Sometimes SQLDEVELOPER is not returning data from Oracle Standard Policy Based Tables even after setting the policy context
i.e.
MO_GLOBAL.SET_POLICY_CONTEXT('S', 83);
select * from org_organization_definitions; is returning 0 results
Proposed Solutions:
Add this line in sqldeveloper.conf file and try one more time
AddVMOption -Doracle.net.disableOob=true