cpoerschke commented on code in PR #1958:
URL: https://github.com/apache/solr/pull/1958#discussion_r1340538175
##########
solr/core/src/test/org/apache/solr/search/neural/KnnQParserTest.java:
##########
@@ -39,7 +39,7 @@ public class KnnQParserTest extends SolrTestCaseJ4 {
@Before
public void prepareIndex() throws Exception {
/* vectorDimension="4" similarityFunction="cosine" */
- initCore("solrconfig-basic.xml", "schema-densevector.xml");
+ initCore("solrconfig_codec.xml", "schema-densevector.xml");
Review Comment:
1/3 I've been looking at the `DenseVectorFieldTest` test and also arrived at
the conclusion that something other than `solrconfig-basic.xml` is needed there
so that `SchemaCodecFactory` is used ...
##########
solr/core/src/java/org/apache/solr/core/SchemaCodecFactory.java:
##########
@@ -145,4 +151,34 @@ public Codec getCodec() {
assert core != null : "inform must be called first";
return codec;
}
+
+ /**
+ * This class exists because Lucene95HnswVectorsFormat's getMaxDimensions
method is final and we
+ * need to workaround that constraint to allow more than the default number
of dimensions
+ */
Review Comment:
3/3 ... this is a nice workaround to get our max dimensions.
Perhaps overengineering but something like
https://github.com/apache/lucene/blob/releases/lucene/9.8.0/lucene/core/src/test/org/apache/lucene/index/TestFilterCodecReader.java#L30
could be added as a test to ensure all that needs delegating is delegated.
And perhaps the workaround class could be final itself and even private?
Though that is both subjective of course.
##########
solr/core/src/java/org/apache/solr/core/SchemaCodecFactory.java:
##########
@@ -127,7 +132,8 @@ public KnnVectorsFormat getKnnVectorsFormatForField(String
field) {
if (DenseVectorField.HNSW_ALGORITHM.equals(knnAlgorithm)) {
int maxConn = vectorType.getHnswMaxConn();
int beamWidth = vectorType.getHnswBeamWidth();
- return new Lucene95HnswVectorsFormat(maxConn, beamWidth);
+ var delegate = new Lucene95HnswVectorsFormat(maxConn,
beamWidth);
+ return new SolrDelegatingKnnVectorsFormat(delegate,
vectorType.getDimension());
Review Comment:
2/3 ... but then yes we get to here but `Lucene95HnswVectorsFormat` being
final about its `getMaxDimensions` is a problem ...
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