8.12. QueryProcess

The QueryProcess takes a CQL query/filter for a given feature set as a text object and returns the results. It accepts the following parameters:

Parameter	Description
features	The layer to query.
filter	The filter to apply to the layer.
properties	The properties/transforms to return in the response.
output	The response format.

8.12.1. Query Example

The following XML is an example of the QueryProcess:

<?xml version="1.0" encoding="UTF-8"?>
<wps:Execute version="1.0.0"
    service="WPS"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://www.opengis.net/wps/1.0.0"
    xmlns:wfs="http://www.opengis.net/wfs"
    xmlns:wps="http://www.opengis.net/wps/1.0.0"
    xmlns:ows="http://www.opengis.net/ows/1.1"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xsi:schemaLocation="http://www.opengis.net/wps/1.0.0 http://schemas.opengis.net/wps/1.0.0/wpsAll.xsd">
  <ows:Identifier>geomesa:Query</ows:Identifier>
  <wps:DataInputs>
    <wps:Input>
      <ows:Identifier>features</ows:Identifier>
      <wps:Reference mimeType="text/xml" xlink:href="http://geoserver/wfs" method="POST">
        <wps:Body>
          <wfs:GetFeature service="WFS" version="1.0.0" outputFormat="GML2" xmlns:cite="http://www.opengeospatial.net/cite">
            <wfs:Query typeName="cite:AccumuloQuickStart"/>
          </wfs:GetFeature>
        </wps:Body>
      </wps:Reference>
    </wps:Input>
    <wps:Input>
      <ows:Identifier>filter</ows:Identifier>
      <wps:Data>
        <wps:ComplexData mimeType="text/plain; subtype=cql"><![CDATA[BBOX(Where, -77.5, -37.5, -76.5, -36.5)
AND (Who = 'Bierce')
AND (When DURING 2014-07-01T00:00:00.000Z/2014-09-30T23:59:59.999Z)]]></wps:ComplexData>
      </wps:Data>
    </wps:Input>
  </wps:DataInputs>
  <wps:ResponseForm>
    <wps:RawDataOutput mimeType="application/json">
      <ows:Identifier>result</ows:Identifier>
    </wps:RawDataOutput>
  </wps:ResponseForm>
</wps:Execute>

Assuming the above XML is in a file named QueryProcess_wps.xml, it can be invoked with the following curl to GeoServer:

curl -v -u admin:geoserver -H "Content-Type: text/xml" -d@QueryProcess_wps.xml localhost:8080/geoserver/wps

The query should generate results that look like:

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [ -76.513, -37.4941 ]
      },
      "properties": {
        "Who": "Bierce",
        "What": 931,
        "When": "2014-07-04T22:25:38.000+0000"
      },
      "id": "Observation.931"
    }
  ]
}