2025 Changelog

ClickHouse release v25.7.7.68-stable (7e68b82051a) FIXME as compared to v25.7.6.21-stable (a81134c5c92)

Improvement

• Backported in #86732: Fixed error in case of executing SYSTEM DROP REPLICA against a Catalog with corrupted metadata. #86391 (Nikita Mikhaylov).
• Backported in #86825: Improve performance of RemoveRecursive request in Keeper. #86789 (Antonio Andelic).

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

• Backported in #86058: Fixed server crash when a user created with no_password attempts to login after the server setting allow_no_password was changed to 0. #84426 (Shankar Iyer).
• Backported in #86612: Shutdown tables properly when recovering database replica. Improper shutdown would lead to LOGICAL_ERROR for some table engines during database replica recovery. #84744 (Antonio Andelic).
• Backported in #86520: Fix segfault in delta-kernel implementation. #85160 (Kseniia Sumarokova).
• Backported in #85255: Fix reading partitioned data with disabled delta-kernel in DeltaLake engine. It was broken in 25.7 (https://github.com/ClickHouse/ClickHouse/pull/81136). #85223 (Kseniia Sumarokova).
• Backported in #85652: Parameters like date_time_input_format have been just ignored when http with multipart. #85570 (Sema Checherinda).
• Backported in #87157: Add a check to allow correlated subqueries in the FROM clause only if they use columns from the outer query. Fixes #85469. Fixes #85402. #85966 (Dmitry Novik).
• Backported in #86955: Fix alter update of a column with a subcolumn used in other column materialized expression. Previously materialized column with subcolumn in its expression was not updated properly. #85985 (Pavel Kruglov).
• Backported in #86693: Forbid altering columns whose subcolumns are used in PK or partition expression. #86005 (Pavel Kruglov).
• Backported in #86199: Fix using wrong default values for path with Enum hint inside JSON. #86065 (Pavel Kruglov).
• Backported in #86518: Fix logical error during filesystem cache dynamic resize. Closes #86122. Closes https://github.com/ClickHouse/clickhouse-core-incidents/issues/473. #86130 (Kseniia Sumarokova).
• Backported in #86947: Fix cast from LowCardinality(Nullable(T)) to Dynamic. #86365 (Pavel Kruglov).
• Backported in #86878: Fix GROUP BY Nullable(JSON). #86410 (Pavel Kruglov).
• Backported in #86580: Ignore exceptions during flushing log on shutdown and make shutdown more safe (to avoid SIGSEGV). #86546 (Azat Khuzhin).
• Backported in #86891: Fix missing chunk header when send_chunk_header is enabled and UDF is invoked via HTTP protocol. #86606 (Vladimir Cherkasov).
• Backported in #86872: Fix S3Queue logical error "Expected current processor {} to be equal to {}", which happened because of keeper session expiration. #86615 (Kseniia Sumarokova).
• Backported in #87057: Fix writing NULL into JSON shared data in RowBinary input format and add some additional validations in ColumnObject. #86812 (Pavel Kruglov).
• Backported in #86977: Fix TimeSeries engine table breaking creation of new replica in Replicated Database. #86845 (Nikolay Degterinsky).
• Backported in #86861: Fix querying system.distributed_ddl_queue in cases where tasks are missing certain Keeper nodes. #86848 (Antonio Andelic).
• Backported in #87054: Fix seeking at the end of the decompressed block. #86906 (Pavel Kruglov).
• Backported in #87191: Fixed possible incorrect result of uniqExact function with ROLLUP and CUBE modifiers. #87014 (Nikita Taranov).
• Backported in #87070: Correctly cast output of PREWHERE after splitting it into multiple steps. #87040 (Antonio Andelic).
• Backported in #87416: EmbeddedRocksDB: Path must be inside user_files. #87109 (Raúl Marín).
• Backported in #87311: Fix KeeperMap tables created before 25.1, leaving data in ZooKeeper after the DROP query. #87112 (Nikolay Degterinsky).
• Backported in #87393: Fixed incorrect accounting of temporary data deallocations in max_temporary_data_on_disk_size limit tracking, close #87118. #87140 (JIaQi).
• Backported in #87435: Fix "Too large size passed to allocator" LOGICAL_ERROR in JOIN due to mixed const and non-const blocks. #87231 (Azat Khuzhin).

Build/Testing/Packaging Improvement

• Backported in #86806: Use openldap 2.6.10. #86623 (Konstantin Bogdanov).

NO CL CATEGORY

• Backported in #86568:. #86558 (Nikita Mikhaylov).

NOT FOR CHANGELOG / INSIGNIFICANT

• Backported in #86680: Check feature flag when adding RemoveRecursive request to Multi. #86554 (Antonio Andelic).