ClickHouse/docs/changelogs/v20.6.4.44-stable.md

ClickHouse release v20.6.4.44-stable FIXME as compared to v20.6.3.28-stable

Improvement

• Backported in #13919: Fix data race in lgamma function. This race was caught only in tsan, no side effects a really happened. #13842 (Nikolai Kochetov).

Bug Fix

• Backported in #13560: Fix access to redis dictionary after connection was dropped once. It may happen with cache and direct dictionary layouts. #13082 (Anton Popov).
• Backported in #13507: Fix parsing row policies from users.xml when names of databases or tables contain dots. This fixes #5779, #12527. #13199 (Vitaly Baranov).
• Backported in #13357: AvroConfluent: Skip Kafka tombstone records AvroConfluent: Support skipping broken records ... #13203 (Andrew Onyshchuk).
• Backported in #13350: Return passed number for numbers with MSB set in roundUpToPowerOfTwoOrZero(). #13234 (Azat Khuzhin).
• Backported in #13479: Fix queries with constant columns and ORDER BY prefix of primary key. #13396 (Anton Popov).
• Backported in #13487: Fix empty output for Arrow and Parquet formats in case if query return zero rows. It was done because empty output is not valid for this formats. #13399 (hcz).
• Backported in #13524: Fix possible race in StorageMemory. https://clickhouse-test-reports.s3.yandex.net/0/9cac8a7244063d2092ad25d45502611e18d3749c/stress_test_(thread)/stderr.log Have no idea how to write a test. #13416 (Nikolai Kochetov).
• Backported in #13483: Fix invalid return type for comparison of tuples with NULL elements. Fixes #12461. #13420 (Nikolai Kochetov).
• Backported in #13462: Fix error in parseDateTimeBestEffort function when unix timestamp was passed as an argument. This fixes #13362. #13441 (Alexey Milovidov).
• Backported in #13552: Fix secondary indices corruption in compact parts. #13538 (Anton Popov).
• Backported in #13662: Concurrent ALTER ... REPLACE/MOVE PARTITION ... queries might cause deadlock. It's fixed. #13626 (Alexander Tokmakov).
• Backported in #13720: Fix crash in JOIN with StorageMerge and set enable_optimize_predicate_expression=1. #13679 (Artem Zuikov).
• Backported in #13703: Do not optimize any(arrayJoin()) -> arrayJoin() under optimize_move_functions_out_of_any. #13681 (Azat Khuzhin).
• Backported in #13733: Fix incorrect message in clickhouse-server.init while checking user and group. #13711 (ylchou).
• Backported in #13902: Fix incorrect sorting for FixedString columns. Fixes #13182. #13887 (Nikolai Kochetov).