| Unset Class |
The Unset class represents a unspecified value.
Remarks
In Cassandra 2.2 and above, when executing a UPDATE or INSERT query, a parameter can be unset. Designed to avoid tombstones, setting a parameter value to Unset will make Cassandra to ignore it.
Remarks
In some cases, we might be inserting rows using null for values that are not specified, and even though our intention is to leave the value empty, Cassandra will represent it as a tombstone causing an unnecessary overhead.
To avoid tombstones, in previous versions of Cassandra, you can use different query combinations only containing the fields that have a value.
The Unset type is a singleton class, which means only one Unset object exists. The Unset.Value member represents the sole Unset object.
Inheritance HierarchySystemObject
CassandraUnset
CassandraUnset
Namespace: Cassandra
Assembly: Cassandra (in Cassandra.dll) Version: 3.2.0
SyntaxC#
public sealed class Unset
The Unset type exposes the following members.
Methods| Name | Description | |
|---|---|---|
 | Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
Fields
See Also