I think this is fixed in 6.4. Beta is September 1.
>
> select max(ccorderseq) from ccorder;
> max
> ---
> 603
> (1 row)
>
> icv=> select * From the_view where ccorderseq = 603;
>
> [ I get the row back ]
>
> select * From the_view where ccorderseq = (select max(ccorderseq) from ccorder);
>
> I don't get the row back. nothing has changed, the max value is still
> the same. when I write out the view as a select, the subquery works
> and I get the row.
>
> if it makes much of a difference the view is doing a "glob" query (of
> a parent and all children, i.e. select from table*)
>
>
>
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