References to objects that are defined within a package
must sometimes be qualified with the package name.
To reference the objects that are declared in a package specification,
specify the package name, a period character, and then the name of
the object. If the package is not defined in the current schema, specify
the schema name as well. For example:
package_name.type_name
package_name.item_name
package_name.subprogram_name
schema.package_name.subprogram_name
Example
The following example contains a
reference to a function named GET_DEPT_NAME that is defined in a package
named EMP_ADMIN:
select emp_admin.get_dept_name(10) from dept