### ClickHouse release v21.8.9.13-lts FIXME as compared to v21.8.8.29-lts

#### Improvement
* Backported in [#29941](https://github.com/ClickHouse/ClickHouse/issues/29941): Update zoneinfo files to 2021c. [#29925](https://github.com/ClickHouse/ClickHouse/pull/29925) ([Alexey Milovidov](https://github.com/alexey-milovidov)).

#### Bug Fix
* Backported in [#29817](https://github.com/ClickHouse/ClickHouse/issues/29817): Allow using a materialized column as the sharding key in a distributed table even if `insert_allow_materialized_columns=0`:. [#28637](https://github.com/ClickHouse/ClickHouse/pull/28637) ([Vitaly Baranov](https://github.com/vitlibar)).
* Backported in [#29973](https://github.com/ClickHouse/ClickHouse/issues/29973): Fix shutdown of `AccessControlManager`. Now there can't be reloading of the configuration after AccessControlManager has been destroyed. This PR fixes the flaky test [test_user_directories/test.py::test_relative_path](https://clickhouse-test-reports.s3.yandex.net/0/f0e3122507ed8bea3f177495531c7d56bcb32466/integration_tests_(thread).html). [#29951](https://github.com/ClickHouse/ClickHouse/pull/29951) ([Vitaly Baranov](https://github.com/vitlibar)).

#### Bug Fix (user-visible misbehaviour in official stable or prestable release)

* Backported in [#29676](https://github.com/ClickHouse/ClickHouse/issues/29676): Fix vertical merges of projection parts. This fixes [#29253](https://github.com/ClickHouse/ClickHouse/issues/29253) . This PR also fixes several projection merge/mutation issues introduced in https://github.com/ClickHouse/ClickHouse/pull/25165. [#29337](https://github.com/ClickHouse/ClickHouse/pull/29337) ([Amos Bird](https://github.com/amosbird)).
* Backported in [#29538](https://github.com/ClickHouse/ClickHouse/issues/29538): Fix possible `Block structure mismatch` for subqueries with pushed-down `HAVING` predicate. Fixes [#29010](https://github.com/ClickHouse/ClickHouse/issues/29010). [#29475](https://github.com/ClickHouse/ClickHouse/pull/29475) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#29589](https://github.com/ClickHouse/ClickHouse/issues/29589): In ODBC bridge add retries for error Invalid cursor state. It is a retriable error. Closes [#29473](https://github.com/ClickHouse/ClickHouse/issues/29473). [#29518](https://github.com/ClickHouse/ClickHouse/pull/29518) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Backported in [#29593](https://github.com/ClickHouse/ClickHouse/issues/29593): Fix bug in check `pathStartsWith` becuase there was bug with the usage of `std::mismatch`: ` The behavior is undefined if the second range is shorter than the first range.`. [#29531](https://github.com/ClickHouse/ClickHouse/pull/29531) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Backported in [#29628](https://github.com/ClickHouse/ClickHouse/issues/29628): Fix rare segfault in `ALTER MODIFY` query when using incorrect table identifier in `DEFAULT` expression like `x.y.z...` Fixes [#29184](https://github.com/ClickHouse/ClickHouse/issues/29184). [#29573](https://github.com/ClickHouse/ClickHouse/pull/29573) ([alesapin](https://github.com/alesapin)).
* Backported in [#29752](https://github.com/ClickHouse/ClickHouse/issues/29752): Condition in filter predicate could be lost after push-down optimisation. [#29625](https://github.com/ClickHouse/ClickHouse/pull/29625) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#29840](https://github.com/ClickHouse/ClickHouse/issues/29840): Fixed incorrect behaviour of setting `materialized_postgresql_tables_list` at server restart. Found in [#28529](https://github.com/ClickHouse/ClickHouse/issues/28529). [#29686](https://github.com/ClickHouse/ClickHouse/pull/29686) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Backported in [#29847](https://github.com/ClickHouse/ClickHouse/issues/29847): Fix concurrent access to `LowCardinality` during `GROUP BY` (leads to SIGSEGV). [#29782](https://github.com/ClickHouse/ClickHouse/pull/29782) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#29911](https://github.com/ClickHouse/ClickHouse/issues/29911): Fix bad cast in `ATTACH TABLE ... FROM 'path'` query when non-string literal is used instead of path. It may lead to reading of uninitialized memory. [#29790](https://github.com/ClickHouse/ClickHouse/pull/29790) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#29867](https://github.com/ClickHouse/ClickHouse/issues/29867): Avoid `Timeout exceeded: elapsed 18446744073.709553 seconds` error that might happen in extremely rare cases, presumably due to some bug in kernel. Fixes [#29154](https://github.com/ClickHouse/ClickHouse/issues/29154). [#29811](https://github.com/ClickHouse/ClickHouse/pull/29811) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Backported in [#29877](https://github.com/ClickHouse/ClickHouse/issues/29877): Fix system tables recreation check (fails to detect changes in enum values). [#29857](https://github.com/ClickHouse/ClickHouse/pull/29857) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#30210](https://github.com/ClickHouse/ClickHouse/issues/30210): Fix possible data-race between `FileChecker` and `StorageLog`/`StorageStripeLog`. [#29959](https://github.com/ClickHouse/ClickHouse/pull/29959) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#30069](https://github.com/ClickHouse/ClickHouse/issues/30069): Fix crash of sample by `tuple()`, closes [#30004](https://github.com/ClickHouse/ClickHouse/issues/30004). [#30016](https://github.com/ClickHouse/ClickHouse/pull/30016) ([flynn](https://github.com/ucasfl)).
* Backported in [#30125](https://github.com/ClickHouse/ClickHouse/issues/30125): Dropped `Memory` database might reappear after server restart, it's fixed ([#29795](https://github.com/ClickHouse/ClickHouse/issues/29795)). Also added `force_remove_data_recursively_on_drop` setting as a workaround for `Directory not empty` error when dropping `Ordinary` database (because it's not possible to remove data leftovers manually in cloud environment). [#30054](https://github.com/ClickHouse/ClickHouse/pull/30054) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Backported in [#30263](https://github.com/ClickHouse/ClickHouse/issues/30263): FlatDictionary, HashedDictionary fix bytes_allocated calculation for nullable attributes. [#30238](https://github.com/ClickHouse/ClickHouse/pull/30238) ([Maksim Kita](https://github.com/kitaisreal)).

#### NO CL CATEGORY

* Avoid deadlocks when reading and writting on JOIN Engine tables at the same time. [#30187](https://github.com/ClickHouse/ClickHouse/pull/30187) ([Raúl Marín](https://github.com/Algunenano)).