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https://issues.apache.org/jira/browse/SOLR-1980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000249#comment-13000249
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Jan Høydahl commented on SOLR-1980:
-----------------------------------
I have tried to implement this as a CharFilter and it works pretty well.
The problem I face is that inserting extra bytes at the beginning and end of
the charstream does not play well with highlighting. I get an error:
org.apache.solr.common.SolrException:
org.apache.lucene.search.highlight.InvalidTokenOffsetsException: Token card
exceeds length of provided text sized 43
at
org.apache.solr.highlight.DefaultSolrHighlighter.doHighlightingByHighlighter(DefaultSolrHighlighter.java:473)
at
org.apache.solr.highlight.DefaultSolrHighlighter.doHighlighting(DefaultSolrHighlighter.java:378)
at
org.apache.solr.handler.component.HighlightComponent.process(HighlightComponent.java:121)
> 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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