ClickHouse/docs/changelogs/v20.5.5.74-stable.md

ClickHouse release v20.5.5.74-stable FIXME as compared to v20.5.4.40-stable

Improvement

• Backported in #13920: 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 #13300: The function groupArrayMoving* was not working for distributed queries. It's result was calculated within incorrect data type (without promotion to the largest type). The function groupArrayMovingAvg was returning integer number that was inconsistent with the avg function. This fixes #12568. #12622 (Alexey Milovidov).
• Backported in #13030: CREATE USER IF NOT EXISTS now doesn't throw exception if the user exists. This fixes #12507. #12646 (Vitaly Baranov).
• Backported in #12996: Fix optimization optimize_move_functions_out_of_any=1 in case of any(func(<lambda>)). #12664 (Artem Zuikov).
• Backported in #13092: Fix CAST(Nullable(String), Enum()). #12745 (Azat Khuzhin).
• Backported in #12984: Fix columns duplication for range hashed dictionary created from DDL query. This fixes #10605. #12857 (alesapin).
• Backported in #13561: Fix access to redis dictionary after connection was dropped once. It may happen with cache and direct dictionary layouts. #13082 (Anton Popov).
• Backported in #13508: Fix parsing row policies from users.xml when names of databases or tables contain dots. This fixes #5779, #12527. #13199 (Vitaly Baranov).
• Backported in #13358: AvroConfluent: Skip Kafka tombstone records AvroConfluent: Support skipping broken records ... #13203 (Andrew Onyshchuk).
• Backported in #13223: Fix DateTime64 conversion functions with constant argument. #13205 (Azat Khuzhin).
• Backported in #13244: Fix assert in arrayElement function in case of array elements are Nullable and array subscript is also Nullable. This fixes #12172. #13224 (Alexey Milovidov).
• Backported in #13268: Fix function if with nullable constexpr as cond that is not literal NULL. Fixes #12463. #13226 (Alexey Milovidov).
• Backported in #13351: Return passed number for numbers with MSB set in roundUpToPowerOfTwoOrZero(). #13234 (Azat Khuzhin).
• Backported in #13299: Fix potentially low performance and slightly incorrect result for uniqExact, topK, sumDistinct and similar aggregate functions called on Float types with NaN values. It also triggered assert in debug build. This fixes #12491. #13254 (Alexey Milovidov).
• Backported in #13315: The server may crash if user passed specifically crafted arguments to the function h3ToChildren. This fixes #13275. #13277 (Alexey Milovidov).
• Backported in #13328: Fix possible error Totals having transform was already added to pipeline in case of a query from delayed replica. #13290 (Nikolai Kochetov).
• Backported in #13609: Fix missing or excessive headers in TSV/CSVWithNames formats. This fixes #12504. #13343 (Azat Khuzhin).
• Backported in #13482: Fix queries with constant columns and ORDER BY prefix of primary key. #13396 (Anton Popov).
• Backported in #13488: 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 #13569: 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 #13442: Fix aggregate function any(x) is found inside another aggregate function in query error with SET optimize_move_functions_out_of_any = 1 and aliases inside any(). #13419 (Artem Zuikov).
• Backported in #13486: Fix invalid return type for comparison of tuples with NULL elements. Fixes #12461. #13420 (Nikolai Kochetov).
• Backported in #13463: Fix error in parseDateTimeBestEffort function when unix timestamp was passed as an argument. This fixes #13362. #13441 (Alexey Milovidov).
• Backported in #13663: Concurrent ALTER ... REPLACE/MOVE PARTITION ... queries might cause deadlock. It's fixed. #13626 (Alexander Tokmakov).
• Backported in #13717: Fix crash in JOIN with StorageMerge and set enable_optimize_predicate_expression=1. #13679 (Artem Zuikov).
• Backported in #13701: Do not optimize any(arrayJoin()) -> arrayJoin() under optimize_move_functions_out_of_any. #13681 (Azat Khuzhin).
• Backported in #13732: Fix incorrect message in clickhouse-server.init while checking user and group. #13711 (ylchou).
• Backported in #13903: Fix incorrect sorting for FixedString columns. Fixes #13182. #13887 (Nikolai Kochetov).