Yes, but also include funs in Riak and could be enabled by
passing sending. To enable regex matching the args might contain a 'regex'
atom. Taking the my previous example you could match a timerange by
passing a term [{datetime, [{month, [8], {hour, [{8, 16}]}]}] which
translates to anything in august between 08:00 and 16:00.I would be happy to assist with the implementation if you want. Taking a quick peek riak-erlang-client and riak_pb it would need some additional changes to be able to pass opts but it's not to difficult. Any other opinions on implementing such feature? Olav 2013/4/17 Martin Sumner <martin.sum...@adaptip.co.uk> > Olav, > > Do you mean similar to passing a map function into M/R, but a function > which is applied to the term rather than the object? I agree that would be > neater, and much more powerful ... I just don't know how to do it. > > I'm short of time at the moment to progress this, but perhaps in the next > couple of weeks I may try and revisit that idea. > > Martin > > > On 17 April 2013 11:06, Olav Frengstad <o...@fwt.no> wrote: > >> The features sounds very promising, from a ease-of-use perspective >> feature #3 and #4 definitely have great value. Being able to do >> multi-conditional 2i queries based on composite keys is something >> im personally excited about. >> >> Out of curiosity, have you thought about adding additional flexibility >> to the query iterator by being able to add "pluggable" match functions? >> Especially I'm thinking of querying ISO-8601 dates that matches a >> certain criteria (eg get all data between 08:00-16:00 in august for >> all years). At least facilitating for more advanced matching functions >> could be a good idea. >> >> Olav >> >> 2013/4/16 Martin Sumner <martin.sum...@adaptip.co.uk>: >> > I've been working on an experimental branch to offer some improvements >> to >> > the functionality and performance of 2i queries in Riak: >> > https://github.com/martinsumner/riak_kv >> > >> > Explanation: >> > >> https://github.com/martinsumner/riak_kv/blob/master/docs/index_speedup.md >> > >> > There are four basic features that are included: >> > 1. The ability to pin particular 2i indexes into memory (without loss of >> > consistency on restart of a node) >> > 2. The ability to set partition-level static bloom filters for >> particular 2i >> > indexes to greatly reduce the disk overheads of exact-term queries with >> > small result sets (e.g. for queries by a secondary identifier such as >> email >> > address) >> > 3. The ability to return indexterms, not just keys as results of a >> query - >> > so that those terms can be overloaded with additional information which >> can >> > then be filtered by the application without requiring a M/R stage (note >> this >> > is already available via Russell Brown's branch - >> > https://github.com/basho/riak_kv/tree/pt34-index-values) >> > 4. The ability to pass a regular expression to the query iterator - so >> that >> > range queries will be filtered based on matches to that regular >> expression >> > (for example allowing for non-trailing wildcards) before returning the >> keys >> > and terms >> > >> > Testing is slight at the moment, both functionally and non-functionally. >> > This is still very-much an experiment. We're hoping to do some full >> scale >> > volume testing on the branch in the next couple of weeks. >> > >> > The branch has been developed to solve some problems we have with edge >> cases >> > in our implementation for the NHS in England - where we have to support >> > tracing across an 80M record demographic database. I'd be interested if >> > people thought it had value in other environments. >> > >> > Regards >> > >> > Martin >> > >> > >> > _______________________________________________ >> > riak-users mailing list >> > riak-users@lists.basho.com >> > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com >> > >> >> >> >> -- >> Med Vennlig Hilsen >> Olav Frengstad >> >> Systemutvikler // FWT >> +47 920 42 090 >> > > -- Med Vennlig Hilsen Olav Frengstad Systemutvikler // FWT +47 920 42 090
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