org.apache.flink.table.expressions

Class UnresolvedCallExpression

java.lang.Object

org.apache.flink.table.expressions.UnresolvedCallExpression

All Implemented Interfaces:

org.apache.flink.table.expressions.Expression

@PublicEvolving
public final class UnresolvedCallExpression
extends Object
implements org.apache.flink.table.expressions.Expression

Unresolved call expression for calling a function identified by a FunctionDefinition.

This is purely an API facing expression with unvalidated arguments and unknown output data type.

A unresolved call contains:

• a FunctionDefinition that identifies the function to be called
• an optional FunctionIdentifier that tracks the origin of a function
• whether the called function is temporary

Method Summary

Modifier and Type	Method and Description
<R> R	accept(org.apache.flink.table.expressions.ExpressionVisitor<R> visitor)
String	asSummaryString()
boolean	equals(Object o)
List<org.apache.flink.table.expressions.Expression>	getChildren()
org.apache.flink.table.functions.FunctionDefinition	getFunctionDefinition()
Optional<org.apache.flink.table.functions.FunctionIdentifier>	getFunctionIdentifier()
int	hashCode()
UnresolvedCallExpression	replaceArgs(List<org.apache.flink.table.expressions.Expression> args)
org.apache.flink.table.expressions.CallExpression	resolve(List<org.apache.flink.table.expressions.ResolvedExpression> args, org.apache.flink.table.types.DataType dataType)
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

getFunctionIdentifier

public Optional<org.apache.flink.table.functions.FunctionIdentifier> getFunctionIdentifier()

getFunctionDefinition

public org.apache.flink.table.functions.FunctionDefinition getFunctionDefinition()

replaceArgs

public UnresolvedCallExpression replaceArgs(List<org.apache.flink.table.expressions.Expression> args)

resolve

public org.apache.flink.table.expressions.CallExpression resolve(List<org.apache.flink.table.expressions.ResolvedExpression> args,
                                                                 org.apache.flink.table.types.DataType dataType)

asSummaryString

public String asSummaryString()

Specified by:

asSummaryString in interface org.apache.flink.table.expressions.Expression

getChildren

public List<org.apache.flink.table.expressions.Expression> getChildren()

Specified by:

getChildren in interface org.apache.flink.table.expressions.Expression

accept

public <R> R accept(org.apache.flink.table.expressions.ExpressionVisitor<R> visitor)

Specified by:

accept in interface org.apache.flink.table.expressions.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