[GitHub] lalicw opened a new issue #1882: NullPointerException while sqlRoute failed

[GitBox <gi...@apache.org>]

lalicw opened a new issue #1882: NullPointerException while sqlRoute failed
URL: https://github.com/apache/incubator-shardingsphere/issues/1882
 
 
   ## Bug Report
   ShardingStatement throws NullPointerException while sqlRoute failed.
   
   in the ShardingStatement .java
   `private void sqlRoute(final String sql) {
           ShardingContext shardingContext = connection.getShardingContext();
           routeResult = new StatementRoutingEngine(shardingContext.getShardingRule(), 
                   shardingContext.getMetaData(), shardingContext.getDatabaseType(), shardingContext.getShardingProperties().<Boolean>getValue(ShardingPropertiesConstant.SQL_SHOW)).route(sql);
       }`
   
   while route(sql) failed, the routeResult  will be null and throws the original exception.
   
   but in the execute method:
   `public boolean execute(final String sql) throws SQLException {
           try {
               clearPrevious();
               sqlRoute(sql);
               initStatementExecutor();
               return statementExecutor.execute();
           } finally {
               refreshTableMetaData(connection.getShardingContext(), routeResult.getSqlStatement());
               currentResultSet = null;
           }
       }`
   
   this code will invoke routeResult.getSqlStatement() and throws NullPointerException and lost the original Exception
   
   Please answer these questions before submitting your issue. Thanks!
   
   ### Which version of ShardingSphere did you use?
   3.1
   ### Which project did you use? Sharding-JDBC or Sharding-Proxy?
   Sharding-JDBC
   
   ### Expected behavior
   throw the original exception
   
   ### Actual behavior
   lost the original exception and throws NullPointerException
   
   ### Reason analyze (If you can)
   as above
   
   ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.
   as mentioned
   
   ### Example codes for reproduce this issue (such as a github link).
   as mentioned

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