.. _es-guide-reference-query-dsl-range-filter:

============
Range Filter
============

Filters documents with fields that have terms within a certain range. Similar to range query, except that it acts as a filter. Can be placed within queries that accept a filter.


.. code-block:: js


    {
        "constant_score" : {
            "filter" : {
                "range" : {
                    "age" : { 
                        "from" : "10", 
                        "to" : "20", 
                        "include_lower" : true, 
                        "include_upper" : false
                    }
                }
            }
        }
    }


The **range** filter top level parameters include:


=====================  ==============================================================================
 Name                   Description                                                                  
=====================  ==============================================================================
 **from**               The lower bound. Defaults to start from the first.                           
 **to**                 The upper bound. Defaults to unbounded.                                      
 **include_lower**      Should the first from (if set) be inclusive or not. Defaults to **true**     
 **include_upper**      Should the last to (if set) be inclusive or not. Defaults to **true**.       
 **gt**                 Same as setting **from** to the value, and **include_lower** to **false**.   
 **gte**                Same as setting **from** to the value, and **include_lower** to **true**.    
 **lt**                 Same as setting **to** to the value, and **include_upper** to **false**.     
 **lte**                Same as setting **to** to the value, and **include_upper** to **true**.      
=====================  ==============================================================================

Caching
=======

The result of the filter is automatically cached by default. The **_cache** can be set to **false** to turn it off.