upgrade ProxyEngine to deliver ProxyConnection, ProxyTransaction, etc.

[Mike Bayer]

ProxyEngine has fallen way behind and is still in 0.1 land. the execution of SQL now occurs within Connection. ProxyEngine should be upgraded to be aware of this and provide a better "proxying" solution, perhaps something like:

class MyEngine(ProxyEngine):
     class MyConnection(ProxyConnection):
         def execute(self, ...):
              # override execute

ProxyEngine will be smart enough to look within itself to locate the MyConnection class and use that as the connection object it produces. or something like that, doenst have to be that slick but would be nice.

[Mike Bayer]

OK this first attachment requires a monkeypatch. lets see if theres a way to not have it do that, which if necessary may mean adding a hook to Engine.

[Mike Bayer]

this could be taken by #682, or could be taken to mean the same thing. in any case, put some thought into this as it may require rearrangement of base.py.

[Mike Bayer]

ConnectionProxy was implemented in 690015bc57b5857f4baeed9ef96d94773076eb8f and merged to trunk in 4a6afd469fad170868554bf28578849bf3dfd5dd.

[Mike Bayer]

Removing milestone: 0.5.0 (automated comment)