| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Noah Misch <noah(at)leadboat(dot)com> |
| Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, Jim Nasby <jim(dot)nasby(at)openscg(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: [HACKERS] Re: Improve OR conditions on joined columns (common star schema problem) |
| Date: | 2018-10-02 14:53:40 |
| Message-ID: | 1696.1538492020@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Noah Misch <noah(at)leadboat(dot)com> writes:
> On Mon, Oct 01, 2018 at 09:32:10PM -0400, Tom Lane wrote:
>> FWIW, my problem with this patch is that I remain unconvinced of the basic
>> correctness of the transform (specifically the unique-ification approach).
>> Noah's points would be important to address if we were moving the patch
>> towards commit, but I don't see much reason to put effort into it until
>> we can think of a way to prove whether that works.
> Not even effort to fix the assertion failures I reported?
If it seemed relevant to the proof-of-correctness problem, I would look
into it, but ...
regards, tom lane
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