Re: Query on pg_stat_activity table got stuck

I wrote:
> This patch is against HEAD --- I've not looked at how much adjustment
> it'll need for the back branches, but I'm sure there's some.

I've back-patched this now.  If you want to test the patch, the v10-branch
version is at

https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=c3d113136bbaa86fbf1edde7aaf70ba06a6166b7

            regards, tom lane