com.facebook.presto.spi.relation

Class RowExpression

java.lang.Object

com.facebook.presto.spi.relation.RowExpression

Direct Known Subclasses:

CallExpression, ConstantExpression, InputReferenceExpression, LambdaDefinitionExpression, SpecialFormExpression, VariableReferenceExpression

public abstract class RowExpression
extends Object

Constructor Summary

Constructors

Constructor and Description
RowExpression()
RowExpression(Optional<SourceLocation> sourceLocation)

Method Summary

Modifier and Type	Method and Description
abstract <R,C> R	accept(RowExpressionVisitor<R,C> visitor, C context)
abstract RowExpression	canonicalize()
abstract boolean	equals(Object other)
Optional<SourceLocation>	getSourceLocation()
abstract Type	getType()
abstract int	hashCode()
abstract String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RowExpression

public RowExpression(Optional<SourceLocation> sourceLocation)

RowExpression

public RowExpression()

Method Detail

getSourceLocation

public Optional<SourceLocation> getSourceLocation()

getType

public abstract Type getType()

equals

public abstract boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public abstract int hashCode()

Overrides:

hashCode in class Object

toString

public abstract String toString()

Overrides:

toString in class Object

accept

public abstract <R,C> R accept(RowExpressionVisitor<R,C> visitor,
                               C context)

canonicalize

public abstract RowExpression canonicalize()

Returns:

Canonical form of RowExpression by removing non-critical information from the node, like source location. Does NOT canonicalize the child expressions.