- anonymous column expressions are automatically labeled.

    e.g. select([x* 5]) produces "SELECT x * 5 AS anon_1".
    This allows the labelname to be present in the cursor.description
    which can then be appropriately matched to result-column processing
    rules. (we can't reliably use positional tracking for result-column
    matches since text() expressions may represent multiple columns).

  - operator overloading is now controlled by TypeEngine objects - the
    one built-in operator overload so far is String types overloading
    '+' to be the string concatenation operator.
    User-defined types can also define their own operator overloading
    by overriding the adapt_operator(self, op) method.

  - untyped bind parameters on the right side of a binary expression
    will be assigned the type of the left side of the operation, to better
    enable the appropriate bind parameter processing to take effect
    [ticket:819]

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/sqlalchemy/databases/postgres.py b/lib/sqlalchemy/databases/postgres.py
index 00b297f97..88ac0e202 100644
--- a/lib/sqlalchemy/databases/postgres.py
+++ b/lib/sqlalchemy/databases/postgres.py
@@ -109,7 +109,7 @@ class PGBoolean(sqltypes.Boolean):
     def get_col_spec(self):
         return "BOOLEAN"
 
-class PGArray(sqltypes.TypeEngine, sqltypes.Concatenable):
+class PGArray(sqltypes.Concatenable, sqltypes.TypeEngine):
     def __init__(self, item_type):
         if isinstance(item_type, type):
             item_type = item_type()