Class KnnQuery

Inheritance
object
QueryBase
FieldNameQueryBase
KnnQuery
Implements
Inherited Members
Namespace: OpenSearch.Client
Assembly: OpenSearch.Client.dll
Syntax
[DataContract]
public class KnnQuery : FieldNameQueryBase, IKnnQuery, IFieldNameQuery, IQuery

Properties

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Conditionless

Declaration
protected override bool Conditionless { get; }
Property Value
Type Description
bool
Overrides
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ExpandNestedDocs

Whether to expand and search over the nested documents of each matching parent document. Supported from OpenSearch 2.19.

Declaration
public bool? ExpandNestedDocs { get; set; }
Property Value
Type Description
bool?
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Filter

The result restriction filter query.

Declaration
public IQueryContainer Filter { get; set; }
Property Value
Type Description
IQueryContainer
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K

The number of neighbors the search of each graph will return.

Declaration
public int? K { get; set; }
Property Value
Type Description
int?
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MaxDistance

The maximum physical vector space distance required in order for a neighbor to be considered a hit.

Declaration
public float? MaxDistance { get; set; }
Property Value
Type Description
float?
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MethodParameters

Additional engine-specific parameters that control the approximate k-NN search at query time, such as ef_search (HNSW) or nprobes (IVF). Supported from OpenSearch 2.16.

Declaration
public IDictionary<string, object> MethodParameters { get; set; }
Property Value
Type Description
IDictionary<string, object>
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MinScore

The minimum similarity score required in order for a neighbor to be considered a hit.

Declaration
public float? MinScore { get; set; }
Property Value
Type Description
float?
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Rescore

Controls the rescoring of approximate k-NN search results using full-precision vectors. Pass a bool to enable or disable rescoring, or a KnnQueryRescoreContext to configure it. Supported from OpenSearch 2.17.

Declaration
public Union<bool, KnnQueryRescoreContext> Rescore { get; set; }
Property Value
Type Description
Union<bool, KnnQueryRescoreContext>
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Vector

The vector to search for.

Declaration
public float[] Vector { get; set; }
Property Value
Type Description
float[]

Implements

Extension Methods