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afterTriggerInvokeEvents and AfterTriggerExecute have always treated it as an error if the trigger OID mentioned in a queued after-trigger event can't be found. However, that fails to account for the edge case where the trigger's been dropped in the current transaction since queueing the event. There seems no very good reason to disallow that case, so instead silently do nothing if the trigger OID can't be found. This does give up a little bit of bug-detection ability, but I don't recall that these error messages have ever actually revealed a bug, so it seems mostly theoretical. Alternatives such as marking pending events DONE at the time of dropping a trigger would be complicated and perhaps introduce bugs of their own. Per bug #18517 from Alexander Lakhin. Back-patch to all supported branches. Discussion: https://postgr.es/m/18517-af2d19882240902c@postgresql.org |
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