Sylvain, Your answer was what I was hoping for - that means it's not impossible to solve ;)
I'll keep an eye on the issue and in case I have the time I will dig into some code. Thanks, Jens On Wed, Aug 6, 2014 at 10:03 AM, Sylvain Lebresne <sylv...@datastax.com> wrote: > On Wed, Aug 6, 2014 at 9:41 AM, Jens Rantil <jens.ran...@tink.se> wrote > >> >> I'm struggling to see any reason for it not being supported. >> > > The time to implement it, plus a bunch of internal implementation reasons > that makes it not as trivial to support as you seem to suggest it is (of > course, this is open source, you are welcome to have a look if that's a > particular itch you want to scratch; there is even a JIRA ticket: > https://issues.apache.org/jira/browse/CASSANDRA-6377). > > >> >> Or is it considered implementation specific under what circumstances >> ALLOW FILTERING can be used? >> > > Currently, it kind of is. ALLOW FILTERING allows to execute "some" queries > that couldn't be otherwise, but not everything. Again, things that are not > supported are not mainly for implementation reasons, nothing more, and that > may/will change in the future. That said, I'm not saying documentation > cannot be improved (though I'm not sure having the doc saying "this doesn't > work" would be a lot more helpful than trying it and having the > implementation saying "this doesn't work"). > > -- > Sylvain > > >> >> Thanks, >> Jens >> >> >> On Tue, Aug 5, 2014 at 8:11 PM, Sávio S. Teles de Oliveira < >> savio.te...@cuia.com.br> wrote: >> >>> You need to create an index on attribute *c.* >>> >>> >>> 2014-08-05 9:24 GMT-03:00 Jens Rantil <jens.ran...@tink.se>: >>> >>> Hi, >>>> >>>> I'm having an issue with ALLOW FILTERING with Cassandra 2.0.8. See a >>>> minimal example here: >>>> https://gist.github.com/JensRantil/ec43622c26acb56e5bc9 >>>> >>>> I expect the second last to fail, but the last query to return a single >>>> row. In particular I expect the last SELECT to first select using the >>>> clustering primary id and then do filtering. >>>> >>>> I've been reading >>>> https://cassandra.apache.org/doc/cql3/CQL.html#selectStmt "ALLOW >>>> FILTERING" and can't wrap my head around why this won't work. >>>> >>>> Could anyone clarify this for me? >>>> >>>> Thanks, >>>> Jens >>>> >>> >>> >>> >>> -- >>> Atenciosamente, >>> Sávio S. Teles de Oliveira >>> voice: +55 62 9136 6996 >>> http://br.linkedin.com/in/savioteles >>> Mestrando em Ciências da Computação - UFG >>> Arquiteto de Software >>> CUIA Internet Brasil >>> >> >> >
