lance-format/lance

[DuckDB] Expose vector search capability via duckdb extension

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#640 opened on Feb 25, 2023

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Description

Problem Statement

Lance rust dataset has the capability of querying over vector space, via Scannner::nearest(..), we should expose this to DuckDB via its extension mechanism. For example, a potential implementation could be a duckdb table function lance_nearest

SELECT id, col 
FROM lance_nearest("table", "vector_column", "query", top_k)
WHERE city = 'SF' and day = "02-03-2023"

Contributor guide

Research direction
Study the DuckDB extension API and understand how table functions are registered. Explore the existing vector search implementation in Lance's Scanner::nearest method. Implement a DuckDB table function that calls this method, handling filters properly.
Tech stack
rust
Domain
backenddatabase
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
RustDuckDB extension API
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30