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From Satish Chennupati <>
Subject issue with case-insensitive sorting
Date Thu, 22 Sep 2016 16:09:55 GMT

Right now when I perform a sort I  am getting result as following:

"[\"18 hotfix3\"]"
"[\"Godzilla, King of the Monsters!\"]"
"[\"Harry Potter and the Sorcerers Stone\"]"
"[\"How to Train Your Dragon\"]"
"[\"Jurassic Park\"]"
"[\"My Big Fat Greek Wedding\"]"
"[\"National Treasure\"]"
"[\"Patch Adams\"]"
"[\"The Amazing Spider-Man 2\"]"
"[\"The Godfather\"]"
"[\"The Lord of the Rings: The Fellowship of the Ring\"]"
"[\"The Matrix\"]"
"[\"V for Vendetta\"]"

The field type has been defined as follows :

       <fieldType class="org.apache.solr.schema.TextField" name="TextField" sortMissingLast="true">
                <tokenizer class="solr.KeywordTokenizerFactory"/>
                <!-- lower case everything -->
                <filter class="solr.LowerCaseFilterFactory"/>
                <!-- remove lead/trail whitespace -->
                <filter class="solr.TrimFilterFactory"/>
                <!-- pad and trim numbers to an even 6 digits with leading 0's -->
                <filter class="solr.PatternReplaceFilterFactory"
                        pattern="(\d+)" replacement="00000$1" replace="all"/>
                <filter class="solr.PatternReplaceFilterFactory"
                        pattern="0*([0-9]{6,})" replacement="$1" replace="all" />


And for sorting purpose we have a dynamic field in place that used the above field type
        <!-- fields for sorting -->
        <dynamicField indexed="true" multiValued="false" name="sort_str*" stored="false"

Issue: even though we have lowercase filter factory in place the sort doesn't happen case-insensitive.

Satish Chennupati
Senior Server Engineer
Cell:         (416) 918-9959

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