From: Gaëtan de Menten <gdementen@gmail.com>
Date: Thu, 29 Oct 2009 21:24:33 +0000 (+0000)
Subject: large speed improvement of the Interval type on non-native dialects
X-Git-Tag: rel_0_6beta1~212
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8195ec35adf7d99c94dc87d7d3eb2c32c2be7252;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

large speed improvement of the Interval type on non-native dialects
---

diff --git a/lib/sqlalchemy/types.py b/lib/sqlalchemy/types.py
index 63a339baf8..92ff274f88 100644
--- a/lib/sqlalchemy/types.py
+++ b/lib/sqlalchemy/types.py
@@ -1072,16 +1072,17 @@ class Interval(TypeDecorator):
     """
 
     impl = DateTime
+    epoch = dt.datetime.utcfromtimestamp(0)
 
     def process_bind_param(self, value, dialect):
         if value is None:
             return None
-        return dt.datetime.utcfromtimestamp(0) + value
+        return self.epoch + value
 
     def process_result_value(self, value, dialect):
         if value is None:
             return None
-        return value - dt.datetime.utcfromtimestamp(0)
+        return value - self.epoch
 
 class FLOAT(Float):
     """The SQL FLOAT type."""