You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@trafodion.apache.org by "Hans Zeller (JIRA)" <ji...@apache.org> on 2018/04/25 16:30:00 UTC
[jira] [Closed] (TRAFODION-3042) RAND() function is not always
random
[ https://issues.apache.org/jira/browse/TRAFODION-3042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hans Zeller closed TRAFODION-3042.
----------------------------------
> RAND() function is not always random
> ------------------------------------
>
> Key: TRAFODION-3042
> URL: https://issues.apache.org/jira/browse/TRAFODION-3042
> Project: Apache Trafodion
> Issue Type: Bug
> Components: sql-exe
> Affects Versions: 2.2.0
> Reporter: Hans Zeller
> Assignee: Hans Zeller
> Priority: Major
> Fix For: 2.3
>
>
> When trying the RAND() function, I found that it does not always behave as I would expect. I tried this example:
> {noformat}
> >>select rand(), rand(), rand() from dual;
> (EXPR) (EXPR) (EXPR)
> ---------- ---------- ----------
> 78242471 78511383 78612225
> --- 1 row(s) selected.
> >>select rand(), rand(), rand() from dual;
> (EXPR) (EXPR) (EXPR)
> ---------- ---------- ----------
> 1589208276 1589460381 1589561223
> --- 1 row(s) selected.
> >>select rand(), rand(), rand() from dual;
> (EXPR) (EXPR) (EXPR)
> ---------- ---------- ----------
> 134371215 134724162 134858618
> --- 1 row(s) selected.
> >>
> {noformat}
> So, it seems that if we call rand() within a very short time, the value will be non-random.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)