https://bugzilla.wikimedia.org/show_bug.cgi?id=67602

--- Comment #1 from Marc A. Pelletier <[email protected]> ---
That query is unlikely to be usable as-in with federation, at least not in its
current form (using a federated table requires that the rows selected during a
join are strictly constrained on indexed columns).  In particular, the way the
joins are structured will require several full table scans because the
relations are not visible to federation, only the presence or absence of
indices.

Arguably, doing this at the application level is the only correct solution as
the load on the database would be orders of magnitude smaller and the queries
much more manageable.

I will try to coordinate resources to help you adapt those bots as quickly as
possible.

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