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@mfilej
Created July 7, 2013 11:02
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Rake task to terminate idle postgresql connections that prevent a database to be dropped
# http://stackoverflow.com/questions/5108876/kill-a-postgresql-session-connection
namespace :db do
desc "Fix 'database is being accessed by other users'"
task :terminate => :environment do
ActiveRecord::Base.connection.execute <<-SQL
SELECT
pg_terminate_backend(pid)
FROM
pg_stat_activity
WHERE
-- don't kill my own connection!
pid <> pg_backend_pid()
-- don't kill the connections to other databases
AND datname = '#{ActiveRecord::Base.connection.current_database}';
SQL
end
end
Rake::Task["db:drop"].enhance ["db:terminate"]
@plindelauf
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Looks promising, since I'm looking for a solution for a similar problem. Unfortunately, my problem occurs in the test environment, and when I try to run the rake db:terminate, it runs in the development environment. Is there an easy way to make this task work in a test enviroment as well?

@haslo
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haslo commented Aug 6, 2013

@plindelauf I'm sure you've fixed your problem meanwhile, but otherwise, try rake db:terminate RAILS_ENV=test.

@l0c0luke
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a star is not really enough for this. thank you ever so much.

@ayb
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ayb commented Jul 18, 2016

+1 just found this and came in very handy

Thanks!!

@FsDevNinja
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Awesome. Worked like a charm!

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