Skip to content

4.0.2

Latest
Latest

Choose a tag to compare

View all tags
@wangsimo0 wangsimo0 released this 06 Dec 06:31
· 1348 commits to main since this release
4.0.2
1f1aa9c
This commit was created on GitHub.com and signed with GitHub’s verified signature.
GPG key ID: B5690EEEBB952194
Verified
Learn about vigilant mode.

4.0.2

Release Date: December 4, 2025

New Features

  • Introduced a new resource group attribute, mem_pool, allowing multiple resource groups to share the same memory pool and enforce a joint memory limit for the pool. This feature is backward compatible. default_mem_pool is used if mem_pool is not specified. #64112

Improvements

  • Reduced remote storage access during Vacuum after File Bundling is enabled. #65793
  • The File Bundling feature caches the latest tablet metadata. #65640
  • Improved safety and stability for long-string scenarios. #65433 #65148
  • Optimized the SplitTopNAggregateRule logic to avoid performance regression. #65478
  • Applied the Iceberg/DeltaLake table statistics collection strategy to other external data sources to avoid collecting statistics when the table is a single table. #65430
  • Added Page Cache metrics to the Data Cache HTTP API api/datacache/app_stat. #65341
  • Supports ORC file splitting to enable parallel scanning of a single large ORC file. #65188
  • Added selectivity estimation for IF predicates in the optimizer. #64962
  • Supports constant evaluation of hour, minute, and second for DATE and DATETIME types in the FE. #64953
  • Enabled rewrite of simple aggregation to MetaScan by default. #64698
  • Improved multiple-replica assignment handling in shared-data clusters for enhanced reliability. #64245
  • Exposes cache hit ratio in audit logs and metrics. #63964
  • Estimates per-bucket distinct counts for histograms using HyperLogLog or sampling to provide more accurate NDV for predicates and joins. #58516
  • Supports FULL OUTER JOIN USING with SQL-standard semantics. #65122
  • Prints memory information when Optimizer times out for diagnostics. #65206

Bug Fixes

The following issues have been fixed:

  • DECIMAL56 mod-related issue. #65795
  • Issue related to Iceberg scan range handling. #65658
  • MetaScan rewrite issues on temporary partitions and random buckets. #65617
  • JsonPathRewriteRule uses the wrong table after transparent materialized view rewrite. #65597
  • Materialized view refresh failures when partition_retention_condition referenced generated columns. #65575
  • Iceberg min/max value typing issue. #65551
  • Issue with queries against information_schema.tables and views across different databases when enable_evaluate_schema_scan_rule is set to true. #65533
  • Integer overflow in JSON array comparison. #64981
  • MySQL Reader does not support SSL. #65291
  • ARM build issue caused by SVE build incompatibility. #65268
  • Queries based on bucket-aware execution may get stuck for bucketed Iceberg tables. #65261
  • Robust error propagation and memory safety issues for the lack of memory limit checks in OLAP table scan. #65131

Behavior Changes

  • When a materialized view is inactivated, the system recursively inactivates its dependent materialized views. #65317
  • Uses the original materialized view query SQL (including comments/formatting) when generating SHOW CREATE output. #64318
Assets 2
Loading