24.03.2016, 18:03, Tom Lane kirjoitti:
Robert Haas <robertmh...@gmail.com> writes:
I am not really in favor of half-fixing this.  If we can't
conveniently wait until a dropped role is completely out of the
system, then I don't see a lot of point in trying to do it in the
limited cases where we can.  If LEFT JOIN is the way to go, then,
blech, but, so be it.

I concur.  Let's put the left join(s) into those views and call it

BTW, I think we would need the left joins even if we had interlocking
in DROP, just to protect ourselves against race conditions.  Remember
that what pg_stat_activity shows is a snapshot, which might be more or
less out of date compared to the catalog contents.

Added my patch to the 2016-09 commitfest (https://commitfest.postgresql.org/10/601/) as a bug fix as I thought not showing all backends in pg_stat_activity is a bug. Any chance to get it in 9.6?

Oskari Saarenmaa
Aiven: managed cloud databases

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