Please forgive my ignorance, but I am still quite the newbie to both Lucene
and Solr. I was hoping to start by getting a simple example working in SOLR
and then iterate towards the more complex, given this is my first attempt at
extending Solr.
For my first iteration of SpanQuery in Solr I am thinking of starting with a
simple syntax to combine:
- SpanTermQuery
- SpanNearQuery
The logical syntax would be something like:
TermQuery-1(term1 distance term2), TermQuery-2(term3 distance term4),
SpanNearQuery-1 (TermQuery-1 distance TermQuery-2)
Looks like I should look at the Xml-Query-Parser as a reference
implementation on the Lucene side and the FooQParserPlugin as a reference
implementation on the SOLR side?
The other part of the riddle I would really appreciate some guidance on is
how to get it to plug-in to SOLR correctly?
Once I get the basics working then I will look into other features and a
more expressive query syntax:
- SpanOrQuery
- SpanNotQuery
- SpanFirstQuery
- Qsol - as sentence and paragraph support will be nice.
Appreciate any guidance,
Christopher
-----Original Message-----
From: Yonik Seeley [mailto:yo...@lucidimagination.com]
Sent: Wednesday, January 27, 2010 1:06 PM
To: solr-user@lucene.apache.org
Subject: Re: How to Implement SpanQuery in Solr . . ?
As always, I'd try starting with what the user interface (in this
case, syntax) should look like.
It makes sense to add elementary spans first.
{!spannear a=query1 b=query2 slop=10}
Thinking about implementation... what would really magnify the
usefulness of the basic API above is to convert non-span queries to
span queries automatically. This is useful because the sub-queries of
a span query must be span queries, and most query parsers generate
non-span queries. I think there is code in the highlighter that uses
spans that can do this conversion.
-Yonik
http://www.lucidimagination.com
On Wed, Jan 27, 2010 at 12:24 PM, Christopher Ball
<christopher.b...@metaheuristica.com> wrote:
> I am about to attempt to implementing the SpanQuery in Solr 1.4.
>
>
>
> I noticed there is a JIRA to add it in 1.5:
>
>
>
> * https://issues.apache.org/jira/browse/SOLR-1337
>
>
>
> I also noticed a couple of email threads from Grant and Yonik about trying
> to implement it such as:
>
>
>
> * http://old.nabble.com/SpanQuery-support-td15246477.html
>
>
>
> So . . .
>
>
>
> * Question: Has anyone started working on SOLR-1337 for Solr 1.5?
>
>
>
> And if not . . .
>
>
>
> * Question: Is the best way to go about it is to follow the
following
> recipe?
>
>
>
> 1. Configure
>
> a. Specify a new parser plugin in solrconfig.xml:
>
> b. <queryParser name="mySpanQueryParser"
> class="SpanQueryParserPlugin"/>
>
> 2. Implement
>
> a. Use the FooQParserPlugin as a starting template
>
(https://svn.apache.org/repos/asf/lucene/solr/trunk/src/test/org/apache/solr
> /core/SOLR749Test.java)
>
> 3. Access
>
> a. Access the current query type via 'q=mySpanQueryParser '
>
>
>
> Most grateful for any thoughts,
>
>
>
> Christopher
>
>
