Tomas Vondra writes:
> My personal experience is that the growEnabled heuristics is overly
> sensitive, and probably does not trigger very often.
Yeah, it would be good to make it not quite all-or-nothing.
> But more importantly, wasn't the issue discussed in [1] about parallel
> hash joins?
I'
On 5/6/25 01:11, Tom Lane wrote:
> The attached patch is a response to the discussion at [1], where
> it emerged that lots of rows with null join keys can send a hash
> join into too-many-batches hell, if they are on the outer side
> of the join so that they must be null-extended not just discarded
