Hi, yes, it would. Would it then be possible to do that and save the intermediary results into a file?
Thank you. Patrik On 12/08/12 at 12:56pm, K. John Wu wrote: > Hi, Patrik, > > Would it be possible for to issue two queries with the same where > clause, but different select clauses? > > John > > > On 12/7/12 4:13 AM, Patrik Nisen wrote: > > Hi, > > > > and thank you for your great work! > > > > I am currently looking into performing operations for pre-filtered > > sets of rows, and I would need some help to understand if this is > > possible at the moment to do with fastbit, or advice to implement it. > > > > I have a dataset saved into a single data partition and my goal is to > > perform filtering with varying conditions, save these results and use > > them as starting sets for later queries. If I have understood > > correctly, this is at the moment possible by retrieving the RIDSet from > > an evaluated query, saving that, and setting it (query::setRIDs) to the > > next query. However, I would like to use aggregate functions with the > > following queries, but I did not find a way to do similar things with > > the table interface. > > > > So my question is: how could I perform the described aggregation for a > > pre-filtered set of rows? In addition, as I'm only having one partition, > > I would prefer to save the filtering results as bitvectors > > (query::getHitVector) and reuse them later as masks due to their smaller > > size. There's a protected function query::doEvaluate having this > > functionality, and perhaps that could be opened. Would this make any > > sense? > > > > Thanks for your help! > > > > > > Patrik Nisen > > _______________________________________________ > > FastBit-users mailing list > > [email protected] > > https://hpcrdm.lbl.gov/cgi-bin/mailman/listinfo/fastbit-users > > _______________________________________________ FastBit-users mailing list [email protected] https://hpcrdm.lbl.gov/cgi-bin/mailman/listinfo/fastbit-users
