This blog post shows a preview of DuckDB’s new vss extension, which introduces support for HNSW (Hierarchical Navigable Small Worlds) indexes to accelerate vector similarity search.

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The blog post introduces the vss extension in DuckDB, which adds support for vector similarity search using HNSW indexes. It explains the motivation behind adding the ARRAY data type and the new distance metric functions, as well as the implementation and limitations of the vss extension.

Vector Similarity Search in DuckDB

The Vector Similarity Search (VSS) Extension