This object is the object we use to keep track of all sorts of
information. Subclasses are made for each SQLObject subclass
(dynamically if necessary), and instances are created to go
alongside every SQLObject instance.
The sqlmeta class is accessible via the
__sizeof__() -> int
size of object in memory, in bytes
Abstract classes can override this to customize issubclass().
This is invoked early on by abc.ABCMeta.__subclasscheck__().
It should return True, False or NotImplemented. If it returns
NotImplemented, the normal algorithm is used. Otherwise, it
overrides the normal algorithm (and the outcome is cached).
send(cls, signal, *args, **kw)
addColumn(cls, columnDef, changeSchema=False, connection=None)
delColumn(cls, column, changeSchema=False, connection=None)
Return the object as a dictionary of columns to values.
Expire all instances of this class.
for more information.