Query facet syntax with escaped char

[Bertrand Mahé <bm...@servicepilot.com>]

Hello,

I have a collection containing a field called text defined as below in the
schema.xml file:
  <field name="text" type="string" indexed="true" stored="true"/>
  <fieldType name="string" class="solr.StrField" sortMissingLast="true"
omitNorms="true"/>

Here is an example of text: "pam_unix(cron:session): session closed for user
root"

I want to know the number of documents containing the expression "session
closed".

Below the request I use and which returns 0 documents:
 
http://10.1.1.1:8983/solr/collection/select?q=*:*&wt=json&rows=0&indent=true
&facet.threads=-1&json.facet={"column0":{"type":"query","q":"text:*session\%
20closed*"}}

But I am sure I have matching documents because the following request
returns 184 documents:
http://10.1.1.1:8983/solr/collection/select?q=text:*session%5C%20closed*&wt=
json&rows=50&indent=true

Any idea?

Thanks

Bertrand