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lance-format

14 indexed repositories · View on GitHub

lance
Open Lakehouse Format for Multimodal AI. Convert from Parquet in 2 lines of code for 100x faster random access, vector index, and data ve...

Rust · 7093 stars
lance-graph
Run Graph Queries with Lance

Rust · 179 stars
lance-duckdb
The lance extensions for DuckDB enable reading and writing of lance tables.

C++ · 126 stars
lance-context
Manage Multimodal Agentic Context Lifecycle with Lance

Rust · 81 stars
lance-spark
Spark integrations for working with Lance datasets

Java · 66 stars
lance-data-viewer
Browse Lance tables from your local machine in a simple web UI. No database to set up. Mount a folder and go.

Python · 60 stars
lance-namespace
Lance Namespace is an open specification for describing access and operations against a collection of tables in a multimodal lakehouse

Java · 59 stars
lance-ray
Integration between Lance and Ray for distributed data processing

Python · 41 stars
pglance
PostgreSQL Lance Table Extension

Rust · 28 stars
lance-trino
Trino Lance Connector

Java · 22 stars
lance-flink
Apache Flink Connector for Lance Vector Database

Java · 12 stars
lance-namespace-impls
Lance Namespace Implementations - Apache Hive, Apache Polaris, Apache Gravitino, Unity Catalog, AWS Glue and more

Java · 11 stars
lance-c
The C binding to Lance.

Rust · 5 stars
lance-cuvs
cuVS-backed vector build backend for Lance

Rust · 3 stars

Beginner friendly Everything

Open All

JsonIndexDetails cannot represent target_data_type, so details are insufficient to rebuild a JSON index Open

lance-format/lance#9256 · 2 comments · 1 assignee · Opened Sep 15, 2026
§5.3 Row ID sequences spill to data files as a hidden column Open

lance-format/lance#9250 · 1 assignee · Opened Sep 15, 2026
Upsert sink production hardening: hot-key metrics and Arrow allocator caps Open

enhancement performance

Difficulty 4/5 3-5 days Newbie friendliness 38/100

lance-format/lance-flink#81 · Opened Sep 15, 2026
Single source of truth for connector option classification; retire dot-namespace UNSET heuristic Open

chore enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

lance-format/lance-flink#80 · Opened Sep 15, 2026
Consume Flink TableChange in LanceCatalog#alterTable instead of inferring from SchemaDiff Open

bug enhancement

Difficulty 4/5 3-5 days Newbie friendliness 68/100

lance-format/lance-flink#79 · Opened Sep 15, 2026
Replace SQL-string DELETE predicate with typed key encoding in LanceUpsertSink Open

enhancement feat/delete

Difficulty 4/5 3-5 days Newbie friendliness 48/100

lance-format/lance-flink#78 · Opened Sep 15, 2026
[Feature] Push Lance JSON Spark UDFs into Lance JSONB scans Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

lance-format/lance-spark#829 · Opened Sep 15, 2026
bug: compaction fails determinstically on a very small-fragment dataset Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

lance-format/lance#9224 · Opened Sep 14, 2026
bug: arrow offset overflow Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

lance-format/lance#9223 · 1 comment · 1 reaction · Opened Sep 14, 2026
bug: a legacy Delete reinstates a data file a concurrent Project pruned Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 68/100

lance-format/lance#9217 · 2 comments · Opened Sep 14, 2026
bug: OSS branch listing omits names containing slashes Open

bug performance

Difficulty 3/5 1-2 days Newbie friendliness 48/100

lance-format/lance#9197 · Opened Sep 14, 2026
Proposal: reusable distributed vector search for online and batch workloads Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

lance-format/lance-ray#5292 · 1 comment · Opened Sep 13, 2026
feat(namespace): support explicit result ordering and queries without vectors Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

lance-format/lance-namespace#365 · Opened Sep 12, 2026
[bug]write_fragment retries can silently return incomplete data Open

Difficulty 3/5 1-2 days Newbie friendliness 74/100

lance-format/lance-ray#5290 · Opened Sep 12, 2026
Fragment.take fails on non-monotonic offsets: "Encoding I/O returned N results for M requested range chunks" Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

lance-format/lance#9157 · Opened Sep 11, 2026
`optimize_indices` cannot extend a scalar index created over a nested field of an empty dataset Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 72/100

lance-format/lance#9145 · Opened Sep 11, 2026
Support of `take()` method for `LanceScanner` Open

feature

Difficulty 3/5 1-2 days Newbie friendliness 64/100

lance-format/lance#9142 · 3 comments · Opened Sep 11, 2026
feat(namespace): preserve Retry-After metadata on ThrottlingError Open

Difficulty 3/5 1-2 days Newbie friendliness 64/100

lance-format/lance-namespace#364 · Opened Sep 11, 2026
bug(fts): limit/offset pagination skips and repeats equal-score results (Node 0.38/0.39 preview) Open

bug performance

Difficulty 5/5 Over a week Newbie friendliness 28/100

lance-format/lance#9132 · Opened Sep 10, 2026
feature: support cross-column vector refinement Open

feature performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

lance-format/lance#9126 · 5 comments · Opened Sep 10, 2026
feat(namespace): preserve Retry-After metadata on ThrottlingError Open

A-namespace enhancement feature good first issue

Difficulty 4/5 3-5 days Newbie friendliness 55/100

lance-format/lance#9113 · 6 comments · 1 reaction · Opened Sep 10, 2026
feature: support _rowoffset in scan filters beyond the IN-list take lowering Open

feature

Difficulty 3/5 1-2 days Newbie friendliness 72/100

lance-format/lance#9105 · Opened Sep 9, 2026
bug: row-address mask cache can serve a previous dataset's allow-list at the same URI Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

lance-format/lance#9079 · Opened Sep 9, 2026
bug(overlay): struct cell validity is not replaced by a data overlay Open

bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

lance-format/lance#9077 · Opened Sep 9, 2026
feature: support writing external blob v2 references Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

lance-format/lance-spark#816 · Opened Sep 9, 2026
feature: support writing arrays of blob v2 values Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 58/100

lance-format/lance-spark#815 · Opened Sep 9, 2026
bug: orphaned staging manifests in _versions/ are never garbage collected Open

bug

lance-format/lance#9061 · 1 comment · 1 assignee · Opened Sep 8, 2026
bug: FTS corpus statistics depend on the query filter and index coverage Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 62/100

lance-format/lance#9058 · 1 comment · Opened Sep 8, 2026
bug: Substrait expression transport cannot encode predicates on FixedSizeList columns Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

lance-format/lance#9056 · Opened Sep 8, 2026
bug: Windows CI flake - pytest-xdist workers race on the shared torchinductor cache Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

lance-format/lance#9055 · Opened Sep 8, 2026
MERGE INTO ignores an unenforced primary key: concurrent inserts of the same new keys duplicate rows Open

Difficulty 4/5 3-5 days Newbie friendliness 62/100

lance-format/lance-spark#812 · Opened Sep 7, 2026
perf: benchmark column-statistics collection, maintenance, and retrieval at scale Open

performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

lance-format/lance#9047 · Opened Sep 7, 2026
feature: resolve column statistics across index and seed coverage Open

feature

Difficulty 5/5 Over a week Newbie friendliness 35/100

lance-format/lance#9046 · Opened Sep 7, 2026
feature: incrementally consolidate and backfill column statistics Open

feature performance

Difficulty 5/5 Over a week Newbie friendliness 30/100

lance-format/lance#9045 · Opened Sep 7, 2026
feature: share multi-column ZoneMap storage for column statistics Open

feature

Difficulty 5/5 Over a week Newbie friendliness 30/100

lance-format/lance#9044 · Opened Sep 7, 2026
Support safe concurrent publication of derived columns in the same fragment Open

feature

lance-format/lance#9043 · 1 assignee · Opened Sep 7, 2026
feature: Adopt rerun-io/lance-fuzz for continuous stateful dataset fuzzing Open

bug feature performance

Difficulty 5/5 Over a week Newbie friendliness 32/100

lance-format/lance#9039 · 5 comments · 3 reactions · Opened Sep 7, 2026
bug: MemWAL LSM scan fails with page_lookup.lance Not found after pk-only flush (flush publishes SSTable before pk sidecar exists) Open

bug performance

Difficulty 4/5 3-5 days Newbie friendliness 58/100

lance-format/lance#9035 · Opened Sep 7, 2026
bug: binary_quantization appends a spurious byte when the length is a multiple of 8 Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

lance-format/lance#9028 · Opened Sep 7, 2026
bug: KMeans panics on cosine over a float column instead of rejecting it Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

lance-format/lance#9026 · Opened Sep 7, 2026
bug: BM25 FTS query attempts ~96 GiB allocation and aborts in `InvertedIndex::bm25_search_modern_candidates` (regression vs lance 10) Open

bug performance

Difficulty 4/5 3-5 days Newbie friendliness 38/100

lance-format/lance#9016 · Opened Sep 5, 2026
Add Blob V2 to the Spec Open

A-format

lance-format/lance#9014 · 1 reaction · 1 assignee · Opened Sep 4, 2026
bug: row_range panics where partition_size returns 0 for an absent partition Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

lance-format/lance#9012 · Opened Sep 4, 2026
bug: create_index silently ignores num_partitions when ivf_centroids_file is given Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 64/100

lance-format/lance#9008 · Opened Sep 4, 2026
bug: an out-of-range precomputed partition id panics the IVF_PQ build Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 68/100

lance-format/lance#9003 · Opened Sep 4, 2026
Blob v2: how to read payload bytes from C? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

lance-format/lance-c#76 · 1 comment · Opened Sep 4, 2026
[design risk] DELETE is silently dropped when +I(k) and -D(k) arrive in the same checkpoint Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

lance-format/lance-flink#74 · Opened Sep 4, 2026
Enable Fragment Reuse Index even when SRID is enabled Open

feature

Difficulty 5/5 Over a week Newbie friendliness 30/100

lance-format/lance#8977 · Opened Sep 3, 2026
Commit precondition on cells not changing. Open

feature

Difficulty 4/5 3-5 days Newbie friendliness 55/100

lance-format/lance#8976 · 3 comments · Opened Sep 3, 2026
Use FragmentSlice for zone-level zonemap pruning Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

lance-format/lance-spark#806 · Opened Sep 3, 2026

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