Alternatively, xdmp:query-meters() will return the actual wallclock time as part of its output. Two potential issues with this: - resolution of timer of your operating system may still be "too fast" - arguably, using a sledgehammer for a fly, considering the size of the structure that query-meters() returns, when all you want is the wallclock time
I prefer pure random()-based or hybrid (ie. stable clock + random etc.) approaches myself. ian -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gerety, Colin Sent: Monday, May 14, 2007 2:17 PM To: General Mark Logic Developer Discussion Subject: RE: [MarkLogic Dev General] About hash map function Thanks for pointing out that current-dateTime() is "stable". I had missed that. Colin Gerety Flatirons Solutions Corporation -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ryan Grimm Sent: Monday, May 14, 2007 3:05 PM To: General Mark Logic Developer Discussion Subject: Re: [MarkLogic Dev General] About hash map function Hi Rashid, In XQuery, the current-dateTime() will always return the same value during the execution of the query. To see this try executing this query: current-dateTime(), xdmp:sleep(5000), current-dateTime() You'll see that result of current-dateTime() is the same for both calls even though there was a sleep in there for 5 seconds. If you're looking for a unique value for some id's you could probably use xdmp:random() to generate an unsigned 64bit integer. While there is a small possibility of xdmp:random() returning the same value twice, the same potential problem exists for xdmp:hash64(). Hope that helps. --Ryan Nizamuddin, Rashid wrote: > Could anybody please tell me why I am not getting a unique value when I > execute this loop > > *let $cnt := 1 to 5* > > *for $c in $cnt* > > *return * > > * let $str := xdmp:hash64(string(current-dateTime()))* > > * return $str* > > * * > > *for each iteration I get the same value. I need to get a unique value > to insert in some ids elements.* > > * * > > *Any help will be appreciated* > > * * > > *Rashid* > > * * > > > ------------------------------------------------------------------------ > > _______________________________________________ > General mailing list > [email protected] > http://xqzone.com/mailman/listinfo/general _______________________________________________ General mailing list [email protected] http://xqzone.com/mailman/listinfo/general _______________________________________________ General mailing list [email protected] http://xqzone.com/mailman/listinfo/general _______________________________________________ General mailing list [email protected] http://xqzone.com/mailman/listinfo/general
