Project: ClickHouse (App Definition and Development / Database)
File: v21.5.7.9-stable.md

sidebar_position: 1 sidebar_label: 2022 Backported in : Disable minbytestousemmap_io by default. (). Backported in : Here will be listed all the bugs that I am gonna to fix in this PR. (). Backported in : Avoid hiding errors like `Limit for rows or bytes to read exceeded` for scalar subqueries. (). Backported in : Fix implementation of connection pool of PostgreSQL engine. Closes . (). Backported in : Use old modulo function version when used in partition key. Closes . (). Backported in : In "multipart/form-data" message consider the CRLF preceding a boundary as part of it. Fixes . (). Backported in : - Fixed the deadlock that can happen during LDAP role (re)mapping, when LDAP group is mapped to a nonexistent local role. (). Backported in : Fix bug which can lead to ZooKeeper client hung inside clickhouse-server. (). Backported in : - If ZooKeeper connection was lost and replica was cloned after restoring the connection, its replication queue might contain outdated entries. It's fixed. - Fixed crash when replication queue contains intersecting virtual parts. It may rarely happen if some data part was lost. Print error in log instead of terminating. (). Backported in : Fix bug when exception `Mutation was killed` can be thrown to the client on mutation wait when mutation not loaded into memory yet. (). Backported in : Allow NULL values in postgresql protocol. Closes . (). Backported in : Fix "Missing columns" exception when joining Distributed Materialized View. (). Backported in : Fix extremely rare bug on low-memory servers which can lead to the inability to perform merges without restart. Possibly fixes . (). Backported in : Fixed bug with declaring S3 disk at root of bucket. Earlier, it reported an error: ``` (). Backported in : Fix possible heap-buffer-overflow in Arrow. (). Backported in : Fix limit/offset settings for distributed queries (ignore on the remote nodes).

Backported in : Fix extremely rare error `Tagging already tagged part` in replication queue during concurrent `alter move/replace partition`. Possibly fixes . (). Backported in : Fix serialization of splitted nested messages in Protobuf format. This PR fixes . (). Backported in : Distinguish KILL MUTATION for different tables (fixes unexpected `Cancelled mutating parts` error). (). Backported in : Fix bug which allows creating tables with columns referencing themselves like `a UInt32 ALIAS a + 1` or `b UInt32 MATERIALIZED b`. Fixes , . (). Backported in : Fix bug with constant maps in mapContains that lead to error `empty column was returned by function mapContains`. Closes . (). Backported in : Fix crash in query with cross join and `joinedsubqueryrequires_alias = 0`. Fixes . (). Backported in : Fixed an error which occurred while inserting a subset of columns using CSVWithNames format. Fixes . (). Backported in : Fix TOCTOU error in installation script. (). Backported in : Fix joinGetOrNull with not-nullable columns. This fixes . (). Backported in : Fix Logical Error Cannot sum Array/Tuple in min/maxMap. (). Backported in : Support `SimpleAggregateFunction(LowCardinality)` for `SummingMergeTree`. Fixes . (). Backported in : On ZooKeeper connection loss `ReplicatedMergeTree` table might wait for background operations to complete before trying to reconnect. It's fixed, now background operations are stopped forcefully. (). Backported in : Fix the possibility of non-deterministic behaviour of the `quantileDeterministic` function and similar. This closes . (). Backported in : Fix lost `WHERE` condition in expression-push-down optimization of query plan (setting `queryplanfilterpushdown = 1` by default). Fixes . (). Backported in : Fix `REPLACE` column transformer when used in DDL by correctly quoting the formated query. This fixes . (). Backported in : Fix segfault when sharding_key is absent in task config for copier. (). NO CL ENTRY: 'Revert "Backport to 21.5: Remove endless `wait` from ZooKeeper client"'. (). Try fix `testconsistentpartsafterclone_replica` (). DictionaryLoader unnecessary dictionary configuration creation fix (). odbc fix ().