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ODBC query from sql server not produce Map-Reduce job

Question asked by david on Aug 26, 2013
Hi , We have used this connector to connect hive, the hive is 0.10.0 ,and the sql server is 2012, but when we query in sql server , the query didn't produce map-reduce job. but the same query in hive command, produce the map-reduce job. Can you help me to know, why it's performance so slow and why it doesn't produce job?