On Wed, Jun 07, 2023 at 05:16:12PM -0400, Melanie Plageman wrote: > On Fri, May 19, 2023 at 8:05 PM Tom Lane <t...@sss.pgh.pa.us> wrote: >> Considering that this is a parallel plan, I don't think there's any >> mystery about why an ORDER-BY-less query might have unstable output >> order; the only mystery is why more of the buildfarm hasn't failed. >> Can we just add "ORDER BY t1.id" to this query? It looks like you >> get the same PHJ plan, although now underneath Sort/Gather Merge. > > Yes, this was an oversight on my part. Attached is the patch that does > just what you suggested.
Confirmed that adding an ORDER BY adds a Sort node between a Gather Merge and a Parallel Hash Full Join, not removing coverage. This has fallen through the cracks and conchuela has failed again today, so I went ahead and applied the fix on HEAD. Thanks! -- Michael
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