jena and StmtIterator is time consuming operation

["Khandeshi, Ami D" <Am...@pfizer.com>]

Hi all,

 

I noticed that iterating thru stmtiterator (thru hasNext) seems take
long time.  Can you suggest better/more efficient way to get information
in a stattments?

 

Here is a code base where execution query is fast, iterating thru result
is time consuming.

 

Thanks,

 

Ami

                        ResultSet results = qexec.execSelect();

                        System.out.println("got result");

                  List<Entity> entities = new ArrayList();

                  long time=System.currentTimeMillis();

                  System.out.println("Start Iteator");

                        for ( ; results.hasNext() ; )  {

 

                        System.out.println("In
iterator"+(time-System.currentTimeMillis()));

Re: jena and StmtIterator is time consuming operation

[Andy Seaborne <an...@epimorphics.com>]

What kind of dataset are you querying?

Often, much of th work is done on first call of .hasNext and .execSelect 
is just setup.  You can do:

ResultSet results = qexec.execSelect();
qexec.hasNext() ;

as hasNext() is (as is correct for iterators) idempotent between calls 
of .next.


Results aren't a StmtIterator,

	Andy


On 18/03/11 19:19, Khandeshi, Ami D wrote:
> Hi all,
>
>
>
> I noticed that iterating thru stmtiterator (thru hasNext) seems take
> long time.  Can you suggest better/more efficient way to get information
> in a stattments?
>
>
>
> Here is a code base where execution query is fast, iterating thru result
> is time consuming.
>
>
>
> Thanks,
>
>
>
> Ami
>
>                          ResultSet results = qexec.execSelect();
>
>                          System.out.println("got result");
>
>                    List<Entity>  entities = new ArrayList();
>
>                    long time=System.currentTimeMillis();
>
>                    System.out.println("Start Iteator");
>
>                          for ( ; results.hasNext() ; )  {
>
>
>
>                          System.out.println("In
> iterator"+(time-System.currentTimeMillis()));
>
>