| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Dean Gibson (DB Administrator)" <postgresql(at)mailpen(dot)com> |
| Cc: | "pgsql-performance(at)lists(dot)postgresql(dot)org" <pgsql-performance(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: AWS forcing PG upgrade from v9.6 a disaster |
| Date: | 2021-05-31 04:44:27 |
| Message-ID: | 2524029.1622436267@sss.pgh.pa.us |
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| Lists: | pgsql-hackers pgsql-performance |
"Dean Gibson (DB Administrator)" <postgresql(at)mailpen(dot)com> writes:
> I thought that having a "USING" clause, was semantically equivalent to
> an "ON" clause with the equalities explicitly stated. So no, I didn't
> try that.
USING is not that, or at least not only that ... read the manual.
I'm wondering if what you saw is some side-effect of the aliasing
that USING does.
regards, tom lane
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