Re: pgsql: Teach planner about more monotonic window functions

On 2023-Jan-27, David Rowley wrote:

> Teach planner about more monotonic window functions
> 
> 9d9c02ccd introduced runConditions for window functions to allow
> monotonic window function evaluation to be made more efficient when the
> window function value went beyond some value that it would never go back
> from due to its monotonic nature.  That commit added prosupport functions
> to inform the planner that row_number(), rank(), dense_rank() and some
> forms of count(*) were monotonic.  Here we add support for ntile(),
> cume_dist() and percent_rank().

I think this commit missed a catversion bump.


-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/