ObjectSpace :: extentExist - Does Extent exist in database object

An extent defined logically in the database schema need not necessarily exist in an object space. Extents are created in the object space automatically when accessing them the first time with write access mode. The extent name has to be passed as scoped name, when being defined in a namespace. When defining an none scoped name, the function tries to locate any extent with the given name.

The function returns whether the extent passed in sExtentName has been already created in the object space (true) or not (false).