org.apache.flink.table.expressions

Class UnresolvedReferenceExpression

java.lang.Object

org.apache.flink.table.expressions.UnresolvedReferenceExpression

All Implemented Interfaces:

Expression

@PublicEvolving
public final class UnresolvedReferenceExpression
extends Object
implements Expression

An unresolved reference to a field, table, or local reference.

This is a purely API facing expression that will be resolved into FieldReferenceExpression, LocalReferenceExpression, or TableReferenceExpression.

Method Summary

Modifier and Type	Method and Description
<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()
String	getName()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

getName

public String getName()

asSummaryString

public String asSummaryString()

Description copied from interface: Expression

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

Specified by:

asSummaryString in interface Expression

Returns:

summary string of this expression for debugging purposes

getChildren

public List<Expression> getChildren()

Specified by:

getChildren in interface Expression

accept

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

Specified by:

accept in interface Expression

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object