25.3.8.10041 Altinity Stable

Altinity Stable release v25.3.8.10041 (cfe75cb) as compared to upstream/v25.3.8.23-lts (4149650741851dc48fd43371b686804db152aca3)

New Feature

• Added new SQL statement EXECUTE AS to support user impersonation (ClickHouse#70775 by @shiyer7474 via #1125)
• Allow altering a database comment (ClickHouse#75622 by @NamHoaiNguyen via #1118)

Improvement

• Fixes handling of users with a dot in the name when added via config file (ClickHouse#86633 by @mkmkme via #1121)

Performance Improvement

• SELECT query with FINAL clause on a ReplacingMergeTree table with the is_deleted column now executes faster because of improved parallelization from 2 existing optimizations : 1) do_not_merge_across_partitions_select_final optimization for partitions of the table that have only a single part 2) Split other selected ranges of the table into intersecting / non-intersecting and only intersecting ranges have to pass through FINAL merging transform (ClickHouse#88090 by @shankar-iyer via #1126)

Critical Bug Fix (crash, data loss, RBAC) or LOGICAL_ERROR

• A Poco::TimeoutException exception thrown from Poco::Net::HTTPChunkedStreamBuf::readFromDevice leads to a crash with SIGABRT. (ClickHouse#88668 and ClickHouse#89090 by @mstetsyuk, ClickHouse#81597 by @CheSema via #1117)

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

• Fix table name encoding in data lake rest catalog (Backport of ClickHouse#87020 by @ianton-ru via #1127)
• Fixed incorrect query results and out-of-memory crashes when using match(column, '^…') with backslash-escaped characters (ClickHouse#79969 by @filimonov via #1122)
• Fixed move-to-prewhere optimization, which did not work in the presence of row policy (ClickHouse#87303 by @KochetovNicolai, ClickHouse#88017 by @novikd via #1129)

Build/Testing/Packaging Improvements

• Bump OpenSSL to fix CVE-2025-9230

Not for changelog

• Ignore parse error in system.distributed_ddl_queue (ClickHouse#79369 by @ilejn via #1128)

Packages

Available for both AMD64 and Aarch64 from https://builds.altinity.cloud/#altinitystable as either .deb, .rpm, or .tgz

Docker images

Available for both AMD64 and Aarch64: altinity/clickhouse-server:25.3.8.10041.altinitystable

Full Changelog: v25.3.8.23-lts...v25.3.8.10041.altinitystable