Add k-NN Faiss filtering documentation (opensearch-project#4476)

* Add k-NN Faiss filtering documentation Signed-off-by: Fanit Kolchina <[email protected]> * Move the note Signed-off-by: Fanit Kolchina <[email protected]> * Add faiss and a filter table Signed-off-by: Fanit Kolchina <[email protected]> * Refactor boolean filtering section Signed-off-by: Fanit Kolchina <[email protected]> * Clarified that Faiss works with hnsw only Signed-off-by: Fanit Kolchina <[email protected]> * Add more Faiss filtering information Signed-off-by: Fanit Kolchina <[email protected]> * Apply suggestions from code review Co-authored-by: Melissa Vagi <[email protected]> Signed-off-by: kolchfa-aws <[email protected]> * Apply suggestions from code review Co-authored-by: Nathan Bower <[email protected]> Signed-off-by: kolchfa-aws <[email protected]> * Update _search-plugins/knn/filter-search-knn.md Co-authored-by: Nathan Bower <[email protected]> Signed-off-by: kolchfa-aws <[email protected]> * Implemented editorial comments Signed-off-by: Fanit Kolchina <[email protected]> * Implemented one more editorial comment Signed-off-by: Fanit Kolchina <[email protected]> --------- Signed-off-by: Fanit Kolchina <[email protected]> Signed-off-by: kolchfa-aws <[email protected]> Co-authored-by: Melissa Vagi <[email protected]> Co-authored-by: Nathan Bower <[email protected]>
harshavamsi · Oct 31, 2023 · 5572a74 · 5572a74
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diff --git a/_search-plugins/knn/approximate-knn.md b/_search-plugins/knn/approximate-knn.md
@@ -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/).
 
 ## Spaces