JDBCStatsAggregator DELETE STATEMENT should escape _ and %
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                 Key: HIVE-2456
                 URL: https://issues.apache.org/jira/browse/HIVE-2456
             Project: Hive
          Issue Type: Improvement
            Reporter: Ning Zhang
            Assignee: Ning Zhang


JDBCStatsAggregator first aggregates stats from all publishers, and then delete 
these intermediate results. The delete is using LIKE operator, so it needs to 
escape '_' and '%'.

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