[SPARK-20120][SQL] spark-sql support silent mode
## What changes were proposed in this pull request? It is similar to Hive silent mode, just show the query result. see: [Hive LanguageManual+Cli](https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Cli) and [the implementation of Hive silent mode](https://github.com/apache/hive/blob/release-1.2.1/ql/src/java/org/apache/hadoop/hive/ql/session/SessionState.java#L948-L950). This PR set the Logger level to `WARN` to get similar result. ## How was this patch tested? manual tests ![manual test spark sql silent mode](https://cloud.githubusercontent.com/assets/5399861/24390165/989b7780-13b9-11e7-8496-6e68f55757e3.gif) Author: Yuming Wang <wgyumg@gmail.com> Closes #17449 from wangyum/SPARK-20120.
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@ -34,6 +34,7 @@ import org.apache.hadoop.hive.ql.Driver
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import org.apache.hadoop.hive.ql.exec.Utilities
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import org.apache.hadoop.hive.ql.processors._
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import org.apache.hadoop.hive.ql.session.SessionState
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import org.apache.log4j.{Level, Logger}
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import org.apache.thrift.transport.TSocket
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import org.apache.spark.internal.Logging
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@ -275,6 +276,10 @@ private[hive] class SparkSQLCLIDriver extends CliDriver with Logging {
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private val console = new SessionState.LogHelper(LOG)
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if (sessionState.getIsSilent) {
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Logger.getRootLogger.setLevel(Level.WARN)
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}
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private val isRemoteMode = {
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SparkSQLCLIDriver.isRemoteMode(sessionState)
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}
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