RT。
异常信息：

• -31370 [main] DEBUG - dbrouter - Memory cache hit
  Exception in thread "main" java.lang.NullPointerException
  at org.tinygroup.dbrouterjdbc4.sqlprocessor.SqlProcessorFunction$RowData.getMax(SqlProcessorFunction.java:404)
  at org.tinygroup.dbrouterjdbc4.sqlprocessor.SqlProcessorFunction$RowDatas.processRowDataWithMin(SqlProcessorFunction.java:527)
  at org.tinygroup.dbrouterjdbc4.sqlprocessor.SqlProcessorFunction$RowDatas.createRowValues(SqlProcessorFunction.java:488)
  at org.tinygroup.dbrouterjdbc4.sqlprocessor.SqlProcessorFunction$RowDatas.addRowDatas(SqlProcessorFunction.java:456)
  at org.tinygroup.dbrouterjdbc4.sqlprocessor.SqlProcessorFunction.combineResult(SqlProcessorFunction.java:163)
  at org.tinygroup.dbrouterjdbc4.jdbc.TinyStatement.createMultiResultSet(TinyStatement.java:193)
  at org.tinygroup.dbrouterjdbc4.jdbc.TinyStatement.createResultByContext(TinyStatement.java:145)
  at org.tinygroup.dbrouterjdbc4.jdbc.TinyStatement.executeQuery(TinyStatement.java:133)
  at org.tinygroup.dbrouterjdbc4.jdbc.TinyPreparedStatement.executeQuery(TinyPreparedStatement.java:105)