Hi,
 
I am now adding a geoserver process to geoserver wps-core module. It has a 
input of a SimpleFeatureCollection. And I want to use SQL to query it because 
the CQL filter seems could not support property name with Chinese characters. 
Could someone give me a way to use SQL query to search something from 
SimpleFeatureCollection? Or please give me a way to use CQL filter to search 
features which has some properties with Chinese name.
 
I also have some other questions: I write a  PostGIS function and it could be 
runned by using SQL. Can I use geotools or some other ways to access it in a 
WPS process?
 
In addition, I want to know how to use geotools to implement some query like 
SQL "group by"?
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