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ClickHouse/docs/changelogs/v20.8.15.11-lts.md

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ClickHouse release v20.8.15.11-lts FIXME as compared to v20.8.14.4-lts

Bug Fix

  • Backported in #21627: Fix max_distributed_connections (affects prefer_localhost_replica=1 and max_threads!=max_distributed_connections). #17848 (Azat Khuzhin).
  • Backported in #21626: Join tries to materialize const columns, but our code waits for them in other places. #18982 (Nikita Mikhaylov).
  • Backported in #21409: Now mutations allowed only for table engines that support them (MergeTree family, Memory, MaterializedView). Other engines will report a more clear error. Fixes #21168. #21183 (alesapin).
  • Backported in #22190: Fixed race on SSL object inside SecureSocket in Poco. #21456 (Nikita Mikhaylov).
  • Backported in #21547: Fix a deadlock in ALTER DELETE mutations for non replicated MergeTree table engines when the predicate contains the table itself. Fixes #20558. #21477 (alesapin).
  • Backported in #22284: Fix bug for ReplicatedMerge table engines when ALTER MODIFY COLUMN query doesn't change the type of decimal column if its size (32 bit or 64 bit) doesn't change. #21728 (alesapin).
  • Backported in #22282: Docker entrypoint: avoid chown of . in case when LOG_PATH is empty. Closes #22100. #22102 (filimonov).
  • Backported in #22279: Fix waiting for OPTIMIZE and ALTER queries for ReplicatedMergeTree table engines. Now the query will not hang when the table was detached or restarted. #22118 (alesapin).
  • Backported in #22370: Now clickhouse will not throw LOGICAL_ERROR exception when we try to mutate the already covered part. Fixes #22013. #22291 (alesapin).

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