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https://issues.apache.org/jira/browse/LUCENE-5620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13980426#comment-13980426
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Ahmet Arslan commented on LUCENE-5620:
--------------------------------------
[~rcmuir] , here is another ammo: ASCIIFoldingFilter's preserveOriginal=true
breaks wildcard queries, since it is a MultiTermAwareComponent.
{code:xml}
<fieldType name="text_general" class="solr.TextField"
positionIncrementGap="100">
<analyzer>
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.ASCIIFoldingFilterFactory" preserveOriginal="true"/>
</analyzer>
</fieldType>
{code}
With the above type, {{q=manu:Belkı*}} yields:
{code}
"error": {
"msg": "analyzer returned too many terms for multiTerm term: Belkı",
"code": 400
}
{code}
I think preserveOriginal is dangerous for token filters that implement
MultiTermAwareComponent.
What is the preferred action here? Document this limitation/behavior? Or
consider this as a bug and open a jira?
> LowerCaseFilter.preserveOriginal
> --------------------------------
>
> Key: LUCENE-5620
> URL: https://issues.apache.org/jira/browse/LUCENE-5620
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Mike Sokolov
> Attachments: LUCENE-5620.patch, LUCENE-5620.patch
>
>
> Following closely the model of LUCENE-5437 (which worked on
> ASCIIFoldingFilter), this patch adds the ability to preserve the original
> token to LowerCaseFilter. This is useful if you want an all-lowercase search
> term to match without regard to case, while search terms with uppercase
> letters match in a case-sensitive manner.
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