io.delta.kernel.expressions

Class LeafExpression

java.lang.Object

io.delta.kernel.expressions.LeafExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

Column, Literal

public abstract class LeafExpression
extends java.lang.Object
implements Expression

An Expression with no children.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	LeafExpression()

Method Summary

Modifier and Type	Method and Description
java.util.List<Expression>	children()
abstract boolean	equals(java.lang.Object o)
abstract int	hashCode()
java.util.Set<java.lang.String>	references()

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.delta.kernel.expressions.Expression

dataType, eval, toString

Constructor Detail

LeafExpression

protected LeafExpression()

Method Detail

children

public java.util.List<Expression> children()

Specified by:

children in interface Expression

Returns:

a List of the immediate children of this node

references

public java.util.Set<java.lang.String> references()

Specified by:

references in interface Expression

Returns:

the names of columns referenced by this expression.

equals

public abstract boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public abstract int hashCode()

Overrides:

hashCode in class java.lang.Object