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package org.apache.cassandra.db;
import java.nio.ByteBuffer;
The clustering column values for a row.
A Clustering
is a ClusteringPrefix
that must always be "complete", i.e. have as many values as there is clustering columns in the table it is part of. It is the clustering prefix used by rows.
Note however that while it's size must be equal to the table clustering size, a clustering can have null
values, and this mostly for thrift backward compatibility (in practice, if a value is null, all of the following ones will be too because that's what thrift allows, but it's never assumed by the code so we could start generally allowing nulls for clustering columns if we wanted to).
/**
* The clustering column values for a row.
* <p>
* A {@code Clustering} is a {@code ClusteringPrefix} that must always be "complete", i.e. have
* as many values as there is clustering columns in the table it is part of. It is the clustering
* prefix used by rows.
* <p>
* Note however that while it's size must be equal to the table clustering size, a clustering can have
* {@code null} values, and this mostly for thrift backward compatibility (in practice, if a value is null,
* all of the following ones will be too because that's what thrift allows, but it's never assumed by the
* code so we could start generally allowing nulls for clustering columns if we wanted to).
*/
public class BufferClustering extends AbstractBufferClusteringPrefix implements Clustering
{
BufferClustering(ByteBuffer... values)
{
super(Kind.CLUSTERING, values);
}
}