How about the following?
BooleanQuery bq1 = new BooleanQuery();
bq1.add(new PrefixQuery(new
Term("heading",word)),BooleanClause.Occur.SHOULD);
bq1.add(new PrefixQuery(new
Term("attribute",word)),BooleanClause.Occur.SHOULD);
BooleanQuery bq = new BooleanQuery();
bq.add(bq1, BooleanClause.Occur.MUST);
if(subjectId.length()>0)
bq.add(new PrefixQuery(new Term("subject_id",subjectId)),
BooleanClause.Occur.MUST);
I think bq should now be your desired query.
-TCK
On Mon, Dec 14, 2009 at 11:50 PM, Jacob Rhoden <jrho...@unimelb.edu.au>wrote:
> Assume I have the following rather simple example that works fine:
>
> BooleanQuery bq = new BooleanQuery();
> bq.add(new PrefixQuery(new
> Term("heading",word)),BooleanClause.Occur.SHOULD);
> bq.add(new PrefixQuery(new
> Term("attribute",word)),BooleanClause.Occur.SHOULD);
>
> Now I add the following and I assume its doing what it should be doing, not
> what I expect it should be doing:
>
> BooleanQuery bq = new BooleanQuery();
> bq.add(new PrefixQuery(new
> Term("heading",word)),BooleanClause.Occur.SHOULD);
> bq.add(new PrefixQuery(new
> Term("attribute",word)),BooleanClause.Occur.SHOULD);
> if(subjectId.length()>0)
> bq.add(new PrefixQuery(new
> Term("subject_id",subjectId)),BooleanClause.Occur.MUST);
>
> This appears to be pulling out ALL records where "heading" matches or
> "attribute" matches plus all records where "subject_id" matches.
>
> How do I make it return documents that match "heading" or "attribute"
> within the "subject_id" subset?
>
> Kind regards,
> Jacob Rhoden
>
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