domain: server
language: python
class Item class
Use the read-only virtual_table property to find out if the item has a
corresponding table in the project database.
If virtual_table is True there is no corresponding table in the project
database. You can use these items to work with in-memory dataset or use its
modules to write code.
Calling the
open
method creates an empty data set, and calling the
apply
method does nothing.