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Name	Modified	Size	InfoDownloads / Week
Parent folder
README.md	2026-09-17	22.1 kB	0
v12.0.0 source code.tar.gz	2026-09-17	20.5 MB	0
v12.0.0 source code.zip	2026-09-17	21.7 MB	0
Totals: 3 Items		42.2 MB	0

What's Changed

Breaking Changes 🛠

feat(io)!: paginated directory listing on ObjectStore by @wjones127 in https://github.com/lance-format/lance/pull/8606
perf(mem_wal)!: serve the shard manifest from the store that wrote it by @hamersaw in https://github.com/lance-format/lance/pull/8640
feat(table): predecessor-conditioned publication for external manifest stores by @wkalt in https://github.com/lance-format/lance/pull/8800
feat(namespace)!: accept multiple columns for the merge insert on key by @wjones127 in https://github.com/lance-format/lance/pull/8915
feat: make data file parts serializable by @Xuanwo in https://github.com/lance-format/lance/pull/9072
fix(index)!: do not route json_extract predicates to JSON indices by @westonpace in https://github.com/lance-format/lance/pull/9101

New Features 🎉

feat(java): support segment-based distributed vector search by @summaryzb in https://github.com/lance-format/lance/pull/7169
feat(index): share IVF partition scans across batch vector queries by @sezruby in https://github.com/lance-format/lance/pull/7640
feat(mem_wal): make write backpressure injectable and account index memory by @hamersaw in https://github.com/lance-format/lance/pull/7831
feat(python): add Bitmap binding for RoaringBitmap by @wjones127 in https://github.com/lance-format/lance/pull/7837
feat(python): add LanceDataset.slice() method by @Sapnilb15 in https://github.com/lance-format/lance/pull/8059
fix(mem-wal): resolve writer shard spec identity by @u70b3 in https://github.com/lance-format/lance/pull/8112
feat(python): expose more scanner options on LanceFragment by @keunhong in https://github.com/lance-format/lance/pull/8429
perf(java): reduce fragment statistics allocations by @everySympathy in https://github.com/lance-format/lance/pull/8452
feat(python): expose ObjectStoreProvider registration in pylance by @farazshaikh in https://github.com/lance-format/lance/pull/8522
feat: add mixed data file version capability by @Xuanwo in https://github.com/lance-format/lance/pull/8580
feat: validate mixed V2 data file versions by @Xuanwo in https://github.com/lance-format/lance/pull/8581
feat: support per-operation V2 write targets by @Xuanwo in https://github.com/lance-format/lance/pull/8582
feat: propagate exact V2 versions across dataset operations by @Xuanwo in https://github.com/lance-format/lance/pull/8583
feat: target exact V2 versions in compaction by @Xuanwo in https://github.com/lance-format/lance/pull/8584
feat(cleanup): support cleaning specific dataset versions by @hfutatzhanghb in https://github.com/lance-format/lance/pull/8617
feat: resolve stable file format to 2.2 by @Xuanwo in https://github.com/lance-format/lance/pull/8657
feat: add column slice stitching by @Xuanwo in https://github.com/lance-format/lance/pull/8660
feat: support BinaryView in packed blob writer via iterator-based extraction by @lichuang in https://github.com/lance-format/lance/pull/8700
feat(python): restore index retraining by @ddupg in https://github.com/lance-format/lance/pull/8786
feat(encoding): add CANDIDATE_BATCH_SIZES and plan_decoded_bytes trait defaults by @westonpace in https://github.com/lance-format/lance/pull/8791
feat(java): expose createIndex progress callbacks by @hfutatzhanghb in https://github.com/lance-format/lance/pull/8823
feat(java): align inverted index options by @ddupg in https://github.com/lance-format/lance/pull/8829
feat(mem_wal): let a writer read its own indexed prefix by @hamersaw in https://github.com/lance-format/lance/pull/8835
fix(mem_wal): honor distance_range in the LSM vector planner by @hamersaw in https://github.com/lance-format/lance/pull/8845
feat(python): return matched row offsets from fragment update_columns by @zhangyue19921010 in https://github.com/lance-format/lance/pull/8891
feat(java): expose merge insert write mode by @zhangyue19921010 in https://github.com/lance-format/lance/pull/8918
feat: budget blob materialization readahead by @jackye1995 in https://github.com/lance-format/lance/pull/8919
feat: add caller-managed data file parts by @Xuanwo in https://github.com/lance-format/lance/pull/8923
feat(java): complete transaction operation mappings by @everySympathy in https://github.com/lance-format/lance/pull/8925
feat(index): default ivf_rq to 5-bit quantization by @BubbleCal in https://github.com/lance-format/lance/pull/8936
feat(java): expose referenced file metadata by @everySympathy in https://github.com/lance-format/lance/pull/8962
feat(mem_wal): record what a flushed SSTable holds by @xuanyu-z in https://github.com/lance-format/lance/pull/8981
feat(index): proportional hierarchical k-means for IVF training by @BubbleCal in https://github.com/lance-format/lance/pull/9050
feat(index): split IVF partitions to target size and join undersized ones in one optimize pass by @BubbleCal in https://github.com/lance-format/lance/pull/9051
feat: expose public accessor for the fragment reuse index by @brendanclement in https://github.com/lance-format/lance/pull/9112
feat(dataset): expose lance dataset deep clone to python by @dentiny in https://github.com/lance-format/lance/pull/9181
feat(search): select metric-aware initial IVF probe budgets by @BubbleCal in https://github.com/lance-format/lance/pull/9195

Bug Fixes 🐛

fix: make float filters treat -0.0 and 0.0 as the same value by @LuciferYang in https://github.com/lance-format/lance/pull/6236
fix(arrow): avoid duplicate field when merging identical List<struct> columns by @LuciferYang in https://github.com/lance-format/lance/pull/7494
fix: don't fail dataset open on an undecodable inline transaction by @jackye1995 in https://github.com/lance-format/lance/pull/7740
fix(core): reject non-finite values in AimdConfig::validate by @LuciferYang in https://github.com/lance-format/lance/pull/7942
fix(index): replace scalar cache entries on store rotation by @u70b3 in https://github.com/lance-format/lance/pull/7962
fix: validate primary key nullability on every path that can change it by @xuanyu-z in https://github.com/lance-format/lance/pull/8101
fix(index): filter stale vector segment rows before top-k by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8351
fix: cast nested columns during schema evolution by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8379
fix(encoding): read wrapped miniblock level counts by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8410
fix(index): keep an index this build cannot read out of the erase path by @wombatu-kun in https://github.com/lance-format/lance/pull/8427
fix(index): keep a commit alive when an index cannot be opened by @wombatu-kun in https://github.com/lance-format/lance/pull/8441
fix(python): declare LanceSchema.field and field_case_insensitive in the type stub by @jonasdedden in https://github.com/lance-format/lance/pull/8486
fix(python): correct the misspelled materialize_deletions_threshold option by @jonasdedden in https://github.com/lance-format/lance/pull/8487
fix(python): declare CompactionOptions with total=False by @jonasdedden in https://github.com/lance-format/lance/pull/8488
fix(python): accept None for max_rows_per_group by @jonasdedden in https://github.com/lance-format/lance/pull/8489
fix(python): let create_index_uncommitted accept an IndexConfig by @jonasdedden in https://github.com/lance-format/lance/pull/8490
fix(python): declare the index training helpers as returning FixedSizeListArray by @jonasdedden in https://github.com/lance-format/lance/pull/8491
fix(python): annotate LanceFragment.data_files and deletion_file by @jonasdedden in https://github.com/lance-format/lance/pull/8492
fix(python): annotate count_rows, versions and optimize_indices by @jonasdedden in https://github.com/lance-format/lance/pull/8493
fix(python): annotate BatchUDF and the batch_udf decorator by @jonasdedden in https://github.com/lance-format/lance/pull/8494
fix: reject lossy null structs in v2.0 by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8507
fix: support Time32 integer casts in filters by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8508
fix(compaction): reject unsafe binary column layouts by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8510
fix: keep LabelList index current after reordered merge insert by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8511
fix(index): remap ZoneMap search results by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8512
fix(compaction): avoid stranded remainder fragments by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8513
fix(index): skip unrecognized index types by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8529
fix(linalg): pick the sum-of-squares accumulator per element type by @LuciferYang in https://github.com/lance-format/lance/pull/8533
fix: defer blank rows when a fully deleted batch has no row to copy by @LuciferYang in https://github.com/lance-format/lance/pull/8612
fix(sql): include system columns when requested for SQL-based query by @dentiny in https://github.com/lance-format/lance/pull/8626
fix(linalg): enforce the hamming_batch_u64 length contract in release by @LuciferYang in https://github.com/lance-format/lance/pull/8639
fix(linalg): report AVX-512 test coverage by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8664
fix: refuse to drop a path that is not a Lance dataset by @xiaguanglei in https://github.com/lance-format/lance/pull/8665
fix: preserve typed DataFusion errors through Shared and ReplayExec by @app/copilot-swe-agent in https://github.com/lance-format/lance/pull/8677
fix(linalg): correct multivector distance aggregation by @ddupg in https://github.com/lance-format/lance/pull/8710
fix(io): prevent io_uring requests from hanging by @Xuanwo in https://github.com/lance-format/lance/pull/8725
fix(io): reject unordered scheduler ranges by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8728
fix(linalg): enforce cosine u8 length contract by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8737
fix(fts): preserve global scoring for no-impact indexes by @BubbleCal in https://github.com/lance-format/lance/pull/8748
fix(fts): canonicalize fuzzy expansion across segments by @BubbleCal in https://github.com/lance-format/lance/pull/8758
fix(python): spell misnamed without a hyphen so the typos gate passes by @jackylee-ch in https://github.com/lance-format/lance/pull/8766
fix(index): stream bulk index file copies by @jackye1995 in https://github.com/lance-format/lance/pull/8770
fix(merge_insert): make analyze_plan follow execute's source routing by @LuciferYang in https://github.com/lance-format/lance/pull/8772
fix(datagen): align random primitive buffers by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8776
fix(fts): use substring-safe ngram defaults by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8779
fix(python): don't seed IVF centroids with NaN vectors by @jonasdedden in https://github.com/lance-format/lance/pull/8782
fix(ci): stabilize test_scan_slice against page-cache state by @RupertMaiti2005 in https://github.com/lance-format/lance/pull/8815
fix(encoding): normalize out-of-range null dictionary keys by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8827
fix(substrait): decode deprecated timestamp literals as microseconds by @jonasdedden in https://github.com/lance-format/lance/pull/8832
fix(hnsw): make a persisted HNSW cover its rows and reject invalid ones by @xuanyu-z in https://github.com/lance-format/lance/pull/8834
fix(mem_wal): seal the memtable on max_memtable_rows by @hamersaw in https://github.com/lance-format/lance/pull/8837
fix(fs): fix dataset files permission on local filesystem by @dentiny in https://github.com/lance-format/lance/pull/8839
fix(encoding): handle empty all-null dictionaries by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8841
fix(index): widen the RaBitQ FastScan accumulator above 1024 dims by @wombatu-kun in https://github.com/lance-format/lance/pull/8842
fix(index): declare FM index row address results by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8855
fix(linalg): widen u8 distance accumulators by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8888
fix: resolve clone sources with source commit handler by @Xuanwo in https://github.com/lance-format/lance/pull/8902
fix(index): key metadata cache on manifest etag by @ChilePiquin in https://github.com/lance-format/lance/pull/8904
fix(linalg): distinguish arrow batch type errors by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8911
fix(fts): align v1 merge reads with writer batches by @BubbleCal in https://github.com/lance-format/lance/pull/8922
fix: preserve complete blob v2 logical schemas by @Xuanwo in https://github.com/lance-format/lance/pull/8929
fix(io): carry batch_size_bytes through distributed FilteredReadOptions by @lichuang in https://github.com/lance-format/lance/pull/8933
fix(encoding): accept 1-bit booleans in the single-row full-zip fallback by @zhangyue19921010 in https://github.com/lance-format/lance/pull/8934
fix: avoid panic when rebasing a commit whose read version was cleaned up by @qiuyuhang in https://github.com/lance-format/lance/pull/8935
fix(io): reject non-lowercase GooseFS storage_options keys by @XuQianJin-Stars in https://github.com/lance-format/lance/pull/8940
fix(io): parse GooseFS chunk/block size suffixes like 4MB by @XuQianJin-Stars in https://github.com/lance-format/lance/pull/8943
fix: remove namespace-managed clone handler plumbing by @Xuanwo in https://github.com/lance-format/lance/pull/8964
fix(sql): classify malformed SQL queries as invalid input by @wjones127 in https://github.com/lance-format/lance/pull/8974
fix: let analyze_plan run under a caller-provided TaskContext by @LuQQiu in https://github.com/lance-format/lance/pull/8980
fix(index): prevent maintenance from undoing index drops by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8984
fix(java): remove duplicate IntoJava impl for &BasePath by @LuciferYang in https://github.com/lance-format/lance/pull/8990
fix: count only visible nulls in the 2.1+ writer by @jackye1995 in https://github.com/lance-format/lance/pull/9020
fix(mem_wal): run grace eviction on its own task, not the flush handler's ticker by @xuanyu-z in https://github.com/lance-format/lance/pull/9022
fix(cache): bypass Moka single-flight for zero-capacity caches by @jiaqizho in https://github.com/lance-format/lance/pull/9038
fix: copy sliced arrays from logical offsets by @jackye1995 in https://github.com/lance-format/lance/pull/9048
fix(index): keep every HNSW node reachable after a parallel build by @BubbleCal in https://github.com/lance-format/lance/pull/9053
fix(fts): preserve prewarmed state across request store wrappers by @BubbleCal in https://github.com/lance-format/lance/pull/9075
fix: stamp overlay row lineage at commit by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/9084
fix: honor zero scanner limits by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/9111
fix(encoding): prevent bits_per_value=0 in FullZipLayout for FSL with AllNull child by @westonpace in https://github.com/lance-format/lance/pull/9130
fix: load external fragment reuse index details from the correct base path by @LuQQiu in https://github.com/lance-format/lance/pull/9141
fix: skip size probes for bounded blob reads by @Xuanwo in https://github.com/lance-format/lance/pull/9146
fix(python): preserve filter pushdown with row IDs by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/9154
fix(dataset): handle lance dataset blobs on deep clone by @dentiny in https://github.com/lance-format/lance/pull/9185
fix(scanner): respect negated flag when converting InList filters to take operations by @dentiny in https://github.com/lance-format/lance/pull/9188

Documentation 📚

docs: classify the fragment's non-Lance referenced files by format by @LuciferYang in https://github.com/lance-format/lance/pull/8562
docs: correct stable row ID migration and storage by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8852
docs(linalg): document SIMD conversion panics by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8862
docs(core): correct AVX tier feature semantics by @app/lance-gatefixer in https://github.com/lance-format/lance/pull/8910
docs: add Apache Doris integration by @Gabriel39 in https://github.com/lance-format/lance/pull/8983

Performance Improvements 🚀

perf(rowids): count bitmap bits a word at a time by @pengw0048 in https://github.com/lance-format/lance/pull/8642
perf: stop listing the entire _versions directory for limited version queries by @LuQQiu in https://github.com/lance-format/lance/pull/8679
perf: run-optimize roaring bitmaps before persisting by @zhangyue19921010 in https://github.com/lance-format/lance/pull/8688
perf(rowids): reuse cursors across sequential batches by @jiaoew1991 in https://github.com/lance-format/lance/pull/8713
perf(python): stream reader batches from one producer by @jiaoew1991 in https://github.com/lance-format/lance/pull/8714
perf(rowids): accelerate dense bitmap decoding by @jiaoew1991 in https://github.com/lance-format/lance/pull/8715
perf(rowids): stream dataset version runs with a cursor by @jiaoew1991 in https://github.com/lance-format/lance/pull/8716
perf(merge_insert): probe the most selective indexed key first and stop early by @LuciferYang in https://github.com/lance-format/lance/pull/8719
perf(commit): drop O(C^2) field lookups from column index validation by @zhangyue19921010 in https://github.com/lance-format/lance/pull/8720
perf(scan): reduce system column pipeline overhead by @jiaoew1991 in https://github.com/lance-format/lance/pull/8747
perf(fts): defer phrase confirmation with score bounds by @BubbleCal in https://github.com/lance-format/lance/pull/8749
perf(fts): share MultiMatch prefilter materialization by @BubbleCal in https://github.com/lance-format/lance/pull/8750
perf(fts): complete ambiguous WAND ties without full replay by @BubbleCal in https://github.com/lance-format/lance/pull/8751
perf(build): revert default target back to haswell (avx2) by @westonpace in https://github.com/lance-format/lance/pull/8754
perf(commit): skip overlap detection for single-segment indices by @zhangyue19921010 in https://github.com/lance-format/lance/pull/8778
perf(fts): keep compound scorer in fast search by @BubbleCal in https://github.com/lance-format/lance/pull/8817
perf(fts): index residual compound rows once by @BubbleCal in https://github.com/lance-format/lance/pull/8818
perf(fts): remove benchmark metrics from query hot paths by @BubbleCal in https://github.com/lance-format/lance/pull/8825
perf(rowids): probe the fragments instead of merging every row id by @dshepelev15 in https://github.com/lance-format/lance/pull/8883
perf(index): open fragment reuse indexes 10-2200x faster by @Xuanwo in https://github.com/lance-format/lance/pull/8887
perf(index): prevent two-file shuffle starvation by @BubbleCal in https://github.com/lance-format/lance/pull/8894
perf(io): read large metadata msgs as concurrent chunked range requests by @dshepelev15 in https://github.com/lance-format/lance/pull/8914
perf(index): accelerate RQ scale search by @BubbleCal in https://github.com/lance-format/lance/pull/8924
perf(rowids): keep the row id index cached and rank bitmaps for lookups by @dshepelev15 in https://github.com/lance-format/lance/pull/8930
perf(cleanup): avoid reading manifests for version retention by @ziwenzhang in https://github.com/lance-format/lance/pull/9019
perf(fts): accelerate wide and queries with bulk intersection by @BubbleCal in https://github.com/lance-format/lance/pull/9030
perf(fts): defer decoding for underfilled conjunctions by @BubbleCal in https://github.com/lance-format/lance/pull/9031
perf(fts): reuse resident statistics and prepared scorers by @BubbleCal in https://github.com/lance-format/lance/pull/9032
perf(fts): bound classic conjunction scoring in dense windows by @BubbleCal in https://github.com/lance-format/lance/pull/9033
perf(index): read IVF prewarm in parallel byte windows by @BubbleCal in https://github.com/lance-format/lance/pull/9049
perf(fts): skip phrase position decode when the BM25 score cannot ent… by @mikewhb in https://github.com/lance-format/lance/pull/9153
perf: check table deregistration status concurrently in list_directory_tables by @ChilePiquin in https://github.com/lance-format/lance/pull/9164
perf: push table listing pagination down to the object store by @ChilePiquin in https://github.com/lance-format/lance/pull/9165
perf: disable manifest indices by default by @jackye1995 in https://github.com/lance-format/lance/pull/9180

Other Changes

refactor: merge JsonConvertingReader into SchemaAdapter by @xloya in https://github.com/lance-format/lance/pull/7678
refactor(encoding): align block codecs with miniblock by @Xuanwo in https://github.com/lance-format/lance/pull/8324
refactor: replace hand-rolled string→bool parsing with str_is_truthy/str_to_bool by @app/copilot-swe-agent in https://github.com/lance-format/lance/pull/8675
refactor: express feature flags as bit shifts by @Xuanwo in https://github.com/lance-format/lance/pull/8893
revert: add column slice stitching by @Xuanwo in https://github.com/lance-format/lance/pull/8926

Full Changelog: https://github.com/lance-format/lance/compare/release-root/12.0.0-beta.N...v12.0.0

Source: README.md, updated 2026-09-17