Winter Zhang

> The request is for a feature to force a query to run completely on MySQL as is and return results back to CH, without CH trying to parse the...

It has been implemented in customhttp patch

I forgot about it when trying to resolve the conflict. let me check again.

@mergify update

`max_memory_usage` will be implemented in #7290, but it may take some time. at present, we can't track the memory usage accurately. We are try find reasons.

also fixes: #6525

> Another question: how to cancel a distributed query when running? When we abort the query in the request server, other nodes will perceive it through the network and abort...