On Fri, Oct 14, 2011 at 4:45 PM, Jon Nelson <[email protected]> wrote:
> What is the SA equivalent of:
>
> UPDATE foo SET bar=some_function(baz) WHERE bar IS DISTINCT FROM
> some_function(baz)
>
> I get this far (assuming 't' is a Table instance):
>
> t.update().values(t.c.bar=sa.func.some_function(t.c.baz).where( ...
> what do I put here .... )
>
> IS DISTINCT FROM (and IS NOT DISTINCT FROM) are supported in firebird
> and postgresql, and possibly others.
Is using 'op' the right way?
c = sa.func.some_function(t.c.baz)
t.update().values(t.c.bar=c).where(t.c.bar.op("IS DISTINCT FROM")(c))
--
Jon
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