[jira] [Assigned] (SOLR-8737) Managed synonym lists do not include the original term in the expand

["Jan Høydahl (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-8737?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jan Høydahl reassigned SOLR-8737:
---------------------------------

    Assignee: Jan Høydahl

> Managed synonym lists do not include the original term in the expand
> --------------------------------------------------------------------
>
>                 Key: SOLR-8737
>                 URL: https://issues.apache.org/jira/browse/SOLR-8737
>             Project: Solr
>          Issue Type: Bug
>          Components: Schema and Analysis
>    Affects Versions: 5.5
>            Reporter: Jan Høydahl
>            Assignee: Jan Høydahl
>             Fix For: 5.5.1
>
>         Attachments: SOLR-8737.patch
>
>
> Spinoff from discussion in solr-user list http://find.searchhub.org/document/8dfce8a277de0f2a
> The managed synonyms filter does not behave the same way as the original synonym filter when a list is added. The original synonyms filter with default {{expand=true}} produces the following map when parsing a line:
> Input:
> {noformat}
>   a, b, c
> {noformat}
> Becomes:
> {noformat}
>   a => a, b, c
>   b => a, b, c
>   c => a, b, c
> {noformat}
> But the managed filter excludes the original term in the mapping, so an input {{\["a", "b", "c"\]}} becomes:
> {noformat}
>   a => b, c
>   b => a, c
>   c => a, b
> {noformat}
> This can also be seen in {{TestManagedSynonymFilterFactory.java}} where it is tested explicitly, while the tests for the file based synonymfilter expect an all-way expand including the original term.
> This causes a query for "a" to *not* match documents with the term "a", but only those with term "b" or "c".
> The offending line in {{ManagedSynonymFilterFactory}} is this
> {code}
> 188:   treeTerms.remove(origTerm);
> {code}



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