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Robert Schulze 2024-10-14 17:38:11 +00:00
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contrib/usearch vendored

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docs/en/engines/table-engines/mergetree-family/annindexes.md
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@ -139,7 +139,8 @@ clickhouse-client --param_vec='hello' --query="SELECT * FROM table WHERE L2Dista
:::
To search using a different value of HNSW parameter `hnsw_candidate_list_size_for_search` (default: 64), also known as `ef_search` in the
original [HNSW paper](https://doi.org/10.1109/TPAMI.2018.2889473), with `SETTINGS hnsw_candidate_list_size_for_search = <value>`.
original [HNSW paper](https://doi.org/10.1109/TPAMI.2018.2889473), run the `SELECT` query with `SETTINGS hnsw_candidate_list_size_for_search
= <value>`.
**Restrictions**: Approximate algorithms used to determine the nearest neighbors require a limit, hence queries without `LIMIT` clause
cannot utilize ANN indexes. Also, ANN indexes are only used if the query has a `LIMIT` value smaller than setting