How to recreate public synonym “DUAL”?

Question

Using SQLDeveloper 4.0.1.14 to create an export script (separate files & \"drops\" checked), it generated me those 4 lines among others in DROP.sql:

Answer 1

Try it as SYS but without the doauble quotes, i.e.:

CREATE OR REPLACE PUBLIC SYNONYM DUAL FOR SYS.DUAL;

not

CREATE OR REPLACE PUBLIC SYNONYM "DUAL" FOR "SYS"."DUAL";

As I understand it the double quotes make the object name case sensitive.

Update - If you have access to metalink then you will find the answer in note 973260.1, something aboput a trigger firing :

ALTER SYSTEM SET "_SYSTEM_TRIG_ENABLED"=FALSE SCOPE=MEMORY;
CREATE OR REPLACE PUBLIC SYNONYM DUAL FOR SYS.DUAL;
ALTER SYSTEM SET "_SYSTEM_TRIG_ENABLED"=true SCOPE=MEMORY;

The note suggest that if this doesnt work, query DBA_TRIGGERS to find a BEFORE CREATE trigger enabled, and if found disable it and then re-issue create synonym statement, then re-enable the trigger.