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2026 Changelog

docs/changelogs/v26.1.2.11-stable.md

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2026 Changelog

ClickHouse release v26.1.2.11-stable (53779390caa) FIXME as compared to v26.1.1.912-stable (4c47e680f55)

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

  • Backported in #95646: Fix incorrect primary key and skip index pruning for predicates involving toWeek, toYearWeek, toStartOfWeek, toLastDayOfWeek, and toDayOfWeek, and fix exceptions in some of these functions for valid queries with LowCardinality(String). #94816 (Nihal Z. Miaji).
  • Backported in #95634: Fixes a crash during ReplicatedMergeTree startup caused by concurrent removal of delete_tmp_* directories. #94892 (myeongjun).
  • Backported in #95429: Make column transform only once during getting content of manifesrt .avro list and files. #95164 (Daniil Ivanik).
  • Backported in #95620: Fix the prewhere filter error caused by lambda expressions in prewhere. #95395 (Xiaozhe Yu).
  • Backported in #95610: Avoid possible crash for distributed queries in case of cancellation. #95466 (Aleksandr Musorin).
  • Backported in #95699: Fixed There was an error: Cannot obtain error message logical error when waiting for a distributed DDL and dropping the Replicated database concurrently. Fixes #95539. #95664 (Alexander Tokmakov).

Build/Testing/Packaging Improvement

NOT FOR CHANGELOG / INSIGNIFICANT