org.apache.druid.segment.join.filter.rewrite

Class RhsRewriteCandidate

java.lang.Object

org.apache.druid.segment.join.filter.rewrite.RhsRewriteCandidate

public class RhsRewriteCandidate
extends Object

A candidate is an RHS column that appears in a filter, along with the value being filtered on, plus the joinable clause associated with the table that the RHS column is from.

Constructor Summary

Constructors

Constructor and Description
RhsRewriteCandidate(JoinableClause joinableClause, String rhsColumn, String valueForRewrite, boolean isDirectRewrite)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
JoinableClause	getJoinableClause()
String	getRhsColumn()
String	getValueForRewrite()
int	hashCode()
boolean	isDirectRewrite() A direct rewrite occurs when we filter on an RHS column that is also part of a join equicondition.

Methods inherited from class java.lang.Object

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

Constructor Detail

RhsRewriteCandidate

public RhsRewriteCandidate(@Nonnull
                           JoinableClause joinableClause,
                           String rhsColumn,
                           @Nullable
                           String valueForRewrite,
                           boolean isDirectRewrite)

Method Detail

getJoinableClause

@Nonnull
public JoinableClause getJoinableClause()

getRhsColumn

public String getRhsColumn()

getValueForRewrite

@Nullable
public String getValueForRewrite()

isDirectRewrite

public boolean isDirectRewrite()

A direct rewrite occurs when we filter on an RHS column that is also part of a join equicondition. For example, if we have the filter (j.x = 'hello') and the join condition is (y = j.x), we can directly rewrite the j.x filter to (y = 'hello').

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object