Hi Juan,
I enquired about this not so long ago. To support disjunctive queries you
will have to write a plug in. I used query-basic as a template for writing a
plug-in called query-disjunctive. See the Lucene javadocs for
org.apache.lucence.search.BooleaQuery. Check out the method called add(Query
query, boolean required, boolean prohibited). In the plug-in code specify
the required field as false.
Here's a little snippet from my query-disjunctive plug-in:
private static void addTerms(Query input, BooleanQuery output) {
Clause[] clauses = input.getClauses();
for (int i = 0; i < clauses.length; i++) {
Clause c = clauses[i];
if (!c.getField().equals(Clause.DEFAULT_FIELD))
continue; // skip non-default fields
BooleanQuery out = new BooleanQuery();
for (int f = 0; f < FIELDS.length; f++) {
Clause o = c;
if (c.isPhrase()) { // optimize phrase clauses
String[] opt = CommonGrams.optimizePhrase(c.getPhrase(), FIELDS[f]);
if (opt.length==1) {
//o = new Clause(new Term(opt[0]), c.isRequired(), c.isProhibited());
o = new Clause(new Term(opt[0]), false, c.isProhibited());
} else {
//o = new Clause(new Phrase(opt), c.isRequired(), c.isProhibited());
o = new Clause(new Phrase(opt), false, c.isProhibited());
}
}
out.add(o.isPhrase()
? exactPhrase(o.getPhrase(), FIELDS[f], FIELD_BOOSTS[f])
: termQuery(FIELDS[f], o.getTerm(), FIELD_BOOSTS[f]),
false, false);
}
//output.add(out, c.isRequired(), c.isProhibited());
output.add(out, false, c.isProhibited());
}
}
Hope this helps,
Nick.
On 05/08/05, Juan Luis de Amaya Robles < [EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I have nutch installed (0.6). It seems works fine.
> if i search for "Nasa", returns several results. But if I search for
> neither "pepito OR Nasa" nor "pepito Nasa", returns nothing.
>
> bool operators in search query works ?
>
> thanks
>
> <http://dailydurham.blogspot.com>
