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Ensure we return non-negative scores when scoring scalar dot-products #108522

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May 13, 2024
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Ensure we return non-negative scores when scoring scalar dot-products #108522

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be7bf05
Ensure we return non-negative scores when scoring scalar dot-products
benwtrent May 10, 2024
958b607
Update docs/changelog/108522.yaml
benwtrent May 10, 2024
b69a9d1
Merge branch 'main' into ensure-positive-scores-dot-product
elasticmachine May 10, 2024
5858053
Adding tests
benwtrent May 13, 2024
ec90de5
Merge remote-tracking branch 'upstream/main' into ensure-positive-sco…
benwtrent May 13, 2024
2835361
Merge branch 'ensure-positive-scores-dot-product' of github.com:benwt…
benwtrent May 13, 2024
8cd2021
Merge branch 'main' into ensure-positive-scores-dot-product
elasticmachine May 13, 2024
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5 changes: 5 additions & 0 deletions docs/changelog/108522.yaml
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@@ -0,0 +1,5 @@
pr: 108522
summary: Ensure we return non-negative scores when scoring scalar dot-products
area: Vector Search
type: bug
issues: []
4 changes: 2 additions & 2 deletions libs/vec/src/main21/java/org/elasticsearch/vec/internal/Int7DotProduct.java
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Expand Up @@ -48,9 +48,9 @@ public float score(int firstOrd, int secondOrd) throws IOException {
if (firstSeg != null && secondSeg != null) {
int dotProduct = dotProduct7u(firstSeg, secondSeg, length);
float adjustedDistance = dotProduct * scoreCorrectionConstant + firstOffset + secondOffset;
return (1 + adjustedDistance) / 2;
return Math.max((1 + adjustedDistance) / 2, 0f);
} else {
return fallbackScore(firstByteOffset, secondByteOffset);
return Math.max(fallbackScore(firstByteOffset, secondByteOffset), 0f);
}
}
}