One further question:
If I wanted to construct my query using Query implementations instead of
a QueryParser (e.g. TermQuery, WildcardQuery, etc.), what's the right
way to duplicate the "OR" functionality I wrote about below? As I
mentioned, I've read that wrapping query objects in a BooleanQuery and
using Occur.SHOULD is not necessarily the same.
Any suggestions?
Ross
On 22/05/2013 11:46 AM, Ross Simpson wrote:
Jack, thanks very much! I wasn't considering a space a special character for
some reason. That has worked perfectly.
Cheers,
Ross
On May 22, 2013, at 10:24 AM, Jack Krupansky wrote:
Just escape embedded spaces with a backslash.
-- Jack Krupansky
-----Original Message----- From: Ross Simpson
Sent: Tuesday, May 21, 2013 8:08 PM
To: java-user@lucene.apache.org
Subject: Query with phrases, wildcards and fuzziness
Hi all,
I'm trying to create a fairly complex query, and having trouble constructing it.
My index contains a TextField with place names as strings, e.g.:
Port Melbourne, VIC 3207
I'm using an analyzer with just KeywordTokenizer and LowerCaseFilter, so that
my strings are not tokenized at all.
I want to support end-user searches like the following, and have them match
that string above:
Port Melbourne, VIC 3207 (exact)
Port (prefix)
Port Mel (prefix, including a space)
Melbo (wildcard)
Melburne (fuzzy)
I'm trying to get away with not parsing the query myself, and just constructing
something like this:
parser.parse( "(STRING^9) OR (STRING*^7) OR (*STRING*^5) OR (STRING~1^3) );
That doesn't seem to work, neither with QueryParser nor with
ComplexPhraseQueryParser. Specifically, I'm having trouble getting appropriate
results when there's a space in the input string, notable with the wildcard
match part (it ends up returning everything in the index).
Is my approach above possible? I also have had a look at using specific Query implementations and
combining them in a BooleanQuery, but I'm not quite sure how to replicate the "OR"
behavior I want (from reading, Occur.SHOULD is not equivalent or "OR").
Any suggestions would be appreciated.
Thanks!
Ross
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