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https://issues.apache.org/jira/browse/LUCENE-8137?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jan Høydahl updated LUCENE-8137:
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Attachment: SGF_SF_interaction.patch
> GraphTokenStreamFiniteStrings does not handle position inc > 1 in multi-word
> synoyms
> ------------------------------------------------------------------------------------
>
> Key: LUCENE-8137
> URL: https://issues.apache.org/jira/browse/LUCENE-8137
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 7.2.1, 8.0
> Reporter: Jim Ferenczi
> Assignee: Jim Ferenczi
> Priority: Major
> Attachments: SGF_SF_interaction.patch
>
>
> The automaton built for graph queries that contain multiple multi-word
> synonyms does not handle gaps if they appear in the middle of a multi-word
> synonym. In such case the token next to the gap is considered as part of the
> multi-word synonym.
> Stop words that appear before or after multi-word synonyms are handled
> correctly in the current version but the synonym rule "part of speech, pos"
> for instance does not create the expected query if "of" is removed by a
> filter that is set after the synonym_graph. One solution would be to reuse
> TokenStreamToAutomaton (with minor changes to add the ability to create token
> transitions rather than chars) which preserves gaps (as a transition) in the
> produced automaton.
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