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Posted to dev@lucene.apache.org by "Lance Norskog (JIRA)" <ji...@apache.org> on 2010/07/01 05:38:50 UTC
[jira] Commented: (SOLR-1980) Implement boundary match support
[ https://issues.apache.org/jira/browse/SOLR-1980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884147#action_12884147 ]
Lance Norskog commented on SOLR-1980:
-------------------------------------
Another use case is with phrases, especially sloppy phrases.
"^hello kitty" would find "hello kitty" at the beginning of the text.
"^hello"~5 would find "hello" among the first 5 words, but the closer to the beginning, the better. This is especially interesting for consumer searches- people tend to type the first word of a movie title first.
> Implement boundary match support
> --------------------------------
>
> Key: SOLR-1980
> URL: https://issues.apache.org/jira/browse/SOLR-1980
> Project: Solr
> Issue Type: New Feature
> Components: Schema and Analysis
> Reporter: Jan Høydahl
>
> Sometimes you need to specify that a query should match only at the start or end of a field, or be an exact match.
> Example content:
> 1) a quick fox is brown
> 2) quick fox is brown
> Example queries:
> "^quick fox" -> should only match 2)
> "brown$" -> should match 1) and 2)
> "^quick fox is brown$" -> should only match 2)
> Proposed way of implmementation is through a new BoundaryMatchTokenFilter which behaves like this:
> On the index side it inserts special unique tokens at beginning and end of field. These could be some weird unicode sequence.
> On the query side, it looks for the first character matching "^" or the last character matching "$" and replaces them with the special tokens.
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Re: [jira] Commented: (SOLR-1980) Implement boundary match support
Posted by Jan Høydahl / Cominvent <ja...@cominvent.com>.
I think the TokenFilter approach is the easiest. Another option would be to go deeper and introduce it as a native query language syntax in some way and add boundarymatch="true" as a parameter in the schema. Any opinions?
--
Jan Høydahl, search solution architect
Cominvent AS - www.cominvent.com
Training in Europe - www.solrtraining.com
On 1. juli 2010, at 05.38, Lance Norskog (JIRA) wrote:
>
> [ https://issues.apache.org/jira/browse/SOLR-1980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884147#action_12884147 ]
>
> Lance Norskog commented on SOLR-1980:
> -------------------------------------
>
> Another use case is with phrases, especially sloppy phrases.
> "^hello kitty" would find "hello kitty" at the beginning of the text.
> "^hello"~5 would find "hello" among the first 5 words, but the closer to the beginning, the better. This is especially interesting for consumer searches- people tend to type the first word of a movie title first.
>
>> Implement boundary match support
>> --------------------------------
>>
>> Key: SOLR-1980
>> URL: https://issues.apache.org/jira/browse/SOLR-1980
>> Project: Solr
>> Issue Type: New Feature
>> Components: Schema and Analysis
>> Reporter: Jan Høydahl
>>
>> Sometimes you need to specify that a query should match only at the start or end of a field, or be an exact match.
>> Example content:
>> 1) a quick fox is brown
>> 2) quick fox is brown
>> Example queries:
>> "^quick fox" -> should only match 2)
>> "brown$" -> should match 1) and 2)
>> "^quick fox is brown$" -> should only match 2)
>> Proposed way of implmementation is through a new BoundaryMatchTokenFilter which behaves like this:
>> On the index side it inserts special unique tokens at beginning and end of field. These could be some weird unicode sequence.
>> On the query side, it looks for the first character matching "^" or the last character matching "$" and replaces them with the special tokens.
>
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