ClickHouse/docs/changelogs/v20.6.5.8-stable.md

ClickHouse release v20.6.5.8-stable FIXME as compared to v20.6.4.44-stable

Performance Improvement

• Backported in #14189: Slightly optimize very short queries with LowCardinality. #14129 (Anton Popov).

Improvement

• Backported in #13950: Fix wrong error for long queries. It was possible to get syntax error other than Max query size exceeded for correct query. #13928 (Nikolai Kochetov).

Bug Fix

• Backported in #14090: Removed wrong auth access check when using ClickHouseDictionarySource to query remote tables. #12756 (sundyli).
• Backported in #13610: Fix missing or excessive headers in TSV/CSVWithNames formats. This fixes #12504. #13343 (Azat Khuzhin).
• Backported in #13413: Fixed the deadlock in textlog. It is a part of #12339. This fixes #12325. #13386 (Nikita Mikhaylov).
• Backported in #13537: Fix wrong code in function netloc. This fixes #13335. #13446 (Alexey Milovidov).
• Backported in #14016: Fix premature ON CLUSTER timeouts for queries that must be executed on a single replica. Fixes #6704, Fixes #7228, Fixes #13361, Fixes #11884. #13450 (alesapin).
• Backported in #14000: Fixed the behaviour when sometimes cache-dictionary returned default value instead of present value from source. #13624 (Nikita Mikhaylov).
• Backported in #14108: Fix visible data clobbering by progress bar in client in interactive mode. This fixes #12562 and #13369 and #13584 and fixes #12964. #13691 (Alexey Milovidov).
• Backported in #14081: Fixes /replicas_status endpoint response status code when verbose=1. #13722 (javi santana).
• Backported in #13776: Fix logging Settings.Names/Values when log_queries_min_type > QUERY_START. #13737 (Azat Khuzhin).
• Backported in #13772: Fix race condition between DETACH and background merges. Parts may revive after detach. This is continuation of #8602 that did not fix the issue but introduced a test that started to fail in very rare cases, demonstrating the issue. #13746 (Alexey Milovidov).
• Backported in #13788: Add range check for h3KRing function. This fixes #13633. #13752 (Alexey Milovidov).
• Backported in #13801: Fix step overflow in range(). #13790 (Azat Khuzhin).
• Backported in #13810: Fix reading from MergeTree table with INDEX of type SET fails when comparing against NULL. This fixes #13686. #13793 (Amos Bird).
• Backported in #13833: Fix topK/topKWeighted merge (with non-default parameters). #13817 (Azat Khuzhin).
• Backported in #13974: Fixed potential deadlock when renaming Distributed table. #13922 (Alexander Tokmakov).
• Backported in #14061: Fix wrong results in select queries with DISTINCT keyword in case optimize_duplicate_order_by_and_distinct setting is enabled. #13925 (Artem Zuikov).
• Backported in #14076: Fixed wrong mount point in extra info for Poco::Exception: no space left on device. #14050 (Alexander Tokmakov).
• Backported in #14138: Fix pointInPolygon with const 2d array as polygon. #14079 (Alexey Ilyukhov).
• Backported in #14172: Fix creation of tables with named tuples. This fixes #13027. #14143 (Alexey Milovidov).
• Backported in #14294: Fix crash when INERT INTO Kafka engine table from an empty result set with a subquery. ... #14203 (Dongdong Yang).
• Backported in #14243: Fixed incorrect sorting order if LowCardinality column. This fixes #13958. #14223 (Nikita Mikhaylov).
• Backported in #14306: Fix segfault in clickhouse-odbc-bridge during schema fetch from some external sources. This PR fixes #13861. #14267 (Vitaly Baranov).
• Backported in #14340: Fix crash during ALTER query for table which was created AS table_function. Fixes #14212. #14326 (alesapin).