zlacker

Clickhouse supports MySQL protocol natively, and can also wrap/import MySQL tables. Okay so you need two connections but it works pretty well.

replies(1): >>gempir+qw2

>>rjh29+(OP)
It even supported running as a MySQL Replica at some point.

"MaterializedMySQL"

Sadly that feature seems to have been thrown out, probably due to complexity.

replies(1): >>tempes+bK2

>>gempir+qw2
Mostly due to support, at least on the PG side.

They bought peerdb and offer it as clickhouse pipes so I suspect the incentive to support that feature is pretty low