1 files changed, 33 insertions, 13 deletions
diff --git a/lib/sqlalchemy/sql.py b/lib/sqlalchemy/sql.py
index c3d0f9de0..280ebd81c 100644
--- a/lib/sqlalchemy/sql.py
+++ b/lib/sqlalchemy/sql.py
@@ -914,25 +914,45 @@ class _CompareMixin(object):
         """produce an ``IN`` clause."""
         if len(other) == 0:
             return self.__eq__(None)
-        elif len(other) == 1 and not hasattr(other[0], '_selectable'):
-            return self.__eq__(other[0])
-        elif _is_literal(other[0]):
-            return self._compare('IN', ClauseList(parens=True, *[self._bind_param(o) for o in other]), negate='NOT IN')
-        else:
-            # assume *other is a single select.
-            # originally, this assumed possibly multiple selects and created a UNION,
-            # but we are now forcing explictness if a UNION is desired.
-            if len(other) > 1:
-                raise exceptions.InvalidRequestException("in() function accepts only multiple literal values, or a single selectable as an argument")
-            return self._compare('IN', other[0], negate='NOT IN')
+        elif len(other) == 1:
+            o = other[0]
+            if _is_literal(o) or isinstance( o, _CompareMixin):
+                return self.__eq__( o)    #single item -> ==
+            else:
+                assert hasattr( o, '_selectable')   #better check?
+                return self._compare( 'IN', o, negate='NOT IN')   #single selectable
+
+        args = []
+        for o in other:
+            if not _is_literal(o):
+                if not isinstance( o, _CompareMixin):
+                    raise exceptions.InvalidRequestError( "in() function accepts either non-selectable values, or a single selectable: "+repr(o) )
+            else:
+                o = self._bind_param(o)
+            args.append(o)
+        return self._compare( 'IN', ClauseList( parens=True, *args), negate='NOT IN')
 
     def startswith(self, other):
         """produce the clause ``LIKE '<other>%'``"""
-        return self._compare('LIKE', other + "%")
+        perc = isinstance(other,(str,unicode)) and '%' or literal('%',type= sqltypes.String)
+        return self._compare('LIKE', other + perc)
 
     def endswith(self, other):
         """produce the clause ``LIKE '%<other>'``"""
-        return self._compare('LIKE', "%" + other)
+        if isinstance(other,(str,unicode)): po = '%' + other
+        else:
+            po = literal('%', type= sqltypes.String) + other
+            po.type = sqltypes.to_instance( sqltypes.String)     #force!
+        return self._compare('LIKE', po)
+
+    def __radd__(self, other):
+        return self._bind_param(other)._operate('+', self)
+    def __rsub__(self, other):
+        return self._bind_param(other)._operate('-', self)
+    def __rmul__(self, other):
+        return self._bind_param(other)._operate('*', self)
+    def __rdiv__(self, other):
+        return self._bind_param(other)._operate('/', self)
 
     def label(self, name):
         """produce a column label, i.e. ``<columnname> AS <name>``"""