4.0.5

4.0.5

Release Date: February 3, 2026

Improvements

• Bumped Paimon version to 1.3.1. #67098
• Restored missing optimizations in DP statistics estimation to reduce redundant calculations. #67852
• Improved pruning in DP Join reorder to skip expensive candidate plans earlier. #67828
• Optimized JoinReorderDP partition enumeration to reduce object allocation and added an atom count cap (≤ 62). #67643
• Optimized DP join reorder pruning and added checks to BitSet to reduce stream operation overhead. #67644
• Skipped predicate column statistics collection during DP statistics estimation to reduce CPU overhead. #67663
• Optimized correlated Join row count estimation to avoid repeatedly building Statistics objects. #67773
• Reduced memory allocations in Statistics.getUsedColumns. #67786
• Avoided redundant Statistics map copies when only row counts are updated. #67777
• Skipped aggregate pushdown logic when no aggregation exists in the query to reduce overhead. #67603
• Improved COUNT DISTINCT over windows, added support for fused multi-distinct aggregations, and optimized CTE generation. #67453
• Supports map_agg function in the Trino dialect. #66673
• Supports batching retrieval of LakeTablet location information during physical planning to reduce RPC calls in shared-data clusters. #67325
• Added a thread pool for Publish Version transactions to shared-nothing clusters to improve concurrency. #67797
• Optimized LocalMetastore locking granularity by replacing database-level locks with table-level locks. #67658
• Refactored MergeCommitTask lifecycle management and added support for task cancellation. #67425
• Supports intervals for automated cluster snapshots. #67525
• Automatically cleaned up unused mem_pool entries in MemTrackerManager. #67347
• Ignored information_schema queries during warehouse idle checks. #67958
• Supports dynamically enabling global shuffle for Iceberg table sinks based on data distribution. #67442
• Added Profile metrics for connector sink modules. #67761
• Improved the collection and display of load spill metrics in Profiles, distinguishing between local and remote I/O. #67527
• Changed Async-Profiler log level to Error to avoid repeating warning logs. #67297
• Notified Starlet during BE shutdown to report SHUTDOWN status to StarMgr. #67461

Bug Fixes

The following issues have been fixed:

• Lacking support for legal simple paths containing hyphens (-). #67988
• Runtime error when aggregate pushdown occurred on grouping keys involving JSON types. #68142
• Issue where JSON path rewrite rules incorrectly pruned partition columns referenced in partition predicates. #67986
• Type mismatch issue when rewriting simple aggregation using statistics. #67829
• Potential heap-buffer-overflow in partition Joins. #67435
• Duplicate slot_ids introduced when pushing down heavy expressions. #67477
• Division-by-zero error in ExecutionDAG fragment connection for lacking precondition checks. #67918
• Potential issues caused by fragment parallel prepare for single BE. #67798
• Operator terminates incorrectly for lacking set_finished method for RawValuesSourceOperator. #67609
• BE crash caused by unsupported DECIMAL256 type (precision > 38) in column aggregators. #68134
• Shared-data clusters lack support for Fast Schema Evolution v2 over DELETE operations by carrying schema_key in requests. #67456
• Shared-data clusters lack support for Fast Schema Evolution v2 over synchronous materialized views and traditional schema changes. #67443
• Vacuum might accidentally delete files when file bundling is disabled during FE downgrade. #67849
• Incorrect graceful exit handling in MySQLReadListener. #67917