org.apache.druid.catalog.model.table

Class ClusterKeySpec

java.lang.Object

org.apache.druid.catalog.model.table.ClusterKeySpec

public class ClusterKeySpec
extends Object

Description of one clustering key (column) for a datasource. Clustering is the process of physically sorting data by a sort key. This class represents one column of that sort key. The key consists of a name and a sort direction. Sort direction is optional: omitted, ascending is assumed. (In Druid, clustering is always NULLS LOW in SQL terms, so that attribute does not appear here.)

Field Summary

Fields

Modifier and Type	Field and Description
static com.fasterxml.jackson.core.type.TypeReference<List<ClusterKeySpec>>	CLUSTER_KEY_LIST_TYPE_REF

Constructor Summary

Constructors

Constructor and Description
ClusterKeySpec(String expr, Boolean desc)

Method Summary

Modifier and Type	Method and Description
boolean	desc()
boolean	equals(Object o)
String	expr()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

CLUSTER_KEY_LIST_TYPE_REF

public static final com.fasterxml.jackson.core.type.TypeReference<List<ClusterKeySpec>> CLUSTER_KEY_LIST_TYPE_REF

Constructor Detail

ClusterKeySpec

public ClusterKeySpec(String expr,
                      @Nullable
                      Boolean desc)

Method Detail

expr

public String expr()

desc

public boolean desc()

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object