On Wed, Apr 27, 2022 at 4:27 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
>
> On 2022-Apr-27, Amit Kapila wrote:
>
> > On Wed, Apr 27, 2022 at 3:13 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
>
> > > > Changing this to behave the way you expect would be quite difficult,
> > > > because at the moment we build a single OR expression from all the row
> > > > filters. We'd have to keep the individual expressions, so that we can
> > > > build a column list for each of them (in order to ignore those that
> > > > don't match).
> > >
> > > I think we should do that, yeah.
> >
> > This can hit the performance as we need to evaluate each expression
> > for each row.
>
> So we do things because they are easy and fast, rather than because they
> work correctly?
>
The point is I am not sure if what you are saying is better behavior
than current but if others feel it is better then we can try to do
something for it. In the above sentence, I just wanted to say that it
will impact performance but if that is required then sure we should do
it that way.
--
With Regards,
Amit Kapila.