Luke Shannon wrote:
Hi Tod;
Thanks for your help.
I was able to do what you said but in a much uglier way using a Boolean
Query and adding Wildcard Queries.
The end result looks like this:
The query: +(type:138) +((-name:*tim* -name:*bill* -name:*harry*
+olfaithfull:stillhere))
But this one works as expected.
Thanks!
Luke
----- Original Message -----
From: "Todd VanderVeen" <[EMAIL PROTECTED]>
To: "Lucene Users List" <lucene-user@jakarta.apache.org>
Sent: Monday, February 21, 2005 6:26 PM
Subject: Re: Optional Terms in a single query
Luke Shannon wrote:
The API I'm working with combines a series of queries into one larger one
using a boolean query.
Queries on the same field get OR's into one big query. All remaining
queries
are AND'd with this big one.
Working with in this system I have:
arg = (mario luigi bobby joe) //i do have control of how this list is
created
I pass this to the QueryParser:
Query query1 = QueryParser.parse(arg, "name", new StandardAnalyzer());
Query query2 = QueryParser.parse("stillhere", "olfaithfull", new
StandardAnalyzer());
BooleanQuery typeNegativeSearch = new BooleanQuery();
typeNegativeSearch.add(query1, false, true);
typeNegativeSearch.add(query2, true, false);
This is half the query.
It gets AND'd with the other half, to create what you see below:
+(type:181) +((-(name:tim name:harry name:bill) +olfaithfull:stillhere))
What I am having trouble with is getting the QueryParser to create
this: -name:(tim bill harry)
I feel like this is something simple, but for some reason I can't figure
it
out.
Thanks,
Luke
Is the API something you control?
Lets call the other half of you query query3. To avoid the extra nesting
you need to do the composition in a single boolean query.
Query query1 = QueryParser.parse(arg, "name", new StandardAnalyzer());
Query query2 = QueryParser.parse("stillhere", "olfaithfull", new
StandardAnalyzer());
Query query3 = ....
BooleanQuery finalQuery = new BooleanQuery();
finalQuery.add(query1, false, true);
finalQuery.add(query2, true, false);
finalQuery.add(query3, true, false);
Cheers,
Todd VanderVeen
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I would be careful using wildcards as proposed. They can be inefficient
(particularly in a list of disjunctions) but even more importantly you
are excluding more than the 3 names. Your results won't be consistent
with your intent.
Cheers,
Todd VanderVeen
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