22.2.1.4422.

```
create table test_alias (K Int64, D Date, S String, B Int64 Alias length(S)) Engine=MergeTree order by K;
insert into test_alias select number, today(), 'sdfsdfsdfsdfsdfds' from numbers(10000000);

session1: 
clickhouse-benchmark -c 10 <<< "insert into test_alias select number, today(), 'sdfsdfsdfsdfsdfds' from numbers(10000)"

session2: 
alter table test_alias drop column B;
0 rows in set. Elapsed: 251.043 sec.
```

especially it can be a problem with S3 disks

Alias columns do not persist in parts even in columns.txt
const auto & identifier = identifier_ast->as<ASTIdentifier &>();
            auto insertion = command.settings_resets.emplace(identifier.name());
            if (!insertion.second)
                throw Exception("Duplicate setting name " + backQuote(identifier.name()),
                                ErrorCodes::BAD_ARGUMENTS);
        }
        return command;
    }
    else if (command_ast->type == ASTAlterCommand::MODIFY_QUERY)
    {
        AlterCommand command;
        command.ast = command_ast->clone();
        command.type = AlterCommand::MODIFY_QUERY;
        command.select = command_ast->select;
        return command;
    }
    else if (command_ast->type == ASTAlterCommand::RENAME_COLUMN)
    {
        AlterCommand command;
        command.ast = command_ast->clone();
        command.type = AlterCommand::RENAME_COLUMN;
        command.column_name = command_ast->column->as<ASTIdentifier &>().name();
        command.rename_to = command_ast->rename_to->as<ASTIdentifier &>().name();
        command.if_exists = command_ast->if_exists;
        return command;
    }
    else
        return {};
}
void AlterCommand::apply(StorageInMemoryMetadata & metadata, ContextPtr context) const