right, ColumnElement doesn't export the "froms" from it's expression by default.
There's a method you can implement to do this, but here is another approach
that doesn't use any private APIs:
from sqlalchemy.sql.expression import FunctionElement
class PGCompositeElement(FunctionElement):
def __init__(self, base, field, type_):
self.name = field
super(PGCompositeElement, self).__init__(base)
self.type = to_instance(type_)
On Mar 24, 2013, at 6:40 PM, Tobias Bieniek <[email protected]>
wrote:
> I've added a small standalone script at
> https://gist.github.com/Turbo87/5233888
>
> The output is "SELECT (SomeFunction("table".foo)).attr1 AS anon_1", without
> any FROM clause.
>
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