Alessandro Benedetti created SOLR-17815:
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Summary: Add support for ACORN-based filtering in vector search
Key: SOLR-17815
URL: https://issues.apache.org/jira/browse/SOLR-17815
Project: Solr
Issue Type: Sub-task
Reporter: Alessandro Benedetti
An interesting paper in this area: https://arxiv.org/abs/2403.04871
ACORN: Performant and Predicate-Agnostic Search Over Vector Embeddings and
Structured Data
Liana Patel, Peter Kraft, Carlos Guestrin, Matei Zaharia
This was implemented in Lucene in https://github.com/apache/lucene/pull/14160
Specifically in org.apache.lucene.util.hnsw.FilteredHnswGraphSearcher
that can be used in Solr via org.apache.lucene.search.knn.KnnSearchStrategy.Hnsw
/**
* Create a new Hnsw strategy
*
* @param filteredSearchThreshold threshold for filtered search, a
percentage value from 0 to
* 100 where 0 means never use filtered search and 100 means always use
filtered search.
*/
public Hnsw(int filteredSearchThreshold) {
if (filteredSearchThreshold < 0 || filteredSearchThreshold > 100) {
throw new IllegalArgumentException("filteredSearchThreshold must be >=
0 and <= 100");
}
this.filteredSearchThreshold = filteredSearchThreshold;
}
We may pass an additional parameter to disable it (filteredSearchThreshold=0),
the default is:
public static final int DEFAULT_FILTERED_SEARCH_THRESHOLD = 60;
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