- added native INTERVAL type to the dialect. This supports

  only the DAY TO SECOND interval type so far due to lack
  of support in cx_oracle for YEAR TO MONTH. [ticket:1467]
- The Interval type includes a "native" flag which controls
  if native INTERVAL types (postgresql + oracle) are selected
  if available, or not.  "day_precision" and "second_precision"
  arguments are also added which propagate as appropriately
  to these native types. Related to [ticket:1467].
- DefaultDialect.type_descriptor moves back to being per-dialect.
  TypeEngine/TypeDecorator key type impls to the dialect class
  + server_version_info so that the colspecs dict can be modified
  per-dialect based on server version.
- Fixed TypeDecorator's incorrect usage of _impl_dict

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/sqlalchemy/dialects/postgresql/base.py b/lib/sqlalchemy/dialects/postgresql/base.py
index 308e23bae..2c8f896e9 100644
--- a/lib/sqlalchemy/dialects/postgresql/base.py
+++ b/lib/sqlalchemy/dialects/postgresql/base.py
@@ -109,6 +109,10 @@ class INTERVAL(sqltypes.TypeEngine):
     def adapt(self, impltype):
         return impltype(self.precision)
 
+    @classmethod
+    def _adapt_from_generic_interval(cls, interval):
+        return INTERVAL(precision=interval.second_precision)
+
     @property
     def _type_affinity(self):
         return sqltypes.Interval