Package org.apache.druid.segment.join

Class Equality

java.lang.Object

org.apache.druid.segment.join.Equality

public class Equality
extends Object

Represents a join condition between a left-hand-side expression (leftExpr) and a right-hand-side direct column access (rightColumn). This is a particularly interesting kind of condition because it can be resolved using a hashtable on the right-hand side. Note that this class does not override "equals" or "hashCode". This is because Expr also does not.

Constructor Summary

Constructors

Constructor	Description
Equality(Expr leftExpr, String rightColumn, boolean includeNull)

Method Summary

Modifier and Type	Method	Description
Expr	getLeftExpr()
String	getRightColumn()
boolean	isIncludeNull()	Whether null is treated as a value that can be equal to itself.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

Equality

public Equality(Expr leftExpr,
 String rightColumn,
 boolean includeNull)

Method Details

getLeftExpr

public Expr getLeftExpr()

getRightColumn

public String getRightColumn()

isIncludeNull

public boolean isIncludeNull()

Whether null is treated as a value that can be equal to itself. True for conditions using "IS NOT DISTINCT FROM", false for conditions using regular equals.

toString

public String toString()

Overrides:

toString in class Object