I have also asked this question on Stackoverflow and DBA stack exchange with no answer. It's a fairly long post, so I will post a link to it, as on Stackoverflow it is formatted nicely
Any idea why my query slows down so much when I add account.residence_details::jsonb ?& array['city', 'state', 'streetName'] ?
The planner has no insight into what fraction of rows will satisfy the ?& condition, and falls back on the assumption that very few will. This is (apparently) a very bad assumption, and causes it choose a bad plan.
Rewriting the `phone_number.account_id IN (subquery)` into an exists query might help.
