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https://issues.apache.org/jira/browse/SOLR-2993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13183339#comment-13183339
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James Dyer commented on SOLR-2993:
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{quote}
So should it be possible to get the suggestion "spellcheck" from "spell check",
or not? Note: I do get suggestions for terms that are in the index.
{quote}
When combining words, it will require that _at least one_ of the original terms
be not in the index.
So to use your example, WordBreakSpellChecker will combine "spell check" to
"spellcheck" provided that:
1. "spellcheck" is in the index.
2. either:
- "spell" is NOT in the index.
-OR-
- "check" is NOT in the index"
-OR-
- both "spell" and "check" are NOT in the index.
But if both "spell" and "check" are in the index, then you won't get
"spellcheck" as a suggestion. You can override this behavior if:
1. You specify "onlyMorePopular". This works if "spellcheck" has a document
frequency that is greater or equal than the highest document frequency between
"spell" and "check".
2. You apply SOLR-2585 (theoretically...not possible yet) and set
"spellcheck.alternativeTermCount" greater than zero. This would tell it to
generate alternative term suggestions for indexed terms.
If this is not consistent with what you're experiencing then there is a
possible bug in the WordBreakSpellChecker. In that case, please provide as
many details as possible (or write a failing unit test) and I can look into it
further.
> Integrate WordBreakSpellChecker with Solr
> -----------------------------------------
>
> Key: SOLR-2993
> URL: https://issues.apache.org/jira/browse/SOLR-2993
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud, spellchecker
> Affects Versions: 4.0
> Reporter: James Dyer
> Priority: Minor
> Fix For: 4.0
>
> Attachments: SOLR-2993.patch
>
>
> A SpellCheckComponent enhancement, leveraging the WordBreakSpellChecker from
> LUCENE-3523:
> - Detect spelling errors resulting from misplaced whitespace without the use
> of shingle-based dictionaries.
> - Seamlessly integrate word-break suggestions with single-word spelling
> corrections from the existing FileBased-, IndexBased- or Direct- spell
> checkers.
> - Provide collation support for word-break errors including cases where the
> user has a mix of single-word spelling errors and word-break errors in the
> same query.
> - Provide shard support.
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