我使用shardingspare-5.2.1 正常查询，即使夸表也没有问题，但是如果加上group by 进行数据统计 则会报错，报错信息如下
Caused by: java.lang.NullPointerException: Cannot invoke "org.apache.shardingsphere.infra.metadata.database.schema.decorator.model.ShardingSphereTable.getColumns()" because "table" is null
at org.apache.shardingsphere.sharding.merge.dql.orderby.OrderByValue.getOrderValuesCaseSensitiveFromTables(OrderByValue.java:74) ~[shardingsphere-sharding-core-5.2.1.jar:5.2.1]
at org.apache.shardingsphere.sharding.merge.dql.orderby.OrderByValue.getOrderValuesCaseSensitive(OrderByValue.java:64) ~[shardingsphere-sharding-core-5.2.1.jar:5.2.1]
at org.apache.shardingsphere.sharding.merge.dql.orderby.OrderByValue.<init>(OrderByValue.java:58) ~[shardingsphere-sharding-core-5.2.1.jar:5.2.1]
at org.apache.shardingsphere.sharding.merge.dql.orderby.OrderByStreamMergedResult.orderResultSetsToQueue(OrderByStreamMergedResult.java:56) ~[shardingsphere-sharding-core-5.2.1.jar:5.2.1]
at org.apache.shardingsphere.sharding.merge.dql.orderby.OrderByStreamMergedResult.<init>(OrderByStreamMergedResult.java:50) ~[shardingsphere-sharding-core-5.2.1.jar:5.2.1]
at org.apache.shardingsphere.sharding.merge.dql.groupby.GroupByStreamMergedResult.<init>(GroupByStreamMergedResult.java:52) ~[shardingsphere-sharding-core-5.2.1.jar:5.2.1]
at org.apache.shardingsphere.sharding.merge.dql.ShardingDQLResultMerger.getGroupByMergedResult(ShardingDQLResultMerger.java:118) ~[shardingsphere-sharding-core-5.2.1.jar:5.2.1]
分表是没有问题的，断点看过分表策略，去连表的两个表名正确的，但是查询的时候，还是会去直接查询一个原表名，但因为这个表名是分表前缀，所以ShardingSphereSchema中并不存在这个表。所以就报错了。