How to change storage engine of drill?

[Guo, Ying Y]

Hi, All,

   I have installed Hadoop. I want to query data resides in HDFS ,but I have 
not copy data (region.parquet) to HDFS.
 I have modified the storage-engines.json 
(./distribution/src/resources/storage-engines.json , 
./sqlparser/src/main/resources/storage-engines.json , 
./sqlparser/target/classes/storage-engines.json)

"parquet" :
      {
        "type":"parquet",
        "dfsName" : "hdfs://127.0.0.1/"
      }
But after I run  ./sqlline -u jdbc:drill:schema=parquet -n admin -p admin
When I run the query: select * from "sample-data/region.parquet";     I still 
can get the original query results.
I don't know why.  Do I need to modify some other files?
Could someone throw some lights?

B.R.
Guo Ying