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Nolan Lawson commented on SOLR-5379: ------------------------------------ +1 as well. Tien's patch also seems to be a better candidate seeing as they included Java tests, whereas my tests are in Python 'cuz I was lazy. :) > 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: 4.7 > > Attachments: quoted.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. -- This message was sent by Atlassian JIRA (v6.1.5#6160) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org