at com.facebook.presto.raptor.util.DatabaseUtil.metadataError(DatabaseUtil.java:67)
	at com.facebook.presto.raptor.metadata.ShardIterator.computeNext(ShardIterator.java:101)
	at com.facebook.presto.raptor.metadata.ShardIterator.computeNext(ShardIterator.java:48)
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
	at com.facebook.presto.raptor.util.SynchronizedResultIterator.hasNext(SynchronizedResultIterator.java:41)
	at com.facebook.presto.raptor.RaptorSplitManager$RaptorSplitSource.isFinished(RaptorSplitManager.java:179)
	at com.facebook.presto.split.ConnectorAwareSplitSource.isFinished(ConnectorAwareSplitSource.java:59)
	at com.facebook.presto.execution.scheduler.SourcePartitionedScheduler.schedule(SourcePartitionedScheduler.java:76)
	at com.facebook.presto.execution.scheduler.SqlQueryScheduler.schedule(SqlQueryScheduler.java:304)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.sql.SQLException: Before start of result set
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:998)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:937)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:872)
	at com.mysql.jdbc.ResultSetImpl.checkRowPos(ResultSetImpl.java:787)
	at com.mysql.jdbc.ResultSetImpl.getInt(ResultSetImpl.java:2460)
	at com.mysql.jdbc.ResultSetImpl.getInt(ResultSetImpl.java:2571)
	at com.facebook.presto.raptor.metadata.ShardIterator.computeMerged(ShardIterator.java:143)
	at com.facebook.presto.raptor.metadata.ShardIterator.computeNext(ShardIterator.java:98)