| From: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
|---|---|
| To: | frank(dot)von(dot)postgresql(dot)org(at)familie-gard(dot)de |
| Cc: | "pgsql-bugs(at)postgresql(dot)org" <pgsql-bugs(at)postgresql(dot)org> |
| Subject: | Re: BUG #14737: Wrong PL/pgSQL behaviour |
| Date: | 2017-07-07 21:06:17 |
| Message-ID: | CAKFQuwYc1ZHxDs9vkG5q5=mDF6OLhYqXMyRVSEWpwSHsLh3RDQ@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Fri, Jul 7, 2017 at 1:49 PM, Frank Gard <frank(at)familie-gard(dot)de> wrote:
> In addition, the result should not differ at all between the two variants
> of
>
the function. What makes, semantically, the difference? There's none at all!
>
> FOR v_anzahl IN 1 .. p_anzahl LOOP
> [...]
>
> - wert = p_von + FLOOR( ( 1 + p_bis - p_von ) * RANDOM() )
> + wert = v_zufall
SELECT gs, random()
FROM generate_series(1,10) ser (gs)
The reason this is not a bug is for the same reason the value of random()
in the above query is different for every row.
David J.
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