ClickHouse/docs/changelogs/v21.3.16.5-lts.md

sidebar_position	sidebar_label
1	2022

2022 Changelog

ClickHouse release v21.3.16.5-lts FIXME as compared to v21.3.15.4-stable

Bug Fix

• Backported in #26940: Do not remove data on ReplicatedMergeTree table shutdown to avoid creating data to metadata inconsistency. #26716 (nvartolomei).
• Backported in #26983: Aggregate function parameters might be lost when applying some combinators causing exceptions like Conversion from AggregateFunction(topKArray, Array(String)) to AggregateFunction(topKArray(10), Array(String)) is not supported. It's fixed. Fixes #26196 and #26433. #26814 (Alexander Tokmakov).
• Backported in #26998: Fix reading of custom TLDs (stops processing with lower buffer or bigger file). #26948 (Azat Khuzhin).
• Backported in #27088: Now partition ID in queries like ALTER TABLE ... PARTITION ID xxx validates for correctness. Fixes #25718. #26963 (alesapin).
• Backported in #27049: [RFC] Fix possible mutation stack due to race with DROP_RANGE. #27002 (Azat Khuzhin).
• Backported in #27158: Fix synchronization in GRPCServer This PR fixes #27024. #27064 (Vitaly Baranov).
• Backported in #27368: - Fix uninitialized memory in functions multiSearch* with empty array, close #27169. #27181 (Vladimir C).
• Backported in #27264: In rare cases system.detached_parts table might contain incorrect information for some parts, it's fixed. Fixes #27114. #27183 (Alexander Tokmakov).
• Backported in #27413: Fixed incorrect validation of partition id for MergeTree tables that created with old syntax. #27328 (Alexander Tokmakov).
• Backported in #27645: Fix incorrect result for query with row-level security, prewhere and LowCardinality filter. Fixes #27179. #27329 (Nikolai Kochetov).
• Backported in #27473: fix metric BackgroundMessageBrokerSchedulePoolTask, maybe mistyped。. #27452 (Ben).
• Backported in #27864: Prevent crashes for some formats when NULL (tombstone) message was coming from Kafka. Closes #19255. #27794 (filimonov).
• Backported in #28207: Fix cases, when read buffer fails with 'attempt to read after end of file'. Closes #26149. #28150 (Filatenkov Artur).

Build/Testing/Packaging Improvement

• Backported in #28075: Temporarily switched ubuntu apt repository to mirror ru.archive.ubuntu.com as default one(archive.ubuntu.com) is not responding from our CI. #28016 (Ilya Yatsishin).

Bug Fix (user-visible misbehaviour in official stable release)

• Backported in #28181: Fixed possible excessive number of conditions moved from WHERE to PREWHERE (optimization controlled by settings optimize_move_to_prewhere). #28139 (lthaooo).
• Backported in #28293: Fix inconsistent result in queries with ORDER BY and Merge tables with enabled setting optimize_read_in_order. #28266 (Anton Popov).

NOT FOR CHANGELOG / INSIGNIFICANT

• Fix prometheus metric name #26140 (Vladimir C).
• Fix mysql_kill_sync_thread_restore_test #26673 (Vladimir C).
• Try fix rabbitmq tests #26826 (Kseniia Sumarokova).
• Update PVS checksum #27317 (Alexander Tokmakov).
• Fix race between REPLACE PARTITION and MOVE PARTITION #28035 (Alexander Tokmakov).
• Follow-up to #28016 #28036 (Alexander Tokmakov).
• Set version of tzlocal to 2.1 #28063 (Vitaly Baranov).
• Another try to fix BackgroundPoolTask decrement. #28353 (Nikolai Kochetov).
• More accurate check that zk root exists. #28412 (Nikolai Kochetov).