On Wed, Jan 17, 2018 at 5:50 PM, YiFei zhuyifei1999@gmail.com wrote:
SELECT ... FROM `<database>`.`<table>`, like in https://quarry.wmflabs.org/query/24212. This should work in the foreseeable future, during which all the replica databases are accessible on the same server.
This is bad advice. Just last week[1] one of our DBAs warned this list that that ability is not guaranteed or supported, and changing that is indeed a possibility.
[1]: https://lists.wikimedia.org/pipermail/cloud/2018-January/000169.html