org.apache.flink.table.runtime.functions.scalar

类 CoalesceFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.ScalarFunction

org.apache.flink.table.runtime.functions.scalar.BuiltInScalarFunction

org.apache.flink.table.runtime.functions.scalar.CoalesceFunction

所有已实现的接口:

Serializable, org.apache.flink.table.functions.FunctionDefinition

@Internal
public class CoalesceFunction
extends BuiltInScalarFunction

Implementation of BuiltInFunctionDefinitions.COALESCE.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
CoalesceFunction(org.apache.flink.table.functions.SpecializedFunction.SpecializedContext context)

方法概要

限定符和类型	方法和说明
Object	eval(Object... args)

从类继承的方法 org.apache.flink.table.runtime.functions.scalar.BuiltInScalarFunction

getArgumentDataTypes, getOutputDataType, getRequirements, getTypeInference, isDeterministic

从类继承的方法 org.apache.flink.table.functions.ScalarFunction

getKind, getParameterTypes, getResultType

从类继承的方法 org.apache.flink.table.functions.UserDefinedFunction

close, functionIdentifier, open, toString

从类继承的方法 java.lang.Object

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

构造器详细资料

CoalesceFunction

public CoalesceFunction(org.apache.flink.table.functions.SpecializedFunction.SpecializedContext context)

方法详细资料

eval

@Nullable
public Object eval(Object... args)