FlatVectorsReader
Reads vectors from an index. When searching this reader, it iterates every vector in the index and scores them
This class is useful when:
the number of vectors is small
when used along side some additional indexing structure that can be used to better search the vectors (like HNSW).
Inheritors
Properties
Returns nested resources of this class. The result should be a point-in-time snapshot (to avoid race conditions).
Returns an instance optimized for merging. This instance may only be consumed in the thread that called .getMergeInstance.
Scorer for flat vectors
Functions
Checks consistency of this reader.
Optional: reset or close merge resources used in the reader
Returns the ByteVectorValues for the given field. The behavior is undefined if the given field doesn't have KNN vectors enabled on its FieldInfo. The return value is never null.
Returns the FloatVectorValues for the given field. The behavior is undefined if the given field doesn't have KNN vectors enabled on its FieldInfo. The return value is never null.
Returns a RandomVectorScorer for the given field and target vector.
Return the memory usage of this object in bytes. Negative values are illegal.
Return the k nearest neighbor documents as determined by comparison of their vector values for this field, to the given vector, by the field's similarity function. The score of each document is derived from the vector similarity in a way that ensures scores are positive and that a larger score corresponds to a higher ranking.