org.apache.flink.table.expressions

类 CallExpression

java.lang.Object

org.apache.flink.table.expressions.CallExpression

所有已实现的接口:

Expression, ResolvedExpression

@PublicEvolving
public final class CallExpression
extends Object
implements ResolvedExpression

Resolved and validated call expression for calling a function.

A call contains:

• an output type
• a FunctionDefinition that identifies the function to be called
• an optional ObjectIdentifier that tracks the origin of a function

构造器概要

构造器

构造器和说明
CallExpression(FunctionDefinition functionDefinition, List<ResolvedExpression> args, DataType dataType)
CallExpression(FunctionIdentifier functionIdentifier, FunctionDefinition functionDefinition, List<ResolvedExpression> args, DataType dataType)

方法概要

限定符和类型	方法和说明
<R> R	accept(ExpressionVisitor<R> visitor)
String	asSummaryString() Returns a string that summarizes this expression for printing to a console.
boolean	equals(Object o)
List<Expression>	getChildren()
FunctionDefinition	getFunctionDefinition()
Optional<FunctionIdentifier>	getFunctionIdentifier()
DataType	getOutputDataType() Returns the data type of the computation result.
List<ResolvedExpression>	getResolvedChildren()
int	hashCode()
String	toString()

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

从接口继承的方法 org.apache.flink.table.expressions.ResolvedExpression

asSerializableString

构造器详细资料

CallExpression

public CallExpression(FunctionIdentifier functionIdentifier,
                      FunctionDefinition functionDefinition,
                      List<ResolvedExpression> args,
                      DataType dataType)

CallExpression

public CallExpression(FunctionDefinition functionDefinition,
                      List<ResolvedExpression> args,
                      DataType dataType)

方法详细资料

getFunctionIdentifier

public Optional<FunctionIdentifier> getFunctionIdentifier()

getFunctionDefinition

public FunctionDefinition getFunctionDefinition()

getOutputDataType

public DataType getOutputDataType()

从接口复制的说明: ResolvedExpression

Returns the data type of the computation result.

指定者:

getOutputDataType 在接口中 ResolvedExpression

getResolvedChildren

public List<ResolvedExpression> getResolvedChildren()

指定者:

getResolvedChildren 在接口中 ResolvedExpression

asSummaryString

public String asSummaryString()

从接口复制的说明: Expression

Returns a string that summarizes this expression for printing to a console. An implementation might skip very specific properties.

指定者:

asSummaryString 在接口中 Expression

返回:

summary string of this expression for debugging purposes

getChildren

public List<Expression> getChildren()

指定者:

getChildren 在接口中 Expression

accept

public <R> R accept(ExpressionVisitor<R> visitor)

指定者:

accept 在接口中 Expression

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object