Ok, I just tested it.
So consider:
String string = "word -foo";
String[] fields = { "title", "body" };
For the MultField I have:
MultiFieldQueryParser qp = new MultiFieldQueryParser(fields,
SearchEngine.ANALYZER);
Query fieldsQuery = qp.parse(string);
System.out.println(fieldsQuery);
(title:word body:word) -(title:foo body:foo)
And for the boolean:
BooleanQuery fieldsQuery = new BooleanQuery();
for (String field : fields) {
QueryParser qp = new QueryParser(field, SearchEngine.ANALYZER);
fieldsQuery.add(qp.parse(string), BooleanClause.Occur.SHOULD);
}
System.out.println(fieldsQuery);
(title:word -title:foo) (body:word -body:foo)
quite different!!
On 7/26/06, Doron Cohen <[EMAIL PROTECTED]> wrote:
By the resulted query toString(), boolean query would not work correctly:
qtxt: a foo
[1] Multi Field Query (OR) : (title:a body:a) (title:foo body:foo)
[2] Multi Field Query (AND): +(title:a body:a) +(title:foo body:foo)
[3] Boolean Query : (title:a title:foo) (body:a body:foo)
--> By a chance, all are equivalent, returning doc1.
qtxt: a -foo
[1] Multi Field Query (OR) : (title:a body:a) -(title:foo body:foo)
[2] Multi Field Query (AND): +(title:a body:a) -(title:foo body:foo)
[3] Boolean Query : (title:a -title:foo) (body:a -body:foo)
--> Here [1,2] "correctly" return no docs, but [3] returns doc1.
qtxt: +a +foo
[1] Multi Field Query (OR) : +(title:a body:a) +(title:foo body:foo)
[2] Multi Field Query (AND): +(title:a body:a) +(title:foo body:foo)
[3] Boolean Query : (+title:a +title:foo) (+body:a +body:foo)
--> Now [1,2] "correctly" return doc1, but [3] returns no docs.
qtxt: a +foo
[1] Multi Field Query (OR) : (title:a body:a) +(title:foo body:foo)
[2] Multi Field Query (AND): +(title:a body:a) +(title:foo body:foo)
[3] Boolean Query : (title:a +title:foo) (body:a +body:foo)
--> All "correctly" return doc1.
- Doron
Daniel Noll <[EMAIL PROTECTED]> wrote on 25/07/2006 23:11:15:
> Marvin Humphrey wrote:
> > I believe that this will cause difficulties with prohibited terms. Say
> > you have these two documents...
> >
> > Doc 1:
> > title: a
> > body: foo
> > Doc 2:
> > title: b
> > body: bar
>
> It's not just prohibited terms. Happens for required terms too. A
> search for "a AND foo" would return no hits there even though it's a hit.
>
> Daniel
>
>
> --
> Daniel Noll
>
> Nuix Pty Ltd
> Suite 79, 89 Jones St, Ultimo NSW 2007, Australia Ph: +61 2 9280 0699
> Web: http://www.nuix.com.au/ Fax: +61 2 9212 6902
>
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