On 2020-Jan-07, Mithun Cy wrote: > I have a test where a user creates a temp table and then disconnect, > concurrently we try to do DROP OWNED BY CASCADE on the same user. Seems > this causes race condition between temptable deletion during disconnection > (@RemoveTempRelations(myTempNamespace)) and DROP OWNED BY CASCADE operation > which will try to remove same temp table when they find them as part of > pg_shdepend.
Cute. This seems fiddly to handle better; maybe you'd have to have a new PERFORM_DELETION_* flag that says to ignore "missing" objects; so when you go from shdepDropOwned, you pass that flag all the way down to doDeletion(), so the objtype-specific function is called with "missing_ok", and ignore if the object has already gone away. That's tedious because none of the Remove* functions have the concept of missing_ok. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
