HI, Kishore,
I found a problem with the use of java array in the JNI function for
get_result_row_ids. This should have been fixed in SVN 622. Please
give it a try.
Thanks.
John
On 4/3/13 9:47 AM, kishore g wrote:
> Thanks John, I tried that and looks like jvm crashed. I tried
> debugging the core file but could not get much info from the dump.
>
> I just added the following to milky.java processQuery method
>
> int[] rowIds= fb.get_result_row_ids(h);
> if( rowIds!=null){
> System.out.println("START row ids");
>
> for(int i=0;i<rowIds.length;i++){
> System.out.println(rowIds[i]);
> }
> System.out.println("END row ids");
> }
>
>
>
> On Tue, Apr 2, 2013 at 12:03 PM, K. John Wu <[email protected]
> <mailto:[email protected]>> wrote:
>
> Hi, Kishore,
>
> Please check out SVN revision 621. The new function is
> FastBit::get_result_row_ids.
>
> Let me know if it works for you or not.
>
> John
>
>
> On 3/30/13 10:46 PM, kishore g wrote:
> > Thanks John, that was exactly what I was looking for. Any chance of
> > exposing this in the jni wrapper?
> >
> > thanks,
> > Kishore G
> >
> >
> > On Sat, Mar 30, 2013 at 8:16 PM, K. John Wu <[email protected]
> <mailto:[email protected]>
> > <mailto:[email protected] <mailto:[email protected]>>> wrote:
> >
> > Hi, Kishore,
> >
> > If you use the ibis::query class, there is a function
> getHitRows that
> > will return the row ids.
> >
> > If you want to get at the bit vector directly, you can use the
> > function getHitVector.
> >
> > John
> >
> >
> > On 3/30/13 10:09 AM, kishore g wrote:
> > > Hi,
> > >
> > > Is there a efficient way to retrieve the bitvector after
> > applying the
> > > predicates.
> > >
> > > One way would be to add additional row_id column to the
> data and
> > then
> > > use select row_id where col1=v1 col2=v2 and iterate over
> the row_id
> > > but this is inefficient because it accesses the row_id col on
> > disk to
> > > retrieve the values. Instead we want to simply get the bit
> positions
> > > that are set to 1 after evaluating the predicates.
> > >
> > > Are there api's that allow me to get the resultant bit
> vector after
> > > evaluating the predicates?
> > >
> > > thanks,
> > > Kishore G
> > >
> > >
> > > _______________________________________________
> > > FastBit-users mailing list
> > > [email protected]
> <mailto:[email protected]>
> <mailto:[email protected]
> <mailto:[email protected]>>
> > > https://hpcrdm.lbl.gov/cgi-bin/mailman/listinfo/fastbit-users
> > >
> >
> >
>
>
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