Error when accessing commit or rollback

[3FANG]

I connected clickhouse+asynch to alembic, created revision --autogenerate, but when I was about to move the changes to the database I got an exception - asynch.errors.NotSupportedError: Code: None. I looked in the code and saw this, what is it?

[long2ice]

Because ClickHouse does not support transaction

[stankudrow]

@long2ice , hello. I think this PR can be closed + some of the dangling issues that were solved already.