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ClickHouse/docs/changelogs/v20.12.4.5-stable.md

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ClickHouse release v20.12.4.5-stable FIXME as compared to v20.12.3.3-stable

Bug Fix

  • Backported in #18392: Fix empty system.stack_trace table when server is running in daemon mode. #17630 (Amos Bird).
  • Backported in #18043: Fix possible segfault in topK aggregate function. This closes #17404. #17845 (Maksim Kita).
  • Backported in #18111: Fix max_distributed_connections (affects prefer_localhost_replica=1 and max_threads!=max_distributed_connections). #17848 (Azat Khuzhin).
  • Backported in #18021: Trivial query optimization was producing wrong result if query contains ARRAY JOIN (so query is actually non trivial). #17887 (sundyli).
  • Backported in #17981: fixes #15187 fixes #17912 support convert MySQL prefix index for MaterializeMySQL CC: @tavplubix. #17944 (Winter Zhang).
  • Backported in #18078: Fixed std::out_of_range: basic_string in S3 URL parsing. #18059 (Vladimir Chebotarev).
  • Backported in #18179: Fix Unknown setting profile error on attempt to set settings profile. #18167 (Alexander Tokmakov).
  • Backported in #18359: fixes #18186 fixes #16372 fix unique key convert crash in MaterializeMySQL database engine. #18211 (Winter Zhang).
  • Backported in #18258: Fix key comparison between Enum and Int types. This fixes #17989. #18214 (Amos Bird).
  • Backported in #18296: - Fixed issue when clickhouse-odbc-bridge process is unreachable by server on machines with dual IPv4/IPv6 stack; - Fixed issue when ODBC dictionary updates are performed using malformed queries and/or cause crashes; Possibly closes #14489. #18278 (Denis Glazachev).