| From: | David Rowley <dgrowleyml(at)gmail(dot)com> |
|---|---|
| To: | Dave Cramer <davecramer(at)gmail(dot)com> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: incorrect results and different plan with 2 very similar queries |
| Date: | 2024-03-27 21:56:54 |
| Message-ID: | CAApHDvqp-Cy3sY8dGPL-zyECCVBjrBN+WrCGg-k5cqU1NegGSA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, 28 Mar 2024 at 10:33, Dave Cramer <davecramer(at)gmail(dot)com> wrote:
> There is a report on the pgjdbc github JDBC Driver shows erratic behavior when filtering on CURRENT_DATE · pgjdbc/pgjdbc · Discussion #3184 (github.com)
>
> Here are the plans.
>
> JDBC - Nested Loop (incorrect result)
>
> Index Cond: (mutation >= ((CURRENT_DATE - '1971-12-31'::date) - 28))
> JDBC - Hash Right (correct result)
>
> Recheck Cond: (mutation >= ((CURRENT_DATE - '1971-12-31'::date) - 29))
I don't see any version details or queries, but going by the
conditions above, the queries don't appear to be the same, so
different results aren't too surprising and not a demonstration that
there's any sort of bug.
David
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