ORA-28108
Circular Oracle Virtual Private Database (VPD) security policies detected.
Cause
VPD security policies for the same object referenced each other which could lead to infinite looping while processing the object.
Action
Examine the policy function for the predicate generated by the function. If the predicate references the object on which the policy has been created, then change the predicate because this could lead to infinite looping of applying the policy on the same object.