I had looked into Secondary indexes, but had trouble implementing AND and OR type of queries in* RIAK-JAVA-CLIENT* I suppose Secondary indexes doesn't support search on multiple indexes using OR or AND for* Java Client.*
Also what are the ways for doing queries like ORDER BY i.e. how to sort the result based on certain parameter ? On Thu, Feb 23, 2012 at 7:08 PM, Jeremiah Peschka < jeremiah.pesc...@gmail.com> wrote: > KeyFilters filter by the key you use to identify it in Riak. That is to > say the key in key-value. > > If I key my users by name and I want to find everyone named Rajat, I would > perform a StartsWith KeyFilter operation to find all of those records. > > The downside to KeyFilters is that they must scan every record. If you are > using Bitcask, this isn't as much of a problem because that can will happen > in RAM. However with other back ends, that scan will have to touch disk and > you'll pay that I/O penalty. > > Depending on your overall data size and implemntation choices, this may or > may not be a problem for you. > > I recommend looking into secondary indexes as well. This gives you the > ability to define your own metadata however you want and use that for > querying. > > --- > Jeremiah Peschka, Managing Director, Brent Ozar PLF, LLC > Microsoft SQL Server MVP > > On Feb 23, 2012, at 12:25 AM, Rajat Mathur <rajatmath...@gmail.com> wrote: > > Can somebody tell me how to use KeyFilters [with/without MapReduce ] like, > > LogicalAndFilter,GreaterThanFilter, StartsWithFilter etc.. > * > I am not able to get on what key-values do they Filter on ?? > ** > -- * > *Rajat Mathur > B.Tech (IT) Final Year > IIIT Allahabad > > 09945990291 > > Find me @ Facebook <http://www.facebook.com/rajatmathurr> > Follow me @ Twitter <http://www.twitter.com/Raj_Mathur>* > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > -- *Rajat Mathur B.Tech (IT) Final Year IIIT Allahabad 09945990291 Find me @ Facebook <http://www.facebook.com/rajatmathurr> Follow me @ Twitter <http://www.twitter.com/Raj_Mathur>*
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