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Add k-NN Faiss filtering documentation #4476

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merged 12 commits into from
Jul 18, 2023
Merged

Add k-NN Faiss filtering documentation #4476

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a6a1f83
Add k-NN Faiss filtering documentation
kolchfa-aws Jul 3, 2023
467cbb6
Merge branch 'main' into knn-filter-update
kolchfa-aws Jul 6, 2023
a76c5cb
Move the note
kolchfa-aws Jul 6, 2023
1d0eb6c
Add faiss and a filter table
kolchfa-aws Jul 7, 2023
6686582
Refactor boolean filtering section
kolchfa-aws Jul 7, 2023
01dc37c
Clarified that Faiss works with hnsw only
kolchfa-aws Jul 16, 2023
03c1d01
Add more Faiss filtering information
kolchfa-aws Jul 17, 2023
f13f7c8
Apply suggestions from code review
kolchfa-aws Jul 17, 2023
5ee7ccc
Apply suggestions from code review
kolchfa-aws Jul 18, 2023
0b0779a
Update _search-plugins/knn/filter-search-knn.md
kolchfa-aws Jul 18, 2023
85375ee
Implemented editorial comments
kolchfa-aws Jul 18, 2023
b77debd
Implemented one more editorial comment
kolchfa-aws Jul 18, 2023
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24 changes: 1 addition & 23 deletions _search-plugins/knn/approximate-knn.md
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Expand Up @@ -242,30 +242,8 @@ POST _bulk
After data is ingested, it can be search just like any other `knn_vector` field!

### Using approximate k-NN with filters
If you use the `knn` query alongside filters or other clauses (e.g. `bool`, `must`, `match`), you might receive fewer than `k` results. In this example, `post_filter` reduces the number of results from 2 to 1:

```json
GET my-knn-index-1/_search
{
"size": 2,
"query": {
"knn": {
"my_vector2": {
"vector": [2, 3, 5, 6],
"k": 2
}
}
},
"post_filter": {
"range": {
"price": {
"gte": 5,
"lte": 10
}
}
}
}
```
To learn about using filters with k-NN search, see [k-NN search with filters]({{site.url}}{{site.baseurl}}/search-plugins/knn/filter-search-knn/).

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