30 maj 2007 kl. 12.21 skrev Laxmilal Menaria:
On 5/30/07, karl wettin <[EMAIL PROTECTED]> wrote:
30 maj 2007 kl. 10.51 skrev Laxmilal Menaria:
>> > What's the problem with a hit list iteration ( it should be
>> > very fast ) ?
>
> Thats okay for short index, But if index have millions of records
> or GB's data then it will get slow .
Iterate only the top n results when you gather the unique values. If
you get a million hits, ask the user to narrow down the search a bit.
Searching the forum archives for facets or faceted classification
might also be helpful.
But if I implement faceted classification, then I know whats our
classes
name, but if I don't know classes name, then what should I do ?
Then my recommend my first suggestion, that you gather the information
by iterating the top n results.
But you know the classes. There is a finite number of them and at some
point in time you have inserted them to your index. Depending on how
you store and index documents you might even be able to extract them
from the index.
For instance, you could index the class name untokenized in field used
only for that purpose. The terms in this field now represents the
available classes. You access them by seeking and iterating terms using
the IndexReader.
--
karl
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