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From Daniel Noll <dan...@nuix.com>
Subject Re: Searching by bit masks
Date Mon, 27 Nov 2006 22:14:09 GMT
Erick Erickson wrote:
> Well, you really have the code already <G>. From the top...
> 
> 1> there's no good way to support searching bitfields If you wanted, you
> could probably store it as a small integer and then search on it, but 
> that's
> waaay too complicated than you want.
> 
> 2> Add the fields like you have the snippet from, something like
> Document doc = new Document.
> if (bitsfromdb & 1) {
>    doc.add("sport", "y");
> }
> if (bitsfromdb & 2) {
>    doc.add("music", "y");
> }

Beware that if there are a large number of bits, this is going to impact 
memory usage due to there being more fields.

Perhaps a better way would be to use a single "bits" field and store the 
words "sport", "music", ... in that field.

Daniel


-- 
Daniel Noll

Nuix Pty Ltd
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Web: http://nuix.com/                               Fax: +61 2 9212 6902

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