I couldn't help but try to add the write side, even though for now I have no
need for it.
I'll look at your suggestions below. Thanks.
> On Sep 30, 2016, at 7:09 PM, Mike Bayer <mike...@zzzcomputing.com> wrote:
>
> ha see you *are* doing the write side.
>
> the bind_expression() hook is here to allow you to re-render the expression.
> assuming value-bound bindparam() objects (e.g. not like you'd get with an
> INSERT or UPDATE usually), the value should be present and you can do this
> (had to work up a POC):
>
> from sqlalchemy import *
> from sqlalchemy.types import UserDefinedType
>
>
> class T(UserDefinedType):
>
> def bind_expression(self, colexpr):
> return literal_column(colexpr.value) # or whatever is needed here
>
> t = table('t', column('x', T()))
>
> print t.select().where(t.c.x == 'hi')
>
>> Also, is there a way, inside VARRAY.__init__() or some other place that
>> is called before table creation to specify the sa.event.listen(<table>,
>> "before_create", self.create_ddl().execute_if(dialect='oracle'))?
>
> look into adding SchemaType as a mixin, it signals to the owning Column that
> it should receive events. You can then add the events to your type itself
> like before_parent_attach which should fire for the Column.
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