Andrew Lazarus <andrew@pillette.com> writes:
> I have a cascading delete trigger that is obviously using a seqscan.
> (Explain analyze shows that trigger as taking over 1000s while all
> other triggers are <1s. The value in test delete didn't even appear in
> this child table, so an index scan would have been almost instant.)
> If I do
> DELETE FROM child_table WHERE fkey = value;
> I get an index scan. Why doesn't the trigger do that, and how can I
> force it to re-plan?
That would depend on what PG version you're using.
However, starting a fresh connection should get you a new trigger
function plan in any case.
regards, tom lane