org.apache.flink.table.expressions

类 FieldReferenceExpression

java.lang.Object

org.apache.flink.table.expressions.FieldReferenceExpression

所有已实现的接口:

Expression, ResolvedExpression

@PublicEvolving
public final class FieldReferenceExpression
extends Object
implements ResolvedExpression

A reference to a field in an input. The reference contains:

• type
• index of an input the field belongs to
• index of a field within the corresponding input

构造器概要

构造器

构造器和说明
FieldReferenceExpression(String name, DataType dataType, int inputIndex, int fieldIndex)

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()
int	getFieldIndex()
int	getInputIndex()
String	getName()
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

FieldReferenceExpression

public FieldReferenceExpression(String name,
                                DataType dataType,
                                int inputIndex,
                                int fieldIndex)

方法详细资料

getName

public String getName()

getInputIndex

public int getInputIndex()

getFieldIndex

public int getFieldIndex()

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