consistent random order
От | Jeff Herrin |
---|---|
Тема | consistent random order |
Дата | |
Msg-id | 15697722.58781164818297562.JavaMail.root@srv161.carpathiahost.net обсуждение исходный текст |
Ответы |
Re: consistent random order
Re: consistent random order |
Список | pgsql-sql |
<p>I am returning results ordered randomly using 'order by random()'. My issue has to do with page numbers in our web application.When I hit the 2nd page and retrieve results with an offset, ordering by random() isn't really what I want sinceI will often receive results that were on the 1st page (they get re-randomized).<br /><br />I'm looking for a way toorder in a controled random order. Maybe a UDF. Ideally I would need to do this:<br /><br />ORDER BY myRandomUDF(1234)<br/>or<br />ORDER BY myRandomUDF(2345)<p>Where the argument acts like a seed that always returns a consistentpseudo-random set. That way, when I get to the 2nd page, i know i'm getting the dataset back in the same orderthat I had on page 1, and the offset works like normal. Is this even realistically possible?<br /><br />Thanks,<br />JeffHerrin
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