lance-format/lance

[DuckDB] Filters pushdown via native lance reader (`lance_scan`)

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#353 opened on Dec 5, 2022

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duckdbenhancementgood first issuerust

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Description

DuckDB's C API doesn't seems to support filter pushdown, but the C++ one seems to have good support:

https://github.com/duckdb/duckdb/blob/239f51293c429168774c3943e96ddf2451253a07/src/include/duckdb/function/table_function.hpp#L253-L255

It sounds like we can even tell DuckDB which filters we support dynamically.

Contributor guide

Research direction
Investigate DuckDB's C++ table function API for filter pushdown and implement native filter support in lance scan.
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.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
RustDuckDBC++
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40