i have the same problem here. I have an interest bit field, which i
receive from the applciation backend. I have control over how the docuemtns
are built.
To be specific, the field looks like this:
ID: interest
1 : sport
2 : music
4 : film
8 : clubs
So someone interested in sports and music can be found by "interest & 3" =>
e.g. when using SQL.
I do not wish to Post-Filter the results
On to Lucene, Is there a filter which supports this kind of query ?
Someone suggested splitting the bits into fields:
> Document doc = new Document();
> doc.add("flag1", "Y");
> doc.add("flag2", "Y");
> IndexWriter.add(doc);
Is this helpful at all ?
Code would be helpful too as i am a newbie
ltaylor.employon wrote:
>
> Hello,
>
> I am currently evaluating Lucene to see if it would be appropriate to
> replace my company's current search software. So far everything has been
> looking great, however there is one requirement that I am not too
> certain about.
>
> What we need to do is to be able to store a bit mask specifying various
> filter flags for a document in the index and then search this field by
> specifying another bit mask with desired filters, returning documents
> that have any of the specified flags set. In other words, we are doing a
> bitwise OR on the stored filter bit mask and the specified filter bit
> mask and if it is non-zero, we want to return the document.
>
> Before I started toying around with various options myself, I wanted to
> see if any of you good folks in the Lucene community had some
> suggestions for an efficient way to implement this.
>
> We currently need to index ~8,000,000 documents. We have several filter
> flag fields, the most important of which currently has 7 possible flags
> with any combination of the flags being valid. The number of flags is
> expected to increase rather rapidly in the near future.
>
> My preemptive thanks for your suggestions,
>
>
> Lawrence Taylor
> Senior Software Engineer
> Employon
> Message was edited by: ltaylor.employon
>
>
>
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