Re: BUG #12589: Poor randomness from random() with some seeds; poor resolution

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Pedro Gimeno <pgsql-004(at)personal(dot)formauri(dot)es>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #12589: Poor randomness from random() with some seeds; poor resolution
Date: 2015-01-21 02:23:15
Message-ID: 2409.1421806995@sss.pgh.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-bugs

Pedro Gimeno <pgsql-004(at)personal(dot)formauri(dot)es> writes:
> Tom Lane wrote, On 2015-01-20 03:59:
>> The characteristics of the values returned by random() depend on
>> the system implementation.
>>
>> That seems to me to be a sufficient "caveat".

> That caveat is not in the 9.1 manual which is the version I reported
> this issue against.

Good point. It looks like Heikki added that text in 9.4, and didn't
back-patch.

> Can it be backported to the versions of the manual where it applies?

Done.

regards, tom lane

In response to

Responses

Browse pgsql-bugs by date

  From Date Subject
Next Message Michael Paquier 2015-01-21 02:58:53 Re: BUG #12050: Orphaned base files
Previous Message David G Johnston 2015-01-20 21:40:37 Re: BUG #12609: use of regexp_matches drops rows when there is no match