2025 Changelog

ClickHouse release v25.5.6.14-stable (ac7909e3af3) FIXME as compared to v25.5.5.19-stable (c7635f09ae1)

Improvement

• Backported in #82561: Add ability to reload max_local_read_bandwidth_for_server and max_local_write_bandwidth_for_server on fly without restart server. #82083 (Kai Zhu).

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

• Backported in #82995: When using a non-caching Database implementation, the metadata of the corresponding table is deleted after the columns are returned and the reference is invalidated. #82939 (buyval01).
• Backported in #83084: Fixed incorrect output of function formatDateTime when formatter %f is used together with variable-size formatters (e.g. %M). #83020 (Robert Schulze).

Build/Testing/Packaging Improvement

• Backported in #82895: Use libarchive 3.8.1. #82648 (Konstantin Bogdanov).

NOT FOR CHANGELOG / INSIGNIFICANT

• Backported in #82971: Keeper: some small digest and auth related fixes. #82111 (Antonio Andelic).
• Backported in #82959: Add error response for getSessionID. #82600 (JIaQi).