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

```