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Query Metrics

select m.id from message m where m.sent = false and m.scheduled_at <= now()

[]

select
  m.id
from
  message m
where
  m.sent = false
  and m.scheduled_at <= now()

select m.id from message m where m.sent = false and m.scheduled_at <= now();

select q.id 
            from smartemailing_queue q 
            where processed_at is null

[]

select
  q.id
from
  smartemailing_queue q
where
  processed_at is null

select q.id 
            from smartemailing_queue q 
            where processed_at is null
        ;

SELECT pg_try_advisory_lock(1)

[]

SELECT
  pg_try_advisory_lock(1)

SELECT pg_try_advisory_lock(1);

select pg_advisory_unlock(1)

[]

select
  pg_advisory_unlock(1)

select pg_advisory_unlock(1);