ORA-30772: opaque types do not have default constructors



ORA-30772: opaque types do not have default constructors..

Answer / guest

Cause: Constructor invocation did not succeed, since no
user-defined constructors were defined for the opaque type,
and since opaque types do not have default constructors.

Action: Add user-defined constructors to opaque type, or
specify a member or static method for the opaque type.

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