> Hm. I guess the problem here is that `pg_dump -s` creates the view
> WITH NO DATA. But how exactly did you run the upgrade -- a normal
> `pg_dump` of a pglister database will include a `REFRESH MATERIALIZED
> VIEW` command right at the end.
I used pg_upgradecluster with no additional option (sudo -u postgres pg_upgradecluster 12 main).
> This may be an issue in how pg_upgradecluster executes it perhaps?
Do you mean that the issue could be with pg_upgradecluster then?
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Célestin Matte