benwtrent commented on issue #12627:
URL: https://github.com/apache/lucene/issues/12627#issuecomment-2033080335
@msokolov in the HNSW codec, we do something like this already when
gathering the underlying graph.
I would do something like:
```
if (FilterLeafReader.unwrap(ctx.reader()) instanceof CodecReader
codecReader) {
KnnVectorsReader currKnnVectorsReader = codecReader.getVectorReader();
if (currKnnVectorsReader instanceof PerFieldKnnVectorsFormat.FieldsReader
perFields) {
currKnnVectorsReader = perFields.get(vectorField);
}
if (currKnnVectorsReader instanceof HnswGraphProvider graphProvider) {
if (HnswTestUtil.isFullyConnected(graphProvider.getGraph(vectorField))
== false) {
// for now just bail out.
return;
}
}
}
```
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