ql/src/test/queries/positive/groupby4.q - hive - Git at Google

 --! qt:dataset:src
 FROM src
 SELECT substr(src.key,1,1) GROUP BY substr(src.key,1,1)
	--! qt:dataset:src
	FROM src
	SELECT substr(src.key,1,1) GROUP BY substr(src.key,1,1)