subclasses of UserDefinedFunction.

Enum Summary

Enum	Description
FunctionKind	Categorizes the semantics of a FunctionDefinition.
FunctionRequirement	Characteristics that a FunctionDefinition requires.