ClickHouse/docs/changelogs/v21.11.5.33-stable.md

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1	2022

2022 Changelog

ClickHouse release v21.11.5.33-stable FIXME as compared to v21.11.4.14-stable

Performance Improvement

• Backported in #31735: Improve performance of JSON and XML output formats. #31673 (Alexey Milovidov).

Bug Fix

• Backported in #31572: Quota limit was not reached, but the limit was exceeded. This PR fixes #31174. #31337 (sunny).

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

• Backported in #31517: Remove not like function into RPNElement. #31169 (sundyli).
• Backported in #31551: Resolve nullptr in STS credentials provider for S3. #31409 (Vladimir Chebotarev).
• Backported in #31580: * Disable partial_merge_join_left_table_buffer_bytes before bug in this optimization is fixed. See #31009). * Remove redundant option partial_merge_join_optimizations. #31528 (Vladimir C).
• Backported in #31600: Fix invalid generated JSON when only column names contain invalid UTF-8 sequences. #31534 (Kevin Michel).
• Backported in #31593: All non-x86 builds were broken, because we don't have tests for them. This closes #31417. This closes #31524. #31574 (Alexey Milovidov).
• Backported in #31795: Fix sparkbars are not aligned, see: #26175#issuecomment-960353867, comment. #31624 (小路).
• Backported in #31747: RENAME TABLE query worked incorrectly on attempt to rename an DDL dictionary in Ordinary database, it's fixed. #31638 (Alexander Tokmakov).
• Backported in #31791: Settings input_format_allow_errors_num and input_format_allow_errors_ratio did not work for parsing of domain types, such as IPv4, it's fixed. Fixes #31686. #31697 (Alexander Tokmakov).
• Backported in #31895: * Fixed function ngrams when string contains utf8 characters. #31706 (yandd).
• Backported in #31831: Fixed there are no such cluster here error on execution of ON CLUSTER query if specified cluster name is name of Replicated database. #31723 (Alexander Tokmakov).
• Backported in #31814: Fix race in JSONEachRowWithProgress output format when data and lines with progress are mixed in output. #31736 (Kruglov Pavel).
• Backported in #32015: Fixed rare segfault on concurrent ATTACH PARTITION queries. #31738 (Alexander Tokmakov).
• Backported in #32017: Fix group by / order by / limit by aliases with positional arguments enabled. Closes #31173. #31741 (Kseniia Sumarokova).
• Backported in #31760: Fix usage of Buffer table engine with type Map. Fixes #30546. #31742 (Anton Popov).
• Backported in #31891: Fix possible assertion ../src/IO/ReadBuffer.h:58: bool DB::ReadBuffer::next(): Assertion '!hasPendingData()' failed. in TSKV format. #31804 (Kruglov Pavel).
• Backported in #32029: Fix invalid cast of nullable type when nullable primary key is used. This fixes #31075. #31823 (Amos Bird).
• Backported in #31920: Fix reading from MergeTree tables with enabled use_uncompressed_cache. #31826 (Anton Popov).
• Backported in #32076: Fix a bug about function transform with decimal args. #31839 (Shuai li).
• Backported in #31938: - Change configuration path from keeper_server.session_timeout_ms to keeper_server.coordination_settings.session_timeout_ms when constructing a KeeperTCPHandler - Same with operation_timeout. #31859 (JackyWoo).
• Backported in #31908: Fix functions empty and notEmpty with arguments of UUID type. Fixes #31819. #31883 (Anton Popov).
• Backported in #32091: Some GET_PART entry might hang in replication queue if part is lost on all replicas and there are no other parts in the same partition. It's fixed in cases when partition key contains only columns of integer types or Date[Time]. Fixes #31485. #31887 (Alexander Tokmakov).
• Backported in #32020: Fix FileLog engine unnesessary create meta data directory when create table failed. Fix #31962. #31967 (flynn).

NOT FOR CHANGELOG / INSIGNIFICANT

• Support toUInt8/toInt8 for if constant condition optimization. #31866 (Nikolai Kochetov).