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https://issues.apache.org/jira/browse/SOLR-5379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15163757#comment-15163757
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Daniel Aitken commented on SOLR-5379:
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Doesn't look like it from the patch, no; it's still using the extended synonym
quoted query parser.
We have a client who requires matching on multi-word synonyms, so I've I've
compiled Solr 4.10.3 with solr-5379-version-4.10.3.patch applied and have it up
and running; just testing it now, with a kind of merged config between the unit
test files provided in the patch and my regular Solr 4.x configuration.
Behaviour on quoted multi-word synonyms appears to work as expected across the
testing I performed; this works well and would be fantastic to have available.
I'm not too too concerned about drifting from edismax; unless I'm
misunderstanding, wouldn't this solution maintain features from edismax by
virtue of it being extended from it? It would be nice, however, not to maintain
a custom query parser.
So, all in all, works well for us, but I am concerned about having to
essentially maintain a fork of 4.10.3 just to support this one use case. Is
there a possibility of this making it into a release? Is there anything else
that needs to be done with it?
> Query-time multi-word synonym expansion
> ---------------------------------------
>
> Key: SOLR-5379
> URL: https://issues.apache.org/jira/browse/SOLR-5379
> Project: Solr
> Issue Type: Improvement
> Components: query parsers
> Reporter: Tien Nguyen Manh
> Labels: multi-word, queryparser, synonym
> Fix For: 4.9, master
>
> Attachments: conf-test-files-4_8_1.patch, quoted-4_8_1.patch,
> quoted.patch, solr-5379-version-4.10.3.patch, synonym-expander-4_8_1.patch,
> synonym-expander.patch
>
>
> While dealing with synonym at query time, solr failed to work with multi-word
> synonyms due to some reasons:
> - First the lucene queryparser tokenizes user query by space so it split
> multi-word term into two terms before feeding to synonym filter, so synonym
> filter can't recognized multi-word term to do expansion
> - Second, if synonym filter expand into multiple terms which contains
> multi-word synonym, The SolrQueryParseBase currently use MultiPhraseQuery to
> handle synonyms. But MultiPhraseQuery don't work with term have different
> number of words.
> For the first one, we can extend quoted all multi-word synonym in user query
> so that lucene queryparser don't split it. There are a jira task related to
> this one https://issues.apache.org/jira/browse/LUCENE-2605.
> For the second, we can replace MultiPhraseQuery by an appropriate BoleanQuery
> SHOULD which contains multiple PhraseQuery in case tokens stream have
> multi-word synonym.
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