Assignments to "_v_" attributes (they are so called "volatile"
attributes) do not change the persistent state and cannot cause
conflicts.

There must be some other modification to the procedure objects.

I should have written:

"It's possibly because of _connect method in DCOracle2 SP.py.
It assigns values to self._v_proc, self.connection
and self.errors." So except '_v_proc' there are 'connection' and 'errors' variables that are being assigned to. Maybe this it's because of them.

--
Maciej Wisniowski


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