2025 Changelog

ClickHouse release v24.8.12.28-lts (832432bd021) FIXME as compared to v24.8.11.5-lts (a9b661dd2ac)

New Feature

• Backported in #74316: When min_age_to_force_merge_seconds and min_age_to_force_merge_on_partition_only are both enabled, the part merging will ignore the max bytes limit. #73656 (Kai Zhu).

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

• Backported in #74222: Avoid pause after ALTER TABLE REPLACE/MOVE PARTITION FROM/TO TABLE. Retrieve correct settings for background task scheduling. #72024 (Aleksei Filatov).
• Backported in #73889: Fix preparing for squashin for Dynamic and JSON columns. Previously in some cases new types could be inserted into shared variant/shared data even when the limit on types/paths is not reached. #73388 (Pavel Kruglov).
• Backported in #74435: Fixes segfault when the source of the dictionary contains a function with wrong data. #73535 (Yarik Briukhovetskyi).
• Backported in #74139: Fix possible data inconsistency in Dynamic column. Fixes possible logical error Nested columns sizes are inconsistent with local_discriminators column size. #73644 (Pavel Kruglov).
• Backported in #74527: Fixed NOT_FOUND_COLUMN_IN_BLOCK in queries with FINAL and SAMPLE. Fixed incorrect result in selects with FINAL from CollapsingMergeTree and enabled optimizations of FINAL . #73682 (Anton Popov).
• Backported in #74138: Fix deserialization of Dynamic/Object structure. It could lead to CANNOT_READ_ALL_DATA exceptions. #73767 (Pavel Kruglov).
• Backported in #74111: Fixes #72078 ( S3 Express Support was broken ). #73777 (Sameer Tamsekar).
• Backported in #74104: A disk using the plain_rewritable metadata can be shared among multiple server instances. It is expected for one instance to read a metadata object while another modifies it. Object not found errors are ignored during plain_rewritable initialization with Azure storage, similar to the behavior implemented for S3. #74059 (Julia Kartseva).
• Backported in #74152: Fixes case when the user specifies keyword arguments in the kafka table engine. #74064 (Yarik Briukhovetskyi).
• Backported in #74173: Fix crash when reading a subcolumn from the compressed Memory engine table. Fixes #74009. #74161 (Nikita Taranov).

NOT FOR CHANGELOG / INSIGNIFICANT

• Backported in #74459: Make version_helper populated from every commit. #74399 (Mikhail f. Shiryaev).