2025 Changelog

ClickHouse release v25.3.11.20-lts (08a3e570d15) FIXME as compared to v25.3.10.19-lts (4209e0734dc)

Improvement

• Backported in #92563: Make query memory usage detection for spilling to disk during aggregation/sorting more robust. #92500 (Azat Khuzhin).

Bug Fix (user-visible misbehavior in an official stable release)

• Backported in #92181: Fix removing unused projection columns in the presence of UNION. Fixes #88180. #88350 (Sema Checherinda).
• Backported in #91390: Fix wildcard grants check for partial revoke. Added more tests. #90922 (pufit).
• Backported in #91686: Fix reading dynamic subcolumns from materialized columns in mutations. Closes #90653. #91040 (Pavel Kruglov).
• Backported in #91571: Currently, the setting is set to false, so when async insert queue is flushed to a remote server, the inserts are always synchronous. Even in case of the setting is True for a user. #91386 (Mikhail f. Shiryaev).
• Backported in #92131: Fix crash in dictGetDescendants caused by NULL when dictionary type has Hierarchy support but no column is HIERARCHICAL. Closes #92026. Closes #92121. #91420 (Nihal Z. Miaji).
• Backported in #91913: Fix LOGICAL_ERROR in RecursiveCTEChunkGenerator. #91827 (Pablo Marcos).
• Backported in #92252: Add repair mechanism for JSON with duplicated path in shared data and dynamic paths that could happen because of the bug that was fixed in https://github.com/ClickHouse/ClickHouse/pull/90816. #91886 (Pavel Kruglov).
• Backported in #92686: Cache schema only for the file it was inferred from in globs instead of all files during schema inference. Closes #91745. #92006 (Pavel Kruglov).
• Backported in #92272: Fix UDF replace in format. #92210 (Raúl Marín).
• Backported in #92700: Fix count_distinct_optimization pass over window functions and over multiple arguments. #92376 (Raúl Marín).
• Backported in #92454: Fix possible crash in aggregate functions after MEMORY_LIMIT_EXCEEDED. #92390 (Azat Khuzhin).
• Backported in #92737: Fix bug in data skipping logic when not match(...) is used in WHERE causing incorrect results. Closes #92492. #92726 (Nihal Z. Miaji).
• Backported in #92765: Do not attempt to delete temporary directories at startup if a MergeTree table is created over a read-only disk. #92748 (Alexey Milovidov).

Build/Testing/Packaging Improvement

• Backported in #92013: Fix flaky 00906_low_cardinality_cache. #92009 (Nikita Fomichev).

NO CL ENTRY

• NO CL ENTRY: 'Revert "Backport #91001 to 25.3: Don't allow adaptive_write_buffer_initial_size set to 0"'. #91978 (Azat Khuzhin).

NOT FOR CHANGELOG / INSIGNIFICANT

• Backported in #92515: CI: Fix clickhouse version tweak calculation for the fork with sync. #89098 (Max Kainov).
• Backported in #91948: Backport of the fix for optimize_skip_unused_shards optimization for Distributed engine that may lead to Serialization is not implemented for data type Set due to wrong types. #91923 (Azat Khuzhin).
• Backported in #92442: Fix polaris catalog: encode nested namespace. #92079 (Konstantin Vedernikov).