### ClickHouse release v21.7.7.47-stable FIXME as compared to v21.7.6.39-stable

#### Bug Fix
* Backported in [#27364](https://github.com/ClickHouse/ClickHouse/issues/27364): - Fix uninitialized memory in functions `multiSearch*` with empty array, close [#27169](https://github.com/ClickHouse/ClickHouse/issues/27169). [#27181](https://github.com/ClickHouse/ClickHouse/pull/27181) ([Vladimir C](https://github.com/vdimir)).
* Backported in [#27412](https://github.com/ClickHouse/ClickHouse/issues/27412): Fix `distributed_group_by_no_merge=2`+`distributed_push_down_limit=1` or `optimize_distributed_group_by_sharding_key=1` with `LIMIT BY` and `LIMIT OFFSET`. [#27249](https://github.com/ClickHouse/ClickHouse/pull/27249) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#27418](https://github.com/ClickHouse/ClickHouse/issues/27418): Fix `Cannot find column` error for queries with sampling. Was introduced in [#24574](https://github.com/ClickHouse/ClickHouse/issues/24574). Fixes [#26522](https://github.com/ClickHouse/ClickHouse/issues/26522). [#27301](https://github.com/ClickHouse/ClickHouse/pull/27301) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#27416](https://github.com/ClickHouse/ClickHouse/issues/27416): Fixed incorrect validation of partition id for MergeTree tables that created with old syntax. [#27328](https://github.com/ClickHouse/ClickHouse/pull/27328) ([Alexander Tokmakov](https://github.com/tavplubix)).