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https://issues.apache.org/jira/browse/SOLR-13233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16764364#comment-16764364
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Alan Woodward commented on SOLR-13233:
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[[email protected]] from the mailing list:
> Why does SpellCheckCollator want to ignore tokens with incorrect offsets?
Because it's using offsets to replace terms directly in the unparsed query
> SpellCheckCollator ignores stacked tokens
> -----------------------------------------
>
> Key: SOLR-13233
> URL: https://issues.apache.org/jira/browse/SOLR-13233
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Alan Woodward
> Priority: Major
>
> When building collations, SpellCheckCollator ignores any tokens with a
> position increment of 0, assuming that they've been injected and may
> therefore have incorrect offsets (injected terms generally keep the offsets
> of the terms they're replacing, as they don't themselves appear anywhere in
> the original source). However, this assumption is not necessarily correct -
> for example, WordDelimiterGraphFilter emits stacked tokens *before* the
> original token, because it needs to iterate through all stacked tokens to
> correctly set the original token's position length.
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