On Aug 17, 2005, at 1:50 PM, Karl Koch wrote:
Hello experts,
I have the following code:
Query query = QueryParser.parse(queryString, searchFields[0],
analyser);
Hits hits = searcher.search(query);
and the following code for search across multiple fields:
Query query = MultiFieldQueryParser.parse(queryString, searchFields,
analyser);
hits = searcher.search(query);
I have some questions.
The query string in my application is of in a very simple format.
Basically
a number of words are separated by spaces (e.g. "dog cat"). No
additional
orperators (e.g. "+", OR, AND, etc. shall be used). But, I wand
that all of
these terms are "OR"ed by default to maximise recall (the amount of
results). How can I do that with Lucene 1.2? (I am running the
search engine
on a PDA which does not allow me to go beyong version 1.2. In the
Lucene
Book I have found parser. I have found the setOperator(int
operator) method
which however works only from Lucene 1.3 onwards. Can sombod help
me out?
Given your description, you don't need a query parser at all. Simply
tokenize the field at whitespace boundaries (you could use an
analyzer to do this if you like, or simply StringTokenizer). Then
build a BooleanQuery with nested TermQuery's all unrequired which
will give the OR nature.
Erik
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