| From: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
|---|---|
| To: | Floris Van Nee <florisvannee(at)optiver(dot)com> |
| Cc: | "pgsql-bugs(at)lists(dot)postgresql(dot)org" <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: postgres reorders expressions when inlining |
| Date: | 2022-12-29 14:02:28 |
| Message-ID: | CAKFQuwZCG+pTQmHfQQeiuOLjSKYQt1QH4z2tPLgiyjzF9YcHjg@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Thursday, December 29, 2022, Floris Van Nee <florisvannee(at)optiver(dot)com>
wrote:
>
>
> Is it expected that Postgres reorders these expressions? I'd think that,
> even though Postgres decides to inline a query, it should at least evaluate
> the expressions of the inner-part before the outer part to avoid the
> division by zero.
>
>
Yes, this is working as intended, expression order is not something that is
recognized by the system . In this case protect your division with a case
expression.
David J.
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