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http://wiki.apache.org/solr/SolrQuerySyntax

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  == Differences From Lucene Query Parser ==
  
  Differences in the Solr Query Parser include
-  * Range queries {{{[a TO z]}}} and prefix queries {{{a*}}} are 
constant-scoring (all matching documents get an equal score).  The scoring 
factors tf, idf, index boost, and coord are not used.  There is no limitation 
on the number of terms that match (as there was in past versions of Lucene).
+  * Range queries {{{[a TO z]}}}, prefix queries {{{a*}}}, and wildcard 
queries {{{a*b}}} are constant-scoring (all matching documents get an equal 
score).  The scoring factors tf, idf, index boost, and coord are not used.  
There is no limitation on the number of terms that match (as there was in past 
versions of Lucene).
     * Lucene 2.1 has also switched to use !ConstantScoreRangeQuery for its 
range queries.
   * A {{{*}}} may be used for either or both endpoints to specify an 
open-ended range query.
     * {{{field:[* TO 100]}}} finds all field values less than or equal to 100

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