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https://issues.apache.org/jira/browse/LUCENE-1380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12633355#action_12633355
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Steven Rowe commented on LUCENE-1380:
-------------------------------------
{qoute}
bq. separate out this feature to a new filter that modify the position
increment.
There may be other terms in the query outside of the quotes which should not be
treated as synonyms to the shingles.
{quote}
but they won't be in the same field, right? Solr has per-field analysis
facilities.
bq. And it was also mentioned that there were known bugs when the first token
had positionIncrement=0 (or all tokens lay at position zero instead of at
position one).
You can tell the filter to set posincr=1 for the first token.
When it receives null from its predecessor in the filter chain, it can reset
its "at the beginning" flag, and the next time it's used, it'll give posincr=1
for the first token again.
> Patch for ShingleFilter.enablePositions
> ---------------------------------------
>
> Key: LUCENE-1380
> URL: https://issues.apache.org/jira/browse/LUCENE-1380
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/analyzers
> Reporter: Mck SembWever
> Priority: Trivial
> Attachments: LUCENE-1380.patch, LUCENE-1380.patch
>
>
> Make it possible for *all* words and shingles to be placed at the same
> position, that is for _all_ shingles (and unigrams if included) to be treated
> as synonyms of each other.
> Today the shingles generated are synonyms only to the first term in the
> shingle.
> For example the query "abcd efgh ijkl" results in:
> ("abcd" "abcd efgh" "abcd efgh ijkl") ("efgh" efgh ijkl") ("ijkl")
> where "abcd efgh" and "abcd efgh ijkl" are synonyms of "abcd", and "efgh
> ijkl" is a synonym of "efgh".
> There exists no way today to alter which token a particular shingle is a
> synonym for.
> This patch takes the first step in making it possible to make all shingles
> (and unigrams if included) synonyms of each other.
> See http://comments.gmane.org/gmane.comp.jakarta.lucene.user/34746 for
> mailing list thread.
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