- The entry point resolution supported by

    create_engine() now supports resolution of
    individual DBAPI drivers on top of a built-in
    or entry point-resolved dialect, using the
    standard '+' notation - it's converted to
    a '.' before being resolved as an entry
    point.  [ticket:2286]

1 files changed, 9 insertions, 2 deletions

diff --git a/lib/sqlalchemy/engine/url.py b/lib/sqlalchemy/engine/url.py
index 0734f6035..f896eee29 100644
--- a/lib/sqlalchemy/engine/url.py
+++ b/lib/sqlalchemy/engine/url.py
@@ -104,7 +104,14 @@ class URL(object):
 
             module = __import__('sqlalchemy.dialects.%s' % (dialect, )).dialects
             module = getattr(module, dialect)
-            module = getattr(module, driver)
+            if hasattr(module, driver):
+                module = getattr(module, driver)
+            else:
+                module = self._load_entry_point()
+                if module is None:
+                    raise exc.ArgumentError(
+                        "Could not determine dialect for '%s'." % 
+                        self.drivername)
 
             return module.dialect
         except ImportError:
@@ -128,7 +135,7 @@ class URL(object):
             return None
 
         for res in pkg_resources.iter_entry_points('sqlalchemy.dialects'):
-            if res.name == self.drivername:
+            if res.name == self.drivername.replace("+", "."):
                 return res.load()
         else:
             return None