2025 Changelog

ClickHouse release v25.3.8.23-lts (41496507418) FIXME as compared to v25.3.7.194-lts (36637934778)

Improvement

• Backported in #88777: Fixes memory leak due to GLOBAL IN (https://github.com/ClickHouse/ClickHouse/issues/88615). #88617 (pranavmehta94).
• Backported in #88760: Add a step to postinstall script for clickhouse-keeper which enables starting on boot. #88746 (YenchangChan).

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

• Backported in #88220: Fixes a crash where some valid user-submitted data to an AggregateFunction(quantileDD) column could cause merges to recurse infinitely. #86560 (Raphaël Thériault).
• Backported in #88598: Fix resolving table schema with url() table function when parallel_replicas_for_cluster_functions setting is set to 1. #87029 (Konstantin Bogdanov).
• Backported in #88647: Big clusters with node numbers > 10 have a high probability of failing the restore with error [941] 67c45db4-4df4-4879-87c5-25b8d1e0d414 <Trace>: RestoreCoordinationOnCluster The version of node /clickhouse/backups/restore-7c551a77-bd76-404c-bad0-3213618ac58e/stage/num_hosts changed (attempt #9), will try again. The num_hosts node is overwritten by many hosts at the same time. The fix makes the setting to control attempts dynamic. Closes #87721. #88484 (Mikhail f. Shiryaev).
• Backported in #88712: Fix potential crash caused by concurrent mutation of underlying const PREWHERE columns. #88605 (Azat Khuzhin).
• Backported in #88902: After recovering, a Replicated database replica might get stuck for a long time printing messages like Failed to marked query-0004647339 as finished (finished=No node, synced=No node), it's fixed. #88671 (Alexander Tokmakov).
• Backported in #88886: Fixes access validation on select for loop table function. #88802 (pufit).
• Backported in #89033: Fix bug in the function reverseUTF8. In previous versions, it mistakenly reversed the bytes of UTF-8 code points of length 4. This closes #88913. #88914 (Alexey Milovidov).

NOT FOR CHANGELOG / INSIGNIFICANT

• Integration tests: fix bitnami image. #88542 (Nikita Fomichev).