Re: VectorField renamed to KnnVectorField?

[Michael Wechner]

I was able to update my code

-        FieldType vectorFieldType = 
VectorField.createHnswType(vector.length, 
VectorValues.SimilarityFunction.DOT_PRODUCT, 16, 500);
-        VectorField vectorField = new VectorField(VECTOR_FIELD, vector, 
vectorFieldType);
+        FieldType vectorFieldType = 
KnnVectorField.createFieldType(vector.length, 
VectorSimilarityFunction.DOT_PRODUCT);
+        KnnVectorField vectorField = new KnnVectorField(VECTOR_FIELD, 
vector, vectorFieldType);

and

-            return new TopDocScorer(this, 
context.reader().searchNearestVectors(field, vector, topK, fanout));
+            return new TopDocScorer(this, 
context.reader().searchNearestVectors(field, vector, topK, null));

the indexing and searching works again :-)

Thanks

Michael

Am 01.11.21 um 18:53 schrieb Michael Wechner:
Hi

In May 2021 I have done a Vector Search implementation based on Lucene 
9.0.0-SNAPSHOT with the following code

FieldType vectorFieldType = VectorField.createHnswType(vector.length, 
VectorValues.SimilarityFunction.DOT_PRODUCT,16,500);
VectorField vectorField =new VectorField(VECTOR_FIELD, vector, vectorFieldType);
doc.add(vectorField)

and

class KnnWeightextends Weight {

     KnnWeight() {
         super(KnnQuery.this);
     }

     @Override public Scorer scorer(LeafReaderContext context)throws 
IOException {
         log.debug("Get scorer.");
         return new TopDocScorer(this, 
context.reader().searchNearestVectors(field,vector,topK,fanout));
     }

whereas fanout is of type "int"

I have now updated Lucene source and rebuilt 9.0.0-SNAPSHOT and get various 
compile errors.

I assume VectorField got renamed to KnnVectorField, right?

Does somebody maybe have some sample code how Vector search is being 
implemented with the most recent Lucene code?

Thanks

Michael