`OracleSchemaManager::dropTable` does not drop AI sequence if AI trigger is not present

[mvorisek]

Bug Report

Q	A
Version	3.1.4

Summary & Current behaviour

OracleSchemaManager::dropTable does not drop AI sequence if AI trigger is not present

How to reproduce

create Oracle table using standard Oracle DBAL schema/platform manager and drop created AI trigger - this state is present when table create or crop table did not complete previously

Expected behaviour

AI sequence is dropped no matter if AI trigger is present

[morozov]

Looks similar to #4745. Both behaviors seem intended but are in fact bugs. No, this one is just a bug that the platform doesn't handle the failure of DROP TRIGGER if there's no trigger.