Hi Luigi, Thank you. I've already saw the slides. The idea is to divide the chain into dates, hours, etc. I'm not sure if the query I'd like to do will work nice at the boundaries of the time slots.
понедельник, 16 марта 2015 г., 12:26:48 UTC+3 пользователь Luigi Dell'Aquila написал: > > Hi Vadim, > > I don't know how many items you expect in your db, but I think your data > representation could take you to very expensive queries... > I suggest you to take a look at this, maybe you can pick some ideas > http://www.slideshare.net/LuigiDellAquila/orientdb-time-representation > > Luigi > > > 2015-03-16 9:39 GMT+01:00 <[email protected] <javascript:>>: > >> Hi, >> >> We're testing OrientDB as a storage for time series data. Time series are >> represented as a chain: every node has some attributes (type of event, >> timestamp, ...) and a link to the next node in the sequence. >> >> We need to execute the following query. Select all subsets of events from >> the chain that are limited by a particular time frame (say, are close >> enought to each other, time between any pair of events from a subset must >> be less then a constant) that contain events of specified types. >> >> Does anybody know if OrientDB is good for such kind of queries and how to >> express the query using OrientDB query language? >> >> -- >> >> --- >> You received this message because you are subscribed to the Google Groups >> "OrientDB" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- --- You received this message because you are subscribed to the Google Groups "OrientDB" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
