PyPI · #2345 most downloaded on PyPI

pylance

12.0.04.0M downloads/molance-format/lance ↗New releases in your daily digest, changelog included.

python wrapper for Lance columnar format

Last release today
17 Sep 2026
Ships fairly regularly
a new release about every 2 weeks
Most releases are documented
notes for 44 of the last 60 stable releases
2 versions withdrawn
withdrawn after publishing
4 years old
193 releases · first in 2022

Release timeline

193 releases since 2022

20222023202420252026

20222026

One column per quarter.

Releases

0.30.019 Jun 2025



What's Changed

Breaking Changes 🛠

feat!: auto-remap indexes before scan by @jackye1995 in https://github.com/lancedb/lance/pull/3971

feat!: move file metadata cache to bytes capacity by @wjones127 in https://github.com/lancedb/lance/pull/3949

New Features 🎉

feat(java): support checkout version by @yanghua in https://github.com/lancedb/lance/pull/3907

feat: wrap FilterExec in LanceFilterExec by @wkalt in https://github.com/lancedb/lance/pull/3939

feat: add storage options for LanceFileReader by @leaves12138 in https://github.com/lancedb/lance/pull/3941

feat: prefix matching for FTS by @BubbleCal in https://github.com/lancedb/lance/pull/3935

feat(java): support list versions and checkout version in Dataset by @majin1102 in https://github.com/lancedb/lance/pull/3945

feat: add a few lance examples in Rust by @HaochengLIU in https://github.com/lancedb/lance/pull/3817

feat: rebase conflict between rewrite and frag reuse index cleanup by @jackye1995 in https://github.com/lancedb/lance/pull/3952

feat(java): support tag operations on Java dataset by @majin1102 in https://github.com/lancedb/lance/pull/3958

feat(java): support restoring to the checked out version by @majin1102 in https://github.com/lancedb/lance/pull/3969

feat: expose update_config api for python by @yanghua in https://github.com/lancedb/lance/pull/3963

feat: support returning tags in order of version with descending order as default by @Jay-ju in https://github.com/lancedb/lance/pull/4001

feat: add support for must_not clause in Boolean queries by @BubbleCal in https://github.com/lancedb/lance/pull/4012

feat: support unenforced primary key concept in schema by @jackye1995 in https://github.com/lancedb/lance/pull/4002

feat: redirect Spark documentation to new lance-spark website by @jackye1995 in https://github.com/lancedb/lance/pull/4032

feat: support enable/disable auto-cleanup by @yanghua in https://github.com/lancedb/lance/pull/4037

feat: add cache stats for new cache by @wjones127 in https://github.com/lancedb/lance/pull/4024

Bug Fixes 🐛

fix: correctly specify schema in encoded substrait for expr by @westonpace in https://github.com/lancedb/lance/pull/3937

fix: newer indices may be read from cache by @BubbleCal in https://github.com/lancedb/lance/pull/3936

fix: null value rows missing after bitmap remap by @jackye1995 in https://github.com/lancedb/lance/pull/3956

fix: rebase transactions from oldest to latest by @jackye1995 in https://github.com/lancedb/lance/pull/3955

fix: typos in documentation comments by @leopardracer in https://github.com/lancedb/lance/pull/3970

fix: call remove_outer_validity() before dictionary_encode by @luohao in https://github.com/lancedb/lance/pull/3974

fix: don't crash when reading index trained on old version by @westonpace in https://github.com/lancedb/lance/pull/3978

fix: handle case in 2.1 writer where lists are masked by null struct by @westonpace in https://github.com/lancedb/lance/pull/3946

fix: don't panic on DF table provider if test has filter on indexed column by @westonpace in https://github.com/lancedb/lance/pull/3954

fix: respect precomputed partitions and shuffle buffers for v3 index by @BubbleCal in https://github.com/lancedb/lance/pull/3910

fix: panic caused by reading empty posting list by @BubbleCal in https://github.com/lancedb/lance/pull/4019

fix: optimize index with no new data by @wjones127 in https://github.com/lancedb/lance/pull/4017

fix: filter out null row ids by @BubbleCal in https://github.com/lancedb/lance/pull/4020

fix: separate loading configuration handling for jieba and lindera by @KazuhitoT in https://github.com/lancedb/lance/pull/3932

fix: reading large fragment reuse index details fails with file not found by @jackye1995 in https://github.com/lancedb/lance/pull/4035

fix: use i32 for dictionary encoding indices by @luohao in https://github.com/lancedb/lance/pull/3898

fix: optimizing FTS causes error if it's without positions by @BubbleCal in https://github.com/lancedb/lance/pull/4044

Other Changes

refactor: change the default process-wide IOPS limit to be 128 by @westonpace in https://github.com/lancedb/lance/pull/3972

New Contributors

@Xuanwo made their first contribution in https://github.com/lancedb/lance/pull/3960

@leopardracer made their first contribution in https://github.com/lancedb/lance/pull/3970

Full Changelog: https://github.com/lancedb/lance/compare/v0.29.0...v0.30.0

0.29.04 Jun 2025

What's Changed

Breaking Changes 🛠

perf!: improve conflict resolution performance by @wjones127 in https://github.com/lancedb/lance/pull/3882
feat!: introduce fragment reuse index to defer compaction index remap by @jackye1995 in https://github.com/lancedb/lance/pull/3847
feat!: add minimum probes and maximum probes to IVF search by @westonpace in https://github.com/lancedb/lance/pull/3903

New Features 🎉

feat: support slop param for phrase query by @BubbleCal in https://github.com/lancedb/lance/pull/3859
feat: enhance NGram index support for large strings by @BubbleCal in https://github.com/lancedb/lance/pull/3893
feat: support boolean query by @BubbleCal in https://github.com/lancedb/lance/pull/3879
feat: enhancing java LanceFileReader by adding projection push down and ranges lookup functionality by @leaves12138 in https://github.com/lancedb/lance/pull/3888
feat: support lance rust log in jni by @frankliee in https://github.com/lancedb/lance/pull/3901
feat: add storage options for LanceFileWriter by @leaves12138 in https://github.com/lancedb/lance/pull/3900
feat: expose auto cleanup config option for pylance by @yanghua in https://github.com/lancedb/lance/pull/3857
feat: update to the latest versions of arrow and datafusion, remove pin on chrono by @westonpace in https://github.com/lancedb/lance/pull/3890
feat: remap an index with fragment reuse index by @jackye1995 in https://github.com/lancedb/lance/pull/3906
feat: ignore indices created in newer format by @BubbleCal in https://github.com/lancedb/lance/pull/3867
feat: trim fragment reuse index after remapping by @jackye1995 in https://github.com/lancedb/lance/pull/3911
feat: add load_index_by_name to reteive a unique index by name by @jackye1995 in https://github.com/lancedb/lance/pull/3931

Bug Fixes 🐛

fix: remove modified fragments indices during horizontal merge_insert by @westonpace in https://github.com/lancedb/lance/pull/3863
fix: last item could be dropped from directory listing by @jackye1995 in https://github.com/lancedb/lance/pull/3892
fix: handle caching with manifest naming scheme migration by @wjones127 in https://github.com/lancedb/lance/pull/3896
fix: deserialize PhraseQuery without slop field by @wjones127 in https://github.com/lancedb/lance/pull/3913
fix: PrimitiveStructualEncoder extract_validity buffer should follow flag keep_original_array by @leaves12138 in https://github.com/lancedb/lance/pull/3899
fix: unexpected posting block size when remap posting list by @BubbleCal in https://github.com/lancedb/lance/pull/3921
fix: some compile error for index by @Jay-ju in https://github.com/lancedb/lance/pull/3920
fix: skip non-leaf fields when projecting by column names in 2.1 by @westonpace in https://github.com/lancedb/lance/pull/3918
fix: prevent and handle empty fragments by @wjones127 in https://github.com/lancedb/lance/pull/3934

Documentation 📚

docs: fix some grammatical errors for operations comments by @majin1102 in https://github.com/lancedb/lance/pull/3930
docs: add field encoding spec by @Jay-ju in https://github.com/lancedb/lance/pull/3820
docs: add ray distributed merge columns by @Jay-ju in https://github.com/lancedb/lance/pull/3919

Performance Improvements 🚀

perf: remove the unnecessary copying while indexing PQ by @BubbleCal in https://github.com/lancedb/lance/pull/3894

New Contributors

@leaves12138 made their first contribution in https://github.com/lancedb/lance/pull/3888

Full Changelog: https://github.com/lancedb/lance/compare/v0.28.0...v0.29.0

Open source →

0.28.027 May 2025

What's Changed

Breaking Changes 🛠

perf!: introduce compression and new indexing algo for FTS by @BubbleCal in https://github.com/lancedb/lance/pull/3720
feat!: remove Spark module in favor of the lance-spark repo by @jackye1995 in https://github.com/lancedb/lance/pull/3700

New Features 🎉

feat: allow FTS and NGRAM index to co-exist on the same column by @westonpace in https://github.com/lancedb/lance/pull/3856
feat: add columns msg for count_rows by @Jay-ju in https://github.com/lancedb/lance/pull/3850
feat: auto conflict resolution for upsert by @jackye1995 in https://github.com/lancedb/lance/pull/3865
feat(java): automatically add JDK17 JVM args by @jackye1995 in https://github.com/lancedb/lance/pull/3873
feat: auto-set S3 express and fix list ordering setting by @jackye1995 in https://github.com/lancedb/lance/pull/3870

Bug Fixes 🐛

fix: the error that the blob field requires a project by @Jay-ju in https://github.com/lancedb/lance/pull/3745
fix: ensure to_batches output strictly adheres to configured batch size by @Jay-ju in https://github.com/lancedb/lance/pull/3808
fix: remove incorrect S3 commit documentation by @jackye1995 in https://github.com/lancedb/lance/pull/3869
fix: update lindera to 0.40.2 and correct outdated URL by @KazuhitoT in https://github.com/lancedb/lance/pull/3852
fix: pytorch demo doc format by @Jay-ju in https://github.com/lancedb/lance/pull/3860
fix: use e_tag in cache key for cached manifests by @wjones127 in https://github.com/lancedb/lance/pull/3881

Documentation 📚

docs: add safe dataloader for lance dataset by @Jay-ju in https://github.com/lancedb/lance/pull/3821

New Contributors

@KazuhitoT made their first contribution in https://github.com/lancedb/lance/pull/3852

Full Changelog: https://github.com/lancedb/lance/compare/v0.27.2...v0.28.0

Open source →

0.27.219 May 2025

What's Changed

New Features 🎉

feat(java): support adding columns by schema and field definitions by @majin1102 in https://github.com/lancedb/lance/pull/3795

Bug Fixes 🐛

fix: update size of data file in data replacement operation by @westonpace in https://github.com/lancedb/lance/pull/3839
fix: solve cargo fmt check error under java/core/java-jni by @majin1102 in https://github.com/lancedb/lance/pull/3845
fix: allow nulls when blob data files are missing by @westonpace in https://github.com/lancedb/lance/pull/3843

Documentation 📚

docs: fix typos by @upczsh in https://github.com/lancedb/lance/pull/3819

New Contributors

@upczsh made their first contribution in https://github.com/lancedb/lance/pull/3819
@majin1102 made their first contribution in https://github.com/lancedb/lance/pull/3795

Full Changelog: https://github.com/lancedb/lance/compare/v0.27.1...v0.27.2

Open source →

pylance

Release timeline

Releases

What's Changed

Breaking Changes 🛠

New Features 🎉

Bug Fixes 🐛

Other Changes

New Contributors

What's Changed

Breaking Changes 🛠

New Features 🎉

Bug Fixes 🐛

Documentation 📚

Performance Improvements 🚀

New Contributors

What's Changed

Breaking Changes 🛠

New Features 🎉

Bug Fixes 🐛

Documentation 📚

New Contributors

What's Changed

New Features 🎉

Bug Fixes 🐛

Documentation 📚

New Contributors

What's Changed

New Features 🎉

Bug Fixes 🐛