### ClickHouse release v21.3.11.5-lts FIXME as compared to v21.3.10.1-lts

#### Improvement
* Backported in [#24085](https://github.com/ClickHouse/ClickHouse/issues/24085): Support specifying table schema for postgresql dictionary source. Closes [#23958](https://github.com/ClickHouse/ClickHouse/issues/23958). [#23980](https://github.com/ClickHouse/ClickHouse/pull/23980) ([Kseniia Sumarokova](https://github.com/kssenii)).

#### Bug Fix
* Backported in [#24002](https://github.com/ClickHouse/ClickHouse/issues/24002): Fix SIGSEGV for external GROUP BY and overflow row (i.e. queries like `SELECT FROM GROUP BY WITH TOTALS SETTINGS max_bytes_before_external_group_by>0, max_rows_to_group_by>0, group_by_overflow_mode='any', totals_mode='before_having'`). [#23962](https://github.com/ClickHouse/ClickHouse/pull/23962) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#24032](https://github.com/ClickHouse/ClickHouse/issues/24032): Fix crash in MergeJoin, close [#24010](https://github.com/ClickHouse/ClickHouse/issues/24010). [#24013](https://github.com/ClickHouse/ClickHouse/pull/24013) ([Vladimir C](https://github.com/vdimir)).