shardingsphere 报错：

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Caused by: java.lang.NullPointerException
    at io.shardingsphere.core.jdbc.metadata.dialect.JDBCShardingRefreshHandler.execute(JDBCShardingRefreshHandler.java:49)
    at io.shardingsphere.core.jdbc.core.statement.ShardingPreparedStatement.execute(ShardingPreparedStatement.java:159)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:55)
    at com.sun.proxy.$Proxy35.execute(Unknown Source)

1、查看sql中是不是有  in   子查询，shardingsphere  不支持

2.、查看是不是又  distinct    不支持