org.apache.flink.table.procedures

类 ProcedureDefinition

java.lang.Object

org.apache.flink.table.procedures.ProcedureDefinition

所有已实现的接口:

FunctionDefinition

@Internal
public class ProcedureDefinition
extends Object
implements FunctionDefinition

Definition of a procedure. We consider procedure as a kind of function, so make it implement FunctionDefinition.

字段概要

字段

限定符和类型	字段和说明
static String	PROCEDURE_CALL the name for the methods to be involved in the procedure.

构造器概要

构造器

构造器和说明
ProcedureDefinition(Procedure procedure)

方法概要

限定符和类型	方法和说明
FunctionKind	getKind() Returns the kind of function this definition describes.
TypeInference	getTypeInference(DataTypeFactory typeFactory) Returns the logic for performing type inference of a call to this function definition.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 org.apache.flink.table.functions.FunctionDefinition

getRequirements, isDeterministic, supportsConstantFolding

字段详细资料

PROCEDURE_CALL

public static final String PROCEDURE_CALL

the name for the methods to be involved in the procedure.

另请参阅:

常量字段值

构造器详细资料

ProcedureDefinition

public ProcedureDefinition(Procedure procedure)

方法详细资料

getKind

public FunctionKind getKind()

从接口复制的说明: FunctionDefinition

Returns the kind of function this definition describes.

指定者:

getKind 在接口中 FunctionDefinition

getTypeInference

public TypeInference getTypeInference(DataTypeFactory typeFactory)

从接口复制的说明: FunctionDefinition

Returns the logic for performing type inference of a call to this function definition.

The type inference process is responsible for inferring unknown types of input arguments, validating input arguments, and producing result types. The type inference process happens independent of a function body. The output of the type inference is used to search for a corresponding runtime implementation.

Instances of type inference can be created by using TypeInference.newBuilder().

See BuiltInFunctionDefinitions for concrete usage examples.

指定者:

getTypeInference 在接口中 FunctionDefinition