Added PGCidr type to postgres. Closes #1092

(cherry picked from commit 2394a6bb6c5f77afd448640ce03cf6fda0335a23)

CHANGES

@@ -164,6 +164,8 @@ CHANGES
     - Repaired server_side_cursors to properly detect 
       text() clauses.
 
+    - Added PGCidr type. [ticket:1092] 
+
 - mysql
     - Added 'CALL' to the list of SQL keywords which return
       result rows.

lib/sqlalchemy/databases/postgres.py

@@ -32,6 +32,10 @@ class PGInet(sqltypes.TypeEngine):
     def get_col_spec(self):
         return "INET"
 
+class PGCidr(sqltypes.TypeEngine):
+    def get_col_spec(self):
+        return "CIDR"
+
 class PGMacAddr(sqltypes.TypeEngine):
     def get_col_spec(self):
         return "MACADDR"
@@ -206,6 +210,7 @@ ischema_names = {
     'float' : PGFloat,
     'real' : PGFloat,
     'inet': PGInet,
+    'cidr': PGCidr,
     'macaddr': PGMacAddr,
     'double precision' : PGFloat,
     'timestamp' : PGDateTime,