On Wed, Jan 31, 2024 at 12:26 PM David Rowley wrote:
> On Fri, 26 Jan 2024 at 21:14, David Rowley wrote:
> > However, having said that. Parallel plans are often picked when there
> > is some highly selective qual as parallel_tuple_cost has to be applied
> > to fewer tuples for such plans, so pro
On Fri, 26 Jan 2024 at 21:14, David Rowley wrote:
> However, having said that. Parallel plans are often picked when there
> is some highly selective qual as parallel_tuple_cost has to be applied
> to fewer tuples for such plans, so probably this is worth doing.
I was messing around with your test
On Fri, 26 Jan 2024 at 20:42, Richard Guo wrote:
>
> In 5543677ec9 we introduced an optimization that uses Limit instead of
> Unique to implement DISTINCT when all the DISTINCT pathkeys have been
> marked as redundant. I happened to notice that this optimization was
> not applied to partial DISTI
In 5543677ec9 we introduced an optimization that uses Limit instead of
Unique to implement DISTINCT when all the DISTINCT pathkeys have been
marked as redundant. I happened to notice that this optimization was
not applied to partial DISTINCT, which I think should be. This can
improve plans in som
