### ClickHouse release v20.6.3.28-stable FIXME as compared to v20.6.2.15-prestable

#### Bug Fix
* Backported in [#13301](https://github.com/ClickHouse/ClickHouse/issues/13301): The function `groupArrayMoving*` was not working for distributed queries. It's result was calculated within incorrect data type (without promotion to the largest type). The function `groupArrayMovingAvg` was returning integer number that was inconsistent with the `avg` function. This fixes [#12568](https://github.com/ClickHouse/ClickHouse/issues/12568). [#12622](https://github.com/ClickHouse/ClickHouse/pull/12622) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13029](https://github.com/ClickHouse/ClickHouse/issues/13029): CREATE USER IF NOT EXISTS now doesn't throw exception if the user exists. This fixes [#12507](https://github.com/ClickHouse/ClickHouse/issues/12507). [#12646](https://github.com/ClickHouse/ClickHouse/pull/12646) ([Vitaly Baranov](https://github.com/vitlibar)).
* Backported in [#12983](https://github.com/ClickHouse/ClickHouse/issues/12983): Fix columns duplication for range hashed dictionary created from DDL query. This fixes [#10605](https://github.com/ClickHouse/ClickHouse/issues/10605). [#12857](https://github.com/ClickHouse/ClickHouse/pull/12857) ([alesapin](https://github.com/alesapin)).
* Backported in [#13222](https://github.com/ClickHouse/ClickHouse/issues/13222): Fix DateTime64 conversion functions with constant argument. [#13205](https://github.com/ClickHouse/ClickHouse/pull/13205) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#13245](https://github.com/ClickHouse/ClickHouse/issues/13245): Fix assert in `arrayElement` function in case of array elements are Nullable and array subscript is also Nullable. This fixes [#12172](https://github.com/ClickHouse/ClickHouse/issues/12172). [#13224](https://github.com/ClickHouse/ClickHouse/pull/13224) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13267](https://github.com/ClickHouse/ClickHouse/issues/13267): Fix function if with nullable constexpr as cond that is not literal NULL. Fixes [#12463](https://github.com/ClickHouse/ClickHouse/issues/12463). [#13226](https://github.com/ClickHouse/ClickHouse/pull/13226) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13298](https://github.com/ClickHouse/ClickHouse/issues/13298): Fix potentially low performance and slightly incorrect result for `uniqExact`, `topK`, `sumDistinct` and similar aggregate functions called on Float types with NaN values. It also triggered assert in debug build. This fixes [#12491](https://github.com/ClickHouse/ClickHouse/issues/12491). [#13254](https://github.com/ClickHouse/ClickHouse/pull/13254) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13316](https://github.com/ClickHouse/ClickHouse/issues/13316): The server may crash if user passed specifically crafted arguments to the function `h3ToChildren`. This fixes [#13275](https://github.com/ClickHouse/ClickHouse/issues/13275). [#13277](https://github.com/ClickHouse/ClickHouse/pull/13277) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13329](https://github.com/ClickHouse/ClickHouse/issues/13329): Fix possible error `Totals having transform was already added to pipeline` in case of a query from delayed replica. [#13290](https://github.com/ClickHouse/ClickHouse/pull/13290) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#13317](https://github.com/ClickHouse/ClickHouse/issues/13317): Fix crash in `LEFT ASOF JOIN` with `join_use_nulls=1`. [#13291](https://github.com/ClickHouse/ClickHouse/pull/13291) ([Artem Zuikov](https://github.com/4ertus2)).
* Backported in [#13375](https://github.com/ClickHouse/ClickHouse/issues/13375): Fix segfault when function `groupArrayMovingSum` deserializes empty state. Fixes [#13339](https://github.com/ClickHouse/ClickHouse/issues/13339). [#13341](https://github.com/ClickHouse/ClickHouse/pull/13341) ([alesapin](https://github.com/alesapin)).
* Backported in [#13432](https://github.com/ClickHouse/ClickHouse/issues/13432): Fix PrettyCompactMonoBlock for clickhouse-local. Fix extremes/totals with PrettyCompactMonoBlock. Fixes [#7746](https://github.com/ClickHouse/ClickHouse/issues/7746). [#13394](https://github.com/ClickHouse/ClickHouse/pull/13394) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#13443](https://github.com/ClickHouse/ClickHouse/issues/13443): Fix `aggregate function any(x) is found inside another aggregate function in query` error with `SET optimize_move_functions_out_of_any = 1` and aliases inside `any()`. [#13419](https://github.com/ClickHouse/ClickHouse/pull/13419) ([Artem Zuikov](https://github.com/4ertus2)).
