Work with extent definitions programmatically.
Maintains extent definitions and globals registered for use by those extents. Extent definitions most commonly originate from compiling a persistent class but can also be defined outside of any class. This class provides a public interface for deleting extent definitions and registering the extents of all managed extent classes or a single class.
In addition to the public interface implemented here, the %ExtentMgr
tables are visible to SQL and can be queried directly. There are two examples implemented in this class: GlobalUses()
. Both are public class methods that return a single result set and both are projected as stored procedures and can be invoked by dynamic SQL, embedded SQL or through an xDBC client. These methods are more important as examples of how the %ExtentMgr
tables can be queried.
© 1997-2019 InterSystems Corporation, Cambridge, MA