ChrisHegarty commented on code in PR #13355:
URL: https://github.com/apache/lucene/pull/13355#discussion_r1596969665
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lucene/core/src/java/org/apache/lucene/codecs/hnsw/DefaultFlatVectorScorer.java:
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@@ -101,7 +102,9 @@ private ByteScoringSupplier(
@Override
public RandomVectorScorer scorer(int ord) throws IOException {
- return new ByteVectorScorer(vectors2, vectors1.vectorValue(ord),
similarityFunction);
+ byte[] ba = vectors1.vectorValue(ord);
+ return new ByteVectorScorer(
+ vectors2, ArrayUtil.copyOfSubArray(ba, 0, ba.length),
similarityFunction);
Review Comment:
Good catch. The prior implementation stored the ord rather than the vector
bytes. We should do the same here, which will avoid the copy. The scorers (not
the supplier), do not suffer a similar issue, since their API doe not allow to
score against anything other than the first vector.
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