On Thu, 23 Sept 2021 at 13:28, David G. Johnston
<david.g.johnston@gmail.com> wrote:
> Agreed, though if the query author needs to do that here we’ve violated the spirit of the declarative SQL language.
Atfirst blush nothing about the original query seems like it should be preventing parallelism. Each worker builds its
owndistinct array then the final concatenation is made distinct.
We don't parallelise DISTINCT / ORDER BY aggregates.
David