Igor Nikonov

> @alexey-milovidov Based on #45868, lazy projection has been implemented to improve performance. The current code implementation is quite rudimentary, but it still has some effectiveness for som queries. For...

> https://s3.amazonaws.com/clickhouse-test-reports/68591/0de3b1dacbc587e7f6789dec3fe92e276f332f56/stateful_tests__ubsan_.html I can't figure out why it failed @taiyang-li Please update the PR with recent master. It was an issue in CI, - was fixed by https://github.com/ClickHouse/ClickHouse/pull/69483/

https://s3.amazonaws.com/clickhouse-test-reports/0/002f7ded74f70e954c48a43e7f13005c6953826e/integration_tests__release__[4_4].html

> Hi @alexey-milovidov @devcrafter! Thanks for taking care of this PR, I tried to rebase the current PR but it has the previous base with flaky tests issue that cannot...

https://s3.amazonaws.com/clickhouse-test-reports/67234/389ac9e84bd8f22b8c5be8d551ca512d72f3546a/stateful_tests__tsan_.html ``` 2024-08-10 11:54:58 curl: (28) Operation timed out after 120000 milliseconds with 36866374 bytes received ```

Before merging this PR - we probably want to address https://github.com/ClickHouse/ClickHouse/issues/43854, https://github.com/ClickHouse/clickhouse-private/issues/18089

Just note for reference - https://github.com/ClickHouse/ClickHouse/pull/70659 - without enabled `parallel_replicas_for_cluster_engines` inserts from `s3()` table function will return error - https://github.com/ClickHouse/ClickHouse/pull/78041

``` E #1 0x561c62856acb in DB::Context::handleCrash() const build_docker/./src/Interpreters/Context.cpp:4081:9 ``` ^ here, tried to access shared context to flush system tables, but the shared context is already destroyed: ``` E #1...

`00961_check_table` failure in [Stateless tests (tsan, s3 storage) [1/4]](https://s3.amazonaws.com/clickhouse-test-reports/67389/2cae0cb5ecedc2fd041def829b35bdf4dbb50f2f/stateless_tests__tsan__s3_storage__[1_4].html) is unrelated

AST Fuzzer failure - https://github.com/ClickHouse/ClickHouse/issues/68162