I think the semantics of positions across fields isn't well defined,
which is why SpanQuery requires a single field. The workaround is to
add a 4th field that is a combo of 1, 2 and 3. Alternatively, since
you are doing an OrQuery, just process the Spans from each
SpanTermQuery separately, i.e.:
SpanTermQuery field1 = new SpanTermQuery(new Term("field1", "hello"));
Spans f1Spans = field1.getSpans();
//do something
SpanTermQuery field2 = new SpanTermQuery(new Term("field2", "hello"));
Spans f2Spans = field2.getSpans();
//do something
SpanTermQuery field3 = new SpanTermQuery(new Term("field3", "hello"));
same as above.
I suppose there is some waste in this approach, since you may end up
iterating over the same doc again.
-Grant
On Sep 18, 2007, at 1:22 PM, gsanctus wrote:
Hello,
I have an index with tree fields (field1, field2,field3).
I have to do an or-query and get term positions within a document.
So I'm using span query but I have a problem because
with spans I can't write
...
SpanTermQuery field1 = new SpanTermQuery(new Term("field1", "hello"));
SpanTermQuery field2 = new SpanTermQuery(new Term("field2", "hello"));
SpanTermQuery field3 = new SpanTermQuery(new Term("field3", "hello"));
SpanOrQuery or = new SpanOrQuery(new SpanQuery[] {field1,
field2,field3});
With this code I get an error because SpanOrQuery Clauses must have
same
field.
My question is:
Is defined a field positions iterator on Spans or other structure ???
Can you help me???
Thanks
--
View this message in context: http://www.nabble.com/Span-Query-on-
different-fields-tf4475788.html#a12761926
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http://lucene.grantingersoll.com
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