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https://issues.apache.org/jira/browse/SOLR-1980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12896016#action_12896016
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Jan Høydahl commented on SOLR-1980:
-----------------------------------
Phrase slop would work as before if the ^ and $ are encoded as simple special
tokens in the index.
For multi-valued fields, each sub value need to be tagged.
I think the "^a b c$" syntax is pretty easy to understand. But does it crash
with any other feature or special char? Perhaps some existing regex stuff that
I don't know about?
> Implement boundary match support
> --------------------------------
>
> Key: SOLR-1980
> URL: https://issues.apache.org/jira/browse/SOLR-1980
> Project: Solr
> Issue Type: New Feature
> Components: Schema and Analysis
> Reporter: Jan Høydahl
>
> Sometimes you need to specify that a query should match only at the start or
> end of a field, or be an exact match.
> Example content:
> 1) a quick fox is brown
> 2) quick fox is brown
> Example queries:
> "^quick fox" -> should only match 2)
> "brown$" -> 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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