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Editorial Team
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Asked: 2026-05-26T15:00:23+00:00

When running a search such as: field_name:# field_name:# field_name:\# where there is a record

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When running a search such as:

field_name:#
field_name:"#"
field_name:"\#"

where there is a record with the value of exactly “#”, Solr returns 0 rows.

The workaround we are having to use is to use a range query on the
field such as:

field_name:[# TO #]

and this returns the correct documents.

Use case details:
We have a field that indexes a text field and calculates a “letter
group”. This keeps only the first significant character from a value
(number or letter), and if it is a number the simply stores “#” as we
want all numbered items grouped together.

I’m also aware that we could also fix this by using a specific number
instead of the hash character, however, I though I’d raise this to see
if there is a wider issue. I’ve listed some specific details below.

Field definition:

<fieldType name="letterGrouping" class="solr.TextField" sortMissingLast="true" omitNorms="true">
<analyzer>
<tokenizer class="solr.PatternTokenizerFactory" pattern="^([a-zA-Z0-9]).*" group="1"/>
<filter class="solr.LowerCaseFilterFactory" />
<filter class="solr.TrimFilterFactory" />
<filter class="solr.PatternReplaceFilterFactory" pattern="([^a-z0-9])" replacement="" replace="all"/>
<filter class="solr.PatternReplaceFilterFactory" pattern="([0-9])" replacement="#" replace="all" />
</analyzer>
</fieldType>

Server information:

 Solr Specification Version: 3.2.0
 Solr Implementation Version: 3.2.0 1129474 - rmuir - 2011-05-30 23:07:15
 Lucene Specification Version: 3.2.0
 Lucene Implementation Version: 3.2.0 1129474 - 2011-05-30 23:08:57
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1 Answer

  1. Editorial Team

    The issue is the fieldtype is applied at both the index and query time.
    I tried to check the conversion for # for the fieldtype at query type and it seems to be returning blank.

    However, field_name:123 would return back the results, as the 123 should be converted to # and should match the indexed value.

    Or just apply the fieldType during index time.

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